/* ═══════════════════════════════════════════════════════════
   YouTube Comment Manager — Premium Dark Theme
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ──────────────────────────────────────── */
:root {
    --bg-primary:    #0f0f14;
    --bg-secondary:  #1a1a24;
    --bg-card:       #1e1e2e;
    --bg-card-hover: #252538;
    --bg-input:      #16161f;
    --bg-sidebar:    #12121a;

    --text-primary:   #f0f0f5;
    --text-secondary: #9898b0;
    --text-muted:     #6b6b82;

    --accent:         #ff0033;
    --accent-hover:   #e6002e;
    --accent-soft:    rgba(255, 0, 51, 0.15);
    --accent-glow:    rgba(255, 0, 51, 0.4);

    --success:  #00c853;
    --warning:  #ffab00;
    --error:    #ff1744;
    --info:     #2979ff;

    --border:       #2a2a3d;
    --border-light: #353550;

    --glass-bg:     rgba(30, 30, 46, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);

    --radius-sm:  6px;
    --radius-md:  10px;
    --radius-lg:  16px;
    --radius-xl:  20px;

    --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);

    --sidebar-width: 260px;
    --header-height: 64px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

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

/* ── Layout ─────────────────────────────────────────────── */
.layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px 32px;
    min-height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand .brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), #ff4466);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.sidebar-brand h1 {
    font-size: 16px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, #ccc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.3px;
}

.sidebar-brand .brand-tag {
    font-size: 10px;
    background: var(--accent-soft);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    margin-bottom: 2px;
}

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

.nav-item.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--accent);
    border-radius: 0 3px 3px 0;
}

.nav-item .nav-icon {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.nav-item .nav-badge {
    margin-left: auto;
    background: var(--accent);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* Sidebar User Profile */
.sidebar-user {
    padding: 16px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-user .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #ff6688);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    color: white;
}

.sidebar-user .user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user .user-name {
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user .user-role {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: capitalize;
}

/* ── Page Header ────────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-header h2 {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.page-header .subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 2px;
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

.card-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
}

/* Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-light);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    border-radius: 0 0 0 80px;
    opacity: 0.08;
}

.stat-card.red::after    { background: var(--accent); }
.stat-card.green::after  { background: var(--success); }
.stat-card.blue::after   { background: var(--info); }
.stat-card.yellow::after { background: var(--warning); }

.stat-card .stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}

.stat-card.red .stat-icon    { background: var(--accent-soft); color: var(--accent); }
.stat-card.green .stat-icon  { background: rgba(0,200,83,0.15); color: var(--success); }
.stat-card.blue .stat-icon   { background: rgba(41,121,255,0.15); color: var(--info); }
.stat-card.yellow .stat-icon { background: rgba(255,171,0,0.15); color: var(--warning); }

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
    color: white;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    color: var(--text-primary);
}

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #00b548; transform: translateY(-1px); color: white; }

.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { background: #e6143d; transform: translateY(-1px); color: white; }

.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.btn-google {
    background: white;
    color: #333;
    border: 1px solid #ddd;
    font-weight: 600;
}
.btn-google:hover {
    background: #f8f8f8;
    color: #333;
}

/* ── Forms ──────────────────────────────────────────────── */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239898b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ── Tables ─────────────────────────────────────────────── */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

table thead {
    background: var(--bg-secondary);
}

table th {
    padding: 14px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

table td {
    padding: 14px 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

table tbody tr {
    transition: var(--transition);
}

table tbody tr:hover {
    background: var(--bg-card-hover);
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* ── Badges ─────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-superadmin { background: rgba(255,0,51,0.15); color: var(--accent); }
.badge-admin      { background: rgba(41,121,255,0.15); color: var(--info); }
.badge-creator    { background: rgba(0,200,83,0.15); color: var(--success); }
.badge-active     { background: rgba(0,200,83,0.15); color: var(--success); }
.badge-inactive   { background: rgba(255,171,0,0.15); color: var(--warning); }
.badge-suspended  { background: rgba(255,23,68,0.15); color: var(--error); }
.badge-sent       { background: rgba(0,200,83,0.15); color: var(--success); }
.badge-failed     { background: rgba(255,23,68,0.15); color: var(--error); }
.badge-pending    { background: rgba(255,171,0,0.15); color: var(--warning); }

/* ── Auth Pages ─────────────────────────────────────────── */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.auth-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, var(--accent-soft) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(41,121,255,0.08) 0%, transparent 50%);
    animation: authBg 20s ease infinite alternate;
}

@keyframes authBg {
    0%   { transform: translate(0, 0); }
    100% { transform: translate(-5%, -5%); }
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.auth-card .auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-card .auth-logo {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), #ff4466);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 16px;
    box-shadow: 0 8px 25px var(--accent-glow);
}

.auth-card h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.auth-card .auth-subtitle {
    color: var(--text-muted);
    font-size: 14px;
}

/* ── Alert Messages ─────────────────────────────────────── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

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

.alert-success { background: rgba(0,200,83,0.12); color: var(--success); border: 1px solid rgba(0,200,83,0.25); }
.alert-error   { background: rgba(255,23,68,0.12); color: var(--error); border: 1px solid rgba(255,23,68,0.25); }
.alert-warning { background: rgba(255,171,0,0.12); color: var(--warning); border: 1px solid rgba(255,171,0,0.25); }
.alert-info    { background: rgba(41,121,255,0.12); color: var(--info); border: 1px solid rgba(41,121,255,0.25); }

/* ── Toast Notifications ────────────────────────────────── */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    min-width: 280px;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
}

.toast.hide {
    animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(100px); }
}

.toast-success { background: rgba(0,200,83,0.9); color: white; }
.toast-error   { background: rgba(255,23,68,0.9); color: white; }

/* ── Comment Cards ──────────────────────────────────────── */
.comment-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 14px;
    transition: var(--transition);
}

.comment-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-sm);
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.comment-author {
    font-weight: 600;
    font-size: 14px;
}

.comment-date {
    font-size: 12px;
    color: var(--text-muted);
}

.comment-body {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
    word-wrap: break-word;
}

.comment-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.comment-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.comment-reply-form {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    display: none;
}

.comment-reply-form.show {
    display: block;
    animation: slideDown 0.3s ease;
}

.reply-input-group {
    display: flex;
    gap: 10px;
}

.reply-input-group .form-control {
    flex: 1;
}

/* ── Video Cards ────────────────────────────────────────── */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-light);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-secondary);
}

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

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

.video-stats-overlay {
    position: absolute;
    bottom: 8px;
    right: 8px;
    display: flex;
    gap: 6px;
}

.video-stats-overlay span {
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ── Channel Cards ──────────────────────────────────────── */
.channel-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.channel-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.channel-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
}

.channel-info {
    flex: 1;
}

.channel-name {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.channel-stats {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

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

/* ── Empty State ────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    margin-bottom: 20px;
}

/* ── Pagination ─────────────────────────────────────────── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 28px;
}

.pagination .btn {
    min-width: 40px;
    justify-content: center;
}

/* ── Loading Spinner ────────────────────────────────────── */
.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 20px auto;
}

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

.loading-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15,15,20,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ── Modal ──────────────────────────────────────────────── */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-backdrop.show {
    display: flex;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 32px;
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-input);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--error);
    color: white;
}

/* ── Utility ────────────────────────────────────────────── */
.flex      { display: flex; }
.flex-col  { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8   { gap: 8px; }
.gap-12  { gap: 12px; }
.gap-16  { gap: 16px; }
.gap-20  { gap: 20px; }
.mt-4    { margin-top: 4px; }
.mt-8    { margin-top: 8px; }
.mt-16   { margin-top: 16px; }
.mt-20   { margin-top: 20px; }
.mb-8    { margin-bottom: 8px; }
.mb-16   { margin-bottom: 16px; }
.mb-20   { margin-bottom: 20px; }
.text-center { text-align: center; }
.text-sm { font-size: 13px; }
.text-muted { color: var(--text-muted); }
.w-full  { width: 100%; }

/* ── Mobile Sidebar Toggle ──────────────────────────────── */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 20px;
    z-index: 200;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
        padding: 16px;
        padding-top: 72px;
    }
    .sidebar-toggle {
        display: flex;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .video-grid {
        grid-template-columns: 1fr;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .auth-card {
        padding: 24px;
        margin: 16px;
    }
}