/* Tsugi docs. The colours, fonts, header and footer are copied from the home page
   (public/index.html, which inlines its own CSS); keep the two in step. The layout follows
   Three columns: page list on the left, the page in the middle, "On this page" on the right. */

:root {
  color-scheme: light;
  --paper: #F8EBE6;
  --ink: #21110C;
  --ink-2: #6B5A54;
  --rule: #E2CFC8;
  --link: #B3381B;
  --footer-bg: #21110C;
  --footer-ink: #F8EBE6;
  --footer-ink-2: rgba(248, 235, 230, 0.72);
  --accent: #C43B20;
  --accent-ink: #F8EBE6;
  --surface: #FFF8F5;
  --tile: #F1E0D9;
  --r-panel: clamp(10px, 1.6vw, 20px);
  --font-display: "Archivo", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Instrument Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #1A120F;
    --ink: #F3E6E0;
    --ink-2: #B39C94;
    --rule: #3A2B26;
    --link: #F08A6C;
    --footer-bg: #0F0A08;
    --footer-ink: #F3E6E0;
    --footer-ink-2: rgba(243, 230, 224, 0.72);
    --accent: #F0623F;
    --accent-ink: #1A120F;
    --surface: #231916;
    --tile: #2E211C;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #1A120F;
  --ink: #F3E6E0;
  --ink-2: #B39C94;
  --rule: #3A2B26;
  --link: #F08A6C;
  --footer-bg: #0F0A08;
  --footer-ink: #F3E6E0;
  --footer-ink-2: rgba(243, 230, 224, 0.72);
  --accent: #F0623F;
  --accent-ink: #1A120F;
  --surface: #231916;
  --tile: #2E211C;
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, .wordmark { font-family: var(--font-display); }
code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}
a {
  color: var(--link);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.15em;
}
a:hover { text-decoration-thickness: 2.5px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.label {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  line-height: 1.5;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--ink-2);
}
.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 999px;
  z-index: 10;
}
.skip-link:focus { top: 0.75rem; }

.page {
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

/* Header, as on the home page */
.site-header {
  border-bottom: 1px solid var(--rule);
}
.site-header .page {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
}
.brand img {
  display: block;
  width: 32px;
  height: 32px;
  border-radius: 8px;
}
.wordmark {
  margin: 0;
  font-stretch: 80%;
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  line-height: 1;
}
.brand-sub {
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--ink-2);
}
.site-header nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}
.site-header nav a {
  color: var(--ink);
  font-weight: 500;
  text-decoration: none;
}
.site-header nav a:hover,
.site-header nav a[aria-current] { text-decoration: underline; }
.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.4;
  letter-spacing: 0.03em;
  padding: 0.25rem 0.6rem;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  border-radius: 999px;
  white-space: nowrap;
}

/* Three columns: pages, the page, on this page */
.docs-layout {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr) 14rem;
  gap: clamp(1.5rem, 3vw, 3rem);
  align-items: start;
}
.docs-layout.no-toc { grid-template-columns: 15rem minmax(0, 1fr); }
.docs-sidebar,
.docs-toc {
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow-y: auto;
  padding-block: 2rem;
  font-size: 0.95rem;
}
.docs-sidebar ul,
.docs-toc ul,
.docs-mobile ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-group + .nav-group { margin-top: 1.5rem; }
.nav-group li a,
.docs-toc li a {
  display: block;
  padding: 0.25rem 0;
  color: var(--ink-2);
  text-decoration: none;
  line-height: 1.4;
}
.nav-group li a:hover,
.docs-toc li a:hover { color: var(--ink); }
.nav-group li a[aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
}
.docs-toc ul ul { padding-left: 0.9rem; }
.docs-toc > ul {
  border-left: 1.5px solid var(--rule);
  padding-left: 0.9rem;
}

.docs-main {
  min-width: 0;
  padding-block: 2rem clamp(3rem, 7vw, 5rem);
}
.docs-mobile { display: none; }
.docs-mobile details {
  border: 1.5px solid var(--rule);
  border-radius: 12px;
  background: var(--surface);
  margin-bottom: 0.75rem;
}
.docs-mobile summary {
  cursor: pointer;
  padding: 0.6rem 1rem;
  font-weight: 600;
}
.docs-mobile details > div {
  padding: 0 1rem 0.9rem;
  font-size: 0.95rem;
}
.docs-mobile .docs-toc-mobile ul ul { padding-left: 0.9rem; }
.docs-mobile li a {
  display: block;
  padding: 0.3rem 0;
  color: var(--ink-2);
  text-decoration: none;
}
.docs-mobile li a[aria-current="page"] { color: var(--accent); font-weight: 600; }

@media (max-width: 1199px) {
  .docs-layout,
  .docs-layout.no-toc { grid-template-columns: 15rem minmax(0, 1fr); }
  .docs-toc { display: none; }
  .docs-mobile { display: block; }
  .docs-mobile .docs-menu { display: none; }
}
@media (max-width: 899px) {
  .docs-layout,
  .docs-layout.no-toc { grid-template-columns: minmax(0, 1fr); }
  .docs-sidebar { display: none; }
  .docs-main { padding-top: 1rem; }
  .docs-mobile .docs-menu { display: block; }
}
@media (max-width: 640px) {
  .site-header nav {
    flex-basis: 100%;
    gap: 1rem;
    font-size: 0.95rem;
  }
  .chip { display: none; }
}

/* The page itself */
.doc { max-width: 46rem; }
.doc h1 {
  margin: 0 0 1.25rem;
  font-stretch: 85%;
  font-weight: 800;
  font-size: clamp(2.1rem, 4.5vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.doc h2 {
  margin: 2.75rem 0 0.9rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-stretch: 90%;
  font-weight: 700;
  font-size: clamp(1.45rem, 2.6vw, 1.8rem);
  line-height: 1.15;
}
.doc h3 {
  margin: 2rem 0 0.6rem;
  font-stretch: 92%;
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.25;
}
.doc h4 { margin: 1.5rem 0 0.5rem; font-size: 1.05rem; }
.doc h2, .doc h3, .doc h4 { scroll-margin-top: 1rem; }
.doc .anchor {
  margin-left: 0.4rem;
  color: var(--ink-2);
  text-decoration: none;
  opacity: 0;
}
.doc h2:hover .anchor,
.doc h3:hover .anchor,
.doc h4:hover .anchor,
.doc .anchor:focus-visible { opacity: 1; }
.doc p { margin: 0 0 1rem; }
.doc ul, .doc ol { margin: 0 0 1rem; padding-left: 1.4rem; }
.doc li { margin: 0.3rem 0; }
.doc li > ul, .doc li > ol { margin: 0.3rem 0 0; }
.doc li::marker { color: var(--ink-2); }
.doc strong { font-weight: 600; }
.doc code {
  padding: 0.1em 0.35em;
  border-radius: 6px;
  background: var(--tile);
  overflow-wrap: anywhere;
}
.doc pre {
  margin: 0 0 1.25rem;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  background: var(--surface);
  border: 1.5px solid var(--rule);
  border-radius: 12px;
  line-height: 1.5;
}
.doc pre code {
  padding: 0;
  background: none;
  font-size: inherit;
  overflow-wrap: normal;
}
.doc blockquote {
  margin: 0 0 1rem;
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--ink-2);
}

/* Previous and next page */
.pager {
  max-width: 46rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: grid;
  gap: 0.15rem;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--rule);
  border-radius: 12px;
  background: var(--surface);
  text-decoration: none;
  font-weight: 600;
}
.pager a:hover { border-color: var(--accent); }
.pager .next { grid-column: 2; text-align: right; }
.pager span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-2);
}

/* Footer band, as on the home page */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-ink);
  border-top: 1px solid var(--rule);
  padding-block: clamp(2.5rem, 6vw, 4rem);
}
.site-footer .page {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}
.site-footer .wordmark { color: var(--footer-ink); }
.footer-note {
  margin: 0.4rem 0 0;
  color: var(--footer-ink-2);
  font-size: 0.95rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.95rem;
  color: var(--footer-ink-2);
}
.site-footer a { color: var(--footer-ink); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}