@import url('https://fonts.googleapis.com/css2?family=Song+Myung&family=IBM+Plex+Sans+KR:wght@400;700&display=swap');

:root {
  --bg: #F5F8FB;
  --text: #182430;
  --primary: #3A6EA5;
  --secondary: #C4D5E5;
  --font-display: 'Song Myung', serif;
  --font-body: 'IBM Plex Sans KR', sans-serif;
}

.toc-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 1080px;
  margin: 8px auto 56px;
  padding: 0 20px;
}
.toc { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 4px; }
.toc a {
  white-space: nowrap;
  font-size: 0.86rem;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--secondary);
  color: var(--text);
  opacity: 0.75;
}
.toc a.active { background: var(--primary); border-color: var(--primary); color: #fff; opacity: 1; }
.toc-body article { margin-bottom: 34px; scroll-margin-top: 90px; }
.toc-body h2 { font-family: var(--font-display); font-weight: 400; font-size: 1.2rem; color: var(--primary); margin-bottom: 10px; }
.toc-body p { font-size: 0.97rem; }
@media (min-width: 1024px) {
  .toc-layout { flex-direction: row; align-items: flex-start; gap: 44px; }
  .toc { flex-direction: column; flex: 0 0 190px; position: sticky; top: 84px; overflow-x: visible; }
  .toc a { text-align: left; }
  .toc-body { flex: 1; }
}