/* ============================================
   CSS Variables / Design Tokens
   ============================================ */
:root {
    /* Colors - Electric Tech Theme */
    --color-bg: #08090d;
    --color-surface: #0f1117;
    --color-surface-2: #161822;
    --color-surface-3: #1e2130;
    --color-text: #e8eaed;
    --color-text-secondary: #8b919e;
    --color-text-muted: #5c6270;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);
    --color-accent: #00d4aa;
    --color-accent-dim: rgba(0, 212, 170, 0.15);
    --color-accent-hover: #00f0c0;
    --color-accent-glow: rgba(0, 212, 170, 0.4);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--color-accent-glow);

    /* Typography */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Layout */
    --header-height: 72px;
    --max-width: 1200px;
}

/* Light Theme */
.light {
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-surface-2: #f1f3f5;
    --color-surface-3: #e9ecef;
    --color-text: #111111;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;
}

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

html {
    scroll-behavior: smooth;
    /* 滚动条容器是 viewport(html)，gutter 设在这里才能真正预留滚动条空间 */
    scrollbar-gutter: stable;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Lock body scroll when modal is open - html gutter 仍保留滚动条空间，页面不晃 */
body.modal-open {
    overflow: hidden;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

/* 自定义滚动条（页面级） */
html::-webkit-scrollbar,
body::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

html::-webkit-scrollbar-track,
body::-webkit-scrollbar-track {
    background: transparent;
}

html::-webkit-scrollbar-thumb,
body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.22);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

html::-webkit-scrollbar-thumb:hover,
body::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

html, body {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.22) transparent;
}

.light html::-webkit-scrollbar-thumb,
.light body::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.28);
}

.light html, .light body {
    scrollbar-color: rgba(0, 0, 0, 0.28) transparent;
}

.light .logo-title {
    color: #fff;
}

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

/* ============================================
   Background Effects
   ============================================ */
.bg-pattern {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(0, 212, 170, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(99, 102, 241, 0.03) 0%, transparent 50%);
}

.bg-pattern::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0v10M30 50v10M0 30h10M50 30h10' stroke='%23ffffff' stroke-opacity='0.03' stroke-width='1' fill='none'/%3E%3Ccircle cx='30' cy='30' r='2' fill='%23ffffff' fill-opacity='0.02'/%3E%3C/svg%3E");
    background-size: 60px 60px;
}

.bg-glow {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    height: 400px;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(ellipse at center top, var(--color-accent-dim) 0%, transparent 70%);
    filter: blur(80px);
}

/* ============================================
   App Container
   ============================================ */
.app {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(8, 9, 13, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--color-text);
}

.logo:hover {
    color: var(--color-text);
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-title {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-surface-3);
    border-color: var(--color-border-hover);
}

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

/* Language Switch */
.lang-switch {
    display: flex;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
}

.lang-btn {
    padding: 6px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    color: var(--color-text);
}

.lang-btn.active {
    background: var(--color-accent);
    color: #000;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: var(--space-3xl) var(--space-lg);
    text-align: center;
}

.hero-inner {
    max-width: 640px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 6px 14px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease-out;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Controls Section
   ============================================ */
.controls {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-xl);
}

.search-wrapper {
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.search-box {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    transition: all var(--transition-normal);
}

.search-box:focus-within {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.search-icon {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    font-size: 0.9375rem;
    color: var(--color-text);
    padding: var(--space-sm) 0;
}

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

.search-clear {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.search-clear:hover {
    background: var(--color-surface-2);
    color: var(--color-text);
}

/* ============================================
   Main Content
   ============================================ */
.main {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--space-lg) var(--space-3xl);
}

/* ============================================
   Product Grid
   ============================================ */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

/* Product Card */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
    animation: cardFadeIn 0.5s ease-out both;
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--color-accent-dim);
    transform: translateY(-4px);
}

.card-image-wrapper {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-surface-2);
}

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

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

.card-content {
    padding: var(--space-lg);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.card-stats {
    display: flex;
    gap: var(--space-lg);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.card-stat {
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-stat svg {
    width: 16px;
    height: 16px;
}

.card-btn {
    width: 100%;
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.card-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #000;
}

/* ============================================
   No Results
   ============================================ */
.no-results {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-text-secondary);
}

.no-results-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    color: var(--color-text-muted);
}

.no-results-icon svg {
    width: 100%;
    height: 100%;
}

.no-results h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    margin-top: auto;
    padding: var(--space-xl) var(--space-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer p {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0, 0, 0, 0.75);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.modal {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 201;
    width: 90%;
    max-width: 1100px;
    height: 600px;
    margin: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.modal-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.modal-header-image {
    flex-shrink: 0;
    width: 120px;
    height: 75px;
    overflow: hidden;
    background: var(--color-surface-2);
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast);
    cursor: pointer;
}

.modal-header-image:hover {
    transform: scale(1.03);
}

.modal-header-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.modal-header-left {
    flex: 1;
    min-width: 0;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
}

.modal-close {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.modal-close:hover {
    background: var(--color-surface-3);
    color: var(--color-text);
    border-color: var(--color-border-hover);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.modal-description {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Modal Tabs */
.modal-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-sm) var(--space-md);
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.tab-btn svg {
    width: 18px;
    height: 18px;
}

.tab-btn:hover {
    background: var(--color-surface-2);
    color: var(--color-text);
}

.tab-btn.active {
    background: var(--color-accent);
    color: #000;
}

.tab-count {
    padding: 2px 6px;
    background: var(--color-surface-3);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.tab-btn.active .tab-count {
    background: rgba(0, 0, 0, 0.2);
    color: inherit;
}

/* Modal Content */
.modal-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-height: 320px;
    overflow-y: auto;
}

/* Resource Item */
.resource-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.resource-item:hover {
    border-color: var(--color-border-hover);
}

.resource-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.resource-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.resource-title {
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resource-type {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.resource-actions {
    display: flex;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.btn-preview {
    padding: var(--space-xs) var(--space-md);
    background: var(--color-surface);
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-preview:hover {
    background: var(--color-accent);
    color: #000;
}

.btn-preview[disabled] {
    cursor: not-allowed;
    opacity: 0.5;
}

.btn-download {
    padding: var(--space-xs) var(--space-md);
    background: var(--color-accent);
    color: #000;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-download:hover {
    background: var(--color-accent-hover);
    color: #000;
}

.btn-download svg {
    width: 14px;
    height: 14px;
}

/* Video Preview */
.video-preview {
    width: 100%;
    height: 400px;
    margin-top: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
}

.video-preview iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* PDF Preview */
.pdf-preview {
    width: 100%;
    height: 500px;
    margin-top: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
}

.pdf-preview iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.empty-tab {
    text-align: center;
    padding: var(--space-xl);
    color: var(--color-text-secondary);
}

/* 历史版本区（在每个 tab 底部，跟当前内容用一条横线分隔） */
.history-section {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.history-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-md);
}

.history-section-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.history-section-list .resource-item {
    opacity: 0.7;
}

.history-section-list .resource-item:hover {
    opacity: 1;
}

/* 资源操作按钮：预览 + 下载 */
.resource-actions {
    display: flex;
    gap: var(--space-sm);
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-2);
    color: var(--color-text);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-action:hover {
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

.btn-action.btn-download {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #000;
}

.btn-action.btn-download:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #000;
}

.btn-action svg {
    flex-shrink: 0;
}

/* 预览弹窗：全屏显示 iframe / 文本 */
.preview-modal {
    width: 90vw;
    max-width: 1100px;
    height: 85vh;
    max-height: 900px;
}

.preview-modal-body {
    padding: 0;
    background: var(--color-surface);
    display: flex;
    flex-direction: column;
}

.preview-frame {
    flex: 1;
    width: 100%;
    height: 100%;
    border: none;
    background: #fff;
}

.preview-text {
    flex: 1;
    width: 100%;
    margin: 0;
    padding: var(--space-lg);
    overflow: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-surface);
    white-space: pre-wrap;
    word-break: break-word;
}

/* 图片预览：居中、自适应最大尺寸 */
.preview-image {
    flex: 1;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
    display: block;
}

/* 视频预览：填满容器，原生控制条 */
.preview-video {
    flex: 1;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
    display: block;
    outline: none;
}

/* ============================================
   Toast Notification
   ============================================ */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 12px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    opacity: 0;
    transition: all 0.3s ease;
}

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

.toast::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-accent);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }

    .header-content {
        padding: 0 var(--space-sm);
        gap: var(--space-sm);
    }

    .logo {
        gap: var(--space-sm);
    }

    .logo-icon img {
        width: 32px;
        height: 32px;
    }

    .logo-title {
        font-size: 1rem;
    }

    .header-actions {
        gap: var(--space-sm);
    }

    .theme-toggle,
    .lang-switch {
        padding: 4px 8px;
    }

    .hero {
        padding: calc(var(--space-2xl) + var(--header-height)) var(--space-sm) var(--space-lg);
    }

    .logo-subtitle {
        display: none;
    }

    .hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .controls {
        padding: 0 var(--space-md) var(--space-lg);
    }

    .main {
        padding: 0 var(--space-md) var(--space-2xl);
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .modal {
        width: 95%;
        max-height: 85vh;
    }

    .modal-tabs {
        gap: 4px;
    }

    .tab-btn {
        padding: var(--space-sm);
    }

    .tab-btn span:not(.tab-count) {
        display: none;
    }

    .tab-btn svg {
        width: 20px;
        height: 20px;
    }

    .modal-header-image {
        display: none;
    }

    .modal-header {
        flex-wrap: wrap;
    }

    .modal-content {
        padding-right: 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 0.875rem;
    }

    .video-preview,
    .pdf-preview {
        height: 300px;
    }
}