* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* ========== User UI — Giao diện chuyên nghiệp ========== */
.user-body {
  --user-bg: #08080a;
  --user-bg-card: #121214;
  --user-bg-elevated: #18181b;
  --user-border: rgba(255,255,255,0.06);
  --user-border-hover: rgba(255,255,255,0.12);
  --user-text: #fafafa;
  --user-text-secondary: #d4d4d8;
  --user-text-muted: #71717a;
  --user-accent: #a78bfa;
  --user-accent-hover: #c4b5fd;
  --user-accent-muted: rgba(167,139,250,0.15);
  --user-radius: 14px;
  --user-radius-sm: 10px;
  --user-radius-lg: 18px;
  --user-font: 'Be Vietnam Pro', system-ui, sans-serif;
  --user-shadow: 0 8px 30px rgba(0,0,0,0.4);
  --user-shadow-hover: 0 16px 48px rgba(0,0,0,0.5);
  --user-transition: 0.25s ease;
}

body {
  margin: 0;
  font-family: var(--user-font);
  background: var(--user-bg);
  color: var(--user-text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.user-body .container { max-width: 1320px; margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ----- Header ----- */
.user-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,8,10,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--user-border);
  transition: box-shadow var(--user-transition);
}
.user-header.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.3); }
.user-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 16px 0;
}
.user-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.03em;
  transition: color var(--user-transition), opacity var(--user-transition);
}
.user-logo:hover { color: var(--user-accent); }
.user-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--user-accent), #7c3aed);
  color: #fff;
  border-radius: var(--user-radius-sm);
  font-size: 0.9rem;
}
.user-logo-text { font-weight: 700; }
.site-brand-logo-img {
  max-height: 40px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}
.site-footer-logo-img { max-height: 32px; max-width: 200px; }
.user-logo-fallback.hidden,
.user-footer-logo-fallback.hidden { display: none !important; }

.user-header-right {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  flex: 1;
  justify-content: flex-end;
  min-width: 0;
}

.user-search-wrap {
  display: flex;
  align-items: center;
  background: var(--user-bg-elevated);
  border: 1px solid var(--user-border);
  border-radius: var(--user-radius-sm);
  overflow: hidden;
  max-width: 320px;
  width: 100%;
  transition: border-color var(--user-transition), box-shadow var(--user-transition);
}
.user-search-wrap:focus-within {
  border-color: var(--user-accent);
  box-shadow: 0 0 0 3px var(--user-accent-muted);
}
.user-search-input {
  flex: 1;
  min-width: 0;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--user-text);
  font-size: 0.9375rem;
  font-family: var(--user-font);
}
.user-search-input::placeholder { color: var(--user-text-muted); }
.user-search-input:focus { outline: none; }
.user-search-btn {
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--user-text-muted);
  cursor: pointer;
  transition: color var(--user-transition);
}
.user-search-btn:hover { color: var(--user-accent); }
.user-search-icon { font-size: 1.1rem; }

.user-nav { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.user-filter-wrap { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.user-filter-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--user-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.user-filter-select {
  padding: 10px 14px;
  background: var(--user-bg-elevated);
  border: 1px solid var(--user-border);
  border-radius: var(--user-radius-sm);
  color: var(--user-text);
  font-size: 0.9rem;
  font-family: var(--user-font);
  cursor: pointer;
  min-width: 160px;
  transition: border-color var(--user-transition);
}
.user-filter-select:focus {
  outline: none;
  border-color: var(--user-accent);
}
.user-tags-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-chip {
  padding: 8px 16px;
  background: var(--user-bg-elevated);
  border: 1px solid var(--user-border);
  border-radius: 999px;
  color: var(--user-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--user-font);
  cursor: pointer;
  transition: background var(--user-transition), color var(--user-transition), border-color var(--user-transition);
}
.tag-chip:hover { background: rgba(255,255,255,0.06); color: var(--user-text); border-color: var(--user-border-hover); }
.tag-chip.active { background: var(--user-accent-muted); border-color: var(--user-accent); color: var(--user-accent); }

/* ----- Hero ----- */
.user-hero {
  background: linear-gradient(160deg, var(--user-bg-card) 0%, var(--user-bg) 60%);
  border-bottom: 1px solid var(--user-border);
  padding: 48px 0 40px;
}
.user-hero-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.03em;
  color: #fff;
}
.user-hero-desc {
  font-size: 1rem;
  color: var(--user-text-muted);
  margin: 0;
}

/* ----- Main ----- */
.user-main { min-height: calc(100vh - 200px); padding: 0 0 64px; }
.list-view .content-section { padding: 40px 0 0; }
.section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.02em;
  color: #fff;
}
.section-count {
  font-size: 0.9rem;
  color: var(--user-text-muted);
  font-weight: 500;
}

/* ----- Video grid ----- */
.video-grid-wrap { position: relative; min-height: 200px; }
.video-grid-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--user-bg);
  border-radius: var(--user-radius);
}
.video-grid-loading.hidden { display: none !important; }
.loading-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--user-border);
  border-top-color: var(--user-accent);
  border-radius: 50%;
  animation: user-spin 0.8s linear infinite;
}
@keyframes user-spin { to { transform: rotate(360deg); } }
.loading-text { margin: 0; font-size: 0.9rem; color: var(--user-text-muted); }

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (min-width: 768px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (min-width: 1100px) {
  .video-grid { grid-template-columns: repeat(4, 1fr); gap: 28px; }
}
@media (min-width: 1400px) {
  .video-grid { gap: 32px; }
}
.video-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--user-bg-card);
  border-radius: var(--user-radius);
  overflow: hidden;
  border: 1px solid var(--user-border);
  transition: transform var(--user-transition), box-shadow var(--user-transition), border-color var(--user-transition);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--user-shadow-hover);
  border-color: var(--user-border-hover);
}
.video-card-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--user-bg-elevated);
}
.video-card-thumb .thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--user-transition);
}
.video-card:hover .video-card-thumb .thumb { transform: scale(1.05); }
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.6) 100%);
  opacity: 0;
  transition: opacity var(--user-transition);
}
.video-card:hover .play-overlay { opacity: 1; }
.play-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--user-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 1.4rem;
  box-shadow: 0 8px 32px rgba(167,139,250,0.4);
  transition: transform var(--user-transition);
}
.video-card:hover .play-icon { transform: scale(1.08); }
.video-duration,
.video-views {
  position: absolute;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0,0,0,0.85);
  color: #fff;
}
.video-duration { bottom: 10px; right: 10px; }
.video-views { top: 10px; left: 10px; }
.video-card-info { padding: 18px; }
.video-card-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--user-text);
}
.video-card-meta { font-size: 0.8125rem; color: var(--user-text-muted); }

/* ----- Pagination ----- */
.user-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 48px;
}
.pagination-btn {
  padding: 12px 22px;
  background: var(--user-bg-card);
  border: 1px solid var(--user-border);
  border-radius: var(--user-radius-sm);
  color: var(--user-text);
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: var(--user-font);
  cursor: pointer;
  transition: background var(--user-transition), border-color var(--user-transition), color var(--user-transition);
}
.pagination-btn:hover { background: var(--user-bg-elevated); border-color: var(--user-border-hover); }
.pagination-info { font-size: 0.9rem; color: var(--user-text-muted); }

/* ----- Empty state ----- */
.empty-state {
  text-align: center;
  padding: 100px 24px;
}
.empty-icon { font-size: 4.5rem; margin-bottom: 20px; opacity: 0.5; }
.empty-title { font-size: 1.5rem; font-weight: 700; margin: 0 0 10px; color: var(--user-text); }
.empty-desc { font-size: 1rem; color: var(--user-text-muted); margin: 0; }

/* ----- Trang 404 ----- */
.page-404-wrap,
.page-404-view { padding: 60px 0 80px; }
.page-404 {
  text-align: center;
  max-width: 420px;
  margin: 0 auto;
}
.page-404-code {
  display: block;
  font-size: 5rem;
  font-weight: 800;
  color: var(--user-accent);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -0.04em;
}
.page-404-title { font-size: 1.5rem; font-weight: 700; margin: 0 0 12px; color: var(--user-text); }
.page-404-desc { font-size: 1rem; color: var(--user-text-muted); margin: 0 0 28px; line-height: 1.5; }
.page-404-btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--user-accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--user-font);
  border-radius: var(--user-radius-sm);
  text-decoration: none;
  transition: background var(--user-transition), transform var(--user-transition);
}
.page-404-btn:hover { background: var(--user-accent-hover); color: #fff; transform: translateY(-2px); }

/* ----- Detail view ----- */
.detail-view { padding: 32px 0 64px; }
.detail-view.hidden { display: none !important; }
.detail-view-inner { max-width: 960px; margin: 0 auto; padding: 0 24px; }

.detail-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  margin-bottom: 16px;
  color: var(--user-text-muted);
}
.detail-breadcrumb-link {
  color: var(--user-accent);
  text-decoration: none;
  transition: color var(--user-transition);
}
.detail-breadcrumb-link:hover { color: var(--user-accent-hover); }
.detail-breadcrumb-sep { opacity: 0.6; }
.detail-breadcrumb-current {
  color: var(--user-text-secondary);
  max-width: 60%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 10px 0;
  background: none;
  border: none;
  color: var(--user-accent);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--user-font);
  cursor: pointer;
  transition: color var(--user-transition);
}
.detail-back:hover { color: var(--user-accent-hover); }
.detail-back-icon { font-size: 1.1rem; }

.detail-card {
  background: var(--user-bg-card);
  border-radius: var(--user-radius-lg);
  overflow: hidden;
  border: 1px solid var(--user-border);
  box-shadow: var(--user-shadow);
}
.detail-video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  background: #000;
}
.detail-video-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}
.detail-info { padding: 32px 24px 40px; }
.detail-title {
  font-size: 1.625rem;
  font-weight: 700;
  margin: 0 0 16px;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: #fff;
}
.detail-meta {
  font-size: 0.9375rem;
  color: var(--user-text-muted);
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.detail-meta span:not(:last-child)::after { content: '•'; margin-left: 12px; opacity: 0.7; }
.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}
.detail-tags-wrap {
  margin-bottom: 24px;
}
.detail-tags-wrap.hidden { display: none !important; }
.detail-tags-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--user-text-muted);
  margin: 0 0 12px;
}
.detail-tag {
  padding: 8px 14px;
  background: var(--user-accent-muted);
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--user-accent);
  text-decoration: none;
  display: inline-block;
  transition: background var(--user-transition), color var(--user-transition);
}
a.detail-tag:hover { background: rgba(167,139,250,0.25); color: var(--user-accent-hover); }
.detail-desc-wrap { border-top: 1px solid var(--user-border); padding-top: 24px; }
.detail-desc-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--user-text-muted);
  margin: 0 0 12px;
}
.detail-desc { margin: 0; font-size: 0.9375rem; line-height: 1.7; color: var(--user-text-secondary); }

/* Related videos on detail page */
.related-section { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--user-border); }
.related-heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 24px;
  color: #fff;
  letter-spacing: -0.02em;
}
.related-videos-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 560px) {
  .related-videos-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
}
@media (min-width: 900px) {
  .related-videos-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}
.related-videos-grid .video-card { text-decoration: none; color: inherit; }
.related-empty {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--user-text-muted);
}
.related-section .video-grid-loading { padding: 24px; text-align: center; }

/* ----- Footer ----- */
.user-footer {
  background: var(--user-bg-card);
  border-top: 1px solid var(--user-border);
  padding: 40px 0;
  margin-top: auto;
}
.user-footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}
.user-footer-brand { max-width: 320px; }
.user-footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--user-accent);
  text-decoration: none;
  margin-bottom: 12px;
  transition: color var(--user-transition);
}
.user-footer-logo:hover { color: var(--user-accent-hover); }
.user-footer-logo .user-logo-icon {
  width: 28px;
  height: 28px;
  font-size: 0.75rem;
}
.user-footer-copy { margin: 0; font-size: 0.875rem; color: var(--user-text-muted); line-height: 1.5; }
.user-footer-links { display: flex; gap: 24px; }
.user-footer-links a {
  color: var(--user-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--user-transition);
}
.user-footer-links a:hover { color: var(--user-accent); }

@media (max-width: 768px) {
  .user-header-inner { flex-direction: column; align-items: stretch; }
  .user-header-right { justify-content: stretch; }
  .user-search-wrap { max-width: none; }
  .user-hero { padding: 32px 0 28px; }
  .user-hero-title { font-size: 1.5rem; }
  .video-grid { grid-template-columns: 1fr; gap: 20px; }
}

.list-view .content-section.hidden { display: none !important; }

.hidden { display: none !important; }

/* Admin */
.admin-body { background: #141414; }
.admin-header { background: #1a1a1a; padding: 16px 0; border-bottom: 1px solid #2a2a2a; }
.admin-header .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.admin-header h1 { margin: 0; font-size: 1.25rem; }
.admin-auth { display: flex; gap: 8px; }
.admin-auth input { background: #2a2a2a; border: 1px solid #3a3a3a; color: #e5e5e5; padding: 8px 12px; border-radius: 6px; width: 200px; }
.btn { padding: 10px 18px; border-radius: 6px; border: none; cursor: pointer; font-size: 14px; font-weight: 500; }
.btn-primary { background: #6a4a7c; color: #fff; }
.btn-primary:hover { background: #7a5a8c; }
.btn-secondary { background: #3a3a3a; color: #e5e5e5; }
.btn-secondary:hover { background: #4a4a4a; }
.btn-danger { background: #8b3a3a; color: #fff; padding: 6px 12px; font-size: 13px; }
.btn-danger:hover { background: #9b4a4a; }
.btn-edit { background: #3a5a7a; color: #fff; padding: 6px 12px; font-size: 13px; margin-right: 6px; }
.btn-edit:hover { background: #4a6a8a; }

.admin-main { padding: 24px 0; }
.admin-actions { margin-bottom: 20px; }
.form-section { background: #1a1a1a; padding: 24px; border-radius: 10px; margin-bottom: 24px; border: 1px solid #2a2a2a; }
.form-section h2 { margin: 0 0 20px; font-size: 1.1rem; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 13px; color: #aaa; }
.form-group input, .form-group textarea { width: 100%; max-width: 500px; background: #2a2a2a; border: 1px solid #3a3a3a; color: #e5e5e5; padding: 10px 12px; border-radius: 6px; font-size: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 700px) { .form-row { grid-template-columns: 1fr; } }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }
.message { padding: 12px; border-radius: 6px; margin-bottom: 16px; }
.message.success { background: #2a4a2a; color: #9fdf9f; }
.message.error { background: #4a2a2a; color: #df9f9f; }

.data-table { width: 100%; border-collapse: collapse; background: #1a1a1a; border-radius: 10px; overflow: hidden; border: 1px solid #2a2a2a; }
.data-table th, .data-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid #2a2a2a; }
.data-table th { background: #222; font-size: 12px; text-transform: uppercase; color: #888; }
.data-table td { font-size: 14px; }
.data-table img { width: 60px; height: 34px; object-fit: cover; border-radius: 4px; }
.table-section { overflow-x: auto; }

/* ========== Admin chuyên nghiệp ========== */
:root {
  --bg: #0a0a0b;
  --bg-elevated: #141416;
  --bg-card: #1a1a1d;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --accent: #8b5cf6;
  --accent-hover: #9d6ef7;
  --accent-muted: rgba(139,92,246,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --font: 'Be Vietnam Pro', system-ui, sans-serif;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --transition: 0.2s ease;
}

.admin-body { background: #0c0c0e; font-family: var(--font); min-height: 100vh; color: var(--text); }

/* ----- Login ----- */
.admin-login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(160deg, #0c0c0e 0%, #141418 50%, #0f0f12 100%);
}
.admin-login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}
.admin-login-header { text-align: center; margin-bottom: 32px; }
.admin-login-logo {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.admin-login-header h1 { margin: 0 0 6px; font-size: 1.35rem; color: #fff; font-weight: 600; }
.admin-login-header p { margin: 0; font-size: 0.9rem; color: var(--text-muted); }
.admin-login-form .form-group { margin-bottom: 20px; }
.admin-login-form .form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}
.admin-login-form input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.admin-login-form input::placeholder { color: var(--text-muted); opacity: 0.7; }
.admin-login-form input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
}
.login-error {
  color: #fda4af;
  font-size: 0.875rem;
  margin-bottom: 16px;
  padding: 10px 12px;
  background: rgba(225,29,72,0.1);
  border-radius: var(--radius-sm);
}
.btn-block { width: 100%; padding: 12px 16px; font-size: 1rem; font-weight: 600; border-radius: var(--radius-sm); }

/* ----- Dashboard layout ----- */
.admin-dashboard { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.admin-sidebar-header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
}
.admin-sidebar-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.02em;
}
.admin-brand-logo-img {
  max-height: 36px;
  max-width: 200px;
  width: auto;
  object-fit: contain;
  display: block;
}
#adminLoginLogoFallback.hidden,
#adminSidebarLogoFallback.hidden { display: none !important; }
.admin-sidebar-title { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; display: block; text-transform: uppercase; letter-spacing: 0.06em; }
.admin-sidebar-nav { flex: 1; padding: 20px 0; }
.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 24px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.admin-nav-item:hover { background: rgba(255,255,255,0.04); color: #fff; }
.admin-nav-item.active {
  background: var(--accent-muted);
  color: var(--accent);
  border-right: 3px solid var(--accent);
}
.admin-nav-icon { font-size: 1.15rem; opacity: 0.9; }
.admin-sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
}
.admin-user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  padding: 8px 0;
}
.admin-user-icon { opacity: 0.8; font-size: 1.1rem; }
.admin-logout-btn {
  width: 100%;
  padding: 10px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.admin-logout-btn:hover { background: rgba(255,255,255,0.06); color: #fff; }

/* ----- Topbar ----- */
.admin-main-wrap { flex: 1; display: flex; flex-direction: column; min-width: 0; background: var(--bg); }
.admin-topbar {
  padding: 0 32px;
  min-height: 64px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}
.admin-topbar-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.admin-topbar-title { margin: 0; font-size: 1.25rem; font-weight: 600; color: #fff; letter-spacing: -0.02em; }

/* ----- Content ----- */
.admin-content { padding: 28px 32px 40px; flex: 1; }

/* Message */
.admin-content .message {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
}
.admin-content .message.success {
  background: rgba(34,197,94,0.15);
  color: #86efac;
  border: 1px solid rgba(34,197,94,0.3);
}
.admin-content .message.error {
  background: rgba(225,29,72,0.15);
  color: #fda4af;
  border: 1px solid rgba(225,29,72,0.3);
}

/* ----- Stats ----- */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
@media (max-width: 640px) { .admin-stats { grid-template-columns: 1fr; } }
.admin-stats .stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.admin-stats .stat-card:hover { border-color: var(--border-light); box-shadow: var(--shadow); }
.admin-stats .stat-icon {
  display: block;
  font-size: 1.5rem;
  margin-bottom: 12px;
  opacity: 0.9;
}
.admin-stats .stat-card-video .stat-icon { color: var(--accent); }
.admin-stats .stat-card-cat .stat-icon { color: #22c55e; }
.admin-stats .stat-card-tag .stat-icon { color: #3b82f6; }
.admin-stats .stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: -0.03em;
}
.admin-stats .stat-label { font-size: 0.8125rem; color: var(--text-muted); font-weight: 500; }

/* ----- Table section ----- */
.admin-table-section {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.admin-toolbar {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.admin-toolbar-title { margin: 0; font-size: 1.0625rem; font-weight: 600; color: #fff; }
.admin-body .btn { padding: 10px 18px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 500; font-family: var(--font); transition: background var(--transition), transform 0.15s; }
.admin-body .btn:hover { transform: translateY(-1px); }
.admin-body .btn:active { transform: translateY(0); }
.admin-body .btn-primary { background: var(--accent); color: #fff; border: none; cursor: pointer; }
.admin-body .btn-primary:hover { background: var(--accent-hover); }
.admin-body .btn-secondary { background: rgba(255,255,255,0.06); color: var(--text); border: 1px solid var(--border); cursor: pointer; }
.admin-body .btn-secondary:hover { background: rgba(255,255,255,0.1); }
.btn-icon { margin-right: 6px; font-weight: 600; }

.table-wrapper { overflow-x: auto; }
.admin-data-table { width: 100%; border-collapse: collapse; }
.admin-data-table th,
.admin-data-table td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--border); }
.admin-data-table th {
  background: rgba(0,0,0,0.25);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.admin-data-table tbody tr { transition: background var(--transition); }
.admin-data-table tbody tr:hover { background: rgba(255,255,255,0.02); }
.admin-data-table .col-thumb { width: 80px; }
.admin-data-table .table-thumb {
  width: 72px;
  height: 40px;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}
.admin-data-table .col-title { min-width: 180px; }
.admin-data-table .col-cat { min-width: 100px; color: var(--text-muted); font-size: 0.875rem; }
.admin-data-table .col-tags { min-width: 120px; color: var(--text-muted); font-size: 0.875rem; }
.admin-data-table .col-views { width: 90px; color: var(--text-muted); font-size: 0.875rem; }
.admin-data-table .col-actions { width: 140px; }
.action-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.admin-data-table .btn-edit { background: #334155; color: #e2e8f0; padding: 6px 12px; font-size: 0.8125rem; border: none; border-radius: 6px; cursor: pointer; }
.admin-data-table .btn-edit:hover { background: #475569; }
.admin-data-table .btn-danger { background: rgba(185,28,28,0.4); color: #fca5a5; padding: 6px 12px; font-size: 0.8125rem; border: none; border-radius: 6px; cursor: pointer; }
.admin-data-table .btn-danger:hover { background: rgba(185,28,28,0.6); }
.admin-data-table .empty-cell { text-align: center; color: var(--text-muted); padding: 48px 20px !important; font-size: 0.9rem; }

.admin-content .pagination {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: rgba(0,0,0,0.15);
}
.admin-content .pagination .page-info { padding: 0 8px; font-size: 0.875rem; color: var(--text-muted); }
.admin-content .pagination button {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--transition);
}
.admin-content .pagination button:hover { background: rgba(255,255,255,0.08); }

/* ----- Form section ----- */
.admin-form-section { max-width: 720px; }
.admin-form-toolbar {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.admin-form-toolbar .btn-secondary { padding: 8px 14px; font-size: 0.875rem; }
.video-form-page-title { margin: 0; font-size: 1.2rem; font-weight: 600; color: #fff; }
.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.admin-card-form { padding: 32px; }
.admin-card-form .form-row { grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 600px) { .admin-card-form .form-row { grid-template-columns: 1fr; } }
.admin-card-form .form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}
.admin-card-form .form-group input,
.admin-card-form .form-group textarea,
.admin-card-form .form-group select {
  width: 100%;
  padding: 11px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9375rem;
  font-family: var(--font);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.admin-card-form .form-group input:focus,
.admin-card-form .form-group textarea:focus,
.admin-card-form .form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
}
.admin-card-form .form-actions { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.form-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 6px; display: block; }
.input-multi { min-height: 100px; padding: 8px !important; }

/* Account */
.admin-account-section { max-width: 440px; }
.admin-card-title { margin: 0 0 8px; font-size: 1.1rem; font-weight: 600; color: #fff; }
.admin-card-desc { margin: 0 0 24px; font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }
.admin-account-form .form-group input.readonly { background: rgba(255,255,255,0.05); cursor: default; color: var(--text-muted); }
.form-actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.form-actions-end { justify-content: flex-end; }

/* Import section */
.admin-import-section .admin-card { max-width: 720px; }
.admin-import-section .form-control {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9rem;
  font-family: inherit;
}
.admin-import-section .form-control:focus {
  outline: none;
  border-color: var(--accent);
}
.admin-import-section textarea.form-control { min-height: 160px; resize: vertical; }

.admin-seo-section .form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
}
.admin-seo-section .form-control:focus {
  outline: none;
  border-color: var(--accent);
}
.admin-seo-section textarea.form-control { min-height: 72px; resize: vertical; }
.import-result {
  margin-top: 20px;
  padding: 14px 18px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}
.import-result.has-errors { border-color: rgba(239,68,68,0.5); }
.import-result .import-details { margin-top: 10px; font-size: 0.85rem; color: var(--text-muted); }
.import-result .import-error { color: #f87171; }

.import-history-card { margin-top: 24px; }
.import-history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}
.import-history-head .btn { flex-shrink: 0; }
.import-history-empty {
  padding: 16px;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.import-history-wrap { overflow-x: auto; margin-top: 12px; }
.import-history-table { font-size: 0.8125rem; }
.import-history-table th,
.import-history-table td { white-space: nowrap; }
.import-history-table td.import-history-source {
  white-space: normal;
  max-width: 180px;
  word-break: break-word;
}
.import-history-table details { cursor: pointer; }
.import-history-table .import-history-detail-body {
  margin-top: 8px;
  padding: 10px;
  background: rgba(0,0,0,0.25);
  border-radius: 6px;
  font-size: 0.75rem;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 220px;
  overflow-y: auto;
  text-align: left;
}
.import-history-pagination {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.import-history-pagination button:disabled { opacity: 0.45; cursor: not-allowed; }

/* ----- Admin SEO ----- */
.admin-seo-section .seo-env-hint { margin-top: 8px; font-size: 0.875rem; }
.seo-env-pre {
  margin-top: 12px;
  padding: 12px 14px;
  background: rgba(0,0,0,0.35);
  border-radius: 8px;
  font-size: 0.75rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-muted);
}
.seo-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.seo-tab {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-size: 0.8125rem;
  font-family: inherit;
  cursor: pointer;
}
.seo-tab:hover { background: rgba(255,255,255,0.08); }
.seo-tab.active {
  border-color: var(--accent);
  background: rgba(99,102,241,0.15);
  color: var(--text);
}
.seo-template-help {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.45;
}
.admin-seo-section .seo-panel { margin-bottom: 8px; }
.admin-seo-section .seo-panel.hidden { display: none !important; }
.seo-subheading {
  margin: 20px 0 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-muted);
}
.seo-check label { display: flex; align-items: center; gap: 10px; cursor: pointer; font-weight: 400; }
.seo-check input { width: auto; }
.seo-save-actions { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); }

.seo-url-with-upload {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 10px;
}
.seo-url-with-upload .form-control {
  flex: 1;
  min-width: 180px;
}
.seo-url-with-upload .seo-upload-btn {
  flex-shrink: 0;
  align-self: center;
  white-space: nowrap;
  padding: 10px 16px;
  font-size: 0.875rem;
}

.admin-view-stats-section input.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
}
.admin-view-stats-section input.form-control:focus {
  outline: none;
  border-color: var(--accent);
}

.admin-view-stats-section .view-stats-filters {
  align-items: flex-end;
  margin-bottom: 16px;
}
.admin-view-stats-section .view-stats-filter-actions {
  display: flex;
  align-items: flex-end;
  padding-bottom: 2px;
}
.view-stats-total-line {
  font-size: 0.9375rem;
  margin-bottom: 12px;
  color: var(--text-muted);
}
.view-logs-table-wrap { overflow-x: auto; margin-top: 12px; }
.view-logs-table { font-size: 0.8125rem; }
.view-logs-table td { vertical-align: top; }
.view-logs-table .col-ua {
  max-width: 260px;
  word-break: break-word;
  color: var(--text-muted);
  font-size: 0.75rem;
}
.view-stats-logs-pagination {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* ----- Modals ----- */
.admin-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.admin-modal.hidden { display: none !important; }
.admin-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(4px);
  cursor: pointer;
}
.admin-modal-content {
  position: relative;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.admin-modal-sm { max-width: 420px; }
.admin-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.admin-modal-header h3 { margin: 0; font-size: 1.125rem; font-weight: 600; color: #fff; }
.admin-modal-close {
  width: 38px;
  height: 38px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.admin-modal-close:hover { background: rgba(255,255,255,0.08); color: #fff; }
.admin-modal-body { padding: 24px; }
.admin-modal-body .form-group input {
  padding: 11px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 0.9375rem;
  width: 100%;
}
.admin-modal-body .form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-muted);
}

/* Categories/Tags tables in admin */
.admin-table-section .data-table th,
.admin-table-section .data-table td { padding: 12px 20px; }
.admin-table-section .data-table th {
  background: rgba(0,0,0,0.25);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.admin-table-section .data-table code { background: rgba(255,255,255,0.08); padding: 2px 8px; border-radius: 4px; font-size: 0.8125rem; }

@media (max-width: 768px) {
  .admin-dashboard { flex-direction: column; }
  .admin-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; justify-content: space-between; padding: 12px 16px; }
  .admin-sidebar-header { padding: 0; border: none; }
  .admin-sidebar-nav { order: 3; width: 100%; padding: 12px 0; border-top: 1px solid var(--border); }
  .admin-sidebar-footer { width: 100%; flex-direction: row; justify-content: space-between; align-items: center; padding: 12px 0; border: none; }
  .admin-content { padding: 20px 16px; }
  .admin-topbar { padding: 0 20px; min-height: 56px; }
}