/* ============================================
   Course Single Page - Pure CSS (Flatsome friendly)
   ============================================ */

* { box-sizing: border-box; }

.course-single {
  --primary: #2b6ef6;
  --primary-dark: #1e57d6;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --soft: #f1f5fb;
  --card: #ffffff;
  --bg: #ffffff;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-md: 0 6px 18px rgba(15, 23, 42, .06);

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  padding: 24px 0 60px;
}

.course-single .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.course-single img { max-width: 100%; display: block; }
.course-single h1, .course-single h2, .course-single h3 { margin: 0; }
.course-single ul { list-style: none; padding: 0; margin: 0; }
.course-single a { color: inherit; text-decoration: none; }
.course-single p { margin: 0 0 14px; color: #374151; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .bc-sep { color: #9ca3af; flex: none; }
.breadcrumb span { color: var(--text); }

/* ---------- HERO GRID ---------- */
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 0.95fr;
  gap: 22px;
  align-items: start;
  margin-bottom: 24px;
}

/* Thumb */
.hero-thumb {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 11;
  background: #111827;
  box-shadow: var(--shadow-md);
}
.hero-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.play-btn {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 70px; height: 70px;
  border-radius: 50%;
  border: 0;
  background: rgba(255,255,255,.92);
  color: var(--primary);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform .2s ease, background .2s ease;
}
.play-btn:hover { transform: scale(1.07); background: #fff; }
.play-btn svg { margin-left: 4px; }

/* Info */
.hero-info {
  padding-top: 4px;
}
.course-title {
  font-size: 26px;
  font-weight: 700;
  color: #111827;
  line-height: 1.3;
  margin-bottom: 14px;
}

.course-stats {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 18px;
}
.stars {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.stars svg { width: 16px; height: 16px; }
.stars .rate-num {
  margin-left: 6px;
  color: var(--text);
  font-weight: 500;
}
.course-stats .divider { color: #d1d5db; }
.course-stats .students {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-list {
  display: grid;
  gap: 12px;
  font-size: 15px;
}
.meta-list li {
  display: grid;
  grid-template-columns: 160px 1fr;
  align-items: center;
  gap: 14px;
}
.meta-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}
.meta-value {
  color: var(--text);
  font-weight: 500;
}

/* Price card */
.price-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 20px;
}
.price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.price-old {
  color: var(--muted);
  text-decoration: line-through;
  font-size: 15px;
}
.price-badge {
  background: #ef4444;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}
.price-new {
  color: var(--primary);
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 18px;
}

.btn {
  width: 100%;
  padding: 13px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background .15s, color .15s, border-color .15s, transform .1s;
}
.btn + .btn { margin-top: 10px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
  background: #fff;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover { background: #eff4fe; }

.perks {
  margin-top: 18px;
  display: grid;
  gap: 12px;
  font-size: 14px;
  color: #374151;
}
.perks li {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- Panels ---------- */
.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.panel-soft {
  background: var(--soft);
  border-color: transparent;
}
.panel-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
}

/* Two column section */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 22px;
}

.check-list, .who-list {
  display: grid;
  gap: 12px;
  font-size: 15px;
  color: #374151;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.check-list svg { flex: none; margin-top: 2px; }

.who-list li {
  display: flex;
  align-items: center;
  gap: 14px;
}
.who-icon {
  width: 38px; height: 38px;
  border-radius: 8px;
  background: #e3edff;
  display: grid;
  place-items: center;
  flex: none;
}

/* ---------- Related ---------- */
.related { margin-top: 26px; }
.related-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 18px;
}
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}
.see-all {
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.see-all:hover { text-decoration: underline; }

.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.course-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease;
}
.course-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.card-thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0f172a;
}
.card-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.card-body { padding: 14px 16px 18px; }
.card-title {
  font-size: 15px;
  font-weight: 600;
  color: #111827;
  line-height: 1.4;
  min-height: 42px;
  margin-bottom: 10px;
}
.card-meta {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}
.card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.card-rate {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
}
.stars-sm svg { width: 14px; height: 14px; }

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "thumb info"
      "price price";
  }
  .hero-thumb { grid-area: thumb; }
  .hero-info  { grid-area: info; }
  .price-card { grid-area: price; position: static; }

  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Small tablet (≤860px) */
@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "thumb"
      "info"
      "price";
  }
  .course-title { font-size: 22px; }

  .two-col { grid-template-columns: 1fr; }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .panel { padding: 22px 20px; }
}

/* Mobile (≤560px) */
@media (max-width: 560px) {
  .course-single { padding: 16px 0 40px; }
  .course-single .container { padding: 0 14px; }

  .course-title { font-size: 20px; }

  .meta-list li {
    grid-template-columns: 130px 1fr;
    gap: 10px;
    font-size: 14px;
  }
  .meta-label { gap: 8px; }

  .price-new { font-size: 26px; }
  .price-card { padding: 18px; }

  .panel { padding: 18px 16px; }
  .panel-title { font-size: 17px; }

  .section-title { font-size: 19px; }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .breadcrumb { font-size: 13px; }
  .play-btn { width: 56px; height: 56px; }
  .play-btn svg { width: 22px; height: 22px; }
}

/* Extra small (≤380px) */
@media (max-width: 380px) {
  .meta-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .course-stats { gap: 6px; }
  .course-stats .divider { display: none; }
}