:root {
  color-scheme: light;
  --brand: #6547e8;
  --brand-soft: #f1edff;
  --ink: #17151f;
  --muted: #696476;
  --line: #e8e5ef;
  --surface: #fff;
  --sidebar: #faf9fc;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "Plus Jakarta Sans", Inter, "SF Pro Display", ui-sans-serif, system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); }

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 1px solid var(--brand);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 10;
  padding: 8px 12px;
  background: #fff;
  transform: translateY(-150%);
}

.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 32px;
  border-bottom: 1px solid var(--line);
  background: rgb(255 255 255 / 94%);
  backdrop-filter: blur(16px);
}

.brand { display: inline-flex; }
.brand img { display: block; width: auto; height: 32px; }

.header-actions { display: flex; align-items: center; gap: 20px; }
.header-actions a { color: var(--ink); font-weight: 500; text-decoration: none; }
.header-actions .start-link { padding: 8px 16px; border-radius: 8px; background: var(--ink); color: #fff; }

.guide-layout {
  display: grid;
  grid-template-columns: minmax(264px, 320px) minmax(0, 1fr);
  min-height: calc(100vh - 72px);
}

.guide-sidebar {
  position: sticky;
  top: 72px;
  height: calc(100vh - 72px);
  overflow: auto;
  border-right: 1px solid var(--line);
  background: var(--sidebar);
}

.guide-nav { padding: 24px 16px 40px; }
.guide-home { display: block; margin: 0 8px 20px; color: var(--ink); font-size: 20px; font-weight: 600; text-decoration: none; }
.search-label { display: block; margin: 0 8px 6px; color: var(--muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.guide-search { width: calc(100% - 16px); height: 40px; margin: 0 8px 20px; padding: 0 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; font: inherit; }
.search-empty { margin: 8px; color: var(--muted); }
.guide-part { margin-bottom: 14px; }
.guide-part-header { display: grid; grid-template-columns: minmax(0, 1fr) 32px; align-items: center; }
.guide-part ol { margin: 4px 0 0; padding: 0; list-style: none; }
.guide-part ol[hidden] { display: none; }
.guide-part a { display: grid; grid-template-columns: 42px 1fr; gap: 4px; align-items: baseline; padding: 7px 8px; border-radius: 7px; color: #3f3a49; font-size: 14px; font-weight: 500; line-height: 1.35; text-decoration: none; }
.guide-part a span { color: #746d82; font-variant-numeric: tabular-nums; }
.guide-part .part-link { display: block; color: var(--ink); font-weight: 600; }
.guide-part .part-link span { display: block; margin-bottom: 2px; color: var(--brand); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.part-toggle { display: grid; width: 32px; height: 32px; place-items: center; padding: 0; border: 0; border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer; }
.part-toggle::after { width: 7px; height: 7px; border-right: 1.5px solid currentcolor; border-bottom: 1.5px solid currentcolor; content: ""; transform: rotate(-45deg); transition: transform 160ms ease; }
.part-toggle[aria-expanded="true"]::after { transform: rotate(45deg); }
.part-toggle:hover { background: #ece8f5; color: var(--ink); }
.guide-sidebar[data-searching] .part-toggle { visibility: hidden; }
.guide-part a:hover, .guide-part a.active, .guide-home.active { background: var(--brand-soft); color: #4e32cc; }
.guide-part[hidden], .guide-part li[hidden], .part-link[hidden] { display: none; }

.guide-content { width: min(100%, 960px); padding: 64px 72px 96px; }
.guide-content > :first-child { margin-top: 0; }
.guide-content h1 { margin: 0 0 20px; font-size: clamp(36px, 5vw, 58px); font-weight: 600; line-height: 1.06; letter-spacing: -.03em; }
.guide-content h2 { margin: 56px 0 16px; font-size: 28px; font-weight: 600; line-height: 1.2; letter-spacing: -.02em; }
.guide-content h3 { margin: 36px 0 12px; font-size: 21px; font-weight: 600; line-height: 1.3; }
.guide-content p, .guide-content li { font-size: 17px; }
.guide-content img { display: block; width: auto; max-width: 100%; height: auto; margin: 28px auto; border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 14px 40px rgb(35 25 70 / 10%); object-fit: scale-down; }
.guide-content table { display: block; width: 100%; margin: 24px 0; overflow-x: auto; border-collapse: collapse; }
.guide-content th, .guide-content td { min-width: 180px; padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.guide-content th { background: var(--sidebar); }
.guide-content code { padding: 2px 5px; border-radius: 5px; background: #f2f0f6; font-size: .9em; }
.guide-content pre { overflow: auto; padding: 18px; border-radius: 10px; background: #201d29; color: #fff; }
.guide-content pre code { padding: 0; background: none; }
.guide-content blockquote { margin: 24px 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--brand); color: var(--muted); }

.guide-hero { margin-bottom: 48px; }
.guide-hero .eyebrow { margin: 0 0 12px; color: var(--brand); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; }
.guide-hero > p:last-child { max-width: 760px; color: var(--muted); font-size: 19px; }
.part-grid { display: grid; gap: 20px; }
.part-card { padding: 28px; border: 1px solid var(--line); border-radius: 14px; }
.part-card > p:first-child { margin: 0 0 4px; color: var(--brand); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; }
.part-card h2 { margin: 0 0 8px; font-size: 25px; }
.part-card h2 a { color: var(--ink); text-decoration: none; }
.part-card > p { color: var(--muted); }
.part-card ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 24px; margin: 20px 0 0; padding: 0; list-style: none; }
.part-card li a { display: grid; grid-template-columns: 42px 1fr; color: var(--ink); text-decoration: none; }
.part-card li span { color: var(--brand); font-variant-numeric: tabular-nums; }

.site-footer { display: flex; gap: 24px; padding: 24px 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.site-footer span { margin-right: auto; }
.site-footer a { color: inherit; }
.toc-toggle { display: none; }

@media (max-width: 900px) {
  .site-header { min-height: 64px; padding: 12px 20px; }
  .header-actions > a:first-child { display: none; }
  .guide-layout { display: block; }
  .toc-toggle { display: block; position: sticky; top: 64px; z-index: 4; width: 100%; height: 48px; padding: 0 20px; border: 0; border-bottom: 1px solid var(--line); background: #fff; color: var(--ink); text-align: left; font: inherit; font-weight: 600; }
  .guide-sidebar { display: none; position: fixed; inset: 112px 0 0; z-index: 4; height: auto; border: 0; }
  .guide-sidebar[data-open] { display: block; }
  .guide-content { padding: 40px 20px 72px; }
  .guide-content h1 { font-size: 38px; }
  .part-card { padding: 20px; }
  .part-card ol { grid-template-columns: 1fr; }
  .site-footer { flex-wrap: wrap; padding: 24px 20px; }
  .site-footer span { width: 100%; }
}