/* ==================== Google Fonts ==================== */
@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;1,400&display=swap');

/* ==================== Global Variables ==================== */
:root {
    /* Modern Dark Theme - crisp, professional aesthetic */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-panel: rgba(255, 255, 255, 0.03);
    --text-primary: #e0e0e0;
    --text-secondary: #999;
    --border-color: rgba(74, 144, 226, 0.15);
    --button-bg: rgba(255, 255, 255, 0.05);
    --button-hover: rgba(255, 255, 255, 0.08);
    --button-active: #4a90e2;
    --button-active-text: #ffffff;
    --accent: #4a90e2;
    --accent-hover: #5aa3f2;
    --error: #f87171;
    --success: #6ee7a8;
    --shadow-sm: rgba(0, 0, 0, 0.3);
    --shadow-md: rgba(0, 0, 0, 0.5);

    /* Puzzle grid colors - Theme-independent (do not change with theme) */
    --puzzle-cell-bg: #ffffff;
    --puzzle-cell-border: #000000;
    --puzzle-cell-black: #000000;
    --puzzle-cell-hover: #e8e8e8;
    --puzzle-cell-selected: #b8e0dc;
    --puzzle-text-primary: #000000;
    --puzzle-text-secondary: #000000;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;

    /* Border radius (slightly more rounded for warmth) */
    --radius-sm: 4px;
    --radius-md: 6px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-sm: 13px;
    --font-size-md: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;

    /* Grid cell sizes - Universal size for all difficulties */
    --cell-size: 36px;
    
    /* Transition for smooth theme changes */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
.light-theme,
[data-theme="light"] {
    --bg-primary: #f8f7f4;
    --bg-secondary: #ffffff;
    --bg-panel: #f0ede8;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --border-color: #d4d0c8;
    --button-bg: #e8e5df;
    --button-hover: #ddd9d2;
    --button-active: #4a9a91;
    --button-active-text: #ffffff;
    --accent: #4a9a91;
    --accent-hover: #3d857d;
    --error: #dc2626;
    --success: #16a34a;
    --shadow-sm: rgba(0, 0, 0, 0.08);
    --shadow-md: rgba(0, 0, 0, 0.12);
}

/* Dark Theme (explicit class for toggle) */
.dark-theme {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-panel: rgba(255, 255, 255, 0.03);
    --text-primary: #e0e0e0;
    --text-secondary: #999;
    --border-color: rgba(74, 144, 226, 0.15);
    --button-bg: rgba(255, 255, 255, 0.05);
    --button-hover: rgba(255, 255, 255, 0.08);
    --button-active: #4a90e2;
    --button-active-text: #ffffff;
    --accent: #4a90e2;
    --accent-hover: #5aa3f2;
    --error: #f87171;
    --success: #6ee7a8;
    --shadow-sm: rgba(0, 0, 0, 0.3);
    --shadow-md: rgba(0, 0, 0, 0.5);
}

/* ==================== Reset & Base Styles ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    /* Prevent body scroll on mobile - content should scroll within containers */
}

/* Mobile-specific body behavior */
@media (max-width: 768px) {
    body {
        overflow: hidden;
        height: 100vh;
        position: fixed;
        width: 100%;
    }

    .app-container {
        overflow-y: auto;
        overflow-x: hidden;
        height: 100vh;
        width: 100%;
    }
}

/* ==================== App Container ==================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
}

/* ==================== Header ==================== */
.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: 30px var(--spacing-md) 20px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow-sm);
    gap: 20px;
    position: relative;
}

.header-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
}

.header-branding {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.header-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.na-logo {
    height: 40px;
    width: auto;
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 300;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 4px;
    color: var(--text-primary);
    margin: 0;
    text-transform: uppercase;
}

.word-count-badges {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: var(--spacing-md);
    align-items: center;
}

.word-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.word-badge strong {
    color: var(--text-primary);
    font-weight: 600;
}

.controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.home-link {
    position: absolute;
    left: 20px;
    top: 20px;
    color: var(--accent);
    text-decoration: none;
    font-size: 0.85rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    letter-spacing: 1px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.home-link:hover {
    color: var(--accent-hover);
    transform: translateX(-3px);
}

/* Header Player Controls */
.header-player-controls-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    margin-left: auto;
    margin-right: var(--spacing-md);
}

.header-player-status-display {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 4px 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    min-width: 120px;
}

.header-player-status-text {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.header-player-track-text {
    font-size: 12px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.header-player-controls {
    display: flex;
    gap: 4px; /* Match modal controls spacing */
    align-items: center;
    padding: 4px; /* Match modal controls padding */
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.header-player-controls .youtube-control-btn {
    width: 32px; /* Match modal controls size */
    height: 32px;
}

.header-player-controls .youtube-control-btn svg {
    width: 14px; /* Match modal controls icon size */
    height: 14px;
}

/* Header control button states */
.header-player-controls .youtube-control-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    transform: translateY(-1px);
}

.header-player-controls .youtube-control-btn:active {
    transform: translateY(0);
    background-color: var(--button-active);
    color: var(--button-active-text);
}

/* Highlighted state for active play/pause buttons */
.header-player-controls .youtube-control-btn.highlighted {
    background-color: rgba(94, 173, 164, 0.2) !important;
    border-color: var(--button-active) !important;
    color: var(--button-active) !important;
}

.header-player-controls .youtube-control-btn.highlighted svg {
    stroke: var(--button-active) !important;
}

.header-player-controls .youtube-control-btn.highlighted:hover {
    background-color: rgba(94, 173, 164, 0.3) !important;
}

/* Active state for currently pressed button */
.header-player-controls .youtube-control-btn.active {
    background-color: var(--button-active) !important;
    border-color: var(--button-active) !important;
    color: #fff !important;
    box-shadow: 0 0 8px rgba(94, 173, 164, 0.4) !important;
}

.header-player-controls .youtube-control-btn.active svg {
    stroke: #fff !important;
    fill: none !important;
}

/* Play/Pause button state styling */
#headerPlayPauseBtn[data-state="playing"] {
    background-color: rgba(94, 173, 164, 0.15);
    color: var(--button-active);
    border-color: var(--button-active);
}

#headerPlayPauseBtn[data-state="playing"]:hover {
    background-color: rgba(94, 173, 164, 0.25);
}

#headerPlayPauseBtn[data-state="playing"] .play-icon {
    display: none;
}

#headerPlayPauseBtn[data-state="playing"] .pause-icon {
    display: block;
}

#headerPlayPauseBtn[data-state="paused"] .play-icon {
    display: block;
}

#headerPlayPauseBtn[data-state="paused"] .pause-icon {
    display: none;
}

.header-player-divider {
    width: 1px;
    height: 24px;
    background-color: var(--border-color);
    margin: 0 var(--spacing-xs);
}

#youtubeToggleBtn.active {
    background-color: rgba(94, 173, 164, 0.15);
    color: var(--button-active);
    border-color: var(--button-active);
}

.youtube-external-btn {
    color: #FF0000;
}

.youtube-external-btn:hover {
    background-color: rgba(255, 0, 0, 0.1);
}

.youtube-external-btn:active {
    background-color: #FF0000;
    color: white;
}

.youtube-close-btn {
    color: var(--text-secondary);
}

.youtube-close-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.header-player-status {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-left: var(--spacing-sm);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .header-player-controls {
        display: none !important;
    }
}

/* ==================== Difficulty Selector ==================== */
.difficulty-selector {
    display: flex;
    gap: var(--spacing-xs);
    background-color: var(--bg-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.difficulty-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background-color: var(--button-bg);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.difficulty-btn:hover {
    background-color: var(--button-hover);
}

.difficulty-btn.active {
    background-color: var(--button-active);
    color: var(--button-active-text);
}

/* ==================== Glow Animation Keyframes ==================== */
@keyframes buttonGlow {
    0% {
        box-shadow: 0 0 5px rgba(94, 173, 164, 0.5), inset 0 0 5px rgba(94, 173, 164, 0.2);
    }
    50% {
        box-shadow: 0 0 20px rgba(94, 173, 164, 0.8), inset 0 0 10px rgba(94, 173, 164, 0.4);
    }
    100% {
        box-shadow: 0 0 5px rgba(94, 173, 164, 0.5), inset 0 0 5px rgba(94, 173, 164, 0.2);
    }
}

/* ==================== Shake Animation for Wrong Input on Locked Cell ==================== */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-3px); }
    40% { transform: translateX(3px); }
    60% { transform: translateX(-3px); }
    80% { transform: translateX(3px); }
}

.cell.shake {
    animation: shake 0.3s ease-in-out;
}

/* ==================== Generate Button ==================== */
.generate-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid rgba(74, 144, 226, 0.3);
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: #ffffff;
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0.5px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.2);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.3);
}

.generate-btn:active {
    transform: translateY(0);
}

.generate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== Solve Mode Toggle ==================== */
.solve-mode-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.solve-mode-toggle label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.solve-mode-toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--button-active);
}

.solve-mode-toggle span {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--text-primary);
}

/* ==================== Theme Toggle ==================== */
.theme-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--button-hover);
}

/* ==================== Header Action Buttons ==================== */
.action-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}

.action-btn:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.2);
}

.action-btn:active {
    transform: translateY(0);
}

/* Sidebar Visibility Toggle */
.sidebar-visibility-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.2s ease;
    padding: 0;
}

.sidebar-visibility-toggle:hover {
    background-color: var(--button-hover);
}

.sidebar-visibility-toggle.active {
    background-color: var(--button-active) !important;
    color: white !important;
    box-shadow: 0 0 0 2px var(--button-active);
}

/* YouTube button playing state */
#youtubeToggleBtn.playing {
    background-color: var(--button-active) !important;
    color: white !important;
    box-shadow: 0 0 12px rgba(94, 173, 164, 0.6);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 12px rgba(94, 173, 164, 0.6);
    }
    50% {
        box-shadow: 0 0 20px rgba(94, 173, 164, 0.8);
    }
}

/* ==================== Sidebar Navigation Panel ==================== */
.sidebar-wrapper {
    display: flex;
    gap: var(--spacing-lg);
    flex: 1;
    align-items: flex-start;
    max-width: 100%;
}

.sidebar-panel {
    flex: 0 0 250px;
    background-color: #1a1a1a;
    border: 1px solid rgba(74, 144, 226, 0.2);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    height: fit-content;
    position: sticky;
    top: var(--spacing-lg);
    z-index: 100;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Sidebar Hidden State */
.sidebar-panel.sidebar-hidden {
    display: none;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(74, 144, 226, 0.15);
    background: linear-gradient(to bottom, rgba(74, 144, 226, 0.08), transparent);
    border-radius: 8px 8px 0 0;
}

.sidebar-header h2 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: 1px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    transition: all 0.3s ease;
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.sidebar-close:hover {
    background-color: var(--button-hover);
    color: var(--text-primary);
}

.sidebar-content {
    padding: var(--spacing-md);
    overflow-y: auto;
    max-height: calc(100vh - 200px);
    transition: all 0.3s ease;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.sidebar-section h3 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 var(--spacing-sm) 0;
}

/* Adjust sidebar-specific styles for contained elements */
.sidebar-panel .difficulty-selector {
    flex-direction: column;
    padding: var(--spacing-sm);
}

.sidebar-panel .difficulty-btn {
    width: 100%;
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.sidebar-panel .solve-mode-toggle {
    margin-bottom: var(--spacing-sm);
}

.sidebar-panel .config-btn,
.sidebar-panel .generate-btn,
.sidebar-panel .print-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.sidebar-panel .config-btn:last-child,
.sidebar-panel .generate-btn:last-child,
.sidebar-panel .print-btn:last-child {
    margin-bottom: 0;
}

/* ==================== Game Timer & Save ====================*/
.game-timer-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.game-timer-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.timer-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.timer-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    min-width: 50px;
}

.timer-status {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    margin-left: auto;
}

.timer-status.running {
    background-color: rgba(110, 231, 168, 0.15);
    color: var(--success);
}

.timer-status.paused {
    background-color: rgba(251, 191, 36, 0.15);
    color: #fbbf24;
}

.timer-status.auto-paused {
    background-color: rgba(156, 163, 175, 0.15);
    color: var(--text-secondary);
}

.timer-status.stopped {
    background-color: rgba(156, 163, 175, 0.1);
    color: var(--text-secondary);
}

.game-timer-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.timer-btn {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--button-bg);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.timer-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--accent);
}

.timer-btn.save-btn {
    background-color: var(--accent);
    color: var(--button-active-text);
    border-color: var(--accent);
}

.timer-btn.save-btn:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* ==================== Saved Games List ==================== */
.saved-games-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 300px;
    overflow-y: auto;
}

.no-saved-games {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-style: italic;
}

.saved-game-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.saved-game-item:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(94, 173, 164, 0.15);
}

.saved-game-item.current {
    border-color: var(--accent);
    background-color: rgba(94, 173, 164, 0.1);
}

.saved-game-info {
    flex: 1;
    min-width: 0;
}

.saved-game-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.saved-game-meta {
    display: flex;
    gap: var(--spacing-sm);
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.saved-game-difficulty {
    text-transform: capitalize;
    padding: 1px 4px;
    background-color: var(--button-bg);
    border-radius: 3px;
}

.saved-game-time {
    font-family: 'Courier New', monospace;
}

.saved-game-progress {
    font-weight: 600;
    color: var(--accent);
}

.saved-game-date {
    font-size: 10px;
    color: var(--text-secondary);
}

.saved-game-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.saved-game-load-btn,
.saved-game-delete-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--button-bg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.saved-game-load-btn:hover {
    background-color: var(--accent);
    border-color: var(--accent);
}

.saved-game-delete-btn:hover {
    background-color: var(--error);
    border-color: var(--error);
}

/* ==================== Save Notification ==================== */
.save-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--accent);
    color: white;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.save-notification.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ==================== Main Content ==================== */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    flex: 1;
    align-items: center;
    min-width: 0;
}

/* ==================== Puzzle Container ==================== */
.puzzle-container {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
    max-width: 100%;
}

/* ==================== Debug Panel ==================== */
.debug-panel {
    flex: 0 0 auto;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px var(--shadow-md);
    display: flex;
    flex-direction: column;
    max-width: 500px;
    min-width: 200px;
    transition: all 0.3s ease;
}

.debug-panel.hidden {
    display: none;
}

.debug-panel.collapsed {
    max-width: 50px;
    min-width: 50px;
}

.debug-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.debug-panel-header h3 {
    margin: 0;
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
}

.debug-toggle {
    width: 28px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    transition: all 0.2s ease;
}

.debug-toggle:hover {
    background-color: var(--button-hover);
}

.debug-panel.collapsed .debug-toggle {
    transform: rotate(180deg);
}

.debug-panel-content {
    padding: var(--spacing-md);
    overflow-y: auto;
    max-height: calc(100vh - 300px);
}

.debug-panel.collapsed .debug-panel-content {
    display: none;
}

.debug-panel.collapsed .debug-panel-header h3 {
    display: none;
}

/* ==================== Grid Container ==================== */
.grid-container {
    flex: 1;
    background-color: var(--bg-panel);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

/* ==================== Puzzle Stats ==================== */
.puzzle-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    padding: 0;
    background-color: transparent;
    border: none;
    border-radius: 0;
    font-size: var(--font-size-sm);
}

.puzzle-stats-left {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.puzzle-stats-right {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.stat-section-header {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    display: block;
    width: 100%;
}

/* Engine Configuration Button in Debug Panel */
#puzzleStats #openEngineConfigBtn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    background-color: var(--button-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: var(--spacing-md);
}

#puzzleStats #openEngineConfigBtn:hover {
    background-color: var(--button-hover);
    border-color: var(--text-primary);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    min-height: 70px;
    justify-content: center;
    transition: all 0.2s ease;
}

.stat-item:hover {
    border-color: var(--text-secondary);
    background-color: var(--bg-panel);
}

.stat-label {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-weight: 700;
    line-height: 1.4;
}

.stat-value {
    font-size: 18px;
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
}

.stat-value.good {
    color: #2d8659;
}

.stat-value.warning {
    color: #d97706;
}

.stat-value.info {
    color: var(--button-active);
}

/* ==================== Engine Configuration Controls ==================== */
.engine-config-section {
    grid-column: 1 / -1;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.config-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--button-bg);
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: background-color 0.2s ease;
}

.config-header:hover {
    background-color: var(--button-hover);
}

.config-toggle {
    transition: transform 0.2s ease;
    display: inline-block;
}

.engine-config-section.collapsed .config-toggle {
    transform: rotate(-90deg);
}

.config-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: var(--bg-secondary);
}

.engine-config-section.collapsed .config-content {
    display: none;
}

.config-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.config-item label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.config-item input[type="range"] {
    width: 100%;
    cursor: pointer;
    accent-color: var(--button-active);
}

.config-item input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--button-active);
}

.config-item label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.config-item small {
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

.config-actions {
    display: flex;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.btn-secondary {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: background-color 0.2s ease;
}

.btn-secondary:hover {
    background-color: var(--button-hover);
}

.btn-secondary:active {
    background-color: var(--button-active);
    color: var(--button-active-text);
}

.crossword-grid {
    display: grid;
    gap: 0;
    background-color: var(--puzzle-cell-black);
    border: 2px solid var(--puzzle-cell-border);
    -webkit-user-select: none;
    user-select: none;
    position: relative;
    overflow: visible;
}

/* Universal cell size - grid dimensions set dynamically via JS */

/* ==================== Grid Cells ==================== */
.cell {
    position: relative;
    width: var(--cell-size);
    height: var(--cell-size);
    background-color: var(--puzzle-cell-bg);
    border: 0.5px solid var(--puzzle-cell-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    cursor: pointer;
    transition: background-color 0.15s ease;
    border-radius: 2px;
}

.cell.black {
    background-color: var(--puzzle-cell-black);
    cursor: default;
}

.cell:not(.black):hover {
    background-color: var(--puzzle-cell-hover);
}

.cell.selected {
    background-color: var(--puzzle-cell-selected);
}

.cell-number {
    position: absolute;
    top: 1px;
    left: 2px;
    font-size: 11px;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--puzzle-text-secondary);
    line-height: 1;
    pointer-events: none;
}

.cell-letter {
    font-size: inherit;
    color: var(--puzzle-text-primary);
    text-transform: uppercase;
}

/* ==================== Solve Mode Cells ==================== */
.cell-input {
    width: 100%;
    height: 100%;
    border: none;
    background: transparent;
    text-align: center;
    font-size: 22px;
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    text-transform: uppercase;
    color: var(--puzzle-text-primary);
    outline: none;
    caret-color: var(--accent);
}

.cell-input:focus {
    background-color: var(--puzzle-cell-selected);
}

/* Don't change appearance for locked (readonly) inputs */
.cell-input:read-only:focus {
    background-color: transparent !important;
}

/* Validation states */
.cell.correct {
    background-color: #3b82f6 !important;
    border-color: #2563eb !important;
    color: white !important;
}

.cell.correct .cell-input {
    color: white !important;
}

.cell.incorrect {
    background-color: #f8d7da !important;
    border-color: #dc3545 !important;
}

.dark-theme .cell.correct {
    background-color: #2563eb !important;
    border-color: #1d4ed8 !important;
    color: white !important;
}

.dark-theme .cell.correct .cell-input {
    color: white !important;
}

.dark-theme .cell.incorrect {
    background-color: #4a1f1f !important;
    border-color: #dc3545 !important;
}

/* ==================== Clue Click Highlight Animation ==================== */
/* Gold shimmer word outline */
.word-highlight-overlay {
    border-radius: 3px;
    animation: goldShimmerPulse 4s ease-out forwards;
}

@keyframes goldShimmerPulse {
    0% {
        box-shadow: 
            0 0 0 3px rgba(255, 215, 100, 1),
            0 0 12px 4px rgba(255, 200, 50, 0.8),
            0 0 25px 8px rgba(255, 180, 0, 0.4);
    }
    10% {
        box-shadow: 
            0 0 0 3px rgba(255, 230, 140, 1),
            0 0 18px 6px rgba(255, 210, 80, 0.9),
            0 0 35px 12px rgba(255, 190, 50, 0.5);
    }
    20% {
        box-shadow: 
            0 0 0 3px rgba(255, 200, 80, 1),
            0 0 12px 4px rgba(255, 180, 40, 0.7),
            0 0 25px 8px rgba(255, 160, 0, 0.35);
    }
    35% {
        box-shadow: 
            0 0 0 3px rgba(255, 225, 120, 1),
            0 0 20px 7px rgba(255, 215, 100, 0.85),
            0 0 40px 14px rgba(255, 200, 60, 0.45);
    }
    50% {
        box-shadow: 
            0 0 0 3px rgba(255, 210, 90, 0.9),
            0 0 15px 5px rgba(255, 190, 60, 0.6),
            0 0 30px 10px rgba(255, 170, 30, 0.3);
    }
    70% {
        box-shadow: 
            0 0 0 3px rgba(255, 200, 80, 0.5),
            0 0 10px 3px rgba(255, 180, 50, 0.3),
            0 0 20px 6px rgba(255, 160, 20, 0.15);
    }
    100% {
        box-shadow: 
            0 0 0 0 rgba(255, 200, 80, 0),
            0 0 0 0 rgba(255, 180, 50, 0),
            0 0 0 0 rgba(255, 160, 20, 0);
    }
}

/* Light theme - same gold effect */
.light-theme .word-highlight-overlay,
:root:not(.dark-theme) .word-highlight-overlay {
    animation: goldShimmerPulse 4s ease-out forwards;
}

/* ==================== Word Completion Animation ==================== */
/* Gold shimmer overlay for word completion */
.word-complete-overlay {
    border-radius: 3px;
    animation: goldCompleteShimmer 3s ease-out forwards;
}

@keyframes goldCompleteShimmer {
    0% {
        box-shadow: 
            0 0 0 3px rgba(255, 215, 100, 1),
            0 0 15px 5px rgba(255, 200, 50, 0.9),
            0 0 35px 12px rgba(255, 180, 0, 0.5);
    }
    15% {
        box-shadow: 
            0 0 0 4px rgba(255, 235, 150, 1),
            0 0 25px 8px rgba(255, 220, 100, 1),
            0 0 50px 18px rgba(255, 200, 60, 0.6);
    }
    30% {
        box-shadow: 
            0 0 0 3px rgba(255, 210, 80, 1),
            0 0 18px 6px rgba(255, 190, 50, 0.8),
            0 0 40px 14px rgba(255, 170, 30, 0.4);
    }
    50% {
        box-shadow: 
            0 0 0 3px rgba(255, 225, 120, 0.9),
            0 0 22px 7px rgba(255, 210, 90, 0.7),
            0 0 45px 16px rgba(255, 190, 50, 0.35);
    }
    70% {
        box-shadow: 
            0 0 0 3px rgba(255, 200, 80, 0.6),
            0 0 12px 4px rgba(255, 180, 50, 0.4),
            0 0 25px 8px rgba(255, 160, 20, 0.2);
    }
    100% {
        box-shadow: 
            0 0 0 0 rgba(255, 200, 80, 0),
            0 0 0 0 rgba(255, 180, 50, 0),
            0 0 0 0 rgba(255, 160, 20, 0);
    }
}

/* Light theme - same gold effect */
.light-theme .word-complete-overlay,
:root:not(.dark-theme) .word-complete-overlay {
    animation: goldCompleteShimmer 3s ease-out forwards;
}

/* Clue list item completion animation - gold flash */
.clue-item.clue-complete-animation {
    animation: clueCompleteFlashGold 3s ease-out forwards;
}

@keyframes clueCompleteFlashGold {
    0% {
        background: rgba(255, 215, 100, 0);
    }
    15% {
        background: rgba(255, 215, 100, 0.4);
    }
    30% {
        background: rgba(255, 200, 80, 0.5);
    }
    50% {
        background: rgba(255, 215, 100, 0.3);
    }
    70% {
        background: rgba(255, 200, 80, 0.15);
    }
    100% {
        background: transparent;
    }
}

/* Light theme - same gold flash */
.light-theme .clue-item.clue-complete-animation,
:root:not(.dark-theme) .clue-item.clue-complete-animation {
    animation: clueCompleteFlashGold 3s ease-out forwards;
}

/* Hide answers in solve mode */
.solve-mode .cell-letter {
    display: none;
}

/* ==================== Clues Panel ==================== */
.clues-panel {
    width: 100%;
    background: linear-gradient(135deg, var(--bg-panel) 0%, var(--bg-secondary) 100%);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 
        0 4px 16px var(--shadow-md),
        inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.clues-sections-container {
    display: flex;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.clues-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    max-width: 420px;
}

.clues-section:first-child {
    border-right: 1px solid var(--border-color);
    padding-right: var(--spacing-lg);
}

.clues-section h2 {
    font-size: 15px;
    font-weight: 700;
    color: var(--button-active);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(94, 173, 164, 0.1);
    border-radius: 8px;
    font-family: 'Lora', serif;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.clues-section h2::before {
    font-size: 14px;
}

.clues-section:first-child h2::before {
    content: '→';
}

.clues-section:last-child h2::before {
    content: '↓';
}

.clues-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.clue-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: 10px var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.clue-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--accent);
    border-radius: 0 2px 2px 0;
    transition: height 0.3s ease;
}

.clue-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(74, 144, 226, 0.2);
    transform: translateX(2px);
}

.clue-item:hover::before {
    height: 60%;
}

.clue-item.active {
    background: rgba(74, 144, 226, 0.1);
    border-color: var(--accent);
}

.clue-item.active::before {
    height: 80%;
}

.clue-item.completed {
    opacity: 0.4;
    background: transparent;
}

.clue-item.completed::before {
    display: none;
}

.clue-item.completed:hover {
    opacity: 0.5;
    background: rgba(255, 255, 255, 0.02);
}

.clue-item.completed .clue-number {
    background: rgba(110, 231, 168, 0.2);
    color: var(--success);
}

.clue-item.completed .clue-text {
    text-decoration: line-through;
    text-decoration-color: rgba(110, 231, 168, 0.4);
}

.clue-number {
    font-weight: 600;
    color: var(--accent);
    min-width: 28px;
    height: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 12px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', monospace;
    background: rgba(74, 144, 226, 0.1);
    border-radius: 4px;
    padding: 0 6px;
}

.clue-text {
    color: var(--text-primary);
    flex: 1;
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.7;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 15px;
    font-weight: 300;
    letter-spacing: 0.4px;
    padding-top: 1px;
}

/* ==================== Validation Panel ==================== */
.validation-panel {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    max-width: 100%;
}

.validation-panel h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
}

.validation-results {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.validation-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs);
    font-size: var(--font-size-sm);
    background-color: var(--bg-panel);
    border-radius: var(--radius-sm);
}

.validation-item.pass {
    color: #2d8659;
    border-left: 3px solid #2d8659;
}

.validation-item.fail {
    color: #c74440;
    border-left: 3px solid #c74440;
}

.validation-item.warning {
    color: #d97706;
    border-left: 3px solid #d97706;
}

.validation-icon {
    font-weight: bold;
    font-size: var(--font-size-lg);
}

.validation-text {
    flex: 1;
    color: var(--text-secondary);
}

.validation-overall {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    text-align: center;
    font-weight: 600;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-md);
}

.validation-overall.valid {
    background-color: rgba(45, 134, 89, 0.1);
    color: #2d8659;
    border: 1px solid #2d8659;
}

.validation-overall.invalid {
    background-color: rgba(199, 68, 64, 0.1);
    color: #c74440;
    border: 1px solid #c74440;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 1200px) {
    .clues-sections-container {
        flex-direction: column;
    }

    .clues-section:first-child {
        border-right: none;
        border-bottom: 2px solid var(--border-color);
        padding-right: 0;
        padding-bottom: var(--spacing-lg);
    }
}

/* 1080p and smaller screens - enable zoom for large puzzles */
@media (max-width: 1920px) and (max-height: 1080px) {
    .grid-container {
        overflow: auto;
        display: flex;
        justify-content: center;
        align-items: flex-start;
    }
    
    .crossword-grid {
        /* Allow the grid to be its natural size */
        width: fit-content;
        margin: 0 auto;
        /* Enable smooth scaling when user zooms */
        transform-origin: center top;
    }
    
    /* Zoom instructions - visible on 1080p screens only */
    .zoom-instructions {
        padding: var(--spacing-sm) var(--spacing-md);
        background-color: var(--bg-secondary);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        color: var(--text-secondary);
        font-size: var(--font-size-sm);
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-xs);
    }
    
    .zoom-instructions kbd {
        padding: 2px 6px;
        background-color: var(--bg-panel);
        border: 1px solid var(--border-color);
        border-radius: 3px;
        font-family: monospace;
        font-size: 12px;
        font-weight: 600;
        color: var(--text-primary);
    }
}

/* Hide zoom instructions outside of 1080p range (including mobile) */
@media (min-width: 1921px), (min-height: 1081px) {
    .zoom-instructions {
        display: none;
    }
}

@media (max-width: 768px) {
    /* Hide zoom instructions on mobile */
    .zoom-instructions {
        display: none !important;
    }
    
    /* Reduce all spacing for mobile */
    :root {
        --spacing-xs: 2px;
        --spacing-sm: 4px;
        --spacing-md: 6px;
        --spacing-lg: 8px;
        --spacing-xl: 12px;
        --cell-size: 32px;
    }

    /* App container - minimal padding */
    .app-container {
        padding: var(--spacing-sm);
    }

    /* Header adjustments - compact, allow wrapping */
    .header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
        padding: 15px;
        margin-bottom: var(--spacing-md);
        position: static !important;
    }

    /* Fix home link on mobile - prevent overlap */
    .home-link {
        position: static !important;
        display: block;
        text-align: left;
        align-self: flex-start;
        margin-bottom: 15px;
        transform: none;
        left: auto;
        top: auto;
    }

    .home-link:hover {
        transform: translateX(-3px);
    }

    /* Ensure header-main stacks properly and centers content */
    .header-main {
        width: 100%;
        align-items: center;
        text-align: center;
    }

    /* Center the branding on mobile */
    .header-branding {
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: 12px;
        width: 100%;
    }

    .header-subtitle {
        text-align: center;
        width: 100%;
        font-size: 0.75rem;
        letter-spacing: 3px;
        color: #4a90e2;
    }

    /* Stack header-actions properly on mobile */
    .header-actions {
        flex-direction: column;
        width: 100%;
        gap: 10px;
        align-items: stretch;
    }

    /* Make action buttons full width on mobile for better touch targets */
    .header-actions .action-btn,
    .header-actions .sidebar-visibility-toggle,
    .header-actions .theme-toggle {
        width: 100%;
        min-height: 44px;
        justify-content: center;
    }

    /* Hide header player controls wrapper on mobile */
    .header-player-controls-wrapper {
        display: none;
    }

    .header-title {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-xs);
        width: 100%;
    }

    .na-logo {
        height: 36px;
    }

    .header h1 {
        font-size: 1.8em;
        letter-spacing: 4px;
        text-align: center;
    }

    /* Stack word count badges on mobile */
    .word-count-badges {
        flex-direction: column;
        gap: 2px;
        margin-left: 0;
        align-items: center;
        justify-content: center;
    }

    .word-badge {
        font-size: 10px;
        padding: 2px 6px;
    }

    .controls {
        flex-direction: row;
        gap: var(--spacing-xs);
        flex-wrap: wrap;
    }

    /* Mobile button layout: Compact Generate and Settings buttons */
    .generate-btn {
        flex: 1;
        min-height: 36px;
        padding: 6px 10px;
        font-size: 13px;
        font-weight: 500;
    }

    .print-btn {
        display: none !important;
    }

    .settings-btn {
        flex: 0 0 auto;
        min-height: 36px;
        padding: 6px 10px;
        font-size: 13px;
        font-weight: 500;
    }

    /* Hide desktop-only buttons on mobile */
    #debugVisibilityToggle {
        display: none !important;
    }

    #sidebarVisibilityToggle,
    .sidebar-visibility-toggle {
        display: none !important;
    }

    #themeToggle {
        display: none !important;
    }

    /* Hide sidebar panel on mobile - show Settings button instead */
    .sidebar-panel {
        display: none !important;
    }

    /* Keep sidebar-wrapper but let main-content expand to full width */
    .sidebar-wrapper {
        display: flex;
        gap: 0;
        flex: 1;
    }

    /* Main content takes full width on mobile */
    .main-content {
        width: 100%;
        flex: 1;
    }

    .sidebar-panel {
        flex: 0 0 auto;
        position: static;
    }

    .difficulty-selector {
        flex-wrap: wrap;
        justify-content: center;
        padding: 2px;
        gap: 2px;
    }

    .difficulty-btn {
        flex: 1;
        min-width: 70px;
        padding: 4px 8px;
        font-size: 12px;
    }

    .solve-mode-toggle {
        width: 100%;
        justify-content: center;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .generate-btn,
    .config-btn,
    .print-btn {
        width: 100%;
        padding: 6px 12px;
        font-size: 13px;
    }

    .theme-toggle {
        align-self: center;
    }

    /* Hide desktop theme toggle on mobile - use Settings modal instead */
    #themeToggle {
        display: none !important;
    }

    /* Main content adjustments - minimal padding */
    .main-content {
        padding: var(--spacing-xs);
        gap: var(--spacing-lg);
    }

    /* Grid container - minimal padding */
    .grid-container {
        padding: var(--spacing-sm);
        overflow-x: auto;
        max-width: 100%;
    }

    /* Grid adjustments for mobile */
    .crossword-grid {
        width: fit-content;
        max-width: 100%;
        overflow-x: auto;
        margin: 0 auto;
    }

    .cell {
        font-size: 14px;
    }

    .cell-number {
        font-size: 9px;
        top: 0px;
        left: 1px;
    }

    .cell-input {
        font-size: 14px;
    }

    /* Puzzle container adjustments - minimal gap */
    .puzzle-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    /* Debug panel adjustments for tablet - keep compact */
    .debug-panel {
        width: 100%;
        max-width: 100%;
        min-width: 100%;
    }

    .debug-panel-content {
        max-height: 200px;
        padding: var(--spacing-sm);
    }

    .debug-panel-header {
        padding: var(--spacing-sm);
    }

    /* Puzzle stats adjustments - minimal padding */
    .puzzle-stats {
        padding: 0;
        gap: var(--spacing-sm);
    }

    .stat-item {
        padding: 4px;
        min-height: 50px;
    }

    .stat-label {
        font-size: 10px;
    }

    .stat-value {
        font-size: 14px;
    }

    /* Clues panel mobile optimization - minimal padding, auto-fit height */
    .clues-panel {
        padding: var(--spacing-sm);
    }

    .clues-sections-container {
        flex-direction: column;
        max-height: none;
        gap: var(--spacing-sm);
    }

    .clues-section:first-child {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .clues-section h2 {
        font-size: 12px;
        margin-bottom: var(--spacing-sm);
        padding: var(--spacing-xs) var(--spacing-sm);
        letter-spacing: 1px;
    }

    .clues-list {
        gap: 4px;
    }

    .clue-item {
        padding: var(--spacing-xs) var(--spacing-sm);
        touch-action: manipulation;
        border-radius: 6px;
    }

    .clue-item::before {
        width: 2px;
    }

    .clue-text {
        font-size: 12px;
        line-height: 1.35;
    }

    .clue-number {
        font-size: 11px;
        min-width: 24px;
        height: 20px;
        padding: 0 4px;
    }

    .clue-hint {
        width: 20px;
        height: 20px;
        font-size: 14px;
    }

    /* Modal adjustments - minimal padding, maximum viewport */
    .modal-content {
        width: 98%;
        max-height: 95vh;
        margin: var(--spacing-xs);
    }

    .modal-header {
        padding: var(--spacing-sm);
    }

    .modal-header h2 {
        font-size: 16px;
    }

    .modal-body {
        padding: var(--spacing-sm);
    }

    .modal-footer {
        padding: var(--spacing-sm);
    }

    /* Module controls - compact */
    .module-controls {
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
        padding-bottom: var(--spacing-sm);
    }

    .modules-list {
        gap: var(--spacing-sm);
    }

    .module-item {
        padding: var(--spacing-sm);
    }

    .module-header {
        gap: var(--spacing-sm);
    }

    /* Mobile Settings Modal adjustments */
    .mobile-settings-modal {
        max-width: 100%;
    }

    .modal-body {
        padding: var(--spacing-md);
    }

    .settings-item {
        margin-bottom: 0;
        padding: var(--spacing-sm) 0;
    }

    .settings-label {
        font-size: 14px;
        margin-bottom: 4px;
    }

    .theme-toggle-inline {
        padding: var(--spacing-sm);
    }

    .content-modules-list {
        padding: var(--spacing-sm);
    }

    .module-checkbox-item {
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 44px;
    }

    .module-checkbox-item label {
        font-size: var(--font-size-md);
        line-height: 1.4;
    }
}

/* Extra small screens (phones in portrait) */
@media (max-width: 480px) {
    /* Even tighter spacing for small phones */
    :root {
        --spacing-xs: 2px;
        --spacing-sm: 3px;
        --spacing-md: 4px;
        --spacing-lg: 6px;
        --spacing-xl: 8px;
        --cell-size: 28px;
    }

    .app-container {
        padding: 2px;
    }

    .header {
        padding: 4px;
        margin-bottom: 4px;
    }

    .header h1 {
        font-size: 14px;
    }

    .na-logo {
        height: 38px;
    }

    .controls {
        gap: 2px;
    }

    .cell {
        font-size: 13px;
    }

    .cell-number {
        font-size: 8px;
        top: 0px;
        left: 1px;
    }

    .difficulty-btn {
        font-size: 11px;
        padding: 3px 6px;
    }

    .clue-item {
        padding: 3px;
    }

    .clue-text {
        font-size: 11px;
        line-height: 1.2;
    }

    .clue-number {
        font-size: 11px;
        min-width: 20px;
    }

    .puzzle-stats {
        flex-wrap: wrap;
    }

    .stat-item {
        min-width: 45%;
        padding: 3px;
        min-height: 40px;
    }

    .stat-label {
        font-size: 9px;
    }

    .stat-value {
        font-size: 13px;
    }

    .grid-container {
        padding: 4px;
    }

    .clues-panel {
        padding: 4px;
    }

    .clues-section {
        max-height: none;
    }

    .clues-section h2 {
        font-size: 13px;
        margin-bottom: 3px;
        padding-bottom: 2px;
    }

    .modal-content {
        width: 100%;
        max-height: 98vh;
        margin: 0;
        border-radius: 0;
    }

    .modal-header h2 {
        font-size: 15px;
    }
}

/* ==================== Configuration Button ==================== */
.config-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.config-btn:hover {
    background-color: var(--button-hover);
}

#engineConfigBtn {
    display: none; /* Hidden from players by default */
}

/* ==================== Mobile Settings Button ==================== */
.settings-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    display: none; /* Hidden by default, shown only on mobile */
}

.settings-btn:hover {
    background-color: var(--button-hover);
}

/* Show settings button on mobile, hide config button */
@media (max-width: 768px) {
    .settings-btn {
        display: inline-flex !important;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .config-btn {
        display: none;
    }
}

/* ==================== Mobile Settings Modal ==================== */
.mobile-settings-modal {
    max-width: 500px;
}

.settings-item {
    margin-bottom: 0;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.settings-item:last-child {
    border-bottom: none;
}

/* Settings row layout (label + control on same line) */
.settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    min-height: 44px;
}

.settings-label-text {
    font-size: var(--font-size-md);
    font-weight: 500;
    color: var(--text-primary);
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Compact theme toggle button */
.theme-toggle-compact {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border-color);
    background-color: var(--button-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.theme-toggle-compact:hover {
    background-color: var(--button-hover);
    transform: scale(1.05);
}

.theme-toggle-compact:active {
    transform: scale(0.95);
}

/* Toggle Switch Styles */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.3s;
    border-radius: 28px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--button-active);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* Theme indicators and separator */
.theme-indicator {
    font-size: 18px;
    opacity: 0.3;
    transition: opacity 0.3s ease;
}

.theme-separator {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    opacity: 0.5;
}

/* Highlight the active indicator based on theme state */
.settings-row:has(input#mobileThemeToggle:not(:checked)) .theme-indicator.light {
    opacity: 1;
}

.settings-row:has(input#mobileThemeToggle:checked) .theme-indicator.dark {
    opacity: 1;
}

/* Puzzle Content Button */
.settings-item-button {
    padding: 0 !important;
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    align-items: stretch;
}

.settings-content-btn {
    width: 100%;
    background-color: var(--button-active);
    color: var(--button-active-text);
    border: 1px solid var(--button-active);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-md);
    font-weight: 600;
    text-align: center;
    transition: all 0.2s ease;
    margin: var(--spacing-md) 0;
}

.settings-content-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.settings-content-btn:active {
    transform: translateY(0);
}

.settings-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    margin: 0 !important;
    padding: 0 !important;
}

.settings-accordion-content.open {
    max-height: none;
    margin: var(--spacing-sm) 0 var(--spacing-md) 0 !important;
}

.content-modules-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.module-checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    min-height: 40px;
}

.module-checkbox-item:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
}

.module-checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--button-active);
    flex-shrink: 0;
}

.module-checkbox-item label {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1.4;
    word-break: break-word;
    flex: 1;
    font-weight: 500;
}

/* Full width button */
.btn-full {
    width: 100%;
    justify-content: center;
    font-size: var(--font-size-md);
    padding: var(--spacing-md) var(--spacing-lg);
    min-height: 44px;
    display: flex;
    align-items: center;
}

/* Old styles to remove */
.settings-label {
    display: none;
}

.settings-control {
    display: none;
}

.theme-toggle-inline {
    display: none;
}

.settings-btn.active {
    background-color: var(--button-active) !important;
    color: white !important;
    box-shadow: 0 0 0 2px var(--button-active);
}

/* ==================== Modal ====================  */
.modal {
    /* Use visibility instead of display to prevent iframe throttling */
    display: flex;
    align-items: center;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    position: fixed;
    z-index: 2500;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal.active {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background-color: #1a1a1a;
    border: 1px solid rgba(74, 144, 226, 0.2);
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(74, 144, 226, 0.15);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to bottom, rgba(74, 144, 226, 0.08), transparent);
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 400;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 1px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.modal-close {
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    border: none;
    font-size: 14px;
    font-weight: 500;
    color: white;
    cursor: pointer;
    padding: 10px 20px;
    height: auto;
    width: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
    letter-spacing: 0.5px;
}

.modal-close:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.5);
    background: linear-gradient(135deg, #357abd 0%, #4a90e2 100%);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ==================== YouTube Player Modal ==================== */
.youtube-modal-content {
    width: 1400px;
    height: 85vh;
    max-width: 95vw;
    max-height: 90vh;
}

.youtube-modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* YouTube Confirmation/Prompt/Alert Modals */
.youtube-confirm-modal,
.youtube-prompt-modal,
.youtube-alert-modal {
    z-index: 3000; /* Higher than YouTube modal (2500) */
}

.youtube-confirm-modal .modal-content,
.youtube-prompt-modal .modal-content,
.youtube-alert-modal .modal-content {
    max-width: 450px;
    min-width: 350px;
}

.youtube-confirm-content h3,
.youtube-prompt-content h3,
.youtube-alert-content h3 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin: 0;
}

.youtube-confirm-modal .modal-body,
.youtube-prompt-modal .modal-body,
.youtube-alert-modal .modal-body {
    padding: var(--spacing-lg);
}

.youtube-confirm-modal .modal-body p,
.youtube-prompt-modal .modal-body p,
.youtube-alert-modal .modal-body p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    line-height: 1.5;
    white-space: pre-wrap;
}

.youtube-prompt-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-family: inherit;
}

.youtube-prompt-input:focus {
    outline: none;
    border-color: var(--button-active);
    box-shadow: 0 0 0 3px rgba(94, 173, 164, 0.15);
}

.youtube-confirm-footer,
.youtube-prompt-footer,
.youtube-alert-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.youtube-modal-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.youtube-ok-btn {
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-color: var(--button-active);
}

.youtube-ok-btn:hover {
    opacity: 0.9;
}

.youtube-cancel-btn {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.youtube-cancel-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--text-secondary);
}

/* Responsive Main Layout */
@media (max-width: 1200px) {
    .youtube-main-layout {
        grid-template-columns: 1fr 350px;
    }
}

@media (max-width: 968px) {
    .youtube-main-layout {
        grid-template-columns: 1fr;
    }
    
    .youtube-player-panel-fixed {
        order: -1; /* Move player above content on mobile */
    }
}

/* Hide YouTube player on mobile */
@media (max-width: 768px) {
    #youtubeToggleBtn {
        display: none !important;
    }
    
    #youtubeModal {
        display: none !important;
    }
}

/* Playlist Input Section */
.youtube-input-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.youtube-input-section label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.youtube-input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.youtube-playlist-input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    background-color: rgba(0, 0, 0, 0.3);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 14px;
    font-family: var(--font-family);
    transition: all 0.3s ease;
}

.youtube-playlist-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    background-color: rgba(0, 0, 0, 0.4);
}

.youtube-load-btn {
    padding: 12px 24px;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.youtube-load-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.youtube-load-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(102, 126, 234, 0.3);
}

.youtube-help-text {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Quick Links Section */
.youtube-quick-links-section {
    margin-bottom: var(--spacing-md);
}

.youtube-quick-links-section label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.youtube-quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.youtube-quick-link-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: none;
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 184, 148, 0.3);
}

.youtube-quick-link-badge:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 4px 12px rgba(0, 184, 148, 0.4);
    background: linear-gradient(135deg, #00cec9 0%, #00b894 100%);
}

.youtube-quick-link-badge:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 6px rgba(0, 184, 148, 0.3);
}

/* Tabs */
.youtube-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 4px;
}

.youtube-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 8px;
    position: relative;
}

.youtube-tab:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.youtube-tab.active {
    color: white;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.youtube-tab-content {
    display: none;
    flex-direction: column;
    height: 100%;
}

.youtube-tab-content.active {
    display: flex;
}

/* Settings Tab Section */
.youtube-settings-section {
    padding: var(--spacing-lg);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.youtube-settings-section h3 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.youtube-settings-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0 0 var(--spacing-lg) 0;
    line-height: 1.5;
}

.youtube-settings-toggle {
    margin-bottom: var(--spacing-lg);
}

.youtube-settings-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color 0.2s ease;
}

.youtube-settings-label:hover {
    background-color: var(--bg-secondary);
}

.youtube-settings-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.youtube-settings-label span {
    font-size: var(--font-size-md);
    color: var(--text-primary);
}

/* Data Management Section */
.youtube-data-management {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
}

.youtube-data-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: 0;
}

.youtube-data-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.youtube-data-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    transform: translateY(-1px);
}

.youtube-export-btn:hover {
    color: #4CAF50;
    border-color: #4CAF50;
}

.youtube-import-btn:hover {
    color: #2196F3;
    border-color: #2196F3;
}

.youtube-data-info {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

/* Header Actions Container */
.youtube-header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

/* Search Results */
.youtube-search-results {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex: 1;
    overflow-y: auto;
}

.youtube-search-result {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    position: relative;
}

.youtube-search-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    position: relative;
    min-width: 0;
}

.youtube-search-result:hover {
    border-color: var(--button-active);
    box-shadow: 0 2px 8px rgba(94, 173, 164, 0.2);
}

.youtube-search-thumbnail-container {
    position: relative;
    width: 80px;
    height: 60px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.youtube-search-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.youtube-search-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background-color: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0;
    padding: 0;
}

.youtube-search-thumbnail-container:hover .youtube-search-play-overlay {
    opacity: 1;
}

.youtube-search-play-overlay:hover {
    background-color: var(--button-active);
    transform: translate(-50%, -50%) scale(1.1);
}

.youtube-search-play-overlay svg {
    margin-left: 2px;
}

.youtube-search-info {
    flex: 1;
    min-width: 0;
}

.youtube-search-title {
    font-size: var(--font-size-md);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.youtube-search-channel {
    font-size: 11px;
    color: var(--text-secondary);
}

.youtube-search-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    width: 100%;
}

.youtube-search-result .youtube-save-btn,
.youtube-add-queue-btn,
.youtube-saved-add-queue-btn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.youtube-search-result .youtube-save-btn {
    color: var(--text-primary);
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.youtube-search-result .youtube-save-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    color: var(--button-active);
}

.youtube-search-result .youtube-save-btn.saved {
    background-color: rgba(94, 173, 164, 0.2);
    border-color: var(--button-active);
    color: var(--button-active);
}

.youtube-search-result .youtube-save-btn.saved:hover {
    background-color: rgba(94, 173, 164, 0.3);
    border-color: var(--button-active);
    color: var(--button-active);
}

.youtube-add-queue-btn,
.youtube-saved-add-queue-btn {
    color: #10b981;
}

.youtube-add-queue-btn:hover,
.youtube-saved-add-queue-btn:hover {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border-color: #10b981;
}

/* Legacy play button - not used in search results anymore */
.youtube-search-load-btn {
    padding: 4px 10px;
    border: 1px solid var(--border-color);
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.youtube-search-load-btn:hover {
    opacity: 0.85;
    box-shadow: 0 2px 4px rgba(94, 173, 164, 0.3);
}

.youtube-no-results {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Saved Videos Tab */
.youtube-saved-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.youtube-saved-header h3 {
    margin: 0;
    font-size: var(--font-size-md);
    color: var(--text-primary);
}

#youtubeClearSavedBtn,
#youtubeClearPlaylistsBtn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

#youtubeClearSavedBtn:hover,
#youtubeClearPlaylistsBtn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

#youtubeSavedVideos,
#youtubeSavedPlaylists {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    flex: 1;
    overflow-y: auto;
}

.youtube-playlist-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.youtube-playlist-item:hover {
    border-color: var(--button-active);
    box-shadow: 0 2px 8px rgba(94, 173, 164, 0.2);
}

.youtube-playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.youtube-playlist-info {
    flex: 1;
}

.youtube-playlist-name {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.youtube-playlist-meta {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.youtube-playlist-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.youtube-playlist-queue-btn,
.youtube-playlist-load-btn,
.youtube-playlist-delete-btn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.youtube-playlist-queue-btn {
    color: #10b981;
}

.youtube-playlist-queue-btn:hover {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border-color: #10b981;
}

.youtube-playlist-load-btn {
    color: var(--button-active);
}

.youtube-playlist-load-btn:hover {
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-color: var(--button-active);
}

.youtube-playlist-delete-btn {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
}

.youtube-playlist-delete-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.youtube-playlist-delete-btn svg,
.youtube-saved-remove-btn svg {
    flex-shrink: 0;
}

.youtube-saved-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    position: relative;
}

.youtube-saved-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    position: relative;
    min-width: 0;
}

.youtube-saved-item:hover {
    border-color: var(--button-active);
    box-shadow: 0 2px 8px rgba(94, 173, 164, 0.2);
}

.youtube-saved-thumbnail-container {
    position: relative;
    width: 80px;
    height: 60px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.youtube-saved-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.youtube-saved-thumbnail-fallback {
    width: 100%;
    height: 100%;
    background-color: #4a4a4a;
}

.youtube-saved-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background-color: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0;
    padding: 0;
}

.youtube-saved-thumbnail-container:hover .youtube-saved-play-overlay {
    opacity: 1;
}

.youtube-saved-play-overlay:hover {
    background-color: var(--button-active);
    transform: translate(-50%, -50%) scale(1.1);
}

.youtube-saved-play-overlay svg {
    margin-left: 2px;
}

.youtube-saved-info {
    flex: 1;
    min-width: 0;
}

.youtube-saved-title {
    font-size: var(--font-size-md);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.youtube-saved-channel {
    font-size: 11px;
    color: var(--text-secondary);
}

.youtube-saved-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    width: 100%;
}

.youtube-saved-remove-btn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.youtube-saved-remove-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* Item Type Badge */
.youtube-item-badge {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--button-active);
    color: white;
    font-size: 9px;
    font-weight: 700;
    padding: 3px 6px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

/* Now Playing Indicator */
.youtube-now-playing-indicator {
    display: inline-block;
    background-color: #10b981;
    color: white;
    font-size: 10px;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Status Indicator */
.youtube-status {
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.youtube-status.ready {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.youtube-status.loading {
    background-color: #FFF3CD;
    color: #856404;
    border: 1px solid #FFA500;
}

.youtube-status.playing {
    background-color: #D4EDDA;
    color: #155724;
    border: 1px solid #4CAF50;
}

.youtube-status.paused {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.youtube-status.stopped {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.youtube-status.error {
    background-color: #F8D7DA;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

/* YouTube Main Layout (Fixed Two-Column) */
.youtube-main-layout {
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: var(--spacing-lg);
    height: 100%;
    min-height: 600px;
}

.youtube-tabs-container {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding-right: var(--spacing-md);
}

/* Resize Handle - Removed */
.youtube-resize-handle {
    display: none;
    width: 6px;
    cursor: col-resize;
    background-color: transparent;
    position: relative;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
    user-select: none;
}

.youtube-resize-handle:hover {
    background-color: var(--button-active);
}

.youtube-resize-handle:active {
    background-color: var(--button-active);
}

.youtube-resize-handle-line {
    width: 2px;
    height: 40px;
    background-color: var(--border-color);
    border-radius: 2px;
    pointer-events: none;
    transition: all 0.2s ease;
}

.youtube-resize-handle:hover .youtube-resize-handle-line {
    background-color: var(--button-active);
    height: 60px;
    width: 3px;
}

.youtube-resize-handle:active .youtube-resize-handle-line {
    background-color: var(--button-active);
    height: 100%;
    width: 3px;
}

.youtube-resize-handle.dragging {
    background-color: var(--button-active);
}

.youtube-resize-handle.dragging .youtube-resize-handle-line {
    background-color: var(--button-active);
    height: 100%;
    width: 3px;
}

.youtube-player-panel-fixed {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: #1a1a1a;
    border: 1px solid rgba(74, 144, 226, 0.2);
    border-radius: 8px;
    padding: var(--spacing-md);
    position: sticky;
    top: 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.youtube-player-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Video Container - ALWAYS stays in same DOM location */
.youtube-player-container {
    width: 100%;
    height: 270px;
    background-color: #000;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: none; /* No transitions when switching modes */
    border: 1px solid rgba(74, 144, 226, 0.15);
}

.youtube-player-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    z-index: 10;
    pointer-events: none;
}

.youtube-player-overlay.hidden {
    display: none;
}

#youtubePlayerFrame {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Player lives at body level - positioned with these classes */

/* When modal is open - position player inside modal section */
.youtube-player-container.youtube-player-in-modal {
    position: absolute;
    display: none; /* Hidden until positioned */
    pointer-events: auto; /* Player should be interactive */
    /* Will be positioned dynamically by JS to overlay .youtube-player-section */
}

.youtube-player-container.youtube-player-in-modal.positioned {
    display: flex; /* Show after positioning */
}

.youtube-player-container.floating-mode {
    position: fixed !important; /* Use fixed positioning when floating to stay locked with frame during scroll */
}

.youtube-player-container.floating-mode iframe {
    width: 100% !important;
    height: 100% !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    border: none;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.youtube-player-container.floating-mode #youtubePlayerFrame {
    width: 100% !important;
    height: 100% !important;
    display: flex !important;
    position: relative !important;
    visibility: visible !important;
    opacity: 1 !important;
    align-items: center;
    justify-content: center;
    transform: translateZ(0);
}

/* Player section placeholder inside modal */
.youtube-player-section {
    position: relative;
    width: 100%;
    height: 270px;
    background-color: #000;
    border-radius: var(--radius-md);
}

.youtube-player-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Playlist Queue */
.youtube-queue-section {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Now Playing Display */
.youtube-now-playing {
    display: none;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.youtube-now-playing.active {
    display: block;
}

.youtube-now-playing-label {
    font-size: 10px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.youtube-now-playing-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: white;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.youtube-queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    gap: var(--spacing-md);
}

.youtube-queue-header h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* Compact Player Controls in Queue Header */
.youtube-controls-compact {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 4px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.youtube-control-btn-compact {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.youtube-control-btn-compact svg {
    width: 14px;
    height: 14px;
}

.youtube-control-btn-compact:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    transform: translateY(-1px);
}

.youtube-control-btn-compact:active {
    transform: translateY(0);
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-color: var(--button-active);
}

/* Compact play button playing state */
.youtube-control-btn-compact.youtube-play-btn.playing {
    background-color: var(--button-active);
    border-color: var(--button-active);
    color: #fff;
    box-shadow: 0 0 8px rgba(94, 173, 164, 0.5);
}

.youtube-control-btn-compact.youtube-play-btn.playing svg {
    stroke: #fff;
}

.youtube-queue-actions {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.youtube-queue-action-btn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 4px;
}

.youtube-queue-action-btn:hover {
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-color: var(--button-active);
}

.youtube-queue-action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.youtube-queue-action-btn:active {
    transform: scale(0.95);
}

.youtube-queue-section h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.youtube-queue {
    flex: 1;
    max-height: 390px;
    overflow-y: auto;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
}

.youtube-queue-empty {
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.youtube-queue-item-container {
    margin-bottom: var(--spacing-xs);
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.youtube-queue-item-container.dragging {
    opacity: 0.5;
    transform: scale(0.98);
}

.youtube-queue-item-container.drag-over {
    border-top: 2px solid var(--button-active);
    margin-top: -2px;
}

.youtube-queue-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.youtube-queue-drag-handle {
    cursor: grab;
    color: var(--text-tertiary);
    font-size: 12px;
    letter-spacing: -2px;
    padding: 0 4px;
    user-select: none;
    opacity: 0.5;
    transition: opacity 0.2s ease, color 0.2s ease;
}

.youtube-queue-drag-handle:hover {
    opacity: 1;
    color: var(--text-primary);
}

.youtube-queue-drag-handle:active {
    cursor: grabbing;
}

.youtube-queue-item:hover {
    background-color: var(--button-hover);
}

.youtube-queue-item.selected {
    background-color: rgba(94, 173, 164, 0.1);
    border-left: 3px solid var(--button-active);
}

.youtube-queue-item.active {
    background-color: rgba(94, 173, 164, 0.2);
    color: var(--text-primary);
    border-left: 3px solid var(--button-active);
    border: 2px solid var(--button-active);
    animation: pulse-playing 2s ease-in-out infinite;
}

@keyframes pulse-playing {
    0%, 100% { box-shadow: 0 0 0 0 rgba(94, 173, 164, 0.4); }
    50% { box-shadow: 0 0 0 4px rgba(94, 173, 164, 0); }
}

.youtube-queue-item.nested {
    margin-left: var(--spacing-lg);
    background-color: var(--bg-tertiary);
    font-size: var(--font-size-xs);
}

.youtube-queue-item.nested:hover {
    background-color: var(--button-hover);
}

.youtube-queue-item-index {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 32px;
    text-align: center;
}

.youtube-queue-item.active .youtube-queue-item-index {
    color: var(--button-active);
    font-weight: 700;
}

.youtube-queue-item.active .youtube-queue-item-title {
    color: var(--text-primary);
    font-weight: 600;
}

.youtube-queue-item-title {
    flex: 1;
    font-size: var(--font-size-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.youtube-queue-item-actions {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.youtube-queue-item-actions .youtube-save-btn {
    position: static;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.youtube-queue-item-actions .youtube-save-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    color: var(--button-active);
}

.youtube-queue-item-actions .youtube-save-btn.saved {
    background-color: rgba(94, 173, 164, 0.2);
    border-color: var(--button-active);
    color: var(--button-active);
}

.youtube-queue-remove-btn {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.youtube-queue-remove-btn:hover {
    background-color: #fee;
    border-color: #f44;
    color: #c22;
}

.youtube-queue-item.active .youtube-queue-item-actions .youtube-save-btn {
    background-color: var(--bg-primary);
    border-color: var(--button-active);
    color: var(--text-primary);
}

.youtube-queue-item.active .youtube-queue-item-actions .youtube-save-btn.saved {
    background-color: rgba(94, 173, 164, 0.3);
    border-color: var(--button-active);
    color: var(--button-active);
}

.youtube-queue-play-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.youtube-queue-play-btn:hover {
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-color: var(--button-active);
    transform: translateY(-1px);
}

.youtube-queue-play-btn.playing {
    background-color: rgba(94, 173, 164, 0.15);
    color: var(--button-active);
    border-color: var(--button-active);
}

.youtube-queue-item.active .youtube-queue-play-btn {
    background-color: var(--bg-primary);
    border-color: var(--button-active);
    color: var(--text-primary);
}

.youtube-queue-item.active .youtube-queue-play-btn.playing {
    background-color: rgba(94, 173, 164, 0.3);
    color: var(--button-active);
    border-color: var(--button-active);
}

.youtube-queue-expand-btn {
    width: 20px;
    height: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    padding: 0;
    transition: all 0.2s ease;
}

.youtube-queue-expand-btn:hover {
    color: var(--text-primary);
    border-color: var(--button-active);
    background-color: var(--button-hover);
}

/* Player Controls */
.youtube-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

.youtube-control-btn {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0;
}

.youtube-control-btn svg {
    width: 20px;
    height: 20px;
}

.youtube-control-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-sm);
}

.youtube-control-btn:active {
    transform: translateY(0);
    background-color: var(--button-active);
    color: var(--button-active-text);
    border-color: var(--button-active);
}

/* Play button playing state - match header style */
.youtube-play-btn.playing {
    background-color: var(--button-active);
    border-color: var(--button-active);
    color: #fff;
    box-shadow: 0 0 12px rgba(94, 173, 164, 0.5);
}

.youtube-play-btn.playing svg {
    stroke: #fff;
}

/* Toggle Video button - wider for text */
.youtube-toggle-video-btn {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-top: var(--spacing-xs);
}

/* Float toggle button in header */
.youtube-float-toggle-btn {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0 8px !important;
    width: auto !important;
}

/* ==================== Floating Video Player ==================== */
.youtube-float-container {
    position: fixed;
    width: 400px;
    height: 270px; /* 16:9 ratio + header */
    background-color: var(--bg-panel);
    border: 3px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px var(--shadow-lg);
    z-index: 9998;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease;
    resize: both;
    min-width: 300px;
    max-width: 800px;
    min-height: 213px; /* (300 * 225/400) + 45 */
    max-height: 495px; /* (800 * 225/400) + 45 */
}

.youtube-float-container.hidden {
    display: none;
}

.youtube-float-container.minimized {
    display: none;
}

/* Float header (draggable area) */
.youtube-float-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-panel) 100%);
    border-bottom: 1px solid var(--border-color);
    cursor: move;
    user-select: none;
    -webkit-user-select: none;
}

.youtube-float-header:active {
    cursor: grabbing;
}

.youtube-float-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 280px;
    flex: 1;
}

.youtube-float-resize-handle {
    position: fixed;
    width: 24px;
    height: 24px;
    display: none; /* Hidden until positioned */
    align-items: center;
    justify-content: center;
    background: var(--button-active);
    color: var(--text-color);
    cursor: nwse-resize;
    z-index: 10002; /* Above player container */
    opacity: 0;
    transition: opacity 0.2s ease;
    border-top-left-radius: 4px;
    pointer-events: auto;
}

.youtube-float-resize-handle.visible {
    display: flex; /* Show when positioned */
}

.youtube-float-resize-handle.show-on-hover {
    opacity: 0.8;
}

.youtube-float-resize-handle:hover {
    opacity: 1 !important;
}

.youtube-float-controls {
    display: flex;
    gap: 4px;
}

.youtube-float-btn {
    width: 24px;
    height: 24px;
    border: 1px solid var(--border-color);
    background-color: var(--button-bg);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.youtube-float-btn:hover {
    background-color: var(--button-hover);
    border-color: var(--button-active);
    transform: scale(1.1);
}

.youtube-float-btn:active {
    transform: scale(0.95);
}

#youtubeFloatClose:hover {
    background-color: #ff4444;
    border-color: #ff4444;
    color: white;
}

/* Float body (contains video) */
.youtube-float-body {
    flex: 1;
    background-color: #000;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none; /* Don't block resize handle */
    /* Player will overlay this area when in floating mode */
}

/* Resize handle (bottom-right corner) */
/* Constrain float to viewport */
.youtube-float-container.dragging {
    transition: none;
}

/* ==================== Module Controls ==================== */
.module-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.module-stats {
    margin-left: auto;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==================== Modern Filter Toolbar ==================== */
.filter-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: var(--panel-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.toggle-switch-container {
    display: flex;
    background: var(--bg-color);
    border-radius: 6px;
    padding: 2px;
    gap: 2px;
}

.toggle-action {
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.toggle-action:hover {
    background: rgba(94, 173, 164, 0.15);
    color: var(--text-primary);
}

.toggle-action:active {
    background: rgba(94, 173, 164, 0.25);
}

.filter-divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
}

.word-filter-pills {
    display: flex;
    gap: 4px;
}

.filter-pill {
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-secondary);
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 32px;
    text-align: center;
}

.filter-pill:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.filter-pill.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.filter-pill.active:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.filter-pill.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.filter-stats {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

/* Mobile responsive */
@media (max-width: 600px) {
    .filter-toolbar {
        gap: 12px;
        padding: 10px 12px;
    }
    
    .filter-stats {
        width: 100%;
        text-align: center;
        margin-left: 0;
        padding-top: 8px;
        border-top: 1px solid var(--border-color);
    }
    
    .filter-divider {
        display: none;
    }
}

/* ==================== Buttons ==================== */
.btn-primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--button-active);
    color: var(--button-active-text);
    border: 1px solid var(--button-active);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--button-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background-color: var(--button-hover);
}

/* ==================== Modules List ==================== */
.modules-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.module-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all 0.2s ease;
}

.module-item:hover {
    border-color: var(--button-active);
}

.module-item.selected {
    background-color: rgba(94, 173, 164, 0.1);
    border-color: var(--button-active);
}

.module-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
}

.module-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.module-info {
    flex: 1;
}

.module-name {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.module-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.module-meta {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    gap: var(--spacing-md);
}

.module-expand-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-md);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.module-expand-btn:hover {
    background-color: var(--button-hover);
    color: var(--text-primary);
}

.module-questions {
    display: none;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    max-height: 200px;
    overflow-y: auto;
}

.module-questions.expanded {
    display: block;
}

.question-item {
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.question-checkbox {
    width: 16px;
    height: 16px;
}

/* ==================== Hint System ==================== */
/* ==================== Clue Hint Element ==================== */
.clue-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin-left: auto;
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    font-size: 14px;
    line-height: 1;
    border-radius: 50%;
    transition: all 0.2s ease;
    opacity: 0.5;
    background: rgba(255, 193, 7, 0.08);
    color: var(--text-primary);
    padding: 0;
    border: 1px solid transparent;
}

.clue-hint::before {
    content: '💡';
}

.clue-hint:hover {
    opacity: 1;
    background-color: rgba(255, 193, 7, 0.2);
    border-color: rgba(255, 193, 7, 0.3);
    transform: scale(1.1);
}

.clue-hint:focus {
    outline: 2px solid var(--button-active);
    outline-offset: 2px;
}

/* Deprecated: kept for backwards compatibility if needed */
.hint-button {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
    margin-left: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    opacity: 0.6;
    flex-shrink: 0;
    align-self: flex-start;
}

.hint-button:hover {
    opacity: 1;
    background-color: rgba(255, 193, 7, 0.1);
    transform: scale(1.1);
}

/* ==================== Hint Modal - Minimalist Design ==================== */
.hint-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.2s ease;
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.hint-modal-content {
    background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: 16px;
    padding: var(--spacing-xl);
    max-width: 480px;
    width: 92%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(30px) scale(0.97);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.hint-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.hint-modal-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    font-family: 'Lora', serif;
}

.hint-close-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    line-height: 1;
}

.hint-close-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.hint-clue-display {
    background: rgba(94, 173, 164, 0.08);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-xl);
    font-size: 17px;
    color: var(--text-primary);
    border-left: 4px solid var(--button-active);
    line-height: 1.6;
    font-family: 'Lora', serif;
    font-style: italic;
}

.hints-list {
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.hint-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    animation: slideIn 0.3s ease;
    transition: all 0.2s ease;
}

.hint-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

@keyframes slideIn {
    from {
        transform: translateX(-10px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.hint-level-1 {
    border-left: 4px solid #4ade80;
}

.hint-level-2 {
    border-left: 4px solid #fbbf24;
}

.hint-icon {
    font-size: 28px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.hint-content {
    flex: 1;
}

.hint-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.hint-text {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 400;
    line-height: 1.6;
}

/* Combined hint styling (source + excerpt) */
.hint-source {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.hint-excerpt {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
    font-style: italic;
    padding: var(--spacing-md);
    background: rgba(94, 173, 164, 0.08);
    border-left: 3px solid var(--button-active);
    border-radius: 8px;
    margin-top: var(--spacing-sm);
    line-height: 1.7;
}

/* Word Pattern Display in Hints */
.hint-word-container {
    display: flex;
    gap: 6px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    font-family: 'Courier New', monospace;
    font-size: 28px;
    font-weight: bold;
}

/* Base styling for all hint letters */
.hint-word-container > span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 40px;
    box-sizing: border-box;
}

.hint-letter-correct {
    color: var(--text-primary);
    background-color: transparent;
}

.hint-letter-hint {
    color: #fbbf24;
    text-shadow: 0 0 10px #fbbf24, 0 0 20px rgba(251, 191, 36, 0.5);
    animation: hint-glow 1.5s ease-in-out infinite;
    font-weight: bold;
}

.hint-letter-empty {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* Selectable hint letters (clickable blanks) */
.hint-letter-selectable {
    cursor: pointer;
    color: var(--text-secondary);
    opacity: 0.7;
    transition: all 0.2s ease;
    border-radius: 4px;
    border: 2px dashed rgba(251, 191, 36, 0.4);
    background: rgba(251, 191, 36, 0.05);
}

.hint-letter-selectable:hover {
    opacity: 1;
    border-color: rgba(251, 191, 36, 0.8);
    background: rgba(251, 191, 36, 0.15);
    transform: scale(1.1);
}

.hint-letter-selectable:active {
    transform: scale(0.95);
}

.hint-letter-disabled {
    cursor: not-allowed;
    opacity: 0.3;
    border-color: rgba(128, 128, 128, 0.3);
    background: transparent;
}

.hint-letter-disabled:hover {
    transform: none;
    border-color: rgba(128, 128, 128, 0.3);
    background: transparent;
}

/* Shake animation for when limit reached */
@keyframes hint-shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}

.hint-letter-shake {
    animation: hint-shake 0.4s ease;
}

/* Selection info container */
.hint-selection-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: var(--spacing-md);
}

.hint-selection-counter {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.hint-counter-maxed {
    color: #fbbf24;
    background: rgba(251, 191, 36, 0.15);
}

.hint-letter-wrong {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.15);
    border-radius: 6px;
    padding: 4px 6px;
}

.hint-message {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: var(--spacing-lg);
    font-weight: 500;
}

/* Override margin for hint message inside selection info */
.hint-selection-info .hint-message {
    margin-top: 0;
}

@keyframes hint-glow {
    0%, 100% {
        text-shadow: 0 0 8px #fbbf24, 0 0 16px rgba(251, 191, 36, 0.6);
    }
    50% {
        text-shadow: 0 0 16px #fbbf24, 0 0 32px rgba(251, 191, 36, 0.8);
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(20px);
        opacity: 0;
    }
}

.dark-theme .hint-word-container {
    background-color: rgba(255, 255, 255, 0.03);
}

.hint-progress {
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.hint-progress-bar {
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 10px;
}

.hint-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4ade80 0%, #fbbf24 100%);
    transition: width 0.4s ease;
    border-radius: 3px;
}

.hint-progress-text {
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.hint-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.hint-actions .btn-primary,
.hint-actions .btn-secondary,
.hint-actions .btn-danger {
    padding: 14px 28px;
    font-size: 15px;
    border-radius: 10px;
    font-weight: 600;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

.hint-answer-reveal {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(145deg, rgba(94, 173, 164, 0.1) 0%, rgba(110, 231, 168, 0.08) 100%);
    border-radius: 16px;
    border: 1px solid rgba(94, 173, 164, 0.3);
    margin-top: var(--spacing-lg);
}

.hint-answer-title {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hint-answer-text {
    font-size: 36px;
    font-weight: 700;
    color: var(--button-active);
    margin-bottom: var(--spacing-xl);
    letter-spacing: 6px;
    font-family: 'Courier New', monospace;
    text-shadow: 0 2px 8px rgba(94, 173, 164, 0.3);
}

.hint-citation-reference {
    background: rgba(16, 185, 129, 0.08);
    padding: var(--spacing-lg);
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid #10b981;
    text-align: left;
}

.hint-citation-label {
    font-size: 12px;
    font-weight: 600;
    color: #10b981;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.hint-citation-text {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 400;
    line-height: 1.6;
    font-family: 'Lora', serif;
}

.hint-answer-note {
    font-size: 13px;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: var(--spacing-md);
    line-height: 1.5;
}

/* Dark theme adjustments for hints */
.dark-theme .hint-modal {
    background-color: rgba(0, 0, 0, 0.85);
}

.dark-theme .hint-answer-reveal {
    background: linear-gradient(145deg, rgba(94, 173, 164, 0.12) 0%, rgba(110, 231, 168, 0.08) 100%);
}

/* ==================== Hover Clue Tooltip ==================== */
.clue-tooltip {
    position: fixed;
    z-index: 2000;
    background: linear-gradient(135deg, rgba(30, 32, 38, 0.95) 0%, rgba(20, 22, 28, 0.98) 100%);
    border: 2px solid var(--button-active);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.4),
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    max-width: 320px;
    min-width: 200px;
    pointer-events: none;
    opacity: 0;
    transform: translateY(5px) scale(0.98);
    transition: opacity 0.25s ease, transform 0.25s ease;
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
}

.clue-tooltip.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.clue-tooltip-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.clue-tooltip-section {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    border-left: 3px solid var(--button-active);
}

.clue-tooltip-section + .clue-tooltip-section {
    margin-top: var(--spacing-xs);
}

.clue-tooltip-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    justify-content: space-between;
}

.clue-tooltip-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.clue-tooltip-hint-btn {
    background: rgba(94, 173, 164, 0.15);
    border: 1px solid rgba(94, 173, 164, 0.3);
    font-size: 16px;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    transition: all 0.2s ease;
    pointer-events: auto;
}

.clue-tooltip-hint-btn:hover {
    background: rgba(94, 173, 164, 0.3);
    border-color: var(--button-active);
    transform: scale(1.1);
}

.clue-tooltip-hint-btn:active {
    background-color: var(--button-active);
    color: white;
    transform: scale(0.95);
}

.clue-tooltip-number {
    font-size: 18px;
    font-weight: 700;
    color: var(--button-active);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.clue-tooltip-direction {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
}

.clue-tooltip-text {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    line-height: 1.4;
    font-style: italic;
}

/* Tooltip arrow/pointer indicator */
.clue-tooltip::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background: linear-gradient(135deg, var(--bg-panel) 0%, var(--bg-secondary) 100%);
    border-left: 2px solid var(--button-active);
    border-bottom: 2px solid var(--button-active);
    transform: rotate(45deg);
    z-index: -1;
}

.clue-tooltip.arrow-left::before {
    left: -8px;
    top: 16px;
    transform: rotate(45deg);
}

.clue-tooltip.arrow-right::before {
    right: -8px;
    top: 16px;
    border-left: none;
    border-bottom: none;
    border-right: 2px solid var(--button-active);
    border-top: 2px solid var(--button-active);
    transform: rotate(45deg);
}

.clue-tooltip.arrow-top::before {
    top: -8px;
    left: 50%;
    margin-left: -6px;
    border-left: none;
    border-bottom: none;
    border-right: 2px solid var(--button-active);
    border-top: 2px solid var(--button-active);
    transform: rotate(-45deg);
}

.clue-tooltip.arrow-bottom::before {
    bottom: -8px;
    left: 50%;
    margin-left: -6px;
    transform: rotate(-45deg);
}

/* Hide arrow when tooltip needs to be repositioned dynamically */
.clue-tooltip.no-arrow::before {
    display: none;
}

.dark-theme .clue-tooltip {
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.5),
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Mobile tooltip adjustments */
@media (max-width: 768px) {
    .clue-tooltip {
        max-width: calc(100vw - 24px);
        min-width: 180px;
        padding: var(--spacing-sm);
        border-radius: 10px;
    }
    
    .clue-tooltip-section {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .clue-tooltip-number {
        font-size: 16px;
    }
    
    .clue-tooltip-direction {
        font-size: 10px;
        padding: 1px 4px;
    }
    
    .clue-tooltip-text {
        font-size: 13px;
        line-height: 1.3;
    }
    
    .clue-tooltip-hint-btn {
        width: 26px;
        height: 26px;
        font-size: 14px;
    }
    
    /* Hide arrow on mobile for cleaner look */
    .clue-tooltip::before {
        display: none;
    }
}

/* Dark mode clue item styling - enhanced for new design */
.dark-theme .clue-item {
    background: rgba(255, 255, 255, 0.02);
    border-color: transparent;
}

.dark-theme .clue-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(94, 173, 164, 0.2);
}

.dark-theme .clue-item.active {
    background: rgba(94, 173, 164, 0.15);
    border-color: var(--button-active);
}

.dark-theme .clue-number {
    color: var(--button-active);
    background: rgba(94, 173, 164, 0.15);
}

.dark-theme .clue-text {
    color: var(--text-primary);
}

.dark-theme .clue-item.completed {
    opacity: 0.4;
    background: transparent;
}

.dark-theme .clue-item.completed:hover {
    opacity: 0.5;
    background: rgba(255, 255, 255, 0.02);
}

.dark-theme .clue-item.completed .clue-number {
    color: var(--success);
    background: rgba(110, 231, 168, 0.15);
}

.dark-theme .clue-item.completed .clue-text {
    color: var(--text-secondary);
}

/* ==================== Print Button ====================  */
.print-btn {
    padding: 8px 16px;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-md);
    font-weight: 500;
    transition: all 0.2s ease;
}

.print-btn:hover {
    background-color: var(--button-hover);
}

.print-btn:active {
    background-color: var(--button-active);
    color: var(--button-active-text);
}

.debug-toggle-btn {
    padding: 8px 12px;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 18px;
    transition: all 0.2s ease;
}

.debug-toggle-btn:hover {
    background-color: var(--button-hover);
}

.debug-toggle-btn:active {
    background-color: var(--button-active);
}

/* ==================== Print Styles ==================== */
.print-container {
    display: none;
    padding: 40px;
    max-width: 8.5in;
    margin: 0 auto;
    background-color: white;
    color: black;
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

/* Print media query */
@media print {
    /* Hide everything except print container */
    body {
        margin: 0;
        padding: 0;
        background: white;
        color: black;
    }

    .app-container {
        display: contents;
    }

    header,
    .header {
        display: none !important;
    }

    main,
    .main-content {
        display: none !important;
    }

    .clue-tooltip {
        display: none !important;
    }

    .debug-panel {
        display: none !important;
    }

    /* Show print container */
    .print-container {
        display: block !important;
        max-width: 100%;
        padding: 0.5in;
        margin: 0;
    }

    /* Print document - simple stacked layout for proper print rendering */
    .print-document {
        width: 8.5in;
        margin: 0 auto;
    }

    .print-section {
        page-break-after: always;
        padding: 0.5in;
        margin: 0;
    }

    .print-section:last-child {
        page-break-after: avoid;
    }

    /* Print header */
    .print-header {
        text-align: center;
        font-size: 18px;
        font-weight: bold;
        margin: 0 0 0.08in 0;
        padding-bottom: 0.06in;
        border-bottom: 1.5px solid black;
    }

    /* Print subheader (difficulty, page title) */
    .print-subheader {
        text-align: center;
        font-size: 11px;
        color: #333;
        margin: 0.04in 0;
    }

    /* Print datetime */
    .print-datetime {
        text-align: center;
        font-size: 9px;
        color: #666;
        margin: 0.04in 0 0.1in 0;
    }

    /* Print grid container */
    .print-grid-container {
        text-align: center;
        margin: 0.1in 0;
    }

    /* Print grid */
    .print-grid {
        display: inline-block;
        border-collapse: collapse;
        border: 2px solid black;
        color-adjust: exact;
        print-color-adjust: exact;
        margin: 0 auto;
    }

    .print-grid td {
        width: 0.25in;
        height: 0.25in;
        border: 1px solid black;
        padding: 0;
        text-align: center;
        vertical-align: center;
        font-size: 10px;
        font-weight: bold;
        position: relative;
        color-adjust: exact;
        print-color-adjust: exact;
    }

    .print-grid .black-cell {
        background-color: #000000 !important;
        color-adjust: exact;
        print-color-adjust: exact;
    }

    .print-grid .white-cell {
        background-color: #ffffff !important;
        color-adjust: exact;
        print-color-adjust: exact;
    }

    /* Two-column layout for clues and answers */
    .print-two-column {
        display: flex;
        gap: 0.3in;
        margin-top: 0.1in;
        font-size: 9px;
    }

    .print-column {
        flex: 1;
    }

    .print-column h3 {
        font-size: 12px;
        font-weight: bold;
        margin: 0 0 0.05in 0;
        text-decoration: underline;
    }

    /* List styles for clues and answers */
    .print-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .print-list li {
        margin-bottom: 3px;
        font-size: 12px;
        line-height: 1.2;
    }

    .print-list strong {
        font-weight: bold;
        margin-right: 2px;
    }

    /* List styles for answers with citations */
    .print-answers-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .print-answers-list li {
        margin-bottom: 4px;
        font-size: 12px;
        line-height: 1.3;
    }

    .print-answers-list strong {
        font-weight: bold;
        margin-right: 2px;
    }

    .print-answer-citation {
        display: block;
        font-size: 10px;
        color: #555;
        font-style: italic;
        margin-top: 1px;
        margin-left: 0;
        padding-left: 15px;
    }

    /* Print footer */
    .print-footer {
        text-align: center;
        padding-top: 0.08in;
        margin-top: 0.15in;
        border-top: 1px solid #999;
        font-size: 9px;
        color: #666;
    }
}

/* ==================== Celebration Effects ==================== */

/* Fireworks Overlay - appears above modal background but behind modal content */
.fireworks-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 10001;
    pointer-events: none;
    overflow: hidden;
}

/* Fireworks particles - variable sizes for more dynamic effect */
.firework {
    position: absolute;
    border-radius: 50%;
    animation: firework-burst var(--duration, 1.5s) ease-out forwards;
    box-shadow: 0 0 6px currentColor, 0 0 12px currentColor;
}

/* Small particles */
.firework.firework-sm {
    width: 4px;
    height: 4px;
}

/* Medium particles */
.firework.firework-md {
    width: 8px;
    height: 8px;
}

/* Large particles */
.firework.firework-lg {
    width: 12px;
    height: 12px;
}

/* Extra large particles for center burst */
.firework.firework-xl {
    width: 16px;
    height: 16px;
}

/* Star-shaped particles */
.firework.firework-star {
    border-radius: 0;
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    width: 14px;
    height: 14px;
}

/* Trail particles */
.firework.firework-trail {
    width: 3px;
    height: 3px;
    animation: firework-trail var(--duration, 1s) ease-out forwards;
}

@keyframes firework-burst {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0.3);
        opacity: 0;
    }
}

@keyframes firework-trail {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 0.8;
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0);
        opacity: 0;
    }
}

/* Sparkle animation for extra flair */
.firework.firework-sparkle {
    animation: firework-sparkle var(--duration, 1.2s) ease-out forwards;
}

@keyframes firework-sparkle {
    0% {
        transform: translate(0, 0) scale(1) rotate(0deg);
        opacity: 1;
    }
    50% {
        opacity: 1;
        transform: translate(calc(var(--tx) * 0.5), calc(var(--ty) * 0.5)) scale(1.2) rotate(180deg);
    }
    100% {
        transform: translate(var(--tx), var(--ty)) scale(0) rotate(360deg);
        opacity: 0;
    }
}

/* Celebration Modal */
.celebration-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(ellipse at center, rgba(102, 126, 234, 0.9) 0%, rgba(30, 30, 60, 0.95) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
    overflow: hidden;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* Confetti Container */
.confetti-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    top: -10px;
    animation: confetti-fall var(--fall-duration, 4s) linear forwards;
}

.confetti.square {
    border-radius: 2px;
}

.confetti.circle {
    border-radius: 50%;
}

.confetti.triangle {
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 10px solid var(--confetti-color);
    background: transparent !important;
}

.confetti.star {
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

@keyframes confetti-fall {
    0% {
        transform: translateY(0) rotate(0deg) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(var(--confetti-rotation, 720deg)) scale(0.5);
        opacity: 0.3;
    }
}

.celebration-modal-content {
    background: linear-gradient(145deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    padding: 40px 50px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: 
        0 25px 80px rgba(0, 0, 0, 0.4),
        0 0 60px rgba(255, 215, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transform: scale(0.5) translateY(50px);
    animation: modalSlideIn 0.7s cubic-bezier(0.175, 0.885, 0.32, 1.275) 0.2s forwards;
    position: relative;
    z-index: 2;
}

@keyframes modalSlideIn {
    to {
        transform: scale(1) translateY(0);
    }
}

/* Trophy Container */
.trophy-container {
    position: relative;
    margin-bottom: 20px;
}

.trophy {
    position: relative;
    display: inline-block;
    animation: trophyBounce 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.5s both;
}

.trophy-icon {
    font-size: 80px;
    display: block;
    filter: drop-shadow(0 4px 15px rgba(255, 215, 0, 0.5));
    animation: trophyPulse 2s ease-in-out infinite;
}

.trophy-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.4) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    animation: glowPulse 2s ease-in-out infinite;
    border-radius: 50%;
}

@keyframes trophyBounce {
    0% {
        transform: scale(0) rotate(-15deg);
        opacity: 0;
    }
    60% {
        transform: scale(1.2) rotate(5deg);
    }
    80% {
        transform: scale(0.9) rotate(-3deg);
    }
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

@keyframes trophyPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes glowPulse {
    0%, 100% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.2);
    }
}

/* Trophy Sparkles */
.trophy-sparkles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.trophy-sparkles .sparkle {
    position: absolute;
    font-size: 20px;
    animation: sparkleFloat 2s ease-in-out infinite;
}

.trophy-sparkles .sparkle:nth-child(1) { top: -10px; left: 10%; animation-delay: 0s; }
.trophy-sparkles .sparkle:nth-child(2) { top: 0; right: 10%; animation-delay: 0.3s; }
.trophy-sparkles .sparkle:nth-child(3) { top: 40%; left: -10px; animation-delay: 0.6s; }
.trophy-sparkles .sparkle:nth-child(4) { top: 40%; right: -10px; animation-delay: 0.9s; }
.trophy-sparkles .sparkle:nth-child(5) { bottom: 10px; left: 20%; animation-delay: 0.2s; }
.trophy-sparkles .sparkle:nth-child(6) { bottom: 10px; right: 20%; animation-delay: 0.5s; }

@keyframes sparkleFloat {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.8) rotate(0deg);
    }
    50% {
        opacity: 1;
        transform: scale(1.2) rotate(180deg);
    }
}

/* Animated Title Letters */
.celebration-title {
    font-size: 36px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2px;
}

.celebration-title .letter {
    display: inline-block;
    animation: letterBounce 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55) both;
    background: linear-gradient(135deg, #ffffff 0%, #ffd700 50%, #ffffff 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: letterBounce 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55) both, 
               shimmer 3s ease-in-out infinite;
}

.celebration-title .letter.space {
    width: 15px;
}

.celebration-title .letter.bounce-1 { animation-delay: 0.6s; }
.celebration-title .letter.bounce-2 { animation-delay: 0.65s; }
.celebration-title .letter.bounce-3 { animation-delay: 0.7s; }
.celebration-title .letter.bounce-4 { animation-delay: 0.75s; }
.celebration-title .letter.bounce-5 { animation-delay: 0.8s; }
.celebration-title .letter.bounce-6 { animation-delay: 0.85s; }
.celebration-title .letter.bounce-7 { animation-delay: 0.95s; }
.celebration-title .letter.bounce-8 { animation-delay: 1.0s; }
.celebration-title .letter.bounce-9 { animation-delay: 1.05s; }
.celebration-title .letter.bounce-10 { animation-delay: 1.1s; }
.celebration-title .letter.bounce-11 { animation-delay: 1.15s; }
.celebration-title .letter.bounce-12 { animation-delay: 1.2s; }
.celebration-title .letter.bounce-13 { animation-delay: 1.25s; }
.celebration-title .letter.bounce-14 { animation-delay: 1.3s; }
.celebration-title .letter.bounce-15 { animation-delay: 1.35s; }

@keyframes letterBounce {
    0% {
        transform: scale(0) translateY(-50px);
        opacity: 0;
    }
    60% {
        transform: scale(1.3) translateY(5px);
    }
    80% {
        transform: scale(0.9) translateY(-2px);
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

@keyframes shimmer {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* Subtitle */
.celebration-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 25px;
    animation: subtitleFade 0.5s ease-out 1.4s both;
}

@keyframes subtitleFade {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stats Display */
.celebration-stats {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: 30px;
    animation: statsSlideIn 0.5s ease-out 1.5s both;
}

@keyframes statsSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 15px 20px;
    border-radius: 15px;
    min-width: 90px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: transform 0.3s ease, background 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.15);
}

.stat-icon {
    font-size: 28px;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 3px;
}

.stat-value {
    font-size: 18px;
    font-weight: bold;
    color: #ffffff;
}

.stat-value.stars {
    font-size: 22px;
    animation: starsGlow 1.5s ease-in-out infinite;
}

@keyframes starsGlow {
    0%, 100% {
        filter: drop-shadow(0 0 5px rgba(255, 215, 0, 0.5));
    }
    50% {
        filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.8));
    }
}

/* Floating Emojis */
.floating-emojis {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.float-emoji {
    position: absolute;
    font-size: 30px;
    animation: emojiFloat 4s ease-in-out infinite;
    opacity: 0.7;
}

.float-emoji.emoji-1 { top: 10%; left: 10%; animation-delay: 0s; }
.float-emoji.emoji-2 { top: 20%; right: 15%; animation-delay: 0.5s; }
.float-emoji.emoji-3 { bottom: 20%; left: 15%; animation-delay: 1s; }
.float-emoji.emoji-4 { bottom: 10%; right: 10%; animation-delay: 1.5s; }
.float-emoji.emoji-5 { top: 50%; left: 5%; animation-delay: 0.8s; }

@keyframes emojiFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-15px) rotate(10deg);
    }
    50% {
        transform: translateY(-5px) rotate(-5deg);
    }
    75% {
        transform: translateY(-20px) rotate(5deg);
    }
}

/* Buttons */
.celebration-modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    animation: buttonsSlideIn 0.5s ease-out 1.7s both;
}

@keyframes buttonsSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.celebration-modal-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.celebration-modal-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.celebration-modal-btn:hover::before {
    left: 100%;
}

.celebration-modal-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.celebration-modal-btn:active {
    transform: translateY(0) scale(0.98);
}

.btn-icon {
    font-size: 20px;
}

/* Primary button variant */
.celebration-modal-btn-primary {
    background: linear-gradient(135deg, #ffd700 0%, #ffb700 100%);
    color: #1a1a2e;
}

.celebration-modal-btn-primary:hover {
    background: linear-gradient(135deg, #ffe44d 0%, #ffc933 100%);
}

/* Secondary button variant */
.celebration-modal-btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.celebration-modal-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

/* ==================== Solutions Modal ==================== */

.solutions-modal {
    z-index: 10001; /* Above celebration modal */
}

.solutions-modal.active {
    display: flex !important;
    align-items: center;
    justify-content: center;
}

.solutions-modal-content {
    max-width: 800px;
    width: 95%;
    max-height: 90vh;
    margin: 20px auto;
}

.solutions-modal-body {
    max-height: 60vh;
    overflow-y: auto;
    padding: 20px;
}

.solutions-section {
    margin-bottom: 30px;
}

.solutions-section h3 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.solutions-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.solution-item {
    padding: 15px;
    background-color: var(--bg-panel);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.solution-item:hover {
    box-shadow: 0 2px 8px var(--shadow-sm);
    border-color: var(--button-active);
}

.solution-header {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 8px;
}

.solution-number {
    font-weight: bold;
    color: var(--button-active);
    font-size: 18px;
    min-width: 30px;
}

.solution-answer {
    font-weight: bold;
    font-size: 18px;
    color: var(--text-primary);
}

.solution-clue {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
    line-height: 1.5;
}

.solution-citation {
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 5px;
    padding-left: 15px;
    border-left: 3px solid var(--border-color);
}

/* Mobile optimizations for solutions modal */
@media (max-width: 768px) {
    .solutions-modal-content {
        width: 95%;
        max-width: 95vw;
        max-height: 92vh;
        margin: 10px;
    }

    .solutions-modal-body {
        max-height: 65vh;
        padding: 12px;
    }

    .solutions-section {
        margin-bottom: 20px;
    }

    .solutions-section h3 {
        font-size: 20px;
        margin-bottom: 12px;
    }

    .solution-item {
        padding: 10px;
    }

    .solution-header {
        gap: 8px;
    }

    .solution-number {
        font-size: 15px;
        min-width: 25px;
    }

    .solution-answer {
        font-size: 15px;
    }

    .solution-clue {
        font-size: 12px;
    }

    .solution-citation {
        font-size: 11px;
        padding-left: 10px;
    }

    .celebration-modal-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .celebration-modal-btn {
        width: 100%;
        padding: 12px 25px;
        font-size: 15px;
        justify-content: center;
    }

    .celebration-modal-content {
        padding: 30px 25px;
    }

    .celebration-title {
        font-size: 24px;
    }

    .celebration-subtitle {
        font-size: 16px;
    }

    .trophy-icon {
        font-size: 60px;
    }

    .trophy-glow {
        width: 90px;
        height: 90px;
    }

    .celebration-stats {
        gap: 12px;
    }

    .stat-item {
        padding: 10px 15px;
        min-width: 75px;
    }

    .stat-icon {
        font-size: 22px;
    }

    .stat-label {
        font-size: 10px;
    }

    .stat-value {
        font-size: 15px;
    }

    .stat-value.stars {
        font-size: 18px;
    }

    .float-emoji {
        font-size: 22px;
    }
}