/* CSS Variables - Light Theme */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --header-height: 4rem;
    --max-width: 1400px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-light: #1e293b;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 2rem;
    }
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
}

.nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.nav-menu li {
    margin: 0.5rem 0;
}

.nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle,
.search-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover,
.search-toggle:hover {
    background-color: var(--bg-secondary);
}

/* Desktop Navigation */
@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-menu {
        position: static;
        display: flex;
        gap: 0.5rem;
        padding: 0;
        transform: none;
        opacity: 1;
        visibility: visible;
        border: none;
        background: transparent;
    }
    
    .nav-menu li {
        margin: 0;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
    }
}

/* Search Overlay */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 20vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.search-overlay.active {
    opacity: 1;
    visibility: visible;
}

.search-container {
    width: 90%;
    max-width: 600px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 1rem 3rem 1rem 1.5rem;
    font-size: 1.125rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--primary-color);
}

.search-close {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.search-close:hover {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.search-results {
    width: 90%;
    max-width: 600px;
    max-height: 50vh;
    overflow-y: auto;
    margin-top: 1rem;
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.search-result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.search-result-item:hover {
    background-color: var(--bg-secondary);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-image {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.search-result-info {
    flex: 1;
}

.search-result-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.search-result-meta {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    padding-top: var(--header-height);
}


.breadcrumb-section {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 0;
}

.breadcrumb {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    color: var(--text-muted);
}

.breadcrumb-item a {
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary-dark);
}

.breadcrumb-item:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

/* Section Styles */
section {
    padding: 1rem 0;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    section {
        padding: 1.5rem 0;
    }

    .section-title {
        font-size: 2rem;
    }
}


.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-color: var(--tag-color, var(--border-color));
}

.tag:hover {
    background-color: var(--tag-color, var(--primary-color));
    border-color: var(--tag-color, var(--primary-color));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.tag.active {
    background-color: var(--tag-color, var(--primary-color));
    border-color: var(--tag-color, var(--primary-color));
    color: white;
}

.tag-icon {
    font-size: 1rem;
}

.tag-count {
    font-size: 0.75rem;
    padding: 0.125rem 0.375rem;
    background-color: rgba(0,0,0,0.1);
    border-radius: 9999px;
}

.tag:hover .tag-count,
.tag.active .tag-count {
    background-color: rgba(255,255,255,0.2);
}

/* 标签大小等级 - 根据数量显示不同大小 */
.tag-size-1 {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
}

.tag-size-1 .tag-icon {
    font-size: 0.875rem;
}

.tag-size-2 {
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
}

.tag-size-2 .tag-icon {
    font-size: 1rem;
}

.tag-size-3 {
    font-size: 1rem;
    padding: 0.625rem 1.25rem;
}

.tag-size-3 .tag-icon {
    font-size: 1.125rem;
}

.tag-size-4 {
    font-size: 1.125rem;
    padding: 0.75rem 1.5rem;
}

.tag-size-4 .tag-icon {
    font-size: 1.25rem;
}

.tag-size-5 {
    font-size: 1.25rem;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
}

.tag-size-5 .tag-icon {
    font-size: 1.375rem;
}

/* Difficulty Section */
.difficulty-section {
    background-color: var(--bg-secondary);
}

.difficulty-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

@media (min-width: 640px) {
    .difficulty-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .difficulty-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (min-width: 1280px) {
    .difficulty-grid {
        grid-template-columns: repeat(7, 1fr);
    }
}

.difficulty-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.difficulty-card.level-1 { border-color: #22c55e; }
.difficulty-card.level-2 { border-color: #4ade80; }
.difficulty-card.level-3 { border-color: #86efac; }
.difficulty-card.level-4 { border-color: #a7f3d0; }
.difficulty-card.level-5 { border-color: #fcd34d; }
.difficulty-card.level-6 { border-color: #fbbf24; }
.difficulty-card.level-7 { border-color: #f59e0b; }
.difficulty-card.level-8 { border-color: #fb923c; }
.difficulty-card.level-9 { border-color: #f97316; }
.difficulty-card.level-10 { border-color: #ea580c; }
.difficulty-card.level-11 { border-color: #dc2626; }
.difficulty-card.level-12 { border-color: #b91c1c; }
.difficulty-card.level-13 { border-color: #991b1b; }
.difficulty-card.level-14 { border-color: #7f1d1d; }

.difficulty-name {
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
}

.difficulty-range {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.difficulty-count {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Continents Section */
.continents-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

@media (min-width: 640px) {
    .continents-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .continents-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

.continent-card {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.continent-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.continent-card:hover .continent-image {
    transform: scale(1.1);
}

.continent-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1rem;
    color: white;
}

.continent-name {
    font-size: 1.125rem;
    font-weight: 700;
}

.continent-count {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Routes Section */
.routes-section {
    background-color: var(--bg-secondary);
}

.routes-filter {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Waterfall Layout */
.routes-waterfall {
    column-count: 1;
    column-gap: 1rem;
}

@media (min-width: 640px) {
    .routes-waterfall {
        column-count: 2;
    }
}

@media (min-width: 1024px) {
    .routes-waterfall {
        column-count: 3;
    }
}

@media (min-width: 1280px) {
    .routes-waterfall {
        column-count: 4;
    }
}

.route-card {
    break-inside: avoid;
    margin-bottom: 1rem;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.route-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.route-image-wrapper {
    position: relative;
    overflow: hidden;
}

.route-image {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.route-card:hover .route-image {
    transform: scale(1.05);
}

.route-difficulty-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.25rem 0.75rem;
    background-color: rgba(0,0,0,0.7);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
}

.route-content {
    padding: 1rem;
}

.route-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.route-location {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.route-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.route-stat {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.route-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.route-tag {
    padding: 0.25rem 0.5rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Loading Indicator */
.loading-indicator {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    color: var(--text-secondary);
}

.loading-indicator.active {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Route Detail */
.route-detail-section {
    background-color: var(--bg-secondary);
    min-height: calc(100vh - var(--header-height));
}

.route-detail {
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.route-detail-header {
    position: relative;
}

.route-detail-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

@media (min-width: 768px) {
    .route-detail-image {
        height: 400px;
    }
}

.route-detail-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
}

.route-detail-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.route-detail-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    opacity: 0.9;
}

.route-detail-content {
    padding: 2rem;
}

.route-detail-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .route-detail-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

.detail-stat {
    text-align: center;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.detail-stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.detail-stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.route-detail-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.route-detail-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.route-detail-features {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.feature-icon {
    font-size: 1.5rem;
}

.feature-content h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.feature-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.route-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.route-detail-tag {
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border-radius: 9999px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    margin-bottom: 1.5rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--text-primary);
    transition: background-color var(--transition-fast);
}

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

/* Footer */
.site-footer {
    background-color: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: 1rem 0;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Footer Stats */
.footer-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.footer-stat-item {
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
}

.footer-stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.footer-stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Footer Copyright */
.footer-copyright {
    display: flex;
    justify-content: center;
}

.footer-copyright p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

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

/* Image Lazy Loading */
.lazy-image {
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.lazy-image.loaded {
    opacity: 1;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn var(--transition-normal) ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}