/**
 * Theme Manager CSS - Enhanced CSS architecture for theme system
 * Supports dynamic theming, CSS custom properties, and theme transitions
 */

/* Base CSS Custom Properties (will be overridden by themes) */
:root {
    /* Theme System Variables */
    --theme-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --theme-transition-fast: all 0.15s ease-in-out;
    --theme-transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Spacing System */
    --spacing-compact: 0.8;
    --spacing-normal: 1;
    --spacing-spacious: 1.2;
    
    /* Font System */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "Fira Code", "Monaco", "Cascadia Code", monospace;
    --font-display: "Inter Display", "Inter", -apple-system, BlinkMacSystemFont;
    
    /* Font Size System */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Border Radius System */
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-base: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadow System */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Z-index System */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* Theme-specific CSS Classes */
.theme-professional-blue {
    --theme-primary-color: #4f46e5;
    --theme-primary-hover: #4338ca;
    --theme-primary-light: #818cf8;
}

.theme-creative-purple {
    --theme-primary-color: #7c3aed;
    --theme-primary-hover: #6d28d9;
    --theme-primary-light: #a78bfa;
}

.theme-nature-green {
    --theme-primary-color: #059669;
    --theme-primary-hover: #047857;
    --theme-primary-light: #34d399;
}

.theme-sunset-orange {
    --theme-primary-color: #ea580c;
    --theme-primary-hover: #c2410c;
    --theme-primary-light: #fb923c;
}

.theme-ocean-blue {
    --theme-primary-color: #0e7490;
    --theme-primary-hover: #0c4a6e;
    --theme-primary-light: #22d3ee;
}

.theme-monochrome {
    --theme-primary-color: #374151;
    --theme-primary-hover: #1f2937;
    --theme-primary-light: #6b7280;
}

.theme-cyberpunk {
    --theme-primary-color: #ec4899;
    --theme-primary-hover: #db2777;
    --theme-primary-light: #f472b6;
    --theme-accent-color: #06b6d4;
    --theme-neon-glow: 0 0 20px rgba(236, 72, 153, 0.5);
}

.theme-retro {
    --theme-primary-color: #dc2626;
    --theme-primary-hover: #b91c1c;
    --theme-primary-light: #ef4444;
    --theme-accent-color: #fbbf24;
}

/* Category-specific adjustments */
.theme-category-professional {
    --theme-font-weight: 500;
    --theme-border-radius: var(--radius-base);
}

.theme-category-creative {
    --theme-font-weight: 600;
    --theme-border-radius: var(--radius-lg);
}

.theme-category-nature {
    --theme-font-weight: 400;
    --theme-border-radius: var(--radius-md);
}

.theme-category-minimal {
    --theme-font-weight: 300;
    --theme-border-radius: var(--radius-sm);
}

.theme-category-futuristic {
    --theme-font-weight: 700;
    --theme-border-radius: var(--radius-none);
}

.theme-category-vintage {
    --theme-font-weight: 500;
    --theme-border-radius: var(--radius-base);
}

/* Dark Mode Theme Overrides */
body.dark-mode {
    --theme-primary-color: var(--primary-color);
    --theme-primary-hover: var(--primary-hover);
    --theme-primary-light: var(--primary-light);
    --theme-background-color: var(--background-color);
    --theme-surface-color: var(--surface-color);
    --theme-text-color: var(--text-color);
    --theme-text-secondary: var(--text-secondary);
    --theme-border-color: var(--border-color);
}

/* Theme Transition Effects */
* {
    transition: background-color var(--theme-transition),
                color var(--theme-transition),
                border-color var(--theme-transition),
                box-shadow var(--theme-transition);
}

/* Theme-aware Component Styles */
.theme-aware-component {
    background-color: var(--surface-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--theme-border-radius);
    transition: var(--theme-transition);
}

.theme-aware-component:hover {
    background-color: var(--background-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-base);
}

.theme-aware-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--theme-border-radius);
    font-weight: var(--theme-font-weight);
    transition: var(--theme-transition);
}

.theme-aware-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.theme-aware-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Theme Selector Styles */
.theme-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: var(--z-dropdown);
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    min-width: 300px;
    max-height: 80vh;
    overflow-y: auto;
}

.theme-selector-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.theme-selector-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
}

.theme-selector-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-base);
    transition: var(--theme-transition-fast);
}

.theme-selector-close:hover {
    background-color: var(--background-color);
    color: var(--text-color);
}

.theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.theme-card {
    position: relative;
    cursor: pointer;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--theme-transition);
    border: 2px solid transparent;
}

.theme-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.theme-card.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.theme-preview {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: white;
    position: relative;
    overflow: hidden;
}

.theme-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    z-index: -1;
}

.theme-info {
    padding: 0.5rem;
    background: var(--surface-color);
}

.theme-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.theme-category {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Recent Themes Section */
.recent-themes {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.recent-themes-title {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 0.75rem 0;
}

.recent-themes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.recent-themes-grid .theme-card {
    min-width: auto;
    padding: 0.5rem;
}

.recent-themes-grid .theme-preview {
    height: 30px;
    margin-bottom: 0.25rem;
}

.recent-themes-grid .theme-name {
    font-size: var(--font-size-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: var(--z-fixed);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: var(--theme-transition);
}

.theme-toggle:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

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

/* Mode Toggle Button (Light/Dark Mode) - Separate from Theme Editor */
.mode-toggle {
    position: fixed;
    bottom: 20px;
    right: 80px; /* Positioned to the left of theme toggle */
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--surface-color);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--theme-transition);
}

.mode-toggle:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

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

.mode-toggle svg {
    width: 20px;
    height: 20px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .mode-toggle {
        bottom: 80px;
        right: 80px;
        width: 44px;
        height: 44px;
    }
}

/* Custom Theme Panel */
.custom-theme-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
}

.custom-theme-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.color-picker-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.color-picker-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.color-picker-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-picker-preview {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-base);
    border: 2px solid var(--border-color);
    cursor: pointer;
}

.color-picker-value {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-base);
    background: var(--background-color);
    color: var(--text-color);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
}

/* Template Browser Styles */
.template-browser {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    max-height: 80vh;
    overflow-y: auto;
}

.template-browser-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.template-browser-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
}

.template-search {
    position: relative;
    flex: 1;
    max-width: 300px;
    margin-left: 1rem;
}

.template-search-input {
    width: 100%;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-base);
    background: var(--background-color);
    color: var(--text-color);
    font-size: var(--font-size-sm);
}

.template-search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.template-categories {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.template-category {
    padding: 0.25rem 0.75rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--theme-transition-fast);
}

.template-category:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.template-category.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.template-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    cursor: pointer;
    transition: var(--theme-transition);
}

.template-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-base);
    transform: translateY(-1px);
}

.template-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.75rem;
}

.template-name {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-color);
}

.template-category-badge {
    padding: 0.125rem 0.5rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.template-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.template-tags {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.template-tag {
    padding: 0.125rem 0.375rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .theme-selector {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
        max-height: 100vh;
        border-radius: 0;
    }
    
    .theme-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .template-browser {
        padding: 1rem;
    }
    
    .template-browser-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .template-search {
        max-width: none;
        margin-left: 0;
    }
    
    .template-grid {
        grid-template-columns: 1fr;
    }
}

/* Animation Classes */
.theme-transition-enter {
    opacity: 0;
    transform: scale(0.95);
}

.theme-transition-enter-active {
    opacity: 1;
    transform: scale(1);
    transition: var(--theme-transition);
}

.theme-transition-exit {
    opacity: 1;
    transform: scale(1);
}

.theme-transition-exit-active {
    opacity: 0;
    transform: scale(0.95);
    transition: var(--theme-transition);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
    
    .theme-card:hover,
    .template-card:hover,
    .theme-toggle:hover {
        transform: none !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .theme-card,
    .template-card {
        border-width: 2px;
    }
    
    .theme-toggle {
        border: 2px solid currentColor;
    }
}