/**
 * ============================================================================
 * CHAHUA DATABASE MANAGER - THEME SYSTEM
 * ============================================================================
 * 
 * @fileoverview Theme-specific CSS variable overrides
 * @author Chahua Development Thailand
 * @version 1.0.0
 * 
 * @description
 * This file provides theme variations by overriding CSS custom properties.
 * Themes include:
 * - Light theme (.theme-light)
 * - Dark theme (.theme-dark) - default in app.css
 * - High contrast theme (.theme-high-contrast)
 * - Blue theme (.theme-blue)
 * 
 * @usage
 * Apply theme class to body element:
 * document.body.className = 'theme-light';
 * 
 * @dependencies
 * - app.css (base CSS variables defined in :root)
 * 
 * @note
 * Z-index values and layout properties remain consistent across themes.
 * Only colors, fonts, and visual appearance change.
 * 
 * @customization
 * To add new themes:
 * 1. Create new .theme-{name} class
 * 2. Override desired CSS custom properties
 * 3. Test with all components (especially modals, tooltips)
 * 4. Update theme selector in JavaScript
 */

/* ============================================================================
   LIGHT THEME
   ============================================================================
   
   @theme Light Theme
   @description Clean light theme for better visibility in bright environments
   @accessibility Higher contrast ratios for better readability
   ============================================================================ */

.theme-light {
    /* @colors Light theme color palette */
    --bg-primary: #ffffff;      /* Pure white background */
    --bg-secondary: #f8f9fa;    /* Light gray secondary background */
    --bg-tertiary: #e9ecef;     /* Medium gray tertiary background */
    --bg-hover: #dee2e6;        /* Light gray hover state */
    
    /* @colors Light theme text colors */
    --text-primary: #212529;    /* Dark gray primary text */
    --text-secondary: #495057;  /* Medium gray secondary text */
    --text-muted: #6c757d;      /* Light gray muted text */
    --border-color: #dee2e6;    /* Light gray borders */
}

/* ============================================================================
   DARK THEME (DEFAULT)
   ============================================================================
   
   @theme Dark Theme
   @description Default theme - variables already defined in app.css :root
   @note No overrides needed, inherits from :root
   @usage Body element without theme class uses dark theme by default
   ============================================================================ */

/* Dark theme is the default - no class needed, inherits from :root */

/* ============================================================================
   HIGH CONTRAST THEME
   ============================================================================
   
   @theme High Contrast Theme
   @description Maximum contrast for accessibility and low vision users
   @accessibility WCAG AA compliant contrast ratios
   ============================================================================ */

.theme-high-contrast {
    /* @colors High contrast color palette */
    --bg-primary: #000000;      /* Pure black background */
    --bg-secondary: #1a1a1a;    /* Very dark gray secondary */
    --bg-tertiary: #333333;     /* Dark gray tertiary */
    --bg-hover: #4d4d4d;        /* Medium gray hover state */
    
    /* @colors High contrast text colors */
    --text-primary: #ffffff;    /* Pure white text */
    --text-secondary: #cccccc;  /* Light gray secondary text */
    --text-muted: #999999;      /* Medium gray muted text */
    --border-color: #666666;    /* Medium gray borders */
    
    /* @colors High contrast accent colors */
    --accent-primary: #00ffff;  /* Bright cyan accent */
    --accent-hover: #00cccc;    /* Darker cyan hover */
}

/* Blue Theme */
.theme-blue {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --accent-primary: #58a6ff;
    --accent-hover: #4493f8;
}

/* Green Theme */
.theme-green {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --accent-primary: #3fb950;
    --accent-hover: #2ea043;
    --success-color: #238636;
}

/* Purple Theme */
.theme-purple {
    --bg-primary: #0d0d0d;
    --bg-secondary: #1a0d1a;
    --bg-tertiary: #2d1a2d;
    --bg-hover: #3d2a3d;
    --text-primary: #e6d9e6;
    --text-secondary: #b399b3;
    --text-muted: #8c6b8c;
    --border-color: #3d2a3d;
    --accent-primary: #a855f7;
    --accent-hover: #9333ea;
}

/* Theme Switcher */
.theme-switcher {
    position: relative;
}

.theme-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xs) 0;
    min-width: 150px;
    z-index: 1000;
    display: none;
}

.theme-menu.active {
    display: block;
}

.theme-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.theme-option:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.theme-option.active {
    background-color: var(--accent-primary);
    color: white;
}

.theme-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

.theme-color.dark {
    background: linear-gradient(45deg, #1e1e1e, #2d2d30);
}

.theme-color.light {
    background: linear-gradient(45deg, #ffffff, #f8f9fa);
}

.theme-color.blue {
    background: linear-gradient(45deg, #0d1117, #58a6ff);
}

.theme-color.green {
    background: linear-gradient(45deg, #0d1117, #3fb950);
}

.theme-color.purple {
    background: linear-gradient(45deg, #0d0d0d, #a855f7);
}

.theme-color.high-contrast {
    background: linear-gradient(45deg, #000000, #00ffff);
}

/* Database Type Icons */
.db-icon {
    width: 16px;
    height: 16px;
    display: inline-block;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.db-icon.postgresql {
    background-image: url('data:image/svg+xml;base64,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');
}

.db-icon.mysql {
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQiIGhlaWdodD0iMjQiIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0iIzAwNzU4ZiI+PHBhdGggZD0iTTEyIDJDNi40OSAyIDIgNi40OSAyIDEyczQuNDkgMTAgMTAgMTAgMTAtNC40OSAxMC0xMFMxNy41MSAyIDEyIDJ6bTMuNSAxMy4zOGMtLjU1IDAtMSAuNDUtMSAxczQ1IDEgMSAxIDEtLjQ1IDEtMXptLTcgMGMtLjU1IDAtMSAuNDUtMSAxczQ1IDEgMSAxIDEtLjQ1IDEtMXptMC03YzAtLjU1LjQ1LTEgMS0xaDFjLjU1IDAgMSAuNDUgMSAxdjJjMCAuNTUtLjQ1IDEtMSAxSDkuNWMtLjU1IDAtMS0uNDUtMS0xVjguMzh6Ii8+PC9zdmc+');
}

.db-icon.sqlite {
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQiIGhlaWdodD0iMjQiIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0iIzAwNzU4ZiI+PHBhdGggZD0iTTEyIDJjNS41MiAwIDEwIDQuNDggMTAgMTBzLTQuNDggMTAtMTAgMTBTMiAxNy41MiAyIDEyIDYuNDggMiAxMiAyem0wIDE4YzQuNDEgMCA4LTMuNTkgOC04cy0zLjU5LTgtOC04LTggMy41OS04IDggMy41OSA4IDggOHptLTUtOUg5djEuNUg3VjEyaDJWMTBoMnYyek0xNSAxMGgydjEuNWgtMlYxMmgyVjEwaDJ2eiIvPjwvc3ZnPg==');
}

.db-icon.mongodb {
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQiIGhlaWdodD0iMjQiIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0iIzQ3QTI0OCI+PHBhdGggZD0iTTEyIDEuMjkzYy0uNzYgMC0xLjUxMy4xODUtMi4yMDMuNTMzTDQuNzYgNi4zOTJjLS45NTUuNTQtMS41NiAxLjU1Ni0xLjU2IDIuNjY3djUuODgyYzAgMS4xMS42MDUgMi4xMjcgMS41NiAyLjY2N2w1LjAzNyA0LjU2NmMuNjkuMzQ4IDEuNDQzLjUzMyAyLjIwMy41MzNzMS41MTMtLjE4NSAyLjIwMy0uNTMzbDUuMDM3LTQuNTY2Yy45NTUtLjU0IDEuNTYtMS41NTcgMS41Ni0yLjY2N1Y5LjA1OWMwLTEuMTExLS42MDUtMi4xMjctMS41Ni0yLjY2N2wtNS4wMzctNC41NjZjLS42OS0uMzQ4LTEuNDQzLS41MzMtMi4yMDMtLjUzM3oiLz48L3N2Zz4=');
}

.db-icon.redis {
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQiIGhlaWdodD0iMjQiIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0iI0RDMzgyRCI+PHBhdGggZD0iTTEyIDJMMjAuNSA2djEybC04LjUgNEwzLjUgMThWNkwxMiAyeiIvPjwvc3ZnPg==');
}

/* Connection Status Colors */
.status-connected {
    color: var(--success-color);
}

.status-connecting {
    color: var(--warning-color);
}

.status-disconnected {
    color: var(--error-color);
}

.status-error {
    color: var(--error-color);
}

/* Syntax Highlighting Themes */
.theme-light .sql-keyword {
    color: #0000ff;
}

.theme-light .sql-string {
    color: #008000;
}

.theme-light .sql-comment {
    color: #808080;
}

.theme-light .sql-number {
    color: #ff8c00;
}

.theme-dark .sql-keyword {
    color: #569cd6;
}

.theme-dark .sql-string {
    color: #ce9178;
}

.theme-dark .sql-comment {
    color: #6a9955;
}

.theme-dark .sql-number {
    color: #b5cea8;
}

.theme-blue .sql-keyword {
    color: #58a6ff;
}

.theme-blue .sql-string {
    color: #79c0ff;
}

.theme-blue .sql-comment {
    color: #8b949e;
}

.theme-blue .sql-number {
    color: #79c0ff;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

.fade-out {
    animation: fadeOut 0.3s ease-out;
}

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

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

.slide-up {
    animation: slideUp 0.3s ease-out;
}

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

.bounce {
    animation: bounce 0.6s ease-in-out;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Print Styles */
@media print {
    .app-header,
    .sidebar,
    .tab-bar,
    .editor-toolbar,
    .results-header,
    .modal,
    .toast-container {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .data-table {
        border-collapse: collapse;
        width: 100%;
    }
    
    .data-table th,
    .data-table td {
        border: 1px solid black;
        padding: 4px;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-high-contrast: high) {
    :root {
        --border-color: #ffffff;
        --text-muted: #cccccc;
    }
}

/* Focus Indicators */
.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.tree-item:focus-visible,
.tab-item:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: -2px;
}