/* Shared organization and navigation styles for lesson index pages. */

.lesson-index-page .lesson-page {
  max-width: 1180px;
}

.index-hero {
  margin-top: 6px;
  padding-bottom: 10px;
}

.index-hero .chapter-subtitle {
  max-width: 880px;
}

.index-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0 0;
}

.summary-stat {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  background: var(--panel-bg);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--page-bg) 35%, transparent);
}

.summary-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 1vw + 1rem, 1.7rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--accent-strong);
}

.summary-stat-label {
  display: block;
  margin-top: 5px;
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 650;
}

.index-section {
  margin-top: clamp(30px, 4vw, 52px);
}

.index-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
}

.index-section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 1vw + 1.05rem, 1.9rem);
  line-height: 1.2;
  color: var(--ink);
}

.index-section-copy {
  max-width: 690px;
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.course-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.course-card,
.resource-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 100%;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--panel-bg) 94%, var(--accent-soft)), var(--panel-bg));
  color: inherit;
  text-decoration: none;
  box-shadow: 0 14px 34px color-mix(in srgb, var(--page-bg) 32%, transparent);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.course-card:hover,
.course-card:focus-visible,
.resource-card:hover,
.resource-card:focus-visible {
  outline: none;
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 18px 42px color-mix(in srgb, var(--accent) 18%, transparent);
}

.course-step,
.card-kicker {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  min-height: 1.6rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.course-card-title,
.resource-card-title {
  margin: 13px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 0.5vw + 0.98rem, 1.3rem);
  line-height: 1.25;
  color: var(--ink);
}

.course-card-meta,
.resource-card-meta {
  margin: 7px 0 0;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 750;
}

.course-card-copy,
.resource-card-copy {
  margin: 9px 0 0;
  color: var(--ink-soft);
  font-size: 0.91rem;
  line-height: 1.5;
}

.card-action {
  margin-top: auto;
  padding-top: 14px;
  color: var(--accent-strong);
  font-size: 0.84rem;
  font-weight: 800;
}

.course-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--panel-border);
  border-left: 4px solid var(--accent);
  border-radius: 14px;
  background: var(--panel-bg);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.course-note strong {
  color: var(--ink);
}

.course-roadmap {
  margin-top: 24px;
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  background: var(--panel-bg);
}

.roadmap-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--ink);
}

.roadmap-copy {
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.roadmap-group {
  min-width: 0;
  padding: 13px;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  background: color-mix(in srgb, var(--panel-bg) 88%, var(--accent-soft));
}

.roadmap-group-title {
  margin: 0 0 9px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 800;
}

.roadmap-links {
  display: grid;
  gap: 7px;
}

.roadmap-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 7px 8px;
  border-radius: 9px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.82rem;
  line-height: 1.35;
}

.roadmap-link:hover,
.roadmap-link:focus-visible {
  outline: none;
  background: var(--accent-soft);
  color: var(--ink);
}

.roadmap-number {
  color: var(--accent-strong);
  font-weight: 850;
}

.lesson-index-page .module {
  scroll-margin-top: 92px;
  margin-top: 24px;
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  background: var(--panel-bg);
  box-shadow: 0 12px 30px color-mix(in srgb, var(--page-bg) 30%, transparent);
}

.lesson-index-page .module-head {
  margin-bottom: 14px;
  padding-bottom: 12px;
}

.lesson-index-page .module-name {
  font-size: clamp(1.15rem, 0.8vw + 1rem, 1.55rem);
}

.lesson-index-page .module-topic {
  font-size: 0.92rem;
}

.lesson-index-page .module-status {
  padding: 0.24rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.68rem;
}

.lesson-index-page .toc-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lesson-index-page .toc-list li {
  min-width: 0;
  padding: 0;
  border: 1px solid var(--hairline);
  border-radius: 13px;
  background: color-mix(in srgb, var(--panel-bg) 94%, var(--accent-soft));
  overflow: hidden;
}

.lesson-index-page .toc-list li:last-child {
  border-bottom: 1px solid var(--hairline);
}

.lesson-index-page .toc-link {
  height: 100%;
  padding: 13px 14px;
  border-radius: 12px;
}

.lesson-index-page .toc-link:hover,
.lesson-index-page .toc-link:focus-visible {
  outline: none;
  background: var(--accent-soft);
}

.lesson-index-page .toc-row {
  align-items: flex-start;
  gap: 9px;
}

.lesson-index-page .toc-num {
  min-width: 2.5rem;
  font-size: 0.82rem;
  line-height: 1.45;
}

.lesson-index-page .toc-title {
  font-size: 0.94rem;
  line-height: 1.35;
}

.lesson-index-page .toc-desc {
  margin: 6px 0 0 3.05rem;
  font-size: 0.8rem;
  line-height: 1.45;
}

.phase-label {
  margin: 34px 0 0;
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.phase-label + .module {
  margin-top: 10px;
}

@media (max-width: 900px) {
  .index-summary,
  .course-grid,
  .resource-grid,
  .roadmap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lesson-index-page .toc-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .index-summary,
  .course-grid,
  .resource-grid,
  .roadmap-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .index-section-head {
    display: block;
  }

  .lesson-index-page .module {
    padding: 14px;
  }

  .lesson-index-page .toc-desc {
    margin-left: 0;
  }

  .lesson-index-page .module-status {
    width: auto;
  }
}

@media print {
  .index-summary,
  .course-grid,
  .resource-grid,
  .roadmap-grid,
  .lesson-index-page .toc-list {
    display: block;
  }

  .summary-stat,
  .course-card,
  .resource-card,
  .roadmap-group,
  .lesson-index-page .module,
  .lesson-index-page .toc-list li {
    box-shadow: none;
    break-inside: avoid;
    margin-bottom: 10px;
  }
}