/* ── Single Course Page ──────────────────────────────────── */

/* Hero */
.sb-single-hero {
  position: relative;
  min-height: 420px;

  color: #fff;
  display: flex;
  align-items: stretch;
  overflow: hidden;
}
.sb-single-hero--amber {
  background-color: #92400e;
}
.sb-single-hero--green {
  background-color: #065f46;
}

/* Real <img> (not CSS background) — !important beats parent theme img { height:auto } */
.sb-single-hero__bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100% !important;
  max-width: none;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  display: block;
}

.sb-single-hero__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}
.sb-single-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
  align-items: start;
  padding-top: 3rem;
  padding-bottom: 3rem;
}
.sb-single-hero__text {
  align-self: center;
}

.sb-single-hero__badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0.25rem 0.75rem;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.sb-single-hero__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}
.sb-single-hero__tagline {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: 1.25rem;
  max-width: 52ch;
}
.sb-single-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
}
.sb-single-hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(255, 255, 255, 0.15);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* Purchase Card */
.sb-purchase-card {
  background: #fff;
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  color: var(--sb-text);
  top: 2rem;
  position: sticky;
}
.sb-purchase-card__price-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.sb-purchase-card__price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--sb-primary);
}
.sb-purchase-card__old-price {
  font-size: 1.1rem;
  color: var(--sb-muted);
  text-decoration: line-through;
}
.sb-purchase-card__saving {
  background: #dcfce7;
  color: #166534;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
}
.sb-purchase-card .sb-btn {
  margin-bottom: 0.6rem;
}

.sb-btn--enrolled {
  background: #d1fae5;
  color: #065f46;
  border: none;
  cursor: default;
}
.sb-btn--in-cart {
  background: var(--sb-primary-light, #eff6ff);
  color: var(--sb-primary);
  border: 2px solid var(--sb-primary);
}

.sb-purchase-card__features {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.sb-purchase-card__features li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--sb-text-light);
}

/* Course body */
.sb-course-body {
  padding-top: 3rem;
  padding-bottom: 4rem;
}
.sb-course-body__section {
  margin-bottom: 2.5rem;
}
.sb-course-body__section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--sb-heading);
  margin-bottom: 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--sb-border, #e2e8f0);
}
.sb-prose {
  line-height: 1.7;
  color: var(--sb-text);
}
.sb-prose p {
  margin-bottom: 1rem;
}

.sb-syllabus-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.6rem;
}
.sb-syllabus-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  background: var(--sb-bg-light, #f8fafc);
  border-radius: 8px;
  border: 1px solid var(--sb-border, #e2e8f0);
}
.sb-syllabus-list li .sb-icon--check {
  color: #059669;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.sb-highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}
.sb-highlight {
  background: var(--sb-bg-light, #f8fafc);
  border: 1px solid var(--sb-border, #e2e8f0);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.sb-highlight .sb-icon--md {
  font-size: 1.5rem;
  color: var(--sb-primary);
}
.sb-highlight strong {
  font-size: 0.95rem;
  color: var(--sb-heading);
}
.sb-highlight p {
  font-size: 0.82rem;
  color: var(--sb-muted);
  margin: 0;
}

/* Mobile buy bar */
.sb-mobile-buy-bar {
  display: none;
  position: sticky;
  bottom: 0;
  left: 0;
  right: 0;
  background: #fff;
  border-top: 2px solid var(--sb-border, #e2e8f0);
  padding: 0.75rem 1rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  z-index: 200;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
}
.sb-mobile-buy-bar__price {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--sb-primary);
}

/* Responsive */
@media (max-width: 900px) {
  .sb-single-hero__inner {
    grid-template-columns: 1fr;
  }
  .sb-purchase-card {
    position: static;
    order: -1;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  }
  .sb-mobile-buy-bar {
    display: flex;
  }
  .sb-purchase-card {
    display: none;
  }
}
@media (max-width: 600px) {
  .sb-syllabus-list {
    grid-template-columns: 1fr;
  }
  .sb-highlights-grid {
    grid-template-columns: 1fr 1fr;
  }
}