/* Dark Mode CSS Variables and Styling */

/* Light theme (default) */
:root {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f5f5f5;
    --bg-modal: rgba(0, 0, 0, 0.5);

    --text-primary: #333;
    --text-secondary: #666;
    --text-header: #1a1a1a;
    --text-success: #4caf50;

    --border-default: #e0e0e0;
    --border-hover: #999;
    --border-focus: #2196f3;

    --button-bg: #ffffff;
    --button-hover-bg: #f9f9f9;
    --button-selected-bg: #e3f2fd;
    --button-paired-bg: #f0f0f0;
    --button-error-bg: #ffebee;

    --primary-color: #2196f3;
    --primary-hover: #1976d2;
    --error-color: #f44336;

    /* Deep dive mini-game variables */
    --card-bg: #ffffff;
    --card-border: #e0e0e0;
    --selected-bg: #e3f2fd;
    --selected-border: #2196f3;
    --success-bg: #e8f5e9;
    --success-color: #4caf50;

    --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.3);

    /* Category background colors (subtle tints) */
    --category-bg-0: #e3f2fd;
    --category-bg-1: #fff8e1;
    --category-bg-2: #e8f5e9;
    --category-bg-3: #f3e5f5;
    --category-bg-4: #fbe9e7;
    --category-bg-5: #e0f7fa;
    --category-bg-6: #fce4ec;
    --category-bg-7: #f1f8e9;
    --category-bg-8: #fff3e0;
    --category-bg-9: #ede7f6;
}

/* Dark theme */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --bg-modal: rgba(0, 0, 0, 0.8);

    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-header: #ffffff;
    --text-success: #66bb6a;

    --border-default: #404040;
    --border-hover: #666666;
    --border-focus: #42a5f5;

    --button-bg: #2d2d2d;
    --button-hover-bg: #353535;
    --button-selected-bg: #1e3a5f;
    --button-paired-bg: #3a3a3a;
    --button-error-bg: #4a2020;

    --primary-color: #42a5f5;
    --primary-hover: #1e88e5;
    --error-color: #ef5350;

    /* Deep dive mini-game variables */
    --card-bg: #2d2d2d;
    --card-border: #404040;
    --selected-bg: #1e3a5f;
    --selected-border: #42a5f5;
    --success-bg: #1b4d1b;
    --success-color: #66bb6a;

    --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.6);

    /* Category background colors (darker tints) */
    --category-bg-0: #1a2530;
    --category-bg-1: #2e2a1a;
    --category-bg-2: #1a2e1f;
    --category-bg-3: #2a1e2e;
    --category-bg-4: #2e221e;
    --category-bg-5: #1a2a2e;
    --category-bg-6: #2e1e25;
    --category-bg-7: #252e1e;
    --category-bg-8: #2e261a;
    --category-bg-9: #251e2e;
}

/* Apply theme variables to elements */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Category background colors */
body.category-bg-0 { background-color: var(--category-bg-0); }
body.category-bg-1 { background-color: var(--category-bg-1); }
body.category-bg-2 { background-color: var(--category-bg-2); }
body.category-bg-3 { background-color: var(--category-bg-3); }
body.category-bg-4 { background-color: var(--category-bg-4); }
body.category-bg-5 { background-color: var(--category-bg-5); }
body.category-bg-6 { background-color: var(--category-bg-6); }
body.category-bg-7 { background-color: var(--category-bg-7); }
body.category-bg-8 { background-color: var(--category-bg-8); }
body.category-bg-9 { background-color: var(--category-bg-9); }

header h1 {
    color: var(--text-header);
}

header .date {
    color: var(--text-secondary);
}

.instructions p,
.instructions h2 {
    color: var(--text-header);
}

/* Word Button */
.word-button {
    background-color: var(--button-bg);
    border-color: var(--border-default);
    color: var(--text-primary);
}

.word-button:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-sm);
}

.word-button.selected {
    background-color: var(--button-selected-bg);
    border-color: var(--border-focus);
}

.word-button.paired {
    background-color: var(--button-paired-bg);
}

.word-button.shake {
    background-color: var(--button-error-bg) !important;
    border-color: var(--error-color) !important;
}

/* Notification */
.notification {
    background-color: var(--bg-modal);
}

.notification-content {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

.notification-content h2 {
    color: var(--text-success);
}

.notification-content p {
    color: var(--text-header);
}

.notification-subtitle {
    color: var(--text-secondary) !important;
}

/* Victory Screen */
#victory-screen {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-md);
}

#victory-screen h2 {
    color: var(--text-success);
}

#victory-screen #share-display {
    background-color: var(--bg-tertiary);
    border-color: var(--border-default);
    color: var(--text-primary);
}

#victory-screen button {
    background-color: var(--primary-color);
}

#victory-screen button:hover {
    background-color: var(--primary-hover);
}

#share-copy-feedback {
    color: var(--text-success);
}

/* Error Screen */
#error-screen {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-md);
}

#error-screen button {
    background-color: var(--primary-color);
}

#error-screen button:hover {
    background-color: var(--primary-hover);
}

/* Modal */
.modal {
    background-color: var(--bg-modal);
}

.modal-content {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

.modal-content textarea {
    background-color: var(--bg-tertiary);
    border-color: var(--border-default);
    color: var(--text-primary);
}

.modal-buttons button {
    background-color: var(--primary-color);
}

.modal-buttons button:hover {
    background-color: var(--primary-hover);
}

#copy-feedback {
    color: var(--text-success);
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border-default);
    background-color: var(--button-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.2s ease;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.theme-toggle:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.theme-toggle::before {
    content: '☀️';
}

[data-theme="dark"] .theme-toggle::before {
    content: '🌙';
}

/* Audio Toggle Button */
.audio-toggle {
    position: fixed;
    top: 74px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border-default);
    background-color: var(--button-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transition: all 0.2s ease;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.audio-toggle:hover {
    border-color: var(--border-hover);
    transform: scale(1.05);
}

.audio-toggle:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.audio-toggle::before {
    content: '🔊';
}

.audio-toggle.muted::before {
    content: '🔇';
}

.audio-toggle.music-toggle::before {
    content: '🎵';
}

.audio-toggle.sfx-toggle::before {
    content: '🔊';
}

.audio-toggle.music-toggle.muted::before {
    content: '🎵';
    opacity: 0.35;
    filter: grayscale(100%);
}

.audio-toggle.sfx-toggle.muted::before {
    content: '🔇';
}

.audio-toggle.music-toggle {
    right: 100px;
}

.audio-toggle.sfx-toggle {
    right: 55px;
}

/* Secondary Button */
.secondary-button {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-default);
}

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

/* Smooth transitions for theme changes */
body,
.word-button,
.theme-toggle,
.audio-toggle,
.notification-content,
#victory-screen,
#error-screen,
.modal-content {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .theme-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 1.3rem;
    }

    .audio-toggle {
        top: 58px;
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .audio-toggle.music-toggle {
        right: 58px;
    }

    .audio-toggle.sfx-toggle {
        right: 10px;
    }
}