/* ============================================================
   detail.css — Course landing/enrollment page styles
   Inherits design variables from tokens.css
   ============================================================ */

/* ── PAGE LAYOUT ─────────────────────────────────────────────── */
.course-detail-container {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.course-detail-main {
  min-width: 0; /* Prevents flex/grid blowouts */
}

/* ── HEADER ─────────────────────────────────────────────────── */
.course-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 24px;
}

.course-header__subject {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 12px;
}
.course-header__subject:hover {
  text-decoration: underline;
}

.course-header__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 16px;
}

/* ── STATS DASHBOARD ────────────────────────────────────────── */
.stats-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 16px;
  background: var(--surface-raised);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 40px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-item__label {
  font-family: var(--font-sans);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
}

.stat-item__value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.stat-item__value--badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 3px;
  width: fit-content;
}

/* ── READABILITY SECTION ─────────────────────────────────────── */
.editorial-section {
  max-width: 70ch; /* Reading measure optimized for readability (~65-75 chars) */
  margin-bottom: 48px;
}

.editorial-section__title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--hairline);
  color: var(--text);
}

.editorial-section__content {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
}

.editorial-section__content p {
  margin: 0 0 16px;
}

.editorial-section__content ul {
  margin: 0 0 20px;
  padding-left: 20px;
}

.editorial-section__content li {
  margin-bottom: 8px;
}

/* ── ACCORDION SYLLABUS ──────────────────────────────────────── */
.curriculum-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.curriculum-module {
  background: var(--surface-raised);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  overflow: hidden;
}

.curriculum-module__summary {
  list-style: none; /* Hide default triangle on Chrome/Firefox */
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  outline: none;
  background: var(--surface-raised);
  transition: background var(--duration) var(--ease);
}
.curriculum-module__summary::-webkit-details-marker {
  display: none; /* Hide default triangle on Safari */
}

.curriculum-module__summary:hover {
  background: var(--hover);
}

.curriculum-module__summary-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.curriculum-module__step {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-soft);
  text-transform: uppercase;
}

.curriculum-module__title {
  font-size: 15px;
  color: var(--text);
}

.curriculum-module__icon {
  width: 16px;
  height: 16px;
  color: var(--text-soft);
  transition: transform var(--duration) var(--ease);
}

/* Rotate indicator icon when detail is open */
.curriculum-module[open] .curriculum-module__icon {
  transform: rotate(180deg);
}

.curriculum-module__details {
  border-top: 1px solid var(--hairline);
  padding: 20px;
  background: var(--surface-sunken);
}

.curriculum-module__desc {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0 0 16px;
  line-height: 1.5;
}

.lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text);
}

.lesson-item__icon {
  color: var(--text-soft);
  flex-shrink: 0;
}

/* ── INSTRUCTOR PROFILE CARD ─────────────────────────────────── */
.instructor-card {
  display: flex;
  gap: 24px;
  background: var(--surface-raised);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 24px;
  margin-top: 24px;
}

.instructor-card__avatar-wrap {
  flex-shrink: 0;
}

.instructor-card__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--hairline-strong);
  background: var(--surface-sunken);
}

.instructor-card__avatar-fallback {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--text-on-accent);
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  border: 2px solid var(--hairline-strong);
  user-select: none;
}

.instructor-card__info {
  flex: 1;
}

.instructor-card__name {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 4px;
  color: var(--text);
}

.instructor-card__title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-soft);
  margin-bottom: 12px;
}

.instructor-card__bio {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-soft);
  margin: 0;
}

/* ── STICKY SIDEBAR CARD ────────────────────────────────────── */
.course-detail-sidebar {
  position: relative;
}

.sticky-enroll-card {
  position: sticky;
  top: 96px; /* Offset to clear the sticky top header.css */
  background: var(--surface-raised);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.sticky-enroll-card__thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--surface-sunken);
  border-bottom: 1px solid var(--hairline);
}

.sticky-enroll-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sticky-enroll-card__body {
  padding: 24px;
}

.sticky-enroll-card__cta {
  width: 100%;
  margin-bottom: 20px;
}
.c-btn--primary {
  background: var(--text);
  color: var(--surface);
  border-color: var(--text);
  cursor: pointer;
}
.c-btn--primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-on-accent);
}
.sticky-enroll-card__cta button,
.sticky-enroll-card__cta .c-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 46px;
  font-size: 14px;
  font-weight: 700;
}

.sticky-enroll-card__features-title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
  margin: 0 0 12px;
}

.sticky-enroll-card__features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sticky-enroll-card__feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text);
}

.sticky-enroll-card__feature-icon {
  color: var(--accent);
  flex-shrink: 0;
}

/* ── STUDENT FEEDBACK & REVIEWS ─────────────────────────────── */
.feedback-container {
  display: flex;
  gap: 32px;
  background: var(--surface-raised);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 32px;
  margin-top: 24px;
}

.feedback-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex-shrink: 0;
  width: 140px;
}

.feedback-summary__average {
  font-family: var(--font-sans);
  font-size: 48px;
  font-weight: 800;
  color: #fbbf24;
  line-height: 1;
}

.feedback-summary__stars {
  margin: 8px 0;
  font-size: 16px;
}

.feedback-summary__label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-soft);
  letter-spacing: 0.05em;
}

.feedback-bars {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.feedback-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
}

.feedback-bar-label {
  width: 48px;
  text-align: right;
  color: var(--text-soft);
  font-weight: 500;
}

.feedback-bar-track {
  flex: 1;
  height: 8px;
  background: var(--surface-sunken);
  border-radius: 4px;
  overflow: hidden;
}

.feedback-bar-fill {
  height: 100%;
  background: #fbbf24;
  border-radius: 4px;
}

.feedback-bar-percentage {
  width: 36px;
  color: var(--text-soft);
  font-weight: 500;
}

/* Reviews Feed */
.reviews-feed {
  margin-top: 32px;
}

.reviews-feed__title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 20px;
  color: var(--text);
}

.review-card {
  padding: 24px 0;
  border-bottom: 1px solid var(--hairline);
}

.review-card:last-child {
  border-bottom: none;
}

.review-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface-sunken);
  border: 1px solid var(--hairline-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
}

.review-meta__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.review-author {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.review-stars-date {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.review-date {
  font-size: 11px;
  color: var(--text-soft);
}

.review-text {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-soft);
  margin: 0;
}

/* Stars SVG-like display */
.stars-display {
  display: inline-block;
  font-size: 14px;
  line-height: 1;
  position: relative;
  color: var(--hairline-strong, #cbd5e1);
}

.stars-display::before {
  content: "★★★★★";
  position: absolute;
  top: 0;
  left: 0;
  width: calc(var(--rating) / 5 * 100%);
  overflow: hidden;
  color: #fbbf24;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .feedback-container {
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 24px;
  }
}