* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --danger-color: #ea4335;
    --warning-color: #fbbc04;
    --dark: #202124;
    --light: #ffffff;
    --gray: #5f6368;
    --light-gray: #f1f3f4;
    --border: #dadce0;
    --shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --background: #ffffff;
    --surface: #ffffff;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --sidebar-width: 240px;
}

[data-theme="dark"] {
    --primary-color: #8ab4f8;
    --secondary-color: #81c995;
    --danger-color: #f28b82;
    --warning-color: #fdd663;
    --dark: #e8eaed;
    --light: #1f1f23;
    --gray: #9aa0a6;
    --light-gray: #2a2a2e;
    --border: #3c3c40;
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.4);
    --background: #1a1a1d;
    --surface: #25252a;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background);
    min-height: 100vh;
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Login Screen */
.login-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

[data-theme="dark"] .login-screen {
    background: var(--background);
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-card {
    background: var(--surface);
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

.login-icon {
    font-size: 64px;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.login-card h1 {
    font-size: 36px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: -0.5px;
}

[data-theme="dark"] .login-card h1 {
    background: linear-gradient(135deg, var(--primary-color) 0%, #a8c7fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 35px;
    font-size: 15px;
    font-weight: 400;
}

.error-message {
    color: var(--danger-color);
    margin-top: 15px;
    font-size: 14px;
}

/* Main App Layout */
.main-app {
    display: flex;
    min-height: 100vh;
    background: var(--background);
}

/* Left Sidebar */
.left-sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 32px;
    line-height: 1;
}

.logo-text {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-section {
    margin-bottom: 32px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--gray);
    padding: 0 20px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border-left: 3px solid transparent;
    font-size: 14px;
    font-weight: 500;
}

.nav-item:hover {
    background: var(--light-gray);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--light-gray);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.nav-icon {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-label {
    flex: 1;
}

/* Categories in Sidebar */
.categories-nav {
    display: flex;
    flex-direction: column;
}

.category-nav-item {
    margin-bottom: 4px;
}

.category-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
}

.category-nav-header:hover {
    background: var(--light-gray);
    color: var(--text-primary);
}

.category-nav-header.active {
    background: var(--light-gray);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.category-nav-name {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.category-toggle {
    font-size: 10px;
    transition: transform 0.3s ease;
    color: var(--gray);
}

.category-toggle.expanded {
    transform: rotate(90deg);
}

.subcategories-nav {
    display: none;
    flex-direction: column;
    background: var(--light-gray);
}

.subcategories-nav.expanded {
    display: flex;
}

.subcategory-nav-item {
    padding: 10px 20px 10px 48px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.subcategory-nav-item:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.05);
}

.subcategory-nav-item.active {
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    background: rgba(66, 133, 244, 0.1);
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--background);
}

/* Top Header */
.top-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 90;
    backdrop-filter: blur(10px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.search-box {
    position: relative;
    width: 300px;
}

.search-box input {
    width: 100%;
    padding: 10px 40px 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: var(--background);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1);
}

.search-icon {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    color: var(--gray);
    pointer-events: none;
}

.theme-toggle {
    background: var(--light-gray);
    border: 1px solid var(--border);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background: var(--border);
    transform: rotate(20deg) scale(1.1);
}

.user-profile {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
}

/* Filter Section */
.filter-section {
    padding: 30px 40px 20px;
}

.filter-tags {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tags-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-filter-item {
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
}

.tag-filter-item:hover {
    background: var(--light-gray);
    color: var(--text-primary);
    transform: translateY(-2px);
}

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

/* Content Sections */
.content-sections {
    padding: 0 40px 40px;
}

.section-container {
    margin-bottom: 48px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.section-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.results-count {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 6px 14px;
    background: var(--light-gray);
    border-radius: 20px;
    font-weight: 500;
}

.sort-select {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.see-more {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.see-more:hover {
    opacity: 0.7;
}

/* Video Row (Horizontal Scroll) */
.video-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* Video Card */
.video-card {
    background: var(--surface);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-thumbnail::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-card:hover .video-thumbnail::after {
    opacity: 1;
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 48px;
    opacity: 0.8;
    pointer-events: none;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    transition: all 0.3s ease;
    z-index: 2;
}

.video-card:hover .play-icon {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 1;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

.video-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.video-category {
    display: inline-block;
    padding: 4px 10px;
    background: var(--primary-color);
    color: white;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.video-date {
    font-size: 11px;
    color: var(--gray);
}

/* Filter Badges */
.filter-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.active-filter-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--light-gray);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-primary);
}

.active-filter-badge button {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 16px;
    padding: 0;
    transition: opacity 0.2s ease;
}

.active-filter-badge button:hover {
    opacity: 0.7;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    background: var(--surface);
    border-radius: 16px;
    border: 1px solid var(--border);
}

.empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--surface);
    border-radius: 20px;
    max-width: 1000px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease;
    border: 1px solid var(--border);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
    background: var(--light-gray);
}

.modal-header h2 {
    font-size: 24px;
    color: var(--text-primary);
    font-weight: 700;
}

.close-btn {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--gray);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--danger-color);
}

/* Video Modal */
.video-modal {
    max-width: 1200px;
}

.video-player-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    background: #000;
}

.video-player-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-player-container iframe,
.video-player-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    background: #000;
    object-fit: contain;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    pointer-events: auto;
}

/* Prevent right-click context menu on video container */
.video-player-container {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.video-player-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* Hide download button in video controls (if browser supports it) */
.video-player-container video::-webkit-media-controls {
    display: flex !important;
}

.video-player-container video::-webkit-media-controls-enclosure {
    display: flex !important;
}

.video-player-container video::-webkit-media-controls-panel {
    display: flex !important;
}

.video-details {
    padding: 30px;
}

.video-details p {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 15px;
}

/* Admin Panel */
.admin-panel {
    max-width: 900px;
}

.admin-tabs {
    display: flex;
    gap: 10px;
    padding: 20px 30px 0;
    border-bottom: 2px solid var(--light-gray);
}

.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: var(--gray);
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    padding: 30px;
}

.add-video-form {
    background: var(--light-gray);
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.add-video-form h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.add-video-form form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.add-video-form input,
.add-video-form textarea,
.add-video-form select {
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    background: var(--surface);
    color: var(--text-primary);
}

.add-video-form input:focus,
.add-video-form textarea:focus,
.add-video-form select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-primary {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 133, 244, 0.4);
}

.video-list h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.admin-video-item {
    background: var(--light-gray);
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-video-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.admin-video-info p {
    font-size: 12px;
    color: var(--gray);
}

.admin-video-actions {
    display: flex;
    gap: 8px;
}

.btn-edit {
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-edit:hover {
    background: #3367d6;
}

.btn-delete {
    padding: 8px 16px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-delete:hover {
    background: #d33b2e;
}

/* Email Management */
.email-management h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.add-email-form {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.add-email-form input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: var(--surface);
    color: var(--text-primary);
}

.add-email-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.email-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.email-item {
    background: var(--light-gray);
    padding: 15px;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.email-item span {
    font-size: 14px;
    color: var(--text-primary);
}

/* Category Management */
.category-management h3,
.tag-management h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.add-category-form,
.add-tag-form {
    background: var(--light-gray);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 25px;
}

.add-category-form h4 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 16px;
}

.add-category-form input,
.add-tag-form input[type="text"] {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: var(--surface);
    color: var(--text-primary);
}

.add-tag-form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.add-tag-form input[type="color"] {
    width: 60px;
    height: 45px;
    border: 2px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
}

.category-tree {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.category-item {
    background: var(--light-gray);
    border-radius: 8px;
    overflow: hidden;
    cursor: move;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

.category-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.category-item[draggable="true"] {
    cursor: grab;
}

.category-item[draggable="true"]:active {
    cursor: grabbing;
}

.drag-handle {
    cursor: grab;
    font-size: 18px;
    margin-right: 10px;
    opacity: 0.6;
    user-select: none;
}

.drag-handle:active {
    cursor: grabbing;
}

.category-name {
    flex: 1;
    font-weight: 500;
}

.category-edit-input {
    flex: 1;
    padding: 5px 10px;
    border: 2px solid var(--primary-color);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.category-header {
    background: var(--primary-color);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.category-actions {
    display: flex;
    gap: 10px;
}

.btn-small {
    padding: 6px 12px;
    background: white;
    color: var(--primary-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-small:hover {
    background: var(--light-gray);
}

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

.btn-small.danger:hover {
    background: #d33b2e;
}

.subcategories {
    padding: 15px 20px;
}

.subcategory-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
}

.subcategory-item {
    background: var(--surface);
    padding: 12px 15px;
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    transition: background 0.2s ease;
}

.subcategory-item:hover {
    background: var(--hover-bg);
}

.subcategory-item .category-name {
    font-size: 14px;
    color: var(--text-primary);
    flex: 1;
}

.subcategory-item .category-edit-input {
    flex: 1;
    padding: 5px 10px;
    border: 2px solid var(--primary-color);
    border-radius: 4px;
    font-size: 13px;
}

.subcategory-item .category-actions {
    display: flex;
    gap: 5px;
}

.add-subcategory {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.add-subcategory input {
    flex: 1;
    padding: 10px 12px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
}

/* Tag Management */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tag-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    background: var(--light-gray);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.tag-item button {
    background: rgba(0, 0, 0, 0.1);
    border: none;
    color: var(--text-secondary);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.tag-item button:hover {
    background: rgba(0, 0, 0, 0.2);
    color: var(--danger-color);
}

/* Tags Container for Video Form */
.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding: 15px;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: 6px;
    min-height: 60px;
    position: relative;
}

.tags-container::after {
    content: 'Select at least one tag';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--gray);
    font-size: 13px;
    pointer-events: none;
    opacity: 0.5;
}

.tags-container:has(.tag-checkbox:checked)::after {
    display: none;
}

.tag-checkbox {
    display: none;
}

.tag-label {
    display: inline-flex;
    align-items: center;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0.5;
    border: 2px solid var(--border);
    background: var(--light-gray);
    color: var(--gray);
}

.tag-checkbox:checked + .tag-label {
    opacity: 1;
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Edit Video Modal */
.edit-video-modal {
    max-width: 700px;
}

.edit-video-form {
    padding: 30px;
}

.edit-video-form label {
    display: block;
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 8px;
    margin-top: 15px;
    font-weight: 500;
}

.edit-video-form input,
.edit-video-form select,
.edit-video-form textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    background: var(--surface);
    color: var(--text-primary);
}

.edit-video-form input:focus,
.edit-video-form select:focus,
.edit-video-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.edit-video-actions {
    display: flex;
    gap: 10px;
    margin-top: 25px;
}

.edit-video-actions button {
    flex: 1;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .left-sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
    }

    .content-sections {
        padding: 0 20px 40px;
    }

    .top-header {
        padding: 16px 20px;
    }

    .search-box {
        width: 200px;
    }
}

@media (max-width: 768px) {
    .video-row {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 16px;
    }

    .top-header {
        flex-wrap: wrap;
        gap: 12px;
    }

    .search-box {
        order: 3;
        width: 100%;
    }

    .modal-content {
        margin: 10px;
    }

    .admin-tabs {
        flex-wrap: wrap;
    }

    .tab-btn {
        font-size: 14px;
        padding: 10px 16px;
    }
}