/* === WHATSAPP DARK MODE DESIGN SYSTEM === */
:root {
    /* WhatsApp Official Colors (Dark Mode) */
    --wa-primary: #005C4B;
    --wa-primary-dark: #00453A;
    --wa-primary-light: #008069;
    --wa-secondary: #1F2C34;
    --wa-accent-green: #00A884;
    --wa-accent-blue: #53BDEB;
    --wa-accent-yellow: #FFC107;
    --wa-accent-red: #F44336;
    
    /* Surface & Background */
    --wa-background: #111B21;
    --wa-surface: #202C33;
    --wa-surface-secondary: #182229;
    --wa-surface-elevated: #2A3942;
    
    /* Text Colors */
    --wa-text-primary: #E9EDEF;
    --wa-text-secondary: #8696A0;
    --wa-text-tertiary: #667781;
    --wa-text-on-primary: #FFFFFF;
    
    /* Status Colors */
    --wa-status-online: #00A884;
    --wa-status-typing: #009688;
    --wa-status-offline: #667781;
    
    /* Message Status */
    --wa-message-sent: #8696A0;
    --wa-message-delivered: #53BDEB;
    --wa-message-read: #34B7F1;
    
    /* Borders & Dividers */
    --wa-border: #2A3942;
    --wa-border-light: #222E35;
    --wa-border-dark: #374149;
    
    /* Shadows (Dark mode adjustments) */
    --wa-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --wa-shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
    --wa-shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
    --wa-shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.6);
}

/* === DARK MODE OVERRIDES === */
body {
    background-color: var(--wa-background);
    color: var(--wa-text-primary);
}

/* Status Bar */
.status-bar {
    background-color: var(--wa-background);
}

/* Splash Screen (Dark variant) */
.splash-screen {
    background: linear-gradient(135deg, var(--wa-background), #0C151B);
}

/* PWA Install Prompt */
.pwa-card {
    background: var(--wa-surface);
    border-color: var(--wa-border);
}

.pwa-details p {
    color: var(--wa-text-secondary);
}

.pwa-secondary {
    background: var(--wa-surface-secondary);
    color: var(--wa-text-secondary);
}

.pwa-secondary:hover {
    background: var(--wa-border);
}

.pwa-close:hover {
    background: var(--wa-border);
    color: var(--wa-text-secondary);
}

/* Network Status */
.network-status {
    background: #4D3814;
    color: var(--wa-accent-yellow);
}

/* Selection Toolbar */
.selection-toolbar {
    background: var(--wa-surface);
    border-color: var(--wa-border);
}

.selection-count {
    color: var(--wa-text-primary);
}

.selection-btn {
    background: var(--wa-surface-secondary);
    border-color: var(--wa-border-dark);
    color: var(--wa-text-secondary);
}

.selection-btn:hover {
    background: var(--wa-border);
    color: var(--wa-text-primary);
}

/* FAB Menu */
.fab-menu {
    background: var(--wa-surface);
    border-color: var(--wa-border);
}

.fab-menu-item {
    color: var(--wa-text-primary);
}

.fab-menu-item:hover {
    background: var(--wa-border);
}

/* Search Overlay */
.search-overlay {
    background: var(--wa-background);
}

.search-header {
    background: var(--wa-background);
    border-color: var(--wa-border);
}

.search-back:hover {
    background: var(--wa-border);
}

.search-input {
    background: var(--wa-surface);
    border-color: var(--wa-border-dark);
    color: var(--wa-text-primary);
}

.search-input:focus {
    border-color: var(--wa-primary-light);
    background: var(--wa-surface-secondary);
}

.search-clear:hover {
    background: var(--wa-border);
    color: var(--wa-text-secondary);
}

/* Scrollbar Dark Mode */
::-webkit-scrollbar-thumb {
    background: var(--wa-border-dark);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--wa-text-tertiary);
}

/* === DARK MODE UTILITY CLASSES === */
.dark\:bg-surface { background: var(--wa-surface); }
.dark\:bg-secondary { background: var(--wa-surface-secondary); }
.dark\:text-primary { color: var(--wa-text-primary); }
.dark\:text-secondary { color: var(--wa-text-secondary); }
.dark\:border { border-color: var(--wa-border); }

/* === PREFERS-REDUCED-MOTION === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .splash-screen {
        animation: none;
    }
    
    .splash-logo {
        animation: none;
    }
    
    .splash-progress-bar {
        animation: none;
        width: 100%;
    }
}

/* === HIGH CONTRAST MODE === */
@media (prefers-contrast: high) {
    :root {
        --wa-primary: #00664C;
        --wa-accent-green: #008F5C;
        --wa-accent-blue: #0080CC;
        --wa-text-primary: #000000;
        --wa-text-secondary: #333333;
    }
    
    body {
        -webkit-font-smoothing: none;
        -moz-osx-font-smoothing: grayscale;
    }
    
    .splash-screen {
        background: var(--wa-primary);
    }
    
    .pwa-card,
    .fab-menu,
    .selection-toolbar {
        border: 2px solid currentColor;
    }
}

/* === FORCED COLORS MODE (Windows High Contrast) === */
@media (forced-colors: active) {
    :root {
        --wa-primary: CanvasText;
        --wa-background: Canvas;
        --wa-surface: Canvas;
        --wa-text-primary: CanvasText;
        --wa-border: CanvasText;
    }
    
    .splash-screen {
        background: Canvas;
    }
    
    .splash-text {
        color: CanvasText;
    }
    
    .splash-progress {
        background: CanvasText;
        opacity: 0.2;
    }
    
    .splash-progress-bar {
        background: CanvasText;
    }
    
    .status-bar {
        background: Canvas;
        border-bottom: 1px solid CanvasText;
    }
    
    .pwa-card,
    .fab-menu,
    .selection-toolbar {
        border: 1px solid CanvasText;
        forced-color-adjust: none;
    }
    
    .pwa-primary,
    .selection-btn,
    .fab-menu-item {
        border: 1px solid CanvasText;
        forced-color-adjust: none;
    }
}

/* === DARK MODE TRANSITIONS === */
@media (prefers-color-scheme: dark) {
    body {
        transition: background-color 0.3s ease, color 0.3s ease;
    }
    
    .app-container {
        transition: background-color 0.3s ease;
    }
    
    wa-header,
    wa-bottom-nav,
    wa-sidebar,
    wa-chat-list,
    wa-status-list,
    wa-calls-list {
        transition: background-color 0.3s ease, color 0.3s ease;
    }
}

/* === DARK MODE PRINT OPTIMIZATION === */
@media print and (prefers-color-scheme: dark) {
    body {
        background: white !important;
        color: black !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    
    * {
        background: white !important;
        color: black !important;
        border-color: black !important;
    }
}