/* Theme System CSS Variables and Styles */

:root {
    /* Default Light Theme Colors */
    --primary-color: #8B4513;
    --primary-dark: #654321;
    --primary-light: #A0522D;
    --secondary-color: #D2691E;
    --background-color: #FFFFFF;
    --surface-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --text-color: #212529;
    --text-secondary: #6C757D;
    --border-color: #DEE2E6;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #28A745;
    --warning-color: #FFC107;
    --error-color: #DC3545;
    --info-color: #17A2B8;
    
    /* Font scaling */
    --font-scale: 1.0;
    
    /* Transition duration (can be overridden to disable animations) */
    --transition-duration: 0.3s;
}

/* Base theme transitions */
* {
    transition: 
        background-color var(--transition-duration, 0.3s) ease,
        color var(--transition-duration, 0.3s) ease,
        border-color var(--transition-duration, 0.3s) ease,
        box-shadow var(--transition-duration, 0.3s) ease;
}

/* Body and background theming */
body {
    background-color: var(--background-color);
    color: var(--text-color);
}

/* Theme-specific styles */
.theme-light {
    color-scheme: light;
}

.theme-dark {
    color-scheme: dark;
}

.theme-coffee {
    color-scheme: light;
}

.theme-sepia {
    color-scheme: light;
}

/* Dark theme specific adjustments */
.theme-dark img {
    opacity: 0.9;
}

.theme-dark .navbar {
    border-bottom: 1px solid var(--border-color);
}

.theme-dark input,
.theme-dark textarea,
.theme-dark select {
    background-color: var(--surface-color);
    color: var(--text-color);
    border-color: var(--border-color);
}

.theme-dark input:focus,
.theme-dark textarea:focus,
.theme-dark select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(210, 105, 30, 0.25);
}

/* Coffee theme specific adjustments */
.theme-coffee {
    font-family: 'Georgia', 'Times New Roman', serif;
}

.theme-coffee .navbar {
    border-bottom: 2px solid var(--primary-color);
}

.theme-coffee .btn-primary {
    box-shadow: 0 4px 8px var(--shadow-color);
}

.theme-coffee .product-card:hover {
    transform: translateY(-3px);
}

/* Sepia theme specific adjustments */
.theme-sepia {
    font-family: 'Book Antiqua', 'Palatino', serif;
}

.theme-sepia img {
    filter: sepia(20%) saturate(0.8);
}

.theme-sepia .product-card {
    border: 1px solid var(--border-color);
}

/* High contrast improvements for accessibility */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow-color: rgba(0, 0, 0, 0.5);
    }
    
    .theme-dark {
        --border-color: #FFFFFF;
    }
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
    
    :root {
        --transition-duration: 0s;
    }
}

/* Font size scaling system */
html {
    font-size: calc(16px * var(--font-scale, 1.0));
}

/* Responsive font scaling adjustments */
@media (max-width: 768px) {
    html {
        font-size: calc(14px * var(--font-scale, 1.0));
    }
}

@media (max-width: 480px) {
    html {
        font-size: calc(13px * var(--font-scale, 1.0));
    }
}

/* Theme-aware scrollbar styling */
.theme-dark ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.theme-dark ::-webkit-scrollbar-track {
    background: var(--surface-color);
}

.theme-dark ::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.theme-dark ::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Print styles - always use light theme */
@media print {
    * {
        background-color: white !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .theme-controls {
        display: none !important;
    }
}

/* Focus styles for better keyboard navigation */
button:focus,
input:focus,
textarea:focus,
select:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Theme-specific button styles */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

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

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: white;
}

.btn-danger {
    background-color: var(--error-color);
    border-color: var(--error-color);
    color: white;
}

/* Card and surface theming */
.card,
.product-card,
.order-card,
.review-card,
.wishlist-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

/* Navigation theming */
.navbar {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.nav-menu a {
    color: var(--text-color);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

/* Form theming */
input,
textarea,
select {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(139, 69, 19, 0.25);
}

.theme-dark input:focus,
.theme-dark textarea:focus,
.theme-dark select:focus {
    box-shadow: 0 0 0 0.2rem rgba(210, 105, 30, 0.25);
}

/* Alert and notification theming */
.alert-success {
    background-color: var(--success-color);
    color: white;
}

.alert-warning {
    background-color: var(--warning-color);
    color: white;
}

.alert-danger {
    background-color: var(--error-color);
    color: white;
}

.alert-info {
    background-color: var(--info-color);
    color: white;
}

/* Loading and skeleton theming */
.loading {
    color: var(--text-secondary);
}

.skeleton {
    background: linear-gradient(90deg, 
        var(--surface-color) 25%, 
        var(--border-color) 50%, 
        var(--surface-color) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Custom theme preview colors for theme selector */
.light-preview {
    background: linear-gradient(45deg, #FFFFFF 50%, #F8F9FA 50%);
    border: 1px solid #DEE2E6;
}

.dark-preview {
    background: linear-gradient(45deg, #121212 50%, #2D2D2D 50%);
    border: 1px solid #404040;
}

.coffee-preview {
    background: linear-gradient(45deg, #6F4E37 50%, #A0522D 50%);
    border: 1px solid #8D6E63;
}

.sepia-preview {
    background: linear-gradient(45deg, #F4F1E8 50%, #8B4513 50%);
    border: 1px solid #D4C4B0;
}