:root {
  --primary-navy: #063B5C;
  --dark-navy: #062F49;
  --accent-teal: #159A96;
  --light-teal: #E8F6F5;
  --bg-page: #F7F8FA;
  --card-bg: #FFFFFF;
  --text-primary: #17324D;
  --text-secondary: #718096;
  --border-color: #E5E9ED;
  --gold-accent: #F2B233;
  --warm-quote-bg: #FFF9ED;
  --status-green: #10B981;
  --status-green-bg: #ECFDF5;
}

/* Ensure app-container does NOT squish detail page on tablet or split window */
.app-container:has(.detail-page),
body:has(.detail-page) .app-container {
  max-width: 100% !important;
  width: 100% !important;
}

.detail-page {
  min-height: 100vh;
  padding: 28px 24px 80px;
  background-color: var(--bg-page);
  color: var(--text-primary);
}

.detail-container {
  width: min(1100px, 100%);
  margin: 0 auto;
}

/* Top Back Link */
.detail-back {
  margin-bottom: 20px;
}

.detail-back a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-navy);
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
}

.detail-back a i {
  color: var(--accent-teal);
  font-size: 14px;
}

/* =========================================================
   HERO / DETAIL KELAS CARD (Matches Reference Mockup)
   ========================================================= */
.course-detail-hero-card {
  display: grid;
  grid-template-columns: minmax(320px, 400px) minmax(0, 1fr);
  gap: 28px;
  padding: 24px;
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: var(--card-bg);
  box-shadow: 0 2px 10px rgba(6, 59, 92, 0.04);
  margin-bottom: 24px;
  align-items: center;
}

.hero-cover-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 14px;
  overflow: hidden;
  background: #E5E9ED;
}

.hero-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.detail-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.detail-badge.free {
  background: var(--status-green-bg);
  color: var(--status-green);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.detail-badge.premium {
  background: var(--warm-quote-bg);
  color: #D97706;
  border: 1px solid var(--gold-accent);
}

.hero-info-wrapper {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.badge-row {
  margin-bottom: 10px;
}

.detail-pill-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
}

.detail-pill-tag.free {
  background: var(--status-green-bg);
  color: var(--status-green);
}

.detail-pill-tag.premium {
  background: var(--warm-quote-bg);
  color: #D97706;
  border: 1px solid var(--gold-accent);
}

.hero-course-title {
  margin: 0 0 12px;
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-navy);
  line-height: 1.35;
}

.hero-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-secondary);
}

.hero-meta-row .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta-row .rating {
  color: var(--gold-accent);
  font-weight: 700;
}

.hero-meta-row .rating small {
  color: var(--text-secondary);
  font-weight: 400;
}

.hero-course-desc {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-price-action-row {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.price-display span {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-teal);
}

.cta-button-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cta-button-group form {
  flex: 1;
}

.cta-button-group .btn-primary-action,
.cta-button-group button[type="submit"],
.cta-button-group .primary-cta {
  width: 100%;
  height: 48px;
  padding: 0 24px;
  border: none;
  border-radius: 10px;
  background: var(--gold-accent);
  color: #17324D;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: opacity 0.2s;
}

.cta-button-group .btn-primary-action:hover,
.cta-button-group button[type="submit"]:hover {
  opacity: 0.9;
}

.btn-bookmark-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-primary);
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 16px;
  transition: border-color 0.2s;
}

.btn-bookmark-icon:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}

/* =========================================================
   MIDDLE SECTION: PROGRESS & PENGAJAR ROW
   ========================================================= */
.middle-cards-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.middle-card {
  padding: 20px;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  background: var(--card-bg);
  box-shadow: 0 2px 8px rgba(6, 59, 92, 0.03);
}

.progress-info-card .card-head-title h3 {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary-navy);
}

.progress-bar-container {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}

.progress-bar-track {
  flex: 1;
  height: 10px;
  background: var(--border-color);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-teal);
  border-radius: inherit;
  transition: width 0.3s ease;
}

.progress-percentage-label {
  font-size: 16px;
  font-weight: 800;
  color: var(--primary-navy);
}

.progress-subtitle-text {
  margin: 0;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Instructor card */
.instructor-profile {
  display: flex;
  align-items: center;
  gap: 14px;
}

.instructor-avatar-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--light-teal);
  display: grid;
  place-items: center;
  color: var(--accent-teal);
  font-size: 22px;
  flex: 0 0 52px;
}

.instructor-avatar-circle img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.instructor-details strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.instructor-details span {
  font-size: 13px;
  color: var(--text-secondary);
}

/* =========================================================
   BOTTOM SECTION: DAFTAR MATERI
   ========================================================= */
.curriculum-list-section {
  padding: 24px;
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: var(--card-bg);
  box-shadow: 0 2px 10px rgba(6, 59, 92, 0.04);
}

.section-title-bar h2 {
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-navy);
}

.curriculum-items-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.curriculum-item-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--card-bg);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.curriculum-item-card.available:hover {
  border-color: var(--accent-teal);
  background: var(--light-teal);
}

.item-status-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 14px;
  flex: 0 0 36px;
}

.item-status-icon.completed {
  background: var(--status-green);
  color: #FFFFFF;
}

.item-status-icon.active {
  border: 2px solid var(--accent-teal);
  color: var(--accent-teal);
  background: #FFFFFF;
}

.item-status-icon.locked {
  background: var(--bg-page);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.item-info {
  flex: 1;
}

.item-info strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.item-info span {
  font-size: 13px;
  color: var(--text-secondary);
}

.item-action-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 14px;
  flex: 0 0 36px;
}

.item-action-icon.play {
  background: var(--status-green-bg);
  color: var(--status-green);
}

.item-action-icon.locked {
  color: var(--accent-teal);
  border: 1px solid var(--accent-teal);
  border-radius: 8px;
  width: 32px;
  height: 32px;
}

.expand-all-wrapper {
  margin-top: 20px;
  text-align: center;
}

.expand-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.expand-toggle-btn:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}

/* Mobile responsive */
@media (max-width: 820px) {
  .course-detail-hero-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .middle-cards-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}