:root {
  --dev-ink: #111827;
  --dev-muted: #667085;
  --dev-line: #e6e9ef;
  --dev-surface: #ffffff;
  --dev-soft: #f7f8fb;
  --dev-accent: var(--md-primary, #0878f9);
}

.dev-topbar {
  position: sticky; top: 0; z-index: 60;
  height: 64px; border-bottom: 1px solid var(--dev-line);
  background: color-mix(in srgb, var(--md-surface, #fff) 92%, transparent);
  backdrop-filter: blur(16px) saturate(160%);
}
.dev-topbar-inner {
  max-width: 1480px; height: 100%; margin: 0 auto; padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.dev-brand { display: flex; align-items: center; gap: 10px; font-weight: 760; letter-spacing: -.02em; }
.dev-brand .t2-brand-mark { font-size: 21px; }
.dev-brand-product { font-size: 16px; }
.dev-brand-section { padding-left: 10px; border-left: 1px solid var(--dev-line); color: var(--dev-muted); font-weight: 620; }
.dev-global-nav { display: flex; align-items: center; gap: 24px; font-size: 13.5px; font-weight: 650; color: var(--dev-muted); }
.dev-global-nav a { transition: color .16s ease; }
.dev-global-nav a:hover, .dev-global-nav a.is-active { color: var(--dev-ink); }
.dev-admin-link { padding: 8px 12px; border: 1px solid var(--dev-line); border-radius: 9px; }

.dev-shell {
  max-width: 1480px; margin: 0 auto; min-height: calc(100vh - 64px);
  display: grid; grid-template-columns: 280px minmax(0, 1fr) 220px;
}
.dev-sidebar { border-right: 1px solid var(--dev-line); padding: 28px 22px 64px 28px; }
.dev-search-wrap { position: relative; margin-bottom: 28px; }
.dev-search-wrap i { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--dev-muted); }
.dev-search-wrap input {
  width: 100%; border: 1px solid var(--dev-line); border-radius: 10px;
  background: var(--dev-soft); color: var(--dev-ink); padding: 10px 12px 10px 36px; font: inherit; font-size: 13px;
}
.dev-search-wrap input:focus { outline: 2px solid color-mix(in srgb, var(--dev-accent) 18%, transparent); border-color: var(--dev-accent); }
.dev-nav-group { margin: 0 0 28px; }
.dev-nav-group h2 { margin: 0 0 8px; padding: 0 10px; color: #98a2b3; font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.dev-nav-item { display: block; padding: 8px 10px; border-radius: 8px; color: var(--dev-muted); font-size: 13.5px; line-height: 1.4; }
.dev-nav-item:hover { color: var(--dev-ink); background: var(--dev-soft); }
.dev-nav-item.is-active { color: var(--dev-accent); background: color-mix(in srgb, var(--dev-accent) 9%, transparent); font-weight: 700; }
.dev-nav-item[hidden], .dev-nav-group[hidden] { display: none; }

.dev-main { min-width: 0; padding: 28px 64px 96px; }
.dev-breadcrumb { display: flex; align-items: center; gap: 6px; margin-bottom: 42px; color: #98a2b3; font-size: 12.5px; }
.dev-article { max-width: 800px; margin: 0 auto; }
.dev-article-head { padding-bottom: 36px; border-bottom: 1px solid var(--dev-line); }
.dev-eyebrow { color: var(--dev-accent); font-size: 12px; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.dev-draft-badge { display: inline-block; margin-left: 8px; padding: 4px 8px; border-radius: 999px; background: #fff4e5; color: #b54708; font-size: 10px; font-weight: 850; letter-spacing: .05em; }
.dev-article-head h1 { margin: 10px 0 14px; color: var(--dev-ink); font-size: clamp(36px, 5vw, 54px); line-height: 1.08; letter-spacing: -.045em; }
.dev-article-head > p { max-width: 720px; margin: 0; color: var(--dev-muted); font-size: 17px; line-height: 1.7; }
.dev-article-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 22px; color: #98a2b3; font-size: 12px; }
.dev-article-meta span { display: inline-flex; align-items: center; gap: 5px; }

.dev-prose { padding: 40px 0 24px; color: #344054; font-size: 16px; line-height: 1.82; }
.dev-prose > h1:first-child { display: none; }
.dev-prose h2, .dev-prose h3, .dev-prose h4 { color: var(--dev-ink); letter-spacing: -.025em; scroll-margin-top: 88px; }
.dev-prose h2 { margin: 56px 0 16px; font-size: 29px; line-height: 1.3; }
.dev-prose h3 { margin: 36px 0 12px; font-size: 21px; }
.dev-prose h4 { margin: 28px 0 10px; font-size: 17px; }
.dev-prose p { margin: 0 0 20px; }
.dev-prose ul, .dev-prose ol { margin: 0 0 22px; padding-left: 24px; }
.dev-prose li { margin: 7px 0; padding-left: 3px; }
.dev-prose strong { color: var(--dev-ink); }
.dev-prose a { color: var(--dev-accent); text-decoration: underline; text-underline-offset: 3px; }
.dev-prose blockquote { margin: 24px 0; padding: 16px 20px; border-left: 3px solid var(--dev-accent); background: var(--dev-soft); color: var(--dev-muted); }
.dev-prose code { padding: 2px 6px; border: 1px solid var(--dev-line); border-radius: 6px; background: var(--dev-soft); color: #b42318; font: 500 13px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.dev-prose pre { margin: 24px 0 28px; padding: 20px 22px; overflow: auto; border: 1px solid #25304a; border-radius: 12px; background: #101828; box-shadow: 0 16px 30px rgba(16,24,40,.12); }
.dev-prose pre code { padding: 0; border: 0; background: transparent; color: #e4e7ec; font-size: 13px; white-space: pre; }
.dev-prose hr { margin: 48px 0; border: 0; border-top: 1px solid var(--dev-line); }
.dev-bottom-docs { margin-top: 50px; padding: 22px; border: 1px solid var(--dev-line); border-radius: 16px; background: var(--dev-soft); overflow: hidden; }
.dev-bottom-docs-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 15px; }
.dev-bottom-docs-head strong { color: var(--dev-ink); font-size: 15px; }
.dev-bottom-docs-head span { color: var(--dev-muted); font-size: 12px; }
.dev-bottom-docs-track { display: flex; gap: 10px; overflow-x: auto; padding: 2px 2px 10px; scroll-snap-type: x proximity; scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--dev-accent) 35%, transparent) transparent; }
.dev-bottom-doc-link { flex: 0 0 min(250px, 78vw); display: grid; gap: 5px; padding: 15px 16px; border: 1px solid var(--dev-line); border-radius: 12px; background: var(--dev-surface); scroll-snap-align: start; transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease; }
.dev-bottom-doc-link:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--dev-accent) 45%, var(--dev-line)); box-shadow: 0 10px 22px rgba(16,24,40,.08); }
.dev-bottom-doc-link > span { color: var(--dev-muted); font-size: 10.5px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.dev-bottom-doc-link > strong { color: var(--dev-ink); font-size: 13.5px; line-height: 1.45; }
.dev-bottom-doc-link.is-active { border-color: color-mix(in srgb, var(--dev-accent) 55%, var(--dev-line)); background: color-mix(in srgb, var(--dev-accent) 8%, var(--dev-surface)); }
.dev-bottom-doc-link.is-active > span, .dev-bottom-doc-link.is-active > strong { color: var(--dev-accent); }
.dev-article-foot { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--dev-line); display: flex; justify-content: space-between; align-items: end; gap: 24px; color: var(--dev-muted); font-size: 13px; }
.dev-article-foot strong { color: var(--dev-ink); }
.dev-article-foot p { margin: 4px 0 0; }
.dev-article-foot > a { color: var(--dev-accent); font-weight: 700; white-space: nowrap; }

.dev-toc { padding: 116px 24px 64px 18px; }
.dev-toc-sticky { position: sticky; top: 92px; }
.dev-toc h2 { margin: 0 0 12px; color: #98a2b3; font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.dev-toc nav { display: grid; gap: 2px; border-left: 1px solid var(--dev-line); }
.dev-toc nav a { padding: 6px 0 6px 13px; color: var(--dev-muted); font-size: 12.5px; line-height: 1.35; }
.dev-toc nav a:hover { color: var(--dev-accent); }
.dev-toc nav a.is-sub { padding-left: 24px; font-size: 12px; }
.dev-owner-note { display: grid; gap: 3px; margin-top: 30px; padding: 13px; border: 1px solid var(--dev-line); border-radius: 10px; background: var(--dev-soft); }
.dev-owner-note strong { color: var(--dev-ink); font-size: 12.5px; }
.dev-owner-note span { color: var(--dev-muted); font-size: 11px; line-height: 1.45; }
.dev-empty { color: var(--dev-muted); font-size: 13px; }
.dev-empty-main { padding: 90px 0; text-align: center; }

[data-theme="dark"] {
  --dev-ink: #f2f4f7;
  --dev-muted: #98a2b3;
  --dev-line: #2a3446;
  --dev-surface: #101828;
  --dev-soft: #182230;
}
[data-theme="dark"] .dev-prose { color: #cbd1dc; }
[data-theme="dark"] .dev-prose code { color: #fda29b; }

@media (max-width: 1160px) {
  .dev-shell { grid-template-columns: 250px minmax(0, 1fr); }
  .dev-toc { display: none; }
  .dev-main { padding-left: 48px; padding-right: 48px; }
}
@media (max-width: 780px) {
  .dev-topbar { height: auto; min-height: 60px; }
  .dev-topbar-inner { padding: 12px 16px; align-items: flex-start; }
  .dev-brand-section { display: none; }
  .dev-global-nav { gap: 14px; overflow-x: auto; white-space: nowrap; }
  .dev-global-nav a:nth-child(2) { display: none; }
  .dev-shell { display: block; }
  .dev-sidebar { border-right: 0; border-bottom: 1px solid var(--dev-line); padding: 18px 16px 10px; }
  .dev-search-wrap { margin-bottom: 12px; }
  #dev-doc-navigation { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 8px; }
  .dev-nav-group { display: contents; }
  .dev-nav-group h2 { display: none; }
  .dev-nav-item { flex: 0 0 auto; border: 1px solid var(--dev-line); white-space: nowrap; }
  .dev-main { padding: 28px 20px 72px; }
  .dev-breadcrumb { margin-bottom: 28px; }
  .dev-article-head h1 { font-size: 37px; }
  .dev-bottom-docs { margin-left: -4px; margin-right: -4px; padding: 17px 14px 10px; border-radius: 14px; }
  .dev-bottom-docs-head { align-items: flex-start; flex-direction: column; gap: 3px; }
  .dev-bottom-doc-link { flex-basis: min(235px, 82vw); }
  .dev-article-foot { align-items: flex-start; flex-direction: column; }
}