:root {
  color-scheme: light;
  --bg: #fbfaf8;
  --panel: #ffffff;
  --panel-soft: #f3f1ec;
  --text: #191b22;
  --muted: #686b75;
  --border: #e2dfd8;
  --accent: #e4512f;
  --accent-soft: #fff0ea;
  --accent-strong: #a72d17;
  --code-bg: #11131a;
  --code-panel: #191c26;
  --code-text: #e8eaf0;
  --shadow: 0 18px 50px rgba(31, 28, 23, .08);
  --header-height: 64px;
  --notice-height: 34px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101116;
  --panel: #17191f;
  --panel-soft: #1f222a;
  --text: #f2f0eb;
  --muted: #a6a8b1;
  --border: #2e313b;
  --accent: #ff7957;
  --accent-soft: #321d19;
  --accent-strong: #ff9a80;
  --shadow: 0 18px 50px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 120px; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.72; }
a { color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 3px; }
button, input { font: inherit; }

.site-header { position: fixed; z-index: 50; inset: 0 0 auto 0; height: var(--header-height); display: grid; grid-template-columns: 280px 1fr auto; align-items: center; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(18px); padding: 0 24px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--text); text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand-mark { width: 30px; height: 30px; display: block; border-radius: 9px; object-fit: cover; }
.brand-section { color: var(--muted); font-weight: 550; padding-left: 8px; border-left: 1px solid var(--border); }
.brand-version { color: var(--muted); font: 650 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0; }
.top-nav { display: flex; align-items: center; gap: 26px; }
.top-nav a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 650; }
.top-nav a:hover, .top-nav a.is-active { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.search-trigger, .theme-toggle, .menu-toggle { border: 1px solid var(--border); background: var(--panel); color: var(--muted); border-radius: 10px; min-height: 38px; cursor: pointer; }
.search-trigger { min-width: 220px; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 0 10px 0 13px; text-align: left; font-size: 13px; }
kbd { border: 1px solid var(--border); background: var(--panel-soft); border-radius: 5px; padding: 1px 6px; font-size: 11px; }
.theme-toggle { width: 38px; }
.menu-toggle { display: none; padding: 0 12px; }

.pre-release { position: fixed; z-index: 45; top: var(--header-height); left: 0; right: 0; height: var(--notice-height); display: flex; align-items: center; justify-content: center; gap: 8px; background: #191b22; color: #dfe1e7; font-size: 12px; letter-spacing: .01em; }
.pre-release span { color: #ff9477; font-weight: 800; text-transform: uppercase; font-size: 10px; letter-spacing: .09em; }

.book-shell { padding-top: calc(var(--header-height) + var(--notice-height)); }
.sidebar { position: fixed; z-index: 30; top: calc(var(--header-height) + var(--notice-height)); bottom: 0; left: 0; width: 280px; overflow-y: auto; border-right: 1px solid var(--border); padding: 28px 22px 32px; background: var(--bg); }
.sidebar-title { font-size: 11px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin: 0 10px 22px; }
.sidebar-group { margin-bottom: 24px; }
.sidebar-group h2 { margin: 0 10px 7px; color: var(--muted); text-transform: uppercase; letter-spacing: .09em; font-size: 10px; font-weight: 800; }
.sidebar-link { display: block; padding: 6px 10px; border-radius: 7px; color: var(--muted); text-decoration: none; font-size: 13px; line-height: 1.35; }
.sidebar-link:hover { color: var(--text); background: var(--panel-soft); }
.sidebar-link.is-active { color: var(--accent-strong); background: var(--accent-soft); font-weight: 720; }
.sidebar-attribution { margin: 34px 10px 0; padding-top: 18px; border-top: 1px solid var(--border); }
.organization-lockup { display: inline-flex; align-items: center; gap: 9px; color: var(--muted); text-decoration: none; font-size: 12px; line-height: 1.2; }
.organization-lockup:hover { color: var(--text); }
.organization-lockup img { flex: 0 0 auto; border-radius: 50%; border: 1px solid var(--border); object-fit: cover; background: #050505; }
.organization-lockup strong { color: inherit; font-weight: 720; }
.organization-lockup-wrap { margin: 4px 0 30px; }

.content-shell { margin-left: 280px; display: grid; grid-template-columns: minmax(0, 860px) 220px; justify-content: center; gap: 70px; padding: 62px 52px 90px; }
.article { min-width: 0; }
.article-kicker { color: var(--accent); font-weight: 800; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px; }
.article h1 { font-size: clamp(38px, 5vw, 58px); line-height: 1.04; letter-spacing: -.045em; margin: 0 0 28px; max-width: 760px; }
.article h2 { margin: 64px 0 18px; font-size: 28px; line-height: 1.2; letter-spacing: -.025em; border-top: 1px solid var(--border); padding-top: 28px; }
.article h3 { margin: 38px 0 13px; font-size: 20px; line-height: 1.3; letter-spacing: -.015em; }
.article h4 { margin: 28px 0 10px; font-size: 16px; }
.heading-anchor { opacity: 0; margin-left: 8px; text-decoration: none; font-weight: 500; }
.article h2:hover .heading-anchor, .article h3:hover .heading-anchor { opacity: .55; }
.article p { margin: 0 0 20px; max-width: 790px; }
.article > p:first-of-type { font-size: 19px; color: var(--muted); line-height: 1.65; }
.article ul, .article ol { margin: 0 0 24px; padding-left: 24px; }
.article li { margin: 7px 0; padding-left: 5px; }
.article code:not(pre code) { background: var(--panel-soft); border: 1px solid var(--border); border-radius: 5px; padding: .12em .35em; font-family: "SFMono-Regular", Consolas, monospace; font-size: .86em; color: var(--accent-strong); overflow-wrap: anywhere; word-break: break-word; }
.markdown-image { display: block; width: 128px; height: 128px; object-fit: cover; border-radius: 24px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.article h1 .markdown-image { display: inline-block; width: 32px; height: 32px; margin: 0 11px 0 0; border: 0; border-radius: 8px; box-shadow: none; vertical-align: .04em; }
.article blockquote { margin: 28px 0; padding: 18px 22px; border-left: 3px solid var(--accent); background: var(--panel); box-shadow: var(--shadow); border-radius: 0 10px 10px 0; }
.article blockquote p { margin: 0; }
.callout { border: 1px solid var(--border); border-left: 4px solid #6476e8; background: var(--panel); padding: 18px 20px; margin: 28px 0; border-radius: 9px; }
.callout-important, .callout-warning, .callout-danger { border-left-color: var(--accent); background: var(--accent-soft); }
.callout-label { font-size: 10px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 5px; }
.callout p { margin: 0; }
.table-wrap { overflow-x: auto; margin: 26px 0 32px; border: 1px solid var(--border); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; background: var(--panel); font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--border); }
th { background: var(--panel-soft); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; }
tr:last-child td { border-bottom: 0; }
hr { border: 0; border-top: 1px solid var(--border); margin: 46px 0; }

.roadmap-principles { margin: 38px 0 46px; padding: 4px 26px 24px; border: 1px solid var(--border); border-radius: 16px; background: linear-gradient(145deg, var(--panel), var(--panel-soft)); box-shadow: var(--shadow); }
.roadmap-principles h2 { margin-top: 0; border-top: 0; }
.roadmap-principles ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 28px; padding-left: 22px; margin-bottom: 0; }
.roadmap-principles li { margin: 0; }
.roadmap-overview { position: relative; display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; margin: 38px 0 42px; padding-top: 18px; }
.roadmap-overview::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 25%, var(--border))); }
.roadmap-overview-card { min-width: 0; padding: 13px 10px 12px; border: 1px solid var(--border); border-radius: 11px; background: var(--panel); color: var(--text); text-decoration: none; transition: transform .16s ease, border-color .16s ease, background .16s ease; }
.roadmap-overview-card:hover { transform: translateY(-3px); border-color: var(--accent); background: var(--accent-soft); }
.roadmap-overview-card span { display: block; color: var(--accent); font-size: 11px; font-weight: 850; letter-spacing: .08em; }
.roadmap-overview-card strong { display: block; margin-top: 6px; color: var(--text); font-size: 11px; line-height: 1.25; }
.roadmap-stage { position: relative; display: grid; grid-template-columns: 66px minmax(0, 1fr); gap: 22px; margin: 22px 0; padding: 28px 30px 30px 24px; border: 1px solid var(--border); border-radius: 17px; background: var(--panel); box-shadow: var(--shadow); overflow: hidden; }
.roadmap-stage::after { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--accent); }
.roadmap-marker { position: relative; z-index: 1; width: 58px; height: 58px; display: grid; place-items: center; border-radius: 16px; background: var(--code-bg); color: #ffffff; box-shadow: 0 10px 24px rgba(0, 0, 0, .18); }
.roadmap-marker span { font: 850 15px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .04em; }
.roadmap-stage-content h2 { margin: 2px 0 16px; padding: 0; border: 0; font-size: 25px; }
.roadmap-stage-content h3 { margin-top: 30px; }
.roadmap-goal { display: grid; grid-template-columns: 68px minmax(0, 1fr); gap: 12px; margin: 0 0 22px; padding: 13px 15px; border-radius: 10px; background: var(--panel-soft); }
.roadmap-goal > span, .roadmap-exit > span { color: var(--accent); font-size: 10px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.roadmap-goal p, .roadmap-exit p { margin: 0; font-size: 14px; }
.roadmap-exit { margin-top: 28px; padding: 17px 18px; border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border)); border-radius: 11px; background: var(--accent-soft); }
.roadmap-exit > span { display: block; margin-bottom: 5px; }

.code-block { margin: 26px 0 32px; border: 1px solid #292d39; border-radius: 12px; overflow: hidden; background: var(--code-bg); box-shadow: 0 18px 35px rgba(0, 0, 0, .16); }
.code-toolbar { height: 42px; display: flex; align-items: center; justify-content: space-between; padding: 0 12px 0 15px; background: var(--code-panel); border-bottom: 1px solid #292d39; color: #9ca2b2; font: 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.code-file { display: inline-flex; align-items: center; gap: 8px; }
.jeth-dot { width: 8px; height: 8px; border-radius: 2px; background: #ff6e4a; box-shadow: 0 0 0 3px rgba(255, 110, 74, .12); }
.copy-code { border: 0; background: transparent; color: #9ca2b2; cursor: pointer; font: inherit; }
.copy-code:hover { color: #ffffff; }
pre { margin: 0; overflow-x: auto; padding: 21px 23px 24px; background: var(--code-bg); color: var(--code-text); font: 13.5px/1.7 "SFMono-Regular", Consolas, "Liberation Mono", monospace; tab-size: 2; }
.tok-comment { color: #747b8e; font-style: italic; }
.tok-keyword { color: #d99cff; }
.tok-type { color: #68d8c7; }
.tok-builtin { color: #76b7ff; }
.tok-string { color: #f4be79; }
.tok-number { color: #a5df86; }
.tok-decorator { color: #ff9c66; }
.tok-private { color: #ff79a9; }
.tok-operator { color: #c6cad5; }

.page-toc { position: sticky; top: 130px; align-self: start; max-height: calc(100vh - 160px); overflow-y: auto; padding-left: 18px; border-left: 1px solid var(--border); }
.toc-title { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 10px; }
.toc-link { display: block; color: var(--muted); text-decoration: none; font-size: 12px; line-height: 1.45; padding: 4px 0; }
.toc-link:hover { color: var(--text); }
.toc-link.depth-3 { padding-left: 12px; }
.article-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 72px; padding: 20px 0; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }
.article-footer a { color: var(--muted); text-decoration: none; }
.pagination { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.pagination-link { display: flex; flex-direction: column; padding: 16px 18px; border: 1px solid var(--border); border-radius: 10px; background: var(--panel); text-decoration: none; }
.pagination-link.next { text-align: right; align-items: flex-end; }
.pagination-link span { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .07em; }
.pagination-link strong { color: var(--text); font-size: 14px; }
.pagination-link:hover { border-color: var(--accent); }

.search-modal[hidden] { display: none; }
.search-modal { position: fixed; z-index: 100; inset: 0; display: grid; place-items: start center; padding-top: 12vh; }
.search-backdrop { position: absolute; inset: 0; border: 0; background: rgba(10, 11, 15, .62); backdrop-filter: blur(5px); }
.search-panel { position: relative; width: min(680px, calc(100vw - 30px)); max-height: 72vh; overflow: hidden; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 30px 100px rgba(0, 0, 0, .35); }
.search-box { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.search-input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 16px; }
.search-close { border: 1px solid var(--border); border-radius: 6px; background: var(--panel-soft); color: var(--muted); cursor: pointer; font-size: 11px; }
.search-results { max-height: calc(72vh - 60px); overflow-y: auto; padding: 8px; }
.search-result { display: block; padding: 12px 14px; border-radius: 8px; text-decoration: none; }
.search-result:hover, .search-result.is-selected { background: var(--panel-soft); }
.search-result strong { display: block; color: var(--text); }
.search-result em.search-section { display: block; color: var(--accent); font-size: 11px; font-style: normal; margin-top: 1px; }
.search-result span { display: block; color: var(--muted); font-size: 12px; margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-empty { padding: 28px 18px; text-align: center; color: var(--muted); font-size: 13px; }

@media (max-width: 1180px) {
  .content-shell { grid-template-columns: minmax(0, 820px); }
  .page-toc { display: none; }
}

@media (max-width: 860px) {
  .site-header { grid-template-columns: 1fr auto; padding: 0 15px; }
  .top-nav, .search-trigger span, .search-trigger kbd { display: none; }
  .search-trigger { min-width: 38px; width: 38px; padding: 0; justify-content: center; }
  .search-trigger::after { content: "⌕"; font-size: 18px; }
  .menu-toggle { display: block; }
  .sidebar { transform: translateX(-100%); transition: transform .22s ease; box-shadow: var(--shadow); }
  body.nav-open .sidebar { transform: translateX(0); }
  .content-shell { margin-left: 0; padding: 48px 24px 72px; }
  .article h1 { font-size: 40px; }
  .roadmap-overview { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .roadmap-overview::before { display: none; }
}

@media (max-width: 560px) {
  .brand-section, .brand-version { display: none; }
  .pre-release { justify-content: flex-start; padding: 0 15px; overflow: hidden; white-space: nowrap; }
  .content-shell { padding: 40px 18px 60px; }
  .article h1 { font-size: 35px; }
  .article h2 { font-size: 24px; margin-top: 52px; }
  .roadmap-principles { padding: 2px 18px 20px; }
  .roadmap-principles ol { grid-template-columns: 1fr; }
  .roadmap-overview { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .roadmap-stage { grid-template-columns: 1fr; gap: 17px; padding: 23px 19px 24px; }
  .roadmap-marker { width: 48px; height: 48px; border-radius: 13px; }
  .roadmap-stage-content h2 { margin-top: 0; font-size: 23px; }
  .roadmap-goal { grid-template-columns: 1fr; gap: 4px; }
  pre { font-size: 12px; padding: 18px 16px 20px; }
  .pagination { grid-template-columns: 1fr; }
  .article-footer { align-items: flex-start; flex-direction: column; gap: 5px; }
}