/* ─── CSS Variables ─────────────────────────────────────────────────────── */
:root {
  --bg: #0a0a0a;
  --bg2: #111111;
  --bg3: #1a1a1a;
  --bg4: #222222;
  --border: #2a2a2a;
  --border2: #333333;
  --text: #e0e0e0;
  --text2: #aaaaaa;
  --text3: #666666;
  --red: #cc0000;
  --red-bright: #e53935;
  --red-dim: #8b0000;
  --red-glow: rgba(204,0,0,0.25);
  --green: #4caf50;
  --yellow: #f9a825;
  --blue: #42a5f5;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --nav-h: 60px;
  --transition: 0.2s ease;
}

/* ─── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--red-bright); text-decoration: none; transition: color var(--transition); }
a:hover { color: #ff6b6b; }
input, textarea, button, select { font-family: inherit; font-size: inherit; }
img { max-width: 100%; display: block; }

/* ─── Home Page ─────────────────────────────────────────────────────────── */
.home-page {
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.home-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  text-align: center;
  padding: 2rem;
}
.home-logo-wrap { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.home-logo {
  font-size: clamp(4rem, 14vw, 9rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--red);
  text-shadow:
    0 0 40px rgba(204,0,0,0.7),
    0 0 100px rgba(204,0,0,0.3),
    0 2px 6px rgba(0,0,0,0.9);
  line-height: 1;
  user-select: none;
}
.home-tagline {
  color: var(--text3);
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.btn-start {
  display: inline-block;
  padding: 1rem 3.5rem;
  background: var(--red);
  color: #fff;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 50px;
  border: 2px solid var(--red);
  transition: all 0.3s ease;
  cursor: pointer;
}
.btn-start:hover {
  background: transparent;
  color: var(--red);
  box-shadow: 0 0 30px var(--red-glow), 0 0 60px rgba(204,0,0,0.15);
  transform: translateY(-2px);
}

/* ─── Login Page ────────────────────────────────────────────────────────── */
.login-page {
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-wrap {
  width: 100%;
  max-width: 420px;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.login-logo {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--red);
  letter-spacing: -0.02em;
  text-shadow: 0 0 20px var(--red-glow);
}
.login-logo:hover { color: var(--red-bright); }
.login-card {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}
.login-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.login-form .form-group { margin-bottom: 1rem; }

/* ─── Navbar ────────────────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 1.5rem;
}
.nav-logo {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--red);
  letter-spacing: -0.02em;
  text-shadow: 0 0 12px var(--red-glow);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--red-bright); }
.nav-search-form {
  flex: 1;
  max-width: 400px;
  display: flex;
  align-items: center;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: 50px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.nav-search-form:focus-within { border-color: var(--red); }
.nav-search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}
.nav-search-input::placeholder { color: var(--text3); }
.nav-search-btn {
  background: none;
  border: none;
  color: var(--text2);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}
.nav-search-btn:hover { color: var(--red); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
  flex-shrink: 0;
}
.nav-link {
  color: var(--text2);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.nav-link:hover { color: var(--text); background: var(--bg3); }
.nav-user {
  color: var(--text3);
  font-size: 0.85rem;
  padding: 0 0.5rem;
}
.nav-logout {
  color: var(--text2);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  transition: all var(--transition);
}
.nav-logout:hover { color: var(--red-bright); background: rgba(204,0,0,0.1); }
.nav-dropdown { position: relative; }
.nav-dropdown-toggle {
  cursor: pointer;
  color: var(--text2);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  user-select: none;
  transition: all var(--transition);
}
.nav-dropdown-toggle:hover { color: var(--text); background: var(--bg3); }
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  min-width: 180px;
  box-shadow: var(--shadow);
  overflow: hidden;
  z-index: 200;
}
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--text2);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.nav-dropdown-menu a:hover { background: var(--bg4); color: var(--text); }

/* ─── Main Content ──────────────────────────────────────────────────────── */
.main-content { min-height: calc(100vh - var(--nav-h)); }
.main-content.no-nav { min-height: 100vh; }
.page-container { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }
.page-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 1.5rem; }
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-header .page-title { margin-bottom: 0; }

/* ─── Flash Messages ────────────────────────────────────────────────────── */
.flash-container { padding: 0 1.5rem; max-width: 1100px; margin: 1rem auto 0; }
.flash {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}
.flash-success { background: rgba(76,175,80,0.15); border: 1px solid rgba(76,175,80,0.3); color: #a5d6a7; }
.flash-error { background: rgba(204,0,0,0.15); border: 1px solid rgba(204,0,0,0.3); color: #ef9a9a; }
.flash-close { background: none; border: none; color: inherit; cursor: pointer; font-size: 1.2rem; padding: 0 0.25rem; opacity: 0.7; }
.flash-close:hover { opacity: 1; }

/* ─── Buttons ───────────────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  background: var(--red);
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  font-size: 0.9rem;
}
.btn-primary:hover { background: var(--red-bright); color: #fff; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  background: var(--bg4);
  color: var(--text2);
  font-weight: 500;
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  font-size: 0.9rem;
}
.btn-secondary:hover { background: var(--bg3); color: var(--text); }
.btn-danger {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.25rem;
  background: rgba(204,0,0,0.15);
  color: #ef9a9a;
  font-weight: 500;
  border: 1px solid rgba(204,0,0,0.3);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.9rem;
}
.btn-danger:hover { background: rgba(204,0,0,0.3); color: #fff; }
.btn-full { width: 100%; justify-content: center; }
.btn-lg { padding: 0.75rem 2rem; font-size: 1rem; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }
.btn-edit {
  display: inline-flex;
  padding: 0.35rem 0.75rem;
  background: rgba(66,165,245,0.12);
  color: #90caf9;
  border: 1px solid rgba(66,165,245,0.3);
  border-radius: var(--radius);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-edit:hover { background: rgba(66,165,245,0.25); color: #fff; }
.btn-view {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 1rem;
  background: var(--bg4);
  color: var(--red-bright);
  border: 1px solid var(--border2);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
}
.btn-view:hover { background: var(--red); color: #fff; border-color: var(--red); }
.btn-icon { padding: 0.3rem 0.6rem !important; border-radius: var(--radius); }

/* ─── Forms ─────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.875rem; color: var(--text2); margin-bottom: 0.4rem; font-weight: 500; }
.form-group small { color: var(--text3); font-size: 0.8rem; }
.form-input {
  width: 100%;
  padding: 0.6rem 0.9rem;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  transition: border-color var(--transition);
  outline: none;
}
.form-input:focus { border-color: var(--red); }
.form-input::placeholder { color: var(--text3); }
.form-textarea {
  width: 100%;
  padding: 0.6rem 0.9rem;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: border-color var(--transition);
  line-height: 1.5;
}
.form-textarea:focus { border-color: var(--red); }
.form-check-group { display: flex; align-items: center; }
.check-label { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; color: var(--text2); }
.check-label input { width: 16px; height: 16px; accent-color: var(--red); cursor: pointer; }
.required { color: var(--red); }
.input-sm { max-width: 200px; }
.grid-form { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-end; }
.grid-form .form-group { flex: 1; min-width: 160px; margin-bottom: 0; }

/* ─── Cards ─────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 1rem; }
.card-subtitle { color: var(--text2); font-size: 0.875rem; margin-bottom: 1rem; margin-top: -0.5rem; }
.hidden { display: none !important; }

/* ─── Tables ────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
.data-table, .stats-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .stats-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--text3);
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}
.data-table td, .stats-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tr:last-child td, .stats-table tbody tr:last-child td { border-bottom: none; }
.data-table tr:hover td, .stats-table tbody tr:hover td { background: var(--bg4); }
.actions-cell { display: flex; gap: 0.5rem; align-items: center; }
.row-ni { opacity: 0.45; }

/* ─── Badges ────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-admin { background: rgba(204,0,0,0.2); color: #ef9a9a; border: 1px solid rgba(204,0,0,0.3); }
.badge-user { background: rgba(66,165,245,0.12); color: #90caf9; border: 1px solid rgba(66,165,245,0.3); }

/* ─── Catalogue ─────────────────────────────────────────────────────────── */
.search-results-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.search-results-header .page-title { margin-bottom: 0; }
.search-term { color: var(--red-bright); }
.topics-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.25rem; }
.topic-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color var(--transition), transform var(--transition);
}
.topic-card:hover { border-color: var(--border2); transform: translateY(-2px); }
.topic-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.5rem; }
.topic-card-title { font-size: 1.1rem; font-weight: 600; }
.topic-card-title a { color: var(--text); }
.topic-card-title a:hover { color: var(--red-bright); }
.topic-card-desc { color: var(--text2); font-size: 0.875rem; flex: 1; line-height: 1.6; }
.topic-card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }

/* ─── Level Chips ───────────────────────────────────────────────────────── */
.level-chips { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.level-chip {
  display: inline-flex;
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.level-beginner { background: rgba(76,175,80,0.12); color: #a5d6a7; border: 1px solid rgba(76,175,80,0.25); }
.level-intermediate { background: rgba(249,168,37,0.12); color: #ffe082; border: 1px solid rgba(249,168,37,0.25); }
.level-expert { background: rgba(204,0,0,0.12); color: #ef9a9a; border: 1px solid rgba(204,0,0,0.25); }

/* ─── Flag Badges ───────────────────────────────────────────────────────── */
.flag-badges-mini { display: flex; flex-direction: column; gap: 0.25rem; align-items: flex-end; flex-shrink: 0; }
.flag-badge-mini {
  display: inline-flex;
  padding: 0.15rem 0.5rem;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
}
.flag-not-interested { background: rgba(100,100,100,0.15); color: #888; border: 1px solid #333; }
.flag-interested { background: rgba(66,165,245,0.12); color: #90caf9; border: 1px solid rgba(66,165,245,0.25); }
.flag-watched { background: rgba(171,71,188,0.12); color: #ce93d8; border: 1px solid rgba(171,71,188,0.25); }
.flag-learned { background: rgba(249,168,37,0.12); color: #ffe082; border: 1px solid rgba(249,168,37,0.25); }
.flag-mastered { background: rgba(204,0,0,0.18); color: #ef9a9a; border: 1px solid rgba(204,0,0,0.3); }
mark {
  background: rgba(204,0,0,0.28);
  color: #ff8a80;
  border-radius: 3px;
  padding: 0 2px;
}

/* ─── Topic Detail ──────────────────────────────────────────────────────── */
.topic-detail-header {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  align-items: flex-start;
  flex-wrap: wrap;
}
.topic-detail-info { flex: 1; min-width: 250px; }
.back-link { color: var(--text3); font-size: 0.85rem; display: inline-block; margin-bottom: 0.75rem; transition: color var(--transition); }
.back-link:hover { color: var(--text2); }
.topic-detail-title { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; }
.topic-detail-desc { color: var(--text2); line-height: 1.7; }

/* ─── Flag Panel ────────────────────────────────────────────────────────── */
.flag-panel {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  min-width: 220px;
  max-width: 260px;
  flex-shrink: 0;
}
.flag-panel-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.flag-btns { display: flex; flex-direction: column; gap: 0.4rem; }
.flag-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text2);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all var(--transition);
  text-align: left;
}
.flag-btn:hover { color: var(--text); background: var(--bg2); border-color: var(--border2); }
.flag-btn.active { border-color: var(--red); color: var(--text); background: rgba(204,0,0,0.1); }
.flag-btn-score { font-size: 0.72rem; color: var(--text3); }
.flag-btn.active .flag-btn-score { color: var(--red-bright); }

/* ─── Level Tabs ────────────────────────────────────────────────────────── */
.level-tabs-container { margin-top: 0.5rem; }
.tab-nav {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.75rem;
}
.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: -1px;
  transition: all var(--transition);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--red); }
.tab-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.tab-dot.level-dot-beginner { background: #a5d6a7; }
.tab-dot.level-dot-intermediate { background: #ffe082; }
.tab-dot.level-dot-expert { background: #ef9a9a; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.level-desc-progress-row {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  margin-bottom: 1.75rem;
}
.level-intro {
  color: var(--text2);
  line-height: 1.7;
  padding: 1rem 1.25rem;
  background: var(--bg3);
  border-left: 3px solid var(--red-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.level-intro-col {
  flex: 1;
  margin-bottom: 0;
}
.section-heading {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
}

/* ─── Key Points (viewer) ───────────────────────────────────────────────── */
.keypoints-section { margin-bottom: 2rem; }
.keypoints-list { display: flex; flex-direction: column; gap: 1.25rem; }
.keypoint-view {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.kp-view-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--bg4);
  border-bottom: 1px solid var(--border);
}
.kp-view-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  min-width: 26px;
  background: var(--red-dim);
  color: var(--text);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}
.kp-view-text { margin: 0; line-height: 1.5; color: var(--text); padding-top: 2px; }
.kp-resources-view { padding: 1rem; display: flex; flex-direction: column; gap: 1.25rem; }

/* ─── Resource type/starttime badges ───────────────────────────────────── */
.resource-type-badge {
  display: inline-flex;
  padding: 0.15rem 0.5rem;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
}
.rtype-article { background: rgba(66,165,245,0.12); color: #90caf9; border: 1px solid rgba(66,165,245,0.25); }
.rtype-image { background: rgba(171,71,188,0.12); color: #ce93d8; border: 1px solid rgba(171,71,188,0.25); }
.rtype-other { background: rgba(100,100,100,0.15); color: #aaa; border: 1px solid #333; }
.rtype-video { background: rgba(255,152,0,0.12); color: #ffcc80; border: 1px solid rgba(255,152,0,0.25); }
.rtype-local_video { background: rgba(76,175,80,0.12); color: #a5d6a7; border: 1px solid rgba(76,175,80,0.25); }

/* ─── Assigned resource chips (topic edit) ──────────────────────────────── */
.kp-assigned-resources { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.5rem 0; min-height: 1rem; }
.assigned-res-chip { display: inline-flex; align-items: center; gap: 0.4rem; background: var(--bg3); border: 1px solid var(--border2); border-radius: 6px; padding: 0.25rem 0.5rem; font-size: 0.82rem; }
.assigned-res-name { font-weight: 500; }
.btn-icon-sm { background: none; border: none; color: var(--text3); cursor: pointer; font-size: 1rem; line-height: 1; padding: 0 0.1rem; }
.btn-icon-sm:hover { color: var(--red); }
.kp-res-actions { display: flex; gap: 0.5rem; align-items: center; margin-top: 0.25rem; }

/* ─── Courses public page ───────────────────────────────────────────────── */
.courses-grid { display: grid; gap: 1.5rem; }
.course-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.course-card-locked { opacity: 0.55; filter: grayscale(0.4); }
.course-card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 0.75rem; }
.course-card-title { font-size: 1.25rem; font-weight: 700; margin: 0; }
.course-lock-badge { font-size: 0.8rem; color: var(--text3); background: var(--bg3); border: 1px solid var(--border); border-radius: 50px; padding: 0.2rem 0.6rem; white-space: nowrap; flex-shrink: 0; }
.course-card-desc { color: var(--text2); font-size: 0.9rem; margin-bottom: 1rem; }
.course-topics-list { display: flex; flex-direction: column; gap: 0.6rem; }
.course-topic-row { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.course-topic-name { font-size: 0.88rem; color: var(--text2); min-width: 120px; flex-shrink: 0; }
.level-pill { display: inline-flex; align-items: center; padding: 0.3rem 0.85rem; border-radius: 50px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; border: 2px solid transparent; text-decoration: none; transition: filter 0.15s; cursor: pointer; }
.level-pill:hover { filter: brightness(1.15); }
.level-pill-locked { cursor: default; opacity: 0.7; }
.level-pill-locked:hover { filter: none; }
.level-pill-beginner { background: rgba(46,125,50,0.25); color: #81c784; border-color: rgba(46,125,50,0.5); }
.level-pill-intermediate { background: rgba(130,119,23,0.3); color: #e6d44a; border-color: rgba(180,160,30,0.5); }
.level-pill-expert { background: rgba(136,14,79,0.25); color: #f48fb1; border-color: rgba(136,14,79,0.5); }
.user-score-badge { font-size: 0.9rem; color: var(--text2); background: var(--bg3); border: 1px solid var(--border); border-radius: 50px; padding: 0.3rem 0.8rem; }

/* ─── Drop zone (resource upload) ──────────────────────────────────────── */
.course-topic-group { margin-bottom: 1.25rem; }
.course-topic-group-title { font-weight: 600; color: var(--text2); font-size: 0.9rem; margin-bottom: 0.5rem; }
.level-checkbox-label { display: inline-flex; align-items: center; gap: 0.4rem; margin-right: 0.5rem; cursor: pointer; }
.level-checkbox-label input[type="checkbox"] { display: none; }
.level-checkbox-label input[type="checkbox"]:not(:checked) + .level-checkbox-pill { opacity: 0.35; }
.level-checkbox-label:hover .level-checkbox-pill { opacity: 1; filter: brightness(1.2); }

.drop-zone { border: 2px dashed var(--border2); border-radius: var(--radius); padding: 1.5rem; text-align: center; transition: border-color 0.15s, background 0.15s; }
.drop-zone-active { border-color: var(--red); background: rgba(204,0,0,0.05); }
.drop-zone-inner { display: flex; align-items: center; justify-content: center; gap: 0.75rem; flex-wrap: wrap; color: var(--text3); }
.drop-zone-text { font-size: 0.9rem; }

/* ─── Resource library admin ────────────────────────────────────────────── */
.admin-topic-meta { font-size: 0.8rem; color: var(--text3); margin: 0.25rem 0 0; }
.link-muted { color: var(--text3); font-size: 0.82rem; }
.link-muted:hover { color: var(--text2); }
.local-video-status-bar { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.starttime-row-inline { display: flex; align-items: center; gap: 0.4rem; }
.form-hint { font-size: 0.8rem; color: var(--text3); font-weight: 400; }
.resource-starttime {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--text3);
  margin-bottom: 0.35rem;
  margin-left: 0.5rem;
}

/* ─── Resources ─────────────────────────────────────────────────────────── */
.resources-section { margin-bottom: 2rem; }
.resource-item { margin-bottom: 1.5rem; }
.resource-item-title { font-weight: 600; margin-bottom: 0.5rem; color: var(--text2); font-size: 0.9rem; }
.video-wrapper {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.resource-image-wrapper { border-radius: var(--radius); overflow: hidden; display: inline-block; max-width: 100%; }
.resource-image { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }
.pdf-wrapper { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); margin-bottom: 0.5rem; }
.link-resource { padding: 0.5rem 0; }
.resource-link, .btn-resource {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--red-bright);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.resource-link:hover, .btn-resource:hover { background: var(--bg4); border-color: var(--red); color: var(--red-bright); }

/* ─── My Stats ──────────────────────────────────────────────────────────── */
.stats-summary-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}
.stats-score-display { display: flex; align-items: baseline; justify-content: center; gap: 0.5rem; margin-bottom: 1.25rem; }
.stats-score-value { font-size: 3.5rem; font-weight: 900; color: var(--red-bright); line-height: 1; }
.stats-score-sep { font-size: 2rem; color: var(--text3); }
.stats-score-max { font-size: 2rem; color: var(--text2); }
.stats-score-label { color: var(--text3); font-size: 1rem; align-self: center; }
.stats-bar-wrap { display: flex; align-items: center; gap: 1rem; max-width: 400px; margin: 0 auto 1rem; }
.stats-bar { flex: 1; height: 10px; background: var(--bg4); border-radius: 50px; overflow: hidden; }
.stats-bar-fill { height: 100%; background: linear-gradient(90deg, var(--red-dim), var(--red-bright)); border-radius: 50px; transition: width 1s ease; }
.bar-bronze { background: linear-gradient(90deg, #7a4a1a, #cd7f32); }
.bar-silver { background: linear-gradient(90deg, #707070, #c0c0c0); }
.bar-gold { background: linear-gradient(90deg, #b8860b, #ffd700); }
.bar-platinum { background: linear-gradient(90deg, #7b6fa0, #d4c8f5); }
.stats-pct { color: var(--text2); font-size: 0.875rem; min-width: 45px; font-weight: 600; }
.stats-table-wrap { background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.stats-table .score-cell, .stats-table .max-cell { font-weight: 600; }
.stats-totals td { background: var(--bg4); border-top: 1px solid var(--border2); }
.excluded-label { color: var(--text3); font-style: italic; font-size: 0.8rem; }
.no-flag { color: var(--text3); }
.flags-cell { display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center; }
.stats-empty-note { color: var(--text3); font-size: 0.875rem; margin-top: 0.5rem; }

/* Medal thresholds */
.medal-thresholds {
  display: flex; gap: 1rem; justify-content: center; margin-top: 0.75rem;
  flex-wrap: wrap;
}
.threshold {
  font-size: 0.8rem; color: var(--text3); padding: 0.2rem 0.6rem;
  border-radius: 50px; border: 1px solid var(--border2);
  transition: all var(--transition);
}
.threshold.reached { color: var(--text); border-color: var(--border2); background: var(--bg4); }

/* ─── Medal Display ─────────────────────────────────────────────────────── */
.medal-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  animation: medalDrop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes medalDrop {
  from { opacity: 0; transform: translateY(-20px) scale(0.6); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.medal-icon {
  font-size: 6rem;
  line-height: 1;
  filter: drop-shadow(0 4px 16px currentColor);
  display: block;
}
.medal-bronze .medal-icon  { filter: drop-shadow(0 4px 16px rgba(205,127,50,0.7)); }
.medal-silver .medal-icon  { filter: drop-shadow(0 4px 16px rgba(192,192,192,0.7)); }
.medal-gold .medal-icon    { filter: drop-shadow(0 4px 16px rgba(255,215,0,0.7)); }
.medal-platinum .medal-icon{ filter: drop-shadow(0 4px 20px rgba(180,150,255,0.8)); }

.medal-label {
  font-size: 1.4rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.medal-bronze  .medal-label { color: #cd7f32; text-shadow: 0 0 20px rgba(205,127,50,0.5); }
.medal-silver  .medal-label { color: #c8c8c8; text-shadow: 0 0 20px rgba(192,192,192,0.5); }
.medal-gold    .medal-label { color: #ffd700; text-shadow: 0 0 20px rgba(255,215,0,0.6); }
.medal-platinum .medal-label{ color: #d4c8f5; text-shadow: 0 0 20px rgba(180,150,255,0.7); }

/* ─── Admin ─────────────────────────────────────────────────────────────── */
.admin-container { max-width: 900px; }
.admin-topics-list { display: flex; flex-direction: column; gap: 0.75rem; }
.admin-topic-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  transition: border-color var(--transition);
}
.admin-topic-card:hover { border-color: var(--border2); }
.admin-topic-info { flex: 1; min-width: 0; }
.admin-topic-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.3rem; }
.admin-topic-desc { color: var(--text2); font-size: 0.875rem; margin-bottom: 0.6rem; }
.admin-topic-meta { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.admin-topic-actions { display: flex; gap: 0.5rem; align-items: center; flex-shrink: 0; }

/* ─── Topic Edit Form ───────────────────────────────────────────────────── */
.level-edit-card { border-left: 3px solid transparent; }
.level-card-beginner { border-left-color: #4caf50; }
.level-card-intermediate { border-left-color: #f9a825; }
.level-card-expert { border-left-color: var(--red); }
.level-card-heading { display: flex; align-items: center; gap: 0.6rem; }
.level-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.level-dot-beginner { background: #a5d6a7; }
.level-dot-intermediate { background: #ffe082; }
.level-dot-expert { background: #ef9a9a; }
.subsection { margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--border); }
.subsection-title { font-size: 0.875rem; font-weight: 600; color: var(--text2); margin-bottom: 0.75rem; }
.subsection-hint { color: var(--text3); font-weight: 400; font-size: 0.8rem; }

/* Key Point edit blocks */
.keypoints-edit-list { display: flex; flex-direction: column; gap: 0.75rem; }
.keypoint-edit-block {
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.kp-edit-row { display: flex; align-items: center; gap: 0.5rem; }
.kp-move-col { display: flex; align-items: center; gap: 0.3rem; flex-shrink: 0; }
.kp-display-num {
  display: flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; min-width: 22px;
  background: var(--red-dim); color: var(--text);
  border-radius: 50%; font-size: 0.75rem; font-weight: 700;
}
.kp-arrows { display: flex; flex-direction: column; gap: 1px; }
.btn-arrow {
  display: flex; align-items: center; justify-content: center;
  width: 20px; height: 18px;
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 3px; color: var(--text2); cursor: pointer;
  font-size: 0.6rem; padding: 0;
  transition: all var(--transition);
}
.btn-arrow:hover:not(:disabled) { background: var(--bg2); color: var(--text); border-color: var(--red-dim); }
.btn-arrow:disabled { opacity: 0.25; cursor: not-allowed; }
.kp-text-input { flex: 1; }
.btn-xs { padding: 0.25rem 0.6rem; font-size: 0.75rem; margin-top: 0.25rem; }

/* Resources within key point edit */
.kp-resources-edit { display: flex; flex-direction: column; gap: 0.5rem; padding-left: 0.5rem; }
.resource-edit-block {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.res-row-main { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.res-row-main .form-input { flex: 1; min-width: 120px; }
.res-title-input { max-width: 160px; flex: 0 1 160px !important; }
.res-type-select { max-width: 110px; flex: 0 0 110px !important; }
.res-starttime-row {
  display: flex; align-items: center; gap: 0.4rem; padding-left: 0.25rem; flex-wrap: wrap;
}
.starttime-label { font-size: 0.78rem; color: var(--text3); white-space: nowrap; }
.starttime-input { max-width: 64px !important; text-align: center; }
.starttime-sep { color: var(--text3); font-weight: 700; }

/* ─── Flag Config Table ─────────────────────────────────────────────────── */
.flags-config-table { display: flex; flex-direction: column; gap: 0.25rem; }
.flags-config-header {
  display: grid;
  grid-template-columns: 1fr 80px 100px;
  gap: 1rem;
  padding: 0 0.25rem 0.5rem;
  color: var(--text3);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}
.flags-config-row {
  display: grid;
  grid-template-columns: 1fr 80px 100px;
  gap: 1rem;
  align-items: center;
  padding: 0.6rem 0.25rem;
  border-bottom: 1px solid var(--border);
}
.flags-config-row:last-child { border-bottom: none; }
.flag-config-name { font-weight: 600; font-size: 0.875rem; }
.score-input { max-width: 90px; }
.form-actions-bar { display: flex; gap: 1rem; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }

/* ─── Toggle Switch ─────────────────────────────────────────────────────── */
.toggle-label { display: inline-flex; align-items: center; cursor: pointer; }
.toggle-label input { display: none; }
.toggle-slider {
  width: 36px; height: 20px;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: 50px;
  position: relative;
  transition: all var(--transition);
}
.toggle-slider::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  background: var(--text3);
  border-radius: 50%;
  transition: all var(--transition);
}
.toggle-label input:checked + .toggle-slider { background: rgba(204,0,0,0.25); border-color: var(--red-dim); }
.toggle-label input:checked + .toggle-slider::after { transform: translateX(16px); background: var(--red-bright); }

/* ─── Modal ─────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex; align-items: center; justify-content: center;
  z-index: 999;
  backdrop-filter: blur(4px);
}
.modal-box {
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 2rem;
  width: 100%; max-width: 460px;
  box-shadow: var(--shadow-lg);
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.modal-header h2 { font-size: 1.2rem; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--text2); font-size: 1.5rem; cursor: pointer; padding: 0 0.25rem; line-height: 1; }
.modal-close:hover { color: var(--text); }
.modal-actions { display: flex; gap: 0.75rem; margin-top: 1.5rem; }

/* ─── Empty State ───────────────────────────────────────────────────────── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text2); }

/* ─── Global medal (3× size) ────────────────────────────────────────────── */
.medal-global .medal-icon  { font-size: 18rem; }
.medal-global .medal-label { font-size: 4.2rem; }

/* ─── Course stats section ──────────────────────────────────────────────── */
.courses-stats-section { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1.5rem; margin-bottom: 2rem; }
.course-stats-card { text-align: center; }
.course-stats-name { font-size: 1.3rem; font-weight: 700; color: var(--text); margin-bottom: 0.25rem; }
.course-stats-desc { color: var(--text3); font-size: 0.85rem; margin-bottom: 1rem; }
.global-stats-card { text-align: center; }
.global-stats-heading { font-size: 1.4rem; font-weight: 700; margin-bottom: 1.25rem; color: var(--text2); letter-spacing: 0.05em; text-transform: uppercase; }

/* ─── Course admin: drag-and-drop topic assignment ──────────────────────── */
.course-topic-assignment { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1rem; }
.pool-heading { font-size: 0.95rem; font-weight: 600; color: var(--text2); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem; }
.pool-count { background: var(--red-dim); color: var(--red-bright); font-size: 0.75rem; padding: 0.1rem 0.5rem; border-radius: 20px; font-weight: 700; }
.topic-pool { list-style: none; padding: 0; margin: 0; min-height: 120px; border: 2px dashed var(--border); border-radius: var(--radius); padding: 0.5rem; background: var(--bg2); }
.topic-pool-assigned { border-color: var(--red-dim); background: color-mix(in srgb, var(--red-dim) 10%, var(--bg2)); }
.topic-pool-item { display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0.75rem; margin-bottom: 0.35rem; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); cursor: grab; user-select: none; transition: background 0.15s, opacity 0.15s; }
.topic-pool-item:last-child { margin-bottom: 0; }
.topic-pool-item:hover { background: var(--bg4); }
.topic-pool-item.dragging { opacity: 0.4; cursor: grabbing; }
.drag-handle { color: var(--text3); font-size: 1.1rem; flex-shrink: 0; }
.pool-item-title { font-size: 0.9rem; color: var(--text); }
.btn-arrow-order { padding: 0.2rem 0.5rem; font-size: 0.75rem; }

/* ─── Course admin: ordering arrows ────────────────────────────────────────*/

/* ─── Local video upload widget ─────────────────────────────────────────── */
.res-url-row { margin-top: 0.4rem; }
.res-localvideo-row { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin-top: 0.4rem; padding: 0.5rem 0.75rem; background: var(--bg2); border-radius: var(--radius); border: 1px solid var(--border); }
.local-video-status { font-size: 0.85rem; color: var(--text2); flex: 1 1 auto; }
.upload-ok { color: #4caf50; }
.upload-error { color: var(--red-bright); }
.upload-prompt { color: var(--text3); }
.upload-pick-btn { position: relative; overflow: hidden; display: inline-block; cursor: pointer; }
.hidden-file-input { position: absolute; inset: 0; opacity: 0; cursor: pointer; font-size: 0; }
.upload-progress { font-size: 0.8rem; color: var(--text3); white-space: nowrap; }
video { max-width: 100%; border-radius: var(--radius); background: #000; }

/* ─── Scrollbar ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .navbar { padding: 0 1rem; gap: 0.5rem; }
  .nav-user { display: none; }
  .nav-search-form { max-width: 180px; }
  .topic-detail-header { flex-direction: column; }
  .flag-panel { max-width: 100%; width: 100%; }
  .topics-grid { grid-template-columns: 1fr; }
  .admin-topic-card { flex-direction: column; }
  .flags-config-header, .flags-config-row { grid-template-columns: 1fr 60px 90px; }
}
 pool ─────────────────────────────── */
.course-topic-assignment { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1rem; }
.topic-pool-col {}
.pool-heading { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text2); margin-bottom: 0.6rem; display: flex; align-items: center; gap: 0.5rem; }
.pool-count { background: var(--bg4); border: 1px solid var(--border2); border-radius: 50px; padding: 0.1rem 0.5rem; font-size: 0.78rem; color: var(--text2); }
.topic-pool { list-style: none; min-height: 120px; border: 1px dashed var(--border2); border-radius: var(--radius); padding: 0.5rem; display: flex; flex-direction: column; gap: 0.35rem; }
.topic-pool-assigned { border-color: var(--red-dim); background: rgba(204,0,0,0.04); }
.topic-pool-item { display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0.6rem; background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius); cursor: grab; user-select: none; font-size: 0.875rem; }
.topic-pool-item:hover { border-color: var(--border2); background: var(--bg4); }
.topic-pool-item.dragging { opacity: 0.4; cursor: grabbing; }
.drag-handle { color: var(--text3); font-size: 1rem; cursor: grab; flex-shrink: 0; }
.pool-item-title { flex: 1; display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

/* ─── Pool level badges (course_edit) ──────────────────────────────────── */
.pool-level-badge { font-size: 0.7rem; font-weight: 700; padding: 0.15rem 0.45rem; border-radius: 50px; text-transform: uppercase; letter-spacing: 0.05em; }
.level-badge-beginner    { background: rgba(76,175,80,0.2);  color: #81c784; border: 1px solid rgba(76,175,80,0.35); }
.level-badge-intermediate{ background: rgba(249,168,37,0.2); color: #ffca28; border: 1px solid rgba(249,168,37,0.35); }
.level-badge-expert      { background: rgba(204,0,0,0.2);    color: #e57373; border: 1px solid rgba(204,0,0,0.35); }

/* ─── NI toggle (topic detail) ──────────────────────────────────────────── */
.ni-panel { flex-shrink: 0; }
.ni-toggle-btn {
  padding: 0.45rem 1.1rem;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 50px;
  color: var(--text2);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}
.ni-toggle-btn:hover { border-color: var(--red-dim); color: var(--text); }
.ni-toggle-btn.is-ni {
  background: rgba(204,0,0,0.15);
  border-color: var(--red-dim);
  color: var(--red-bright);
}
.ni-toggle-btn.is-ni:hover { background: rgba(204,0,0,0.25); }

/* ─── Level flag panel (topic detail, per-level progress) ──────────────── */
.level-flag-panel {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap;
  flex-shrink: 0;
  margin-bottom: 0;
  padding: 0.65rem 0.85rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.level-flag-label { font-size: 0.8rem; color: var(--text2); font-weight: 600; white-space: nowrap; }
.flag-btns-inline { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.flag-btn {
  display: inline-flex; flex-direction: column; align-items: center;
  padding: 0.4rem 0.75rem;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  gap: 0.1rem;
}
.flag-btn:hover:not(:disabled) { border-color: var(--red-dim); background: rgba(204,0,0,0.08); }
.flag-btn.active { background: rgba(204,0,0,0.18); border-color: var(--red-bright); }
.flag-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.flag-btn-name { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.flag-btn-score { font-size: 0.7rem; color: var(--text3); }
.flag-btn.active .flag-btn-name { color: var(--red-bright); }
.flag-btn.active .flag-btn-score { color: var(--red-dim); }
.level-flag-disabled { opacity: 0.45; pointer-events: none; }

/* ─── NI topic card treatment ──────────────────────────────────────────── */
.topic-card-ni { opacity: 0.55; filter: grayscale(0.4); }
.topic-card-ni:hover { opacity: 0.75; filter: grayscale(0.2); }

/* ─── Level chip active state (catalogue) ───────────────────────────────── */
.level-chip-active {
  background: rgba(204,0,0,0.25) !important;
  border-color: var(--red-bright) !important;
  color: #ff8a80 !important;
}

/* ─── Local video upload widget ─────────────────────────────────────────── */
video { max-width: 100%; border-radius: var(--radius); background: #000; display: block; }
.upload-progress-wrap { margin-top: 0.5rem; }
.upload-progress-bar { height: 6px; background: var(--bg4); border-radius: 3px; overflow: hidden; margin-bottom: 0.25rem; }
.upload-progress-fill { height: 100%; background: var(--red-bright); width: 0%; transition: width 0.2s; }
.upload-progress-label { font-size: 0.78rem; color: var(--text2); }

/* ─── Resource description (topic view) ─────────────────────────────────── */
.resource-description { color: var(--text2); font-size: 0.9rem; margin: 0.25rem 0 0.5rem; line-height: 1.5; }

/* ─── Resource edit: description textarea ───────────────────────────────── */
.res-desc-input { margin-top: 0.4rem; font-size: 0.875rem; resize: vertical; }

/* ─── Resource edit: move-to-level select ───────────────────────────────── */
.res-level-select { max-width: 150px; font-size: 0.8rem; color: var(--text3); background: var(--bg2); cursor: pointer; }
.res-level-select:focus { color: var(--text); }

/* ─── Resource edit: per-resource save button ───────────────────────────── */
.res-save-btn { margin-top: 0.5rem; }

/* ─── Tags ───────────────────────────────────────────────────────────────── */
.tag-chips-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.5rem; }
.tag-chips-row-sm { margin-top: 0.35rem; }
.tag-chip { display: inline-flex; align-items: center; gap: 0.2rem; padding: 0.2rem 0.6rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; background: var(--bg3); border: 1px solid var(--border2); color: var(--text2); white-space: nowrap; }
.tag-chip-sm { font-size: 0.72rem; padding: 0.15rem 0.5rem; }
.tag-chip-large { font-size: 1.2rem; padding: 0.3rem 0.9rem; }
.tag-chip-link { text-decoration: none; cursor: pointer; transition: background 0.15s, color 0.15s; }
.tag-chip-link:hover { background: var(--red-dim); color: var(--text); border-color: var(--red-bright); }
.tag-chip-edit { background: var(--red-dim); color: var(--text); border-color: var(--red-dim); }
.tag-chip-remove { background: none; border: none; cursor: pointer; color: var(--text3); font-size: 0.9rem; padding: 0; line-height: 1; margin-left: 0.1rem; }
.tag-chip-remove:hover { color: var(--red-bright); }

/* ─── Tag input widget ───────────────────────────────────────────────────── */
.tag-input-wrapper { position: relative; }
.tag-chips-display { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 0.4rem; min-height: 0; }
.tag-text-input { max-width: 360px; }
.tag-autocomplete { position: absolute; z-index: 100; background: var(--bg3); border: 1px solid var(--border2); border-radius: var(--radius); min-width: 200px; max-height: 220px; overflow-y: auto; box-shadow: 0 4px 12px rgba(0,0,0,0.4); }
.tag-autocomplete.hidden { display: none; }
.tag-autocomplete-item { padding: 0.5rem 0.75rem; cursor: pointer; font-size: 0.875rem; color: var(--text2); }
.tag-autocomplete-item:hover { background: var(--bg4); color: var(--text); }

/* ─── Key point tags row ─────────────────────────────────────────────────── */
.kp-tags-row { display: flex; align-items: flex-start; gap: 0.5rem; flex-wrap: wrap; margin: 0.4rem 0 0.5rem; padding: 0.4rem 0.6rem; background: var(--bg2); border-radius: var(--radius); border: 1px solid var(--border); }

/* ─── Tag page ───────────────────────────────────────────────────────────── */
.tag-page-title { display: flex; align-items: center; gap: 0.75rem; margin-top: 0.25rem; }
.tag-results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 768px) { .tag-results-grid { grid-template-columns: 1fr; } }
.tag-result-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.tag-result-link { display: flex; flex-direction: column; gap: 0.2rem; padding: 0.6rem 0.75rem; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); text-decoration: none; transition: border-color 0.15s, background 0.15s; }
.tag-result-link:hover { border-color: var(--border2); background: var(--bg3); }
.tag-result-context { font-size: 0.75rem; color: var(--text3); }
.tag-result-title { font-size: 0.9rem; color: var(--text); font-weight: 500; }
.tag-result-desc { font-size: 0.8rem; color: var(--text2); }

/* ─── Admin tags page ────────────────────────────────────────────────────── */
.tags-admin-list { display: flex; flex-direction: column; gap: 0.5rem; }
.tag-admin-row { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.tag-admin-row:last-child { border-bottom: none; }
.tag-admin-counts { font-size: 0.8rem; color: var(--text3); min-width: 140px; }
.tag-edit-form { display: flex; align-items: center; gap: 0.4rem; }
.form-input-sm { max-width: 160px; }
.inline-form { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.badge { background: var(--bg3); border: 1px solid var(--border2); border-radius: 50px; padding: 0.1rem 0.5rem; font-size: 0.78rem; color: var(--text2); font-weight: 600; margin-left: 0.3rem; }
.text-muted { color: var(--text3); font-size: 0.9rem; }

/* ─── Key-point scoring rework ──────────────────────────────────────────── */

/* Topic header score badge */
.topic-score-badge {
  display: flex; flex-direction: column; align-items: flex-end;
  padding: 0.4rem 0.75rem; margin-bottom: 0.6rem;
  background: var(--bg3); border: 1px solid var(--border2); border-radius: var(--radius);
}
.topic-score-num { font-size: 1.05rem; font-weight: 700; color: var(--red-bright); }
.topic-score-lbl { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text3); }
.topic-score-excluded { opacity: 0.5; }
.topic-score-excluded .topic-score-num { color: var(--text3); }

/* Per-level progress bar */
.level-progress-panel {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; flex-shrink: 0;
  padding: 0.65rem 0.85rem;
  background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
}
.level-progress-label { font-size: 0.8rem; color: var(--text2); font-weight: 600; white-space: nowrap; }
.level-progress-bar {
  flex: 1; min-width: 120px; height: 8px;
  background: var(--bg); border: 1px solid var(--border2); border-radius: 50px; overflow: hidden;
}
.level-progress-fill {
  height: 100%; background: linear-gradient(90deg, var(--red-dim), var(--red-bright));
  transition: width var(--transition);
}
.level-progress-num { font-size: 0.82rem; color: var(--text2); font-weight: 600; white-space: nowrap; }
.level-progress-score { color: var(--red-bright); }

/* Key-point completion control (segmented) */
.kp-complete {
  display: flex; gap: 0.4rem; flex-wrap: wrap;
  padding: 0.6rem 1rem; background: var(--bg4); border-bottom: 1px solid var(--border);
}
.kp-complete-disabled { opacity: 0.45; pointer-events: none; }
.kp-state-btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  background: var(--bg3); border: 1px solid var(--border2); border-radius: 50px;
  color: var(--text2); cursor: pointer; font-size: 0.8rem; font-weight: 600;
  transition: all var(--transition);
}
.kp-state-btn:hover:not(:disabled) { color: var(--text); border-color: var(--red-dim); }
.kp-state-btn:disabled { cursor: not-allowed; }
.kp-pts { font-size: 0.68rem; color: var(--text3); }
.kp-state-btn[data-state="checked"].active {
  background: rgba(76,175,80,0.15); border-color: var(--green); color: var(--green);
}
.kp-state-btn[data-state="checked"].active .kp-pts { color: var(--green); }
.kp-state-btn[data-state="mastered"].active {
  background: rgba(249,168,37,0.15); border-color: var(--yellow); color: var(--yellow);
}
.kp-state-btn[data-state="mastered"].active .kp-pts { color: var(--yellow); }
.kp-state-btn[data-state="not_checked"].active {
  background: var(--bg2); border-color: var(--border2); color: var(--text);
}
/* Subtle left accent on the keypoint card reflecting its state */
.keypoint-view.kp-state-checked { border-left: 3px solid var(--green); }
.keypoint-view.kp-state-mastered { border-left: 3px solid var(--yellow); }

/* Rich-text rendering (shared by topic view + admin editor) */
.rich-text p { margin: 0 0 0.5rem; }
.rich-text p:last-child { margin-bottom: 0; }
.rich-text ul, .rich-text ol { margin: 0.25rem 0 0.5rem 1.4rem; }
.rich-text a { color: var(--red-bright); text-decoration: underline; }
.kp-view-text.rich-text { margin: 0; line-height: 1.5; color: var(--text); padding-top: 2px; flex: 1; }

/* Rich-text editor (admin) */
.kp-richtext { flex: 1; display: flex; flex-direction: column; border: 1px solid var(--border2); border-radius: var(--radius); overflow: hidden; background: var(--bg3); }
.kp-rt-toolbar { display: flex; gap: 2px; padding: 0.3rem; background: var(--bg2); border-bottom: 1px solid var(--border2); flex-wrap: wrap; }
.kp-rt-btn {
  min-width: 28px; height: 26px; padding: 0 0.4rem;
  background: var(--bg4); border: 1px solid var(--border2); border-radius: 4px;
  color: var(--text2); cursor: pointer; font-size: 0.8rem; line-height: 1;
}
.kp-rt-btn:hover { color: var(--text); border-color: var(--red-dim); background: var(--bg3); }
.kp-rt-editor {
  min-height: 2.5rem; padding: 0.5rem 0.7rem; color: var(--text);
  outline: none; line-height: 1.5;
}
.kp-rt-editor:focus { box-shadow: inset 0 0 0 1px var(--red-dim); }
.kp-rt-editor:empty:before { content: attr(data-placeholder); color: var(--text3); }