/*
  Sleipnir help — the app's Norse palette and chamfered slabs, but with a
  readable sans for body copy. The app is monospace everywhere because its
  panels are dense and label-driven; long-form prose is not, so mono is kept
  for headings, navigation, labels and code, where it carries the identity.
*/

:root {
  --c-void: #0b0c10;
  --c-panel: #14161b;
  --c-raise: #191c22;
  --c-edge: #3e434c;

  --c-gold: #d9a648;
  --c-ice: #8fc7d8;
  --c-blood: #c2454f;
  --c-moss: #8fae6e;

  --c-text: #d9dee3;
  --c-dim: #79818b;

  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code", monospace;
  --font-prose: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Helvetica, Arial, sans-serif;

  --head-h: 56px;
  --side-w: 240px;
  --toc-w: 210px;
  --measure: 74ch;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  /* Anchor targets must clear the sticky header. */
  scroll-padding-top: calc(var(--head-h) + 16px);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--c-void);
  color: var(--c-text);
  font-family: var(--font-prose);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--c-gold);
  color: var(--c-void);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-weight: 700;
}
.skip:focus {
  left: 8px;
  top: 8px;
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 2px;
}

/* ---------- header ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--head-h);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  background: rgba(11, 12, 16, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-edge);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  flex: none;
}
.brand img {
  height: 19px;
  display: block;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--c-gold);
}

.head-tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-wrap {
  position: relative;
  display: block;
}
#search {
  width: 210px;
  padding: 7px 11px;
  background: var(--c-panel);
  border: 1px solid var(--c-edge);
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 12.5px;
  clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}
#search::placeholder {
  color: var(--c-dim);
}
#search:focus {
  outline: none;
  border-color: var(--c-ice);
}

.ghlink,
.nav-toggle {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--c-dim);
  text-decoration: none;
  background: none;
  border: 0;
  cursor: pointer;
}
.ghlink:hover,
.nav-toggle:hover {
  color: var(--c-ice);
}
.nav-toggle {
  display: none;
}

/* ---------- search results ---------- */

.results {
  position: fixed;
  top: var(--head-h);
  right: 20px;
  z-index: 40;
  width: min(460px, calc(100vw - 40px));
  max-height: 70vh;
  overflow-y: auto;
  background: var(--c-panel);
  border: 1px solid var(--c-edge);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.6);
}
.results[hidden] {
  display: none;
}
.results a {
  display: block;
  padding: 11px 14px;
  border-bottom: 1px solid rgba(62, 67, 76, 0.5);
  text-decoration: none;
  color: var(--c-text);
}
.results a:last-child {
  border-bottom: 0;
}
.results a:hover,
.results a.active {
  background: var(--c-raise);
}
.results .r-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ice);
}
.results .r-ctx {
  font-size: 13px;
  color: var(--c-dim);
  line-height: 1.5;
}
.results .r-empty {
  padding: 14px;
  color: var(--c-dim);
  font-size: 14px;
}
.results mark {
  background: rgba(217, 166, 72, 0.28);
  color: var(--c-text);
  border-radius: 2px;
}

/* ---------- layout ---------- */

.shell {
  display: grid;
  grid-template-columns: var(--side-w) minmax(0, 1fr) var(--toc-w);
  gap: 40px;
  max-width: 1380px;
  margin: 0 auto;
  padding: 34px 24px 90px;
  align-items: start;
}

.sidenav {
  position: sticky;
  top: calc(var(--head-h) + 24px);
}
.sidenav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: nav;
}
.sidenav li {
  counter-increment: nav;
}
.sidenav a {
  display: block;
  padding: 7px 12px 7px 34px;
  position: relative;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
}
.sidenav a::before {
  content: counter(nav, decimal-leading-zero);
  position: absolute;
  left: 10px;
  color: var(--c-edge);
  font-size: 10.5px;
  font-weight: 700;
}
.sidenav a:hover {
  color: var(--c-text);
  background: var(--c-panel);
}
.sidenav a.current {
  color: var(--c-gold);
  border-left-color: var(--c-gold);
  background: var(--c-panel);
}
.sidenav a.current::before {
  color: var(--c-gold);
}

.toc {
  position: sticky;
  top: calc(var(--head-h) + 24px);
  font-size: 13px;
}
.toc-head {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--c-dim);
  margin: 0 0 10px;
}
.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--c-edge);
}
.toc a {
  display: block;
  padding: 4px 0 4px 12px;
  margin-left: -1px;
  border-left: 1px solid transparent;
  color: var(--c-dim);
  text-decoration: none;
  line-height: 1.45;
}
.toc a:hover {
  color: var(--c-text);
}
.toc a.active {
  color: var(--c-ice);
  border-left-color: var(--c-ice);
}
.toc-l3 a {
  padding-left: 24px;
  font-size: 12.5px;
}

/* ---------- prose ---------- */

.prose {
  max-width: var(--measure);
}

.prose > *:first-child {
  margin-top: 0;
}

.prose h1 {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.4px;
  margin: 0 0 8px;
  color: var(--c-text);
}
.prose h2 {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  margin: 52px 0 14px;
  padding-top: 18px;
  border-top: 1px solid var(--c-edge);
  color: var(--c-gold);
}
.prose h3 {
  font-family: var(--font-mono);
  font-size: 15.5px;
  font-weight: 700;
  margin: 32px 0 10px;
  color: var(--c-text);
}
.prose h4 {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin: 26px 0 8px;
  color: var(--c-dim);
}

.anchor {
  position: absolute;
  margin-left: -22px;
  width: 22px;
  color: var(--c-edge);
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.12s;
}
.prose h2,
.prose h3 {
  position: relative;
}
.prose h2:hover .anchor,
.prose h3:hover .anchor,
.anchor:focus {
  opacity: 1;
}

.prose p {
  margin: 0 0 16px;
}

.prose a {
  color: var(--c-ice);
  text-decoration-color: rgba(143, 199, 216, 0.4);
  text-underline-offset: 3px;
}
.prose a:hover {
  text-decoration-color: var(--c-ice);
}

.prose strong {
  color: #fff;
  font-weight: 650;
}

.prose ul,
.prose ol {
  margin: 0 0 16px;
  padding-left: 24px;
}
.prose li {
  margin-bottom: 7px;
}
.prose li::marker {
  color: var(--c-edge);
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.87em;
  background: var(--c-panel);
  border: 1px solid var(--c-edge);
  padding: 1px 5px;
  color: var(--c-gold);
  word-break: break-word;
}

.prose pre {
  background: var(--c-panel);
  border: 1px solid var(--c-edge);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 20px;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  color: var(--c-text);
  font-size: 13px;
  line-height: 1.65;
  word-break: normal;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--c-edge);
  margin: 40px 0;
}

.prose blockquote {
  margin: 0 0 20px;
  padding: 14px 18px;
  background: var(--c-panel);
  border-left: 2px solid var(--c-edge);
  color: var(--c-dim);
}
.prose blockquote p:last-child {
  margin-bottom: 0;
}

/* GitHub-style alerts, emitted by the build's blockquote renderer. */
.alert {
  margin: 0 0 20px;
  padding: 14px 18px;
  background: var(--c-panel);
  border-left: 3px solid var(--c-edge);
}
.alert p:last-child {
  margin-bottom: 0;
}
.alert-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.alert-note {
  border-left-color: var(--c-ice);
}
.alert-note .alert-label {
  color: var(--c-ice);
}
.alert-tip {
  border-left-color: var(--c-moss);
}
.alert-tip .alert-label {
  color: var(--c-moss);
}
.alert-warning {
  border-left-color: var(--c-gold);
}
.alert-warning .alert-label {
  color: var(--c-gold);
}
.alert-danger {
  border-left-color: var(--c-blood);
}
.alert-danger .alert-label {
  color: var(--c-blood);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 20px;
  font-size: 14.5px;
}
.prose thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--c-dim);
  border-bottom: 1px solid var(--c-edge);
  padding: 8px 12px 8px 0;
}
.prose tbody td {
  border-bottom: 1px solid rgba(62, 67, 76, 0.45);
  padding: 10px 12px 10px 0;
  vertical-align: top;
}
.prose tbody tr:last-child td {
  border-bottom: 0;
}

/* Wide content must scroll inside itself, never the page. */
.table-scroll {
  overflow-x: auto;
  margin: 0 0 20px;
}
.table-scroll table {
  margin: 0;
}

.prose figure {
  margin: 0 0 24px;
}
.prose figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--c-edge);
  background: var(--c-panel);
}
.prose figcaption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--c-dim);
  margin-top: 8px;
  line-height: 1.5;
}

.prose kbd {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--c-raise);
  border: 1px solid var(--c-edge);
  border-bottom-width: 2px;
  padding: 1px 6px;
  color: var(--c-text);
}

/* Landing-page card grid, used by index.md via raw HTML. */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}
.cards li {
  margin: 0;
}
.cards a {
  display: block;
  height: 100%;
  padding: 16px 18px;
  background: var(--c-panel);
  border: 1px solid var(--c-edge);
  text-decoration: none;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: border-color 0.12s, background 0.12s;
}
.cards a:hover {
  border-color: var(--c-ice);
  background: var(--c-raise);
}
.cards .c-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--c-ice);
  margin-bottom: 5px;
}
.cards .c-desc {
  display: block;
  font-size: 13.5px;
  color: var(--c-dim);
  line-height: 1.55;
}

/* ---------- pager + footer ---------- */

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 56px;
  max-width: var(--measure);
}
.pager a {
  display: block;
  padding: 14px 18px;
  background: var(--c-panel);
  border: 1px solid var(--c-edge);
  text-decoration: none;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.pager a:hover {
  border-color: var(--c-ice);
}
.pager-next {
  text-align: right;
}
.pager span {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--c-dim);
  margin-bottom: 3px;
}
.pager strong {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--c-ice);
}

.site-foot {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--c-edge);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--c-edge);
  max-width: var(--measure);
}
.site-foot a {
  color: var(--c-dim);
  text-decoration: none;
}
.site-foot a:hover {
  color: var(--c-ice);
}

/* ---------- responsive ---------- */

@media (max-width: 1180px) {
  .shell {
    grid-template-columns: var(--side-w) minmax(0, 1fr);
    gap: 34px;
  }
  .toc {
    display: none;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }
  .shell {
    grid-template-columns: minmax(0, 1fr);
    padding: 22px 18px 70px;
  }
  .sidenav {
    display: none;
    position: static;
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--c-edge);
  }
  .sidenav.open {
    display: block;
  }
  #search {
    width: 140px;
  }
  .brand-sub {
    display: none;
  }
  .prose h1 {
    font-size: 25px;
  }
  .pager {
    grid-template-columns: 1fr;
  }
}