.tutorial-main { padding-top: 64px; padding-bottom: 72px; }
.tutorial-intro { max-width: 880px; margin-bottom: 64px; }
.tutorial-intro h1 { font-size: clamp(36px, 5vw, 62px); line-height: 1.12; letter-spacing: -.04em; margin: 20px 0; text-wrap: balance; }
.tutorial-lead { font-size: 21px; color: var(--muted); max-width: 740px; }
.tutorial-meta { color: var(--muted); font-size: 14px; margin: 24px 0; }
.tutorial-meta time { white-space: nowrap; }
.tutorial-nav { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
.tutorial-nav a:hover { color: var(--ice); }
.tutorial-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 56px; align-items: start; }
.tutorial-toc { position: sticky; top: 100px; border-top: 1px solid var(--line); padding-top: 24px; }
.tutorial-toc ol { list-style: none; padding: 0; margin: 16px 0; }
.tutorial-toc li { margin: 0 0 16px; font-size: 14px; }
.tutorial-toc a { color: var(--muted); }
.tutorial-toc a:hover { color: var(--ice); }
.tutorial-article { min-width: 0; }
.tutorial-article section { scroll-margin-top: 100px; margin-bottom: 64px; }
.tutorial-article h2 { font-size: clamp(24px, 3vw, 30px); line-height: 1.3; margin: 0 0 24px; }
.tutorial-article p, .tutorial-article li { color: var(--muted); line-height: 1.85; }
.tutorial-article strong { color: var(--text); font-weight: 600; }
.tutorial-article li { padding-left: 4px; margin-bottom: 12px; }
.tutorial-article ol, .tutorial-article ul { padding-left: 24px; }
.tutorial-article a { color: var(--ice); text-decoration: underline; text-underline-offset: 4px; }
.tutorial-article pre { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; white-space: pre-wrap; overflow-wrap: anywhere; }
.tutorial-article code { font-size: .9em; overflow-wrap: anywhere; }
.tutorial-article kbd { font-family: inherit; font-size: .9em; border: 1px solid var(--line); border-radius: 4px; padding: 2px 5px; color: var(--text); background: var(--surface); }
.tutorial-article figure { margin: 28px 0; }
.tutorial-article figure a { display: block; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.tutorial-article img { display: block; width: 100%; height: auto; }
.tutorial-article figcaption { color: var(--muted); margin-top: 12px; font-size: 13px; line-height: 1.6; }
.tutorial-source { border-top: 1px solid var(--line); padding-top: 24px; font-size: 13px; }
@media (max-width: 900px) {
  .tutorial-layout { grid-template-columns: 1fr; gap: 24px; }
  .tutorial-toc { position: static; }
  .tutorial-toc ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
}
@media (max-width: 640px) {
  .tutorial-main { padding-top: 36px; }
  .tutorial-intro { margin-bottom: 40px; }
  .tutorial-lead { font-size: 18px; }
  .tutorial-nav { gap: 16px; font-size: 14px; }
  .tutorial-toc ol { grid-template-columns: 1fr; }
  .tutorial-article section { margin-bottom: 44px; }
}