/* Tutorial reading layout; all assets and article content work offline. */
.tutorial-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(32px, 5vw, 80px);
  width: min(calc(100% - 2 * var(--page-pad)), 1200px);
  margin-inline: auto;
  padding-block: 48px 72px;
}
.tutorial-sidebar { position: sticky; top: calc(var(--header-height) + 24px); align-self: start; max-height: calc(100dvh - var(--header-height) - 48px); overflow-y: auto; }
.tutorial-sidebar h2 { margin: 0 0 20px; font-size: 16px; font-weight: 500; }
.tutorial-topics { display: grid; gap: 8px; margin-bottom: 20px; }
.tutorial-topic { display: flex; min-height: 44px; align-items: center; padding: 10px 12px; font-size: 13px; line-height: 1.6; border-left: 2px solid transparent; }
.tutorial-topic[aria-current="page"] { color: var(--theme-accent); background: var(--theme-surface); border-left-color: var(--theme-accent); }
.tutorial-toc { border-top: 1px solid var(--theme-line); padding-top: 18px; }
.tutorial-toc summary { cursor: pointer; font-size: 13px; padding-block: 8px; }
.tutorial-toc a { display: block; padding: 8px 0; color: var(--theme-muted); font-size: 12px; line-height: 1.6; }
.tutorial-sidebar a:hover, .tutorial-article a:hover { color: var(--theme-accent); }
.tutorial-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; margin-bottom: 24px; }
.tutorial-language { display: inline-flex; flex-shrink: 0; padding: 3px; gap: 3px; border: 1px solid var(--theme-line); border-radius: 6px; }
.tutorial-article .tutorial-language a { display: inline-flex; min-height: 38px; align-items: center; justify-content: center; padding: 6px 16px; border-radius: 3px; color: var(--theme-muted); text-decoration: none; font-size: 13px; }
.tutorial-article .tutorial-language a[aria-current="page"] { color: var(--action-text); background: var(--theme-accent); }
.tutorial-language a:hover { background: var(--theme-hover); }
.tutorial-article { min-width: 0; max-width: 840px; line-height: 1.85; overflow-wrap: anywhere; }
.tutorial-article .breadcrumb { margin: 0; font-size: 12px; flex-wrap: wrap; }
.tutorial-article h1 { margin: 0 0 24px; font-size: clamp(28px, 3.6vw, 44px); line-height: 1.35; font-weight: 500; }
.tutorial-article h2 { margin: 44px 0 16px; padding-top: 20px; border-top: 1px solid var(--theme-line); font-size: 25px; line-height: 1.4; font-weight: 500; scroll-margin-top: calc(var(--header-height) + 16px); }
.tutorial-article p, .tutorial-article li { font-size: 15px; color: var(--theme-muted); }
.tutorial-article p { margin: 16px 0; }
.tutorial-article ul, .tutorial-article ol { padding-left: 24px; }
.tutorial-article li + li { margin-top: 6px; }
.tutorial-article a { color: var(--theme-accent); text-decoration: underline; text-underline-offset: 4px; }
.tutorial-article .breadcrumb a { text-decoration: none; }
.tutorial-article code { font-family: var(--font-mono); font-size: .85em; }
.tutorial-article :not(pre) > code { color: var(--theme-ink); background: var(--theme-surface); padding: 2px 5px; border-radius: 3px; }
.tutorial-note { margin-bottom: 28px; border-left: 2px solid var(--theme-accent); padding: 12px 16px; background: var(--theme-surface); }
.tutorial-note p { margin: 0; font-size: 13px; }
.tutorial-code { margin: 22px 0; border: 1px solid var(--theme-line); border-radius: 6px; overflow: hidden; }
.tutorial-code-bar { display: flex; align-items: center; justify-content: space-between; padding: 4px 16px; background: var(--theme-surface); font-family: var(--font-mono); font-size: 11px; color: var(--theme-muted); }
.tutorial-copy { min-height: 36px; border: 0; padding: 6px 12px; background: transparent; cursor: pointer; font: inherit; }
.tutorial-copy:hover { color: var(--theme-accent); }
.tutorial-copy-status { font-family: var(--font-sans); }
.tutorial-article pre { min-height: 0; margin: 0; padding: 20px; overflow: auto; color: var(--theme-ink); background: #141419; font-size: 13px; line-height: 1.85; tab-size: 4; }
.tutorial-article pre code { font-size: inherit; }
.tutorial-table, .tutorial-equation { overflow-x: auto; margin: 22px 0; }
.tutorial-article table { border-collapse: collapse; width: 100%; font-size: 14px; }
.tutorial-article th, .tutorial-article td { padding: 10px 14px; border: 1px solid var(--theme-line); text-align: left; }
.tutorial-article th { background: var(--theme-surface); font-weight: 500; }
.tutorial-equation { padding: 20px 12px; border-block: 1px solid var(--theme-line); }
.tutorial-equation math { font-size: 19px; width: max-content; min-width: 100%; }
.tutorial-source { margin-top: 40px; font-size: 13px; }
@media (max-width: 980px) {
  .tutorial-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; padding-top: 28px; }
  .tutorial-sidebar { position: static; max-height: none; }
  .tutorial-topics { display: flex; flex-wrap: wrap; gap: 8px; }
  .tutorial-toc nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
  .tutorial-article { max-width: none; }
}
@media (max-width: 480px) {
  .tutorial-toc nav { grid-template-columns: 1fr; }
  .tutorial-article pre { padding: 16px; font-size: 12px; }
  .tutorial-article h2 { font-size: 22px; }
}
@media (max-height: 480px) { .tutorial-sidebar { position: static; max-height: none; } }