/* ═══════════════════════════════════════════════════════════════════════
   Course Detail Page CSS
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.course-hero {
  position: relative; padding-top: calc(var(--nav-h) + 40px);
  padding-bottom: 60px; overflow: hidden;
}
.course-hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(135deg, var(--course-color, #6366f1)12 0%, transparent 60%);
  opacity: 0.08;
}

.breadcrumb {
  font-size: 0.8rem; color: var(--text-muted); margin-bottom: 32px; position: relative; z-index: 1;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--text-primary); }
.breadcrumb span { color: var(--text-primary); }

.course-hero-inner {
  display: grid; grid-template-columns: 1fr 380px; gap: 48px;
  align-items: start; position: relative; z-index: 1;
}
.course-hero-icon { font-size: 4rem; margin-bottom: 16px; }
.course-hero-title { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; margin-bottom: 16px; }
.course-hero-desc { color: var(--text-secondary); font-size: 1rem; line-height: 1.7; max-width: 560px; margin-bottom: 24px; }

.course-hero-meta { display: flex; flex-wrap: wrap; gap: 10px; }
.course-meta-pill {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border);
  font-size: 0.8rem; font-weight: 600; color: var(--text-secondary);
}
.course-meta-pill.badge-free { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.3); color: var(--success); }

/* ─── Subscribe Box ──────────────────────────────────────────────────────── */
.subscribe-box { padding: 28px; position: sticky; top: calc(var(--nav-h) + 20px); }
.subscribe-price { margin-bottom: 20px; }
.price-from { display: block; font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }
.price-amount { font-family: var(--font-display); font-size: 2.4rem; font-weight: 800; color: var(--text-primary); }
.price-period { font-size: 1rem; color: var(--text-secondary); }
.subscribe-perks { list-style: none; margin-bottom: 24px; display: flex; flex-direction: column; gap: 10px; }
.subscribe-perks li { font-size: 0.875rem; color: var(--text-secondary); }
.subscribe-note { text-align: center; font-size: 0.75rem; color: var(--text-muted); margin-top: 10px; }

.subscribed-badge {
  display: flex; gap: 14px; align-items: center;
  background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-md); padding: 16px;
  font-size: 1.5rem;
}

/* ─── Tabs ───────────────────────────────────────────────────────────────── */
.course-tabs-wrap {
  border-bottom: 1px solid var(--border);
  background: rgba(5,7,15,0.9);
  position: sticky; top: var(--nav-h); z-index: 50;
  backdrop-filter: blur(20px);
}
.course-tabs { display: flex; gap: 4px; padding: 12px 0 0; }
.course-tab {
  padding: 10px 20px; font-size: 0.875rem; font-weight: 600;
  color: var(--text-secondary); background: none; border: none;
  border-bottom: 2px solid transparent;
  transition: all 0.2s; cursor: pointer; margin-bottom: -1px;
}
.course-tab:hover { color: var(--text-primary); }
.course-tab.active { color: var(--accent-light); border-bottom-color: var(--accent); }

.course-main { padding: 48px 0 100px; }

/* ─── Tab Panels ─────────────────────────────────────────────────────────── */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.videos-header { margin-bottom: 28px; }
.videos-header h2 { font-family: var(--font-display); font-size: 1.6rem; margin-bottom: 8px; }

.access-note {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: var(--radius-md);
  background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3);
  color: var(--gold-light); font-size: 0.85rem; margin-top: 12px;
}

/* ─── Videos Grid ────────────────────────────────────────────────────────── */
.videos-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; position: relative;
  cursor: pointer; transition: all 0.3s;
}
.video-card:hover:not(.locked) { transform: translateY(-4px); border-color: var(--border-glow); box-shadow: var(--shadow-glow); }
.video-card.locked { cursor: default; }

.video-thumb {
  position: relative; aspect-ratio: 16/9;
  background: linear-gradient(135deg, #1a1f2e, #0d1117);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; }
.video-play-btn {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.3); transition: background 0.2s;
}
.video-card:hover:not(.locked) .video-play-btn { background: rgba(0,0,0,0.15); }
.play-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255,255,255,0.15); backdrop-filter: blur(8px);
  border: 2px solid rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; transition: transform 0.2s;
}
.video-card:hover:not(.locked) .play-icon { transform: scale(1.1); }
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.7); border-radius: 4px; padding: 2px 6px;
  font-size: 0.72rem; font-weight: 600; color: #fff;
}
.video-thumb-placeholder { font-size: 3rem; }

.video-info { padding: 14px 16px; }
.video-order { font-size: 0.72rem; font-weight: 700; color: var(--text-muted); letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 4px; }
.video-title { font-size: 0.9rem; font-weight: 600; line-height: 1.4; margin-bottom: 6px; }
.video-desc  { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; }
.video-tags  { display: flex; gap: 6px; margin-top: 10px; }

/* Lock overlay */
.video-lock { position: absolute; inset: 0; background: rgba(5,7,15,0.8); backdrop-filter: blur(4px); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; }
.video-lock-icon { font-size: 1.8rem; }
.video-lock-text { font-size: 0.75rem; color: var(--text-secondary); text-align: center; padding: 0 12px; }

/* ─── Tests List ─────────────────────────────────────────────────────────── */
.tests-list { display: flex; flex-direction: column; gap: 14px; }
.test-card {
  background: var(--bg-card2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  transition: all 0.25s; cursor: pointer;
}
.test-card:hover:not(.locked) { border-color: var(--border-glow); background: rgba(99,102,241,0.04); }
.test-card.locked { cursor: default; opacity: 0.65; }
.test-info { flex: 1; }
.test-type-badge {
  display: inline-block; padding: 3px 10px; border-radius: 100px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 8px;
}
.type-mock       { background: rgba(99,102,241,0.15); color: var(--accent-light); }
.type-assessment { background: rgba(245,158,11,0.15); color: var(--gold); }
.type-live       { background: rgba(239,68,68,0.15);  color: #f87171; }
.test-title { font-weight: 700; font-size: 1rem; margin-bottom: 6px; }
.test-meta  { font-size: 0.8rem; color: var(--text-secondary); display: flex; gap: 16px; flex-wrap: wrap; }
.test-action { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }

/* ─── Overview ───────────────────────────────────────────────────────────── */
.overview-content { max-width: 800px; }
.overview-section { margin-bottom: 40px; }
.overview-section h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.overview-section ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.overview-section ul li { display: flex; gap: 12px; color: var(--text-secondary); font-size: 0.9rem; line-height: 1.5; }
.overview-section ul li::before { content: '→'; color: var(--accent-light); flex-shrink: 0; }

/* ─── Video Modal ────────────────────────────────────────────────────────── */
.video-modal-inner {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xl); overflow: hidden;
  width: 90vw; max-width: 900px; position: relative;
  animation: slideUp 0.3s ease;
}
.video-title-bar {
  padding: 16px 24px; border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.video-title-bar h3 { font-size: 1rem; font-weight: 600; }
.video-container { background: #000; }
.video-container video { width: 100%; display: block; max-height: 70vh; }
.video-container iframe { width: 100%; aspect-ratio: 16/9; border: none; display: block; }

@media (max-width: 900px) {
  .course-hero-inner { grid-template-columns: 1fr; }
  .subscribe-box { position: static; }
}
@media (max-width: 600px) {
  .videos-grid { grid-template-columns: 1fr; }
  .test-card { flex-direction: column; align-items: flex-start; }
}