.study-tree-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--navle-ink-soft);
  font-size: 0.92rem;
}

.study-tree-breadcrumbs a:hover,
.study-tree-breadcrumbs a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.study-tree-breadcrumbs span[aria-current='page'] {
  color: var(--navle-ink);
  font-weight: 700;
}

.study-tree-summary-grid {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
}

.study-tree-summary-grid article {
  border-radius: 22px;
  border: 1px solid var(--navle-line);
  background: rgba(255, 255, 255, 0.68);
  padding: 18px;
}

.study-tree-summary-grid span {
  display: block;
  margin-bottom: 10px;
  color: var(--navle-ink-soft);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.study-tree-summary-grid strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.35rem;
  letter-spacing: -0.04em;
}

.study-tree-summary-grid p {
  margin: 0;
  color: var(--navle-ink-soft);
}

.study-tree-card-grid {
  display: grid;
  gap: 18px;
}

.study-tree-card {
  display: block;
  border: 1px solid var(--navle-line);
  background: rgba(255, 255, 255, 0.88);
  border-radius: 24px;
  box-shadow: var(--navle-shadow-soft);
  padding: 22px;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.study-tree-card:hover,
.study-tree-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--navle-line-strong);
  box-shadow: var(--navle-shadow);
  outline: none;
}

.study-tree-card h3 {
  margin: 0;
}

.study-tree-card p {
  margin: 0;
  color: var(--navle-ink-soft);
}

.study-tree-card:not(.study-tree-card--topic) > p {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  overflow: hidden;
}

@media (max-width: 759px) {
  .study-tree-card:not(.study-tree-card--topic) > p {
    -webkit-line-clamp: 2;
  }
}

.study-tree-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.study-tree-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  color: var(--navle-ink-soft);
  font-size: 0.92rem;
}

.study-tree-card__meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.study-tree-card__meta span::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--navle-accent);
}

.study-tree-count,
.study-tree-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.study-tree-count {
  border: 1px solid var(--navle-line);
  background: rgba(14, 107, 105, 0.08);
  color: var(--navle-brand-strong);
}

.study-tree-status.is-live {
  border: 1px solid var(--green-bdr);
  background: var(--green-bg);
  color: var(--green-text);
}

.study-tree-status.is-framework {
  border: 1px solid var(--amber-bdr);
  background: var(--amber-bg);
  color: var(--amber-text);
}

.study-tree-status.is-neutral {
  border: 1px solid var(--navle-line);
  background: rgba(255, 255, 255, 0.84);
  color: var(--navle-ink);
}

.study-tree-inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.study-tree-inline-list li {
  border-radius: 999px;
  border: 1px solid var(--navle-line);
  background: rgba(255, 255, 255, 0.78);
  padding: 8px 12px;
  color: var(--navle-ink-soft);
  font-size: 0.9rem;
}

.study-tree-card--topic {
  min-height: 100%;
}

.study-tree-topic-hero {
  gap: 18px;
}

.study-tree-topic-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.study-tree-status-panel {
  align-self: stretch;
}

.study-tree-panel-title {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 4vw, 2.35rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.study-tree-status-list {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--navle-ink-soft);
}

.study-tree-status-list li + li {
  margin-top: 10px;
}

.study-tree-note {
  margin-top: 18px;
  border-radius: 20px;
  border: 1px solid var(--navle-line);
  background: rgba(255, 255, 255, 0.72);
  padding: 16px;
}

.study-tree-note strong {
  display: block;
  margin-bottom: 8px;
}

.study-tree-note p {
  margin: 0;
  color: var(--navle-ink-soft);
}

.study-tree-note a {
  color: var(--navle-brand-strong);
  font-weight: 700;
}

.study-tree-note a:hover,
.study-tree-note a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.study-tree-anchor-shell {
  display: grid;
  gap: 14px;
}

.study-tree-anchor-shell h2 {
  margin: 0;
}

.study-tree-anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.study-tree-anchor-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--navle-line);
  background: rgba(255, 255, 255, 0.88);
  color: var(--navle-ink);
  font-weight: 700;
}

.study-tree-anchor-list a:hover,
.study-tree-anchor-list a:focus-visible {
  border-color: var(--navle-line-strong);
  background: rgba(14, 107, 105, 0.08);
  outline: none;
}

.study-tree-section-grid {
  display: grid;
  gap: 18px;
  width: min(calc(100% - 32px), var(--navle-container));
  margin: 0 auto;
}

.study-tree-section {
  padding: 28px;
}

.study-tree-section h2 {
  margin-bottom: 14px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.study-tree-section p {
  margin: 0;
  color: var(--navle-ink-soft);
}

@media (min-width: 760px) {
  .study-tree-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-tree-card-grid--topics,
  .study-tree-section-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .study-tree-summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-tree-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .study-tree-topic-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(320px, 1fr);
  }
}

@media (max-width: 759px) {
  .study-tree-card__top {
    flex-direction: column;
  }
}