/* ============================================
   CSS Variables & Design Tokens - Modern Flat UI
   ============================================ */
:root {
    /* Primary Colors - Solid flat colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-primary-subtle: rgba(99, 102, 241, 0.08);

    /* Secondary & Accent */
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;
    --color-pink: #ec4899;

    /* Background Colors */
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-secondary: #f1f5f9;
    --color-surface-hover: #e2e8f0;

    /* Text Colors */
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-text-inverse: #ffffff;

    /* Border Colors */
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;
    --color-border-focus: #6366f1;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-success-bg: #d1fae5;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-error-bg: #fee2e2;

    /* Shadows - Modern soft shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.12);
    --shadow-2xl: 0 24px 48px rgba(0, 0, 0, 0.16);
    --shadow-primary: 0 4px 14px rgba(99, 102, 241, 0.25);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06), 0 0 1px rgba(0, 0, 0, 0.1);
    --shadow-card-hover: 0 12px 24px rgba(0, 0, 0, 0.1), 0 0 1px rgba(0, 0, 0, 0.1);

    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-3xl: 24px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 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;

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;

    /* Z-index */
    --z-dropdown: 50;
    --z-sticky: 100;
    --z-modal: 1000;
    --z-toast: 1100;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    min-height: 100vh;
}

::selection {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

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

::-webkit-scrollbar-track {
    background: transparent;
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-hover);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--space-6);
    transition: box-shadow var(--duration-normal) var(--ease-out);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    flex-shrink: 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    padding: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    color: var(--color-text-inverse);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-extrabold);
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

/* Search */
.search-container {
    flex: 1;
    max-width: 480px;
    position: relative;
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    height: 44px;
    padding: 0 var(--space-4) 0 var(--space-12);
    background: var(--color-surface-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-xl);
    font-size: var(--font-size-sm);
    font-family: inherit;
    color: var(--color-text-primary);
    transition: all var(--duration-normal) var(--ease-out);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-input:hover {
    background: var(--color-surface);
    border-color: var(--color-border);
}

.search-input:focus {
    outline: none;
    background: var(--color-surface);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

.clear-search {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-hover);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-fast);
}

.clear-search svg {
    width: 14px;
    height: 14px;
    color: var(--color-text-secondary);
}

.clear-search:hover {
    background: var(--color-error);
}

.clear-search:hover svg {
    color: var(--color-text-inverse);
}

.clear-search.visible {
    opacity: 1;
    visibility: visible;
}

/* Header Stats */
.header-stats {
    display: flex;
    gap: var(--space-6);
    flex-shrink: 0;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    background: var(--color-surface-secondary);
    border-radius: var(--radius-lg);
    min-width: 80px;
}

.stat-value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-bold);
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Main Content
   ============================================ */
.main-content {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-6);
}

/* ============================================
   Categories Section
   ============================================ */
.categories-section {
    margin-bottom: var(--space-8);
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    padding: var(--space-5);
    border: 1px solid var(--color-border);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-md);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}

.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

.toggle-categories {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast);
}

.toggle-categories svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-secondary);
    transition: transform var(--duration-normal) var(--ease-out);
}

.toggle-categories:hover {
    background: var(--color-surface-hover);
}

.toggle-categories.collapsed svg {
    transform: rotate(-90deg);
}

.categories-wrapper {
    overflow: hidden;
    transition: all var(--duration-slow) var(--ease-out);
}

.categories-wrapper.collapsed {
    max-height: 0 !important;
    opacity: 0;
}

.categories-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.category-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    height: 36px;
    padding: 0 var(--space-4);
    background: var(--color-surface-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast);
    text-transform: capitalize;
}

.category-chip:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.category-chip.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-primary);
}

.category-chip .count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 20px;
    padding: 0 var(--space-2);
    background: rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-semibold);
}

.category-chip.active .count {
    background: rgba(255, 255, 255, 0.2);
}

/* ============================================
   Gallery Section
   ============================================ */
.gallery-section {
    min-height: 50vh;
}

.gallery-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.gallery-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.gallery-count {
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-muted);
    padding: var(--space-2) var(--space-4);
    background: var(--color-surface-secondary);
    border-radius: var(--radius-full);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-5);
}

/* Image Card */
.image-card {
    position: relative;
    aspect-ratio: 1;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-card);
}

.image-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-primary);
}

.image-card-inner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: var(--color-surface-secondary);
}

.image-card img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform var(--duration-normal) var(--ease-out);
}

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

.image-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.2) 50%, transparent 100%);
    opacity: 0;
    transition: opacity var(--duration-normal);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-4);
}

.image-card:hover .image-card-overlay {
    opacity: 1;
}

.image-card-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-inverse);
    margin-bottom: var(--space-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.image-card-category {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.8);
    text-transform: capitalize;
}

.image-card-actions {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: flex;
    gap: var(--space-2);
    opacity: 0;
    transform: translateY(-8px);
    transition: all var(--duration-normal) var(--ease-out);
}

.image-card:hover .image-card-actions {
    opacity: 1;
    transform: translateY(0);
}

.card-action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast);
    box-shadow: var(--shadow-md);
}

.card-action-btn svg {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
}

.card-action-btn:hover {
    background: var(--color-primary);
}

.card-action-btn:hover svg {
    color: var(--color-text-inverse);
}

/* ============================================
   Empty & Loading States
   ============================================ */
.empty-state,
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-16);
    text-align: center;
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    border: 2px dashed var(--color-border);
}

.empty-icon {
    width: 80px;
    height: 80px;
    color: var(--color-border-hover);
    margin-bottom: var(--space-6);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--space-6);
}

.empty-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.empty-text,
.loading-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

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

/* ============================================
   Lightbox Modal
   ============================================ */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
}

.lightbox-container {
    position: relative;
    width: 92%;
    max-width: 1100px;
    max-height: 90vh;
    display: flex;
    align-items: center;
    gap: var(--space-4);
    z-index: 1;
    transform: scale(0.96);
    transition: transform var(--duration-normal) var(--ease-out);
}

.lightbox.active .lightbox-container {
    transform: scale(1);
}

/* Close Button */
.lightbox-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-fast);
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.lightbox-close svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-primary);
}

.lightbox-close:hover {
    background: var(--color-error);
    border-color: var(--color-error);
}

.lightbox-close:hover svg {
    color: var(--color-text-inverse);
}

/* Navigation */
.lightbox-nav {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-fast);
    box-shadow: var(--shadow-lg);
}

.lightbox-nav svg {
    width: 22px;
    height: 22px;
    color: var(--color-text-primary);
}

.lightbox-nav:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-primary);
}

.lightbox-nav:hover svg {
    color: var(--color-text-inverse);
}

/* Content */
.lightbox-content {
    flex: 1;
    position: relative;
    display: flex;
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    max-height: 85vh;
}

.lightbox-image-container {
    flex: 1.4;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-10);
    background: var(--color-surface-secondary);
    min-height: 380px;
}

.lightbox-image {
    max-width: 100%;
    max-height: 65vh;
    object-fit: contain;
    filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.1));
    transition: opacity var(--duration-normal);
}

.lightbox-info {
    flex: 0.6;
    padding: var(--space-8);
    padding-top: var(--space-16);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    border-left: 1px solid var(--color-border);
    overflow-y: auto;
}

.lightbox-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    line-height: 1.3;
    word-break: break-word;
}

.lightbox-category {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    width: fit-content;
    padding: var(--space-2) var(--space-3);
    background: var(--color-primary-light);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-primary);
    text-transform: capitalize;
}

.lightbox-category::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
}

.lightbox-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-2);
}

.keyword-tag {
    padding: var(--space-1) var(--space-3);
    background: var(--color-surface-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    transition: all var(--duration-fast);
}

.keyword-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.lightbox-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    height: 48px;
    padding: 0 var(--space-6);
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-inverse);
    cursor: pointer;
    transition: all var(--duration-fast);
    margin-top: auto;
    box-shadow: var(--shadow-primary);
}

.lightbox-download svg {
    width: 18px;
    height: 18px;
}

.lightbox-download:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-primary);
    z-index: var(--z-sticky);
}

.back-to-top svg {
    width: 22px;
    height: 22px;
    color: var(--color-text-inverse);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-hover);
    transform: translateY(-3px);
}

/* ============================================
   Toast
   ============================================ */
.toast {
    position: fixed;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background: var(--color-surface);
    border: 1px solid var(--color-success);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    transition: all var(--duration-normal) var(--ease-out);
    z-index: var(--z-toast);
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    width: 24px;
    height: 24px;
    padding: 4px;
    background: var(--color-success-bg);
    border-radius: var(--radius-full);
    color: var(--color-success);
}

.toast-message {
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1200px) {
    .lightbox-content {
        flex-direction: column;
    }

    .lightbox-info {
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-top: var(--space-6);
    }

    .lightbox-image-container {
        min-height: 280px;
    }
}

@media (max-width: 992px) {
    .header-container {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .search-container {
        order: 10;
        max-width: 100%;
        flex-basis: 100%;
    }

    .header-stats {
        margin-left: auto;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: var(--space-4);
    }

    .header {
        padding: var(--space-3) var(--space-4);
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }

    .logo-text {
        font-size: var(--font-size-lg);
    }

    .stat-item {
        min-width: 64px;
        padding: var(--space-2) var(--space-3);
    }

    .stat-value {
        font-size: var(--font-size-md);
    }

    .categories-section {
        padding: var(--space-4);
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--space-3);
    }

    .gallery-title {
        font-size: var(--font-size-xl);
    }

    .gallery-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .lightbox-container {
        width: 96%;
        gap: var(--space-2);
    }

    .lightbox-nav {
        width: 40px;
        height: 40px;
    }

    .lightbox-info {
        padding: var(--space-5);
    }

    .lightbox-title {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .header-stats {
        display: none;
    }

    .category-chip {
        height: 32px;
        font-size: var(--font-size-xs);
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }

    .image-card {
        border-radius: var(--radius-lg);
    }

    .image-card-actions {
        opacity: 1;
        transform: translateY(0);
    }

    .image-card-overlay {
        opacity: 1;
    }

    .lightbox-nav {
        width: 36px;
        height: 36px;
    }

    .lightbox-nav svg {
        width: 18px;
        height: 18px;
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: var(--space-4);
        right: var(--space-4);
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.image-card {
    animation: fadeUp 0.4s var(--ease-out) backwards;
}

.image-card:nth-child(1) {
    animation-delay: 0.02s;
}

.image-card:nth-child(2) {
    animation-delay: 0.04s;
}

.image-card:nth-child(3) {
    animation-delay: 0.06s;
}

.image-card:nth-child(4) {
    animation-delay: 0.08s;
}

.image-card:nth-child(5) {
    animation-delay: 0.1s;
}

.image-card:nth-child(6) {
    animation-delay: 0.12s;
}

.image-card:nth-child(7) {
    animation-delay: 0.14s;
}

.image-card:nth-child(8) {
    animation-delay: 0.16s;
}

/* Focus States */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print */
@media print {

    .header,
    .categories-section,
    .lightbox,
    .back-to-top,
    .toast,
    .image-card-actions {
        display: none !important;
    }
}