/* ===== AUTH / PORTAL / ADMIN - dùng chung với style.css ===== */

/* Ép font tiêu đề sang font hỗ trợ tiếng Việt đầy đủ, áp dụng cho MỌI thẻ
   h1-h4 kể cả không có class riêng - tránh lỗi hiển thị dấu (VD: "cầu") */
h1, h2, h3, h4 {
  font-family: 'Be Vietnam Pro', sans-serif;
}

/* Web gốc ẩn .btn-header trên điện thoại (dùng menu 3 gạch riêng thay thế),
   nhưng trang khu vực học viên không có menu đó - nên hiện lại 2 nút này
   trên điện thoại, chỉ thu nhỏ lại cho vừa màn hình. */
.portal-header-actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}
.portal-menu-wrap { position: relative; }
.portal-menu-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--foreground);
  cursor: pointer;
  white-space: nowrap;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.portal-menu-btn:hover { border-color: var(--primary); }
.portal-menu-caret { font-size: 0.7rem; color: var(--muted); flex-shrink: 0; }
.portal-menu-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  min-width: 230px;
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 60;
}
.portal-menu-dropdown.open { display: flex; }
.portal-menu-dropdown a {
  padding: 12px 18px;
  font-size: 0.88rem;
  color: var(--foreground);
  border-bottom: 1px solid var(--border);
}
.portal-menu-dropdown a:last-child { border-bottom: none; }
.portal-menu-dropdown a:hover { background: var(--bg-secondary); }
.portal-menu-dropdown a.portal-menu-logout { color: #e74c3c; }

@media (max-width: 768px) {
  .portal-menu-btn { max-width: 150px; font-size: 0.8rem; padding: 7px 12px; }
}

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: var(--bg);
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px 36px;
  box-shadow: var(--shadow-soft-lg);
  text-align: center;
}
.auth-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}
.auth-logo img { height: 42px; width: auto; border-radius: 8px; }
.auth-logo span {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-weight: 700;
  color: var(--foreground);
}
.auth-title {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--foreground);
  margin-bottom: 8px;
}
.auth-subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}
.auth-alert {
  background: rgba(216,107,128,0.1);
  border: 1px solid rgba(216,107,128,0.3);
  color: var(--primary-dark);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  margin-bottom: 20px;
  text-align: left;
}
.auth-alert-success {
  background: rgba(39,174,96,0.1);
  border-color: rgba(39,174,96,0.3);
  color: #27ae60;
}
.auth-form { text-align: left; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--foreground);
  margin-bottom: 6px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  color: var(--foreground);
  background: var(--bg-white);
  transition: border-color 0.2s;
}
.form-group input[type="checkbox"],
.form-group input[type="radio"] {
  appearance: auto;
  -webkit-appearance: auto;
  width: 18px;
  height: 18px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  accent-color: var(--primary);
  flex-shrink: 0;
  cursor: pointer;
}
.form-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  padding: 0;
  border-radius: 4px;
  accent-color: var(--primary);
  flex-shrink: 0;
  cursor: pointer;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}
.auth-note {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
}
.auth-note a { color: var(--primary); font-weight: 600; }
.auth-back {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--muted);
}
.auth-back:hover { color: var(--primary); }

/* ===== PORTAL (khu vực học viên) ===== */
/* ===== MỤC LỤC (nút 3 gạch + bảng trượt) ===== */
.toc-toggle {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 60;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 1.4rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.toc-toggle:hover { background: var(--primary-dark); }
.toc-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 70;
  display: none;
}
.toc-overlay.open { display: block; }
.toc-panel {
  position: fixed;
  top: 0;
  left: -300px;
  width: 280px;
  max-width: 80vw;
  height: 100%;
  background: var(--bg-white);
  z-index: 80;
  transition: left 0.25s ease;
  overflow-y: auto;
  box-shadow: 4px 0 24px rgba(0,0,0,0.15);
}
.toc-panel.open { left: 0; }
.toc-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  font-family: 'Be Vietnam Pro', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
}
.toc-close {
  background: none;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--muted);
}
.toc-panel-body { padding: 8px 12px 24px; }

/* ===== ADMIN: tìm kiếm, chọn nhiều, đặt lại mật khẩu, cây tài liệu ===== */
.admin-bulk-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(216,107,128,0.08);
  border: 1px solid rgba(216,107,128,0.25);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  flex-wrap: wrap;
}
.action-danger-btn { color: #e74c3c !important; border-color: #e74c3c !important; }
.action-danger-btn:hover { background: rgba(231,76,60,0.08); }

.admin-reset-pw { margin-top: 8px; }
.admin-reset-pw form { display: flex; gap: 6px; }
.admin-reset-pw input {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.8rem;
}

.adm-tree { margin-bottom: 24px; }
.adm-leaf {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 30px;
  border-radius: 8px;
  font-size: 0.88rem;
}
.adm-leaf:hover { background: var(--bg-secondary); }
.adm-leaf-icon { flex-shrink: 0; }
.adm-leaf-title { flex: 1; color: var(--foreground); }
.adm-leaf-action { font-size: 0.8rem; color: var(--primary); white-space: nowrap; }
.adm-leaf-action-danger { font-size: 0.8rem; color: #e74c3c; white-space: nowrap; }

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.admin-stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.admin-stat-card.admin-stat-warn { background: rgba(217,138,31,0.08); border-color: rgba(217,138,31,0.3); }
.admin-stat-card.admin-stat-online { background: rgba(39,174,96,0.08); border-color: rgba(39,174,96,0.3); }
.admin-stat-num { font-size: 1.6rem; font-weight: 700; color: var(--primary-dark); font-family: 'Be Vietnam Pro', sans-serif; }
.admin-stat-label { font-size: 0.78rem; color: var(--muted); line-height: 1.4; }

.admin-reset-requests {
  background: rgba(217,138,31,0.08);
  border: 1px solid rgba(217,138,31,0.3);
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 24px;
}
.admin-reset-request-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 0;
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.adm-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.88rem;
}
.adm-row:hover { background: var(--bg-secondary); }
.adm-row-highlight {
  background: rgba(216,107,128,0.15) !important;
  box-shadow: 0 0 0 2px var(--primary);
  transition: background 0.3s, box-shadow 0.3s;
}
.adm-row-hidden { opacity: 0.55; }
.adm-row-hidden .adm-leaf-title em { color: #e74c3c; font-style: normal; font-size: 0.78rem; font-weight: 600; }
.adm-row input[type="checkbox"] { flex-shrink: 0; }

.toc-node {
  border: none;
  margin: 0 0 2px;
}
.toc-node > summary {
  list-style: none;
  cursor: pointer;
  padding: 9px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--foreground);
  user-select: none;
}
.toc-node > summary::-webkit-details-marker { display: none; }
.toc-node > summary::before {
  content: '▸';
  font-size: 0.65rem;
  color: var(--muted);
  transition: transform 0.15s;
  flex-shrink: 0;
}
.toc-node[open] > summary::before { transform: rotate(90deg); }
.toc-node > summary:hover { background: var(--bg-secondary); }
.toc-node .toc-node { padding-left: 14px; }

.toc-link {
  display: block;
  padding: 8px 10px 8px 30px;
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--foreground);
}
.toc-link:hover { background: var(--bg-secondary); color: var(--primary); }
.toc-empty {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 4px 10px 4px 30px;
}

/* Tiêu đề khóa học ở cấp cao nhất của mục lục nổi bật hơn 1 chút */
.toc-panel-body > .toc-node > summary {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  color: var(--primary-dark);
}
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--foreground);
  margin: 40px 0 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}
.portal-course-title:first-of-type { margin-top: 0; }

.portal-section-title {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 28px 0 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.collapse-arrow, .collapse-arrow-sm {
  font-size: 0.75rem;
  color: var(--muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.portal-section-block.collapsed .collapse-arrow { transform: rotate(-90deg); }
.portal-section-block.collapsed > *:not(.portal-section-title) { display: none; }

.portal-library-heading {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--foreground);
  margin: 18px 0 6px;
}

.portal-heading {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--foreground);
  margin: 40px 0 16px;
}

.bt-guide-box {
  background: #fff8e6;
  border: 1px solid rgba(217,138,31,0.3);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #6b4a12;
  margin-bottom: 18px;
}
.bt-scan-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 8px;
}
.bt-scan-box summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary-dark);
}

.bt-celebrate-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(255,240,244,0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.bt-celebrate-flowers { position: absolute; inset: 0; pointer-events: none; }
.bt-cf { position: absolute; animation: btFloat 4s ease-in-out infinite; opacity: 0.9; }
@keyframes btFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-16px) rotate(8deg); }
}
.bt-celebrate-card {
  position: relative;
  z-index: 2;
  background: #fff;
  border-radius: 24px;
  padding: 40px 36px;
  max-width: 460px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(216,107,128,0.3);
}
.bt-celebrate-icon { font-size: 3rem; margin-bottom: 12px; }
.bt-celebrate-card h2 {
  font-family: 'Be Vietnam Pro', sans-serif;
  color: var(--primary-dark);
  margin-bottom: 16px;
}
.bt-celebrate-card p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--foreground);
  margin-bottom: 24px;
  font-style: italic;
}

.tb-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.tb-modal-card {
  background: #fff;
  border-radius: 22px;
  padding: 36px 32px;
  max-width: 440px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  border-top: 5px solid #e67e22;
}
.tb-modal-icon { font-size: 2.6rem; margin-bottom: 10px; }
.tb-modal-card h2 {
  font-family: 'Be Vietnam Pro', sans-serif;
  color: #c8660f;
  margin-bottom: 14px;
}
.tb-modal-card p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--foreground);
  margin-bottom: 22px;
}

.countdown-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 24px; }
.countdown-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, #fff0f4, #ffe0e9);
  border: 1px solid rgba(216,107,128,0.25);
  border-radius: 16px;
  padding: 14px 22px;
}
.countdown-box.countdown-warn {
  background: linear-gradient(135deg, #fff3e6, #ffe2c2);
  border-color: rgba(230,126,34,0.35);
}
.countdown-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-dark);
  font-family: 'Be Vietnam Pro', sans-serif;
  line-height: 1;
}
.countdown-box.countdown-warn .countdown-num { color: #d9720a; }
.countdown-text { font-size: 0.85rem; color: var(--foreground); line-height: 1.4; }
.countdown-text small { color: var(--muted); }

.portal-search {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 0.95rem;
  margin-bottom: 32px;
  background: var(--bg-white);
}
.portal-search:focus { outline: none; border-color: var(--primary); }

.portal-subheading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin: 20px 0 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.portal-group.collapsed .collapse-arrow-sm { transform: rotate(-90deg); }
.portal-group.collapsed .portal-list { display: none; }
.collapse-arrow-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 2px 6px;
  transition: transform 0.2s ease;
}
.portal-group.collapsed .collapse-arrow-btn { transform: rotate(-90deg); }
.portal-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.portal-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  transition: background 0.15s, transform 0.15s;
}
.portal-row:hover {
  background: var(--bg-secondary);
  transform: translateX(2px);
}
.portal-row-highlight {
  background: rgba(216,107,128,0.15) !important;
  box-shadow: 0 0 0 2px var(--primary);
  transition: background 0.3s, box-shadow 0.3s;
}
.portal-row-icon { font-size: 1.2rem; flex-shrink: 0; }
.portal-row-body { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.portal-row-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--foreground);
}
.portal-row-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 3px;
  line-height: 1.5;
}
.portal-row-meta {
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
}
.portal-row-arrow { color: var(--primary); font-size: 1.2rem; }
.portal-empty { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
#contentTree .portal-empty { padding-left: 30px; margin-bottom: 8px; }

/* ===== TRANG XEM RIÊNG (xem-noidung.php) ===== */
.viewer-page {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}
.viewer-topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 24px;
  background: #111;
  color: #fff;
  flex-wrap: wrap;
  flex-shrink: 0;
}
.viewer-topbar-video {
  padding: 8px 20px;
}
.viewer-back { color: #fff; font-size: 0.9rem; opacity: 0.8; }
.viewer-back:hover { opacity: 1; }
.viewer-title { font-size: 0.95rem; font-weight: 600; display: flex; align-items: center; gap: 8px; flex: 1; }
.viewer-title em { color: #aaa; font-style: normal; font-size: 0.85rem; }
.viewer-original-link { display: none; }
.viewer-download-btn {
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--primary);
  padding: 8px 16px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}
.viewer-download-btn:hover { background: var(--primary-dark); }
.viewer-note {
  position: relative;
  z-index: 20;
  background-color: #fff8e6 !important;
  color: #333333 !important;
  border-bottom: 1px solid rgba(0,0,0,0.08);
  flex-shrink: 0;
}
.viewer-note-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 24px;
  background: none;
  color: #333333;
  font-size: 0.9rem;
  cursor: pointer;
  text-align: left;
}
.viewer-note-toggle:hover { background: rgba(0,0,0,0.03); }
.viewer-note-arrow { font-size: 0.75rem; color: #b8305a; flex-shrink: 0; margin-left: 12px; }
.viewer-note-body {
  padding: 0 24px 14px;
  font-size: 0.9rem;
  line-height: 1.6;
}
.viewer-note strong { color: #b8305a !important; }
.viewer-frame-wrap { position: relative; flex: 1; min-height: 0; }

/* Nút toàn màn hình riêng của web */
.viewer-fs-btn {
  position: absolute;
  bottom: 110px;
  right: 14px;
  z-index: 10;
  width: 44px;
  height: 36px;
  border: none;
  border-radius: 6px;
  background: rgba(0,0,0,0.25);
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  text-shadow: 0 1px 3px rgba(0,0,0,0.9);
  opacity: 1;
}
.viewer-fs-btn:hover { background: rgba(0,0,0,0.5); }

/* Khi khung chứa vào toàn màn hình: video phủ kín, lớp che vẫn nằm đúng vị trí tương ứng */
.viewer-frame-wrap:fullscreen,
.viewer-frame-wrap:-webkit-full-screen,
.viewer-frame-wrap:-moz-full-screen,
.viewer-frame-wrap:-ms-fullscreen {
  width: 100vw;
  height: 100vh;
  background: #000;
}
.viewer-frame-wrap:fullscreen .viewer-frame,
.viewer-frame-wrap:-webkit-full-screen .viewer-frame,
.viewer-frame-wrap:-moz-full-screen .viewer-frame,
.viewer-frame-wrap:-ms-fullscreen .viewer-frame {
  width: 100%;
  height: 100%;
}
/* Ở toàn màn hình, thanh điều khiển YouTube to hơn hẳn nên nới rộng lớp che theo tỉ lệ màn hình */
.viewer-frame-wrap:fullscreen .viewer-blocker-video-top,
.viewer-frame-wrap:-webkit-full-screen .viewer-blocker-video-top {
  height: 12vh;
  right: 22vh;
  max-width: none;
}
.viewer-frame-wrap:fullscreen .viewer-blocker-video-left,
.viewer-frame-wrap:-webkit-full-screen .viewer-blocker-video-left {
  height: 7vh;
  width: 26vw;
  max-width: none;
}
.viewer-frame-wrap:fullscreen .viewer-blocker-video-right,
.viewer-frame-wrap:-webkit-full-screen .viewer-blocker-video-right {
  height: 7vh;
  width: 26vw;
  max-width: none;
}
.viewer-frame-wrap:fullscreen .viewer-fs-btn,
.viewer-frame-wrap:-webkit-full-screen .viewer-fs-btn {
  bottom: 90px;
  right: 30px;
  width: 56px;
  height: 44px;
  font-size: 1.9rem;
}

.viewer-blocker {
  position: absolute;
  top: 0;
  right: 0;
  width: 72px;
  height: 72px;
  z-index: 5;
  background: transparent;
  cursor: default;
}
.viewer-blocker-bottom {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 160px;
  height: 40px;
  z-index: 5;
  background: transparent;
  cursor: default;
}
.viewer-blocker-dots {
  position: absolute;
  bottom: 0;
  left: 118px;
  width: 55px;
  height: 40px;
  z-index: 5;
  background: transparent;
  cursor: default;
}
.viewer-blocker-video-left {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 22%;
  max-width: 230px;
  height: 72px;
  z-index: 6;
  background: transparent;
  cursor: default;
}
.viewer-blocker-video-right {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 22%;
  max-width: 230px;
  height: 72px;
  z-index: 6;
  background: transparent;
  cursor: default;
}
.viewer-blocker-video-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 150px;
  height: 70px;
  z-index: 6;
  background: transparent;
  cursor: default;
}
.viewer-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: none;
}
.viewer-error {
  color: #fff;
  text-align: center;
  padding: 80px 24px;
  font-size: 1rem;
  line-height: 1.7;
}

/* ===== ADMIN ===== */
.admin-wrap { padding: 40px 24px 80px; max-width: 1100px; }
.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.admin-topbar .btn,
.admin-topbar a.btn,
.admin-topbar button.btn {
  white-space: nowrap;
  flex-shrink: 0;
}
.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 48px;
}
.admin-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.admin-card h2 {
  font-size: 1.05rem;
  font-family: 'Be Vietnam Pro', sans-serif;
  margin-bottom: 16px;
}
.mvc-quill-editor { background: #fff; border-radius: 0 0 10px 10px; }
.mvc-quill-editor .ql-editor { min-height: 180px; font-size: 0.95rem; font-family: inherit; }
.ql-toolbar.ql-snow { border-radius: 10px 10px 0 0; border-color: var(--border) !important; }
.ql-container.ql-snow { border-color: var(--border) !important; border-radius: 0 0 10px 10px; }
.admin-section-title {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 1.2rem;
  margin: 32px 0 12px;
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.9rem;
}
.admin-table th, .admin-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.admin-table th { background: var(--bg-secondary); color: var(--muted); font-size: 0.8rem; text-transform: uppercase; }
.admin-table a { color: var(--primary); font-weight: 600; }
.tag-active { color: #27ae60; font-weight: 600; }
.tag-inactive { color: #e74c3c; font-weight: 600; }
.tag-pending-inline { color: #d98a1f; font-weight: 600; }
.course-badge-on, .course-badge-off {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 4px;
}
.course-badge-on { background: rgba(39,174,96,0.12); color: #27ae60; }
.course-badge-off { background: rgba(231,76,60,0.08); color: #e74c3c; }
.course-badge-on:hover, .course-badge-off:hover { opacity: 0.75; }
.tag-pending {
  display: inline-block;
  margin-left: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #d98a1f;
  background: rgba(217,138,31,0.12);
  padding: 4px 12px;
  border-radius: 999px;
  vertical-align: middle;
}
.action-approve { color: #27ae60 !important; }

@media (max-width: 768px) {
  .admin-grid { grid-template-columns: 1fr; }
  .admin-table { font-size: 0.8rem; }
}