/* texas2step documentation site: tokens (shared with web/src/styles.css), layout, prose,
   code. Built into html/assets/docs.css by scripts/build_docs.py. No JavaScript. */

:root {
  color-scheme: light;
  --page: #f3f2ee;
  --surface: #fdfdfc;
  --surface-2: #f6f5f1;
  --ink: #0e1013;
  --ink-2: #4a4f57;
  --muted: #656a73;
  --border: rgba(14, 16, 19, 0.09);
  --shadow: 0 1px 2px rgba(20, 22, 30, 0.04), 0 12px 32px -16px rgba(20, 22, 40, 0.18);
  --link: #1d63b8;
  --code-bg: #f6f5f1;

  /* Syntax colours, checked for 4.5:1 against --code-bg and --surface. */
  --tok-comment: #656a73;
  --tok-keyword: #6a45d8;
  --tok-string: #0d7a4e;
  --tok-number: #b4470f;
  --tok-name: #1d5fae;
  --tok-var: #ad2a60;
  --tok-punct: #4a4f57;

  /* Brand: Texas sunset, decorative only */
  --sun-1: #f5a524;
  --sun-2: #e8467c;
  --sun-3: #7c5cff;
  --brand: linear-gradient(120deg, var(--sun-1), var(--sun-2) 55%, var(--sun-3));

  --radius: 18px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #090b0f;
    --surface: #121419;
    --surface-2: #0e1015;
    --ink: #eef0f3;
    --ink-2: #b4b9c2;
    --muted: #8f95a0;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 20px 40px -24px rgba(0, 0, 0, 0.8);
    --link: #72a9ef;
    --code-bg: #0c0e12;
    --tok-comment: #8f95a0;
    --tok-keyword: #ac98ff;
    --tok-string: #4fc895;
    --tok-number: #f0a066;
    --tok-name: #72a9ef;
    --tok-var: #f27aa6;
    --tok-punct: #b4b9c2;
  }
}

/* ---- Base -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}

:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 16px;
  top: 12px;
  z-index: 30;
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
}

/* ---- Top bar ----------------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--page) 84%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
}

.topbar::before {
  content: "";
  display: block;
  height: 3px;
  background: var(--brand);
}

.topbar-inner {
  max-width: 1240px;
  height: 60px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand .logo {
  width: 28px;
  height: 28px;
  flex: none;
}

.brand-tag {
  padding: 1px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.repo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.repo:hover {
  border-color: transparent;
  background: linear-gradient(var(--surface), var(--surface)) padding-box, var(--brand) border-box;
}

.repo .mark {
  width: 18px;
  height: 18px;
  flex: none;
}

.repo .narrow {
  display: none;
}

/* ---- Layout ------------------------------------------------------------------------ */

.layout {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 95px;
  max-height: calc(100vh - 115px);
  overflow-y: auto;
  font-size: 14.5px;
}

.sidebar ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar a {
  position: relative;
  display: block;
  padding: 6px 12px;
  border-radius: 10px;
  color: var(--ink-2);
  text-decoration: none;
}

.sidebar a:hover {
  background: var(--surface);
  color: var(--ink);
}

.sidebar a[aria-current="page"] {
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--ink);
  font-weight: 650;
}

.sidebar a[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 3px;
  background: var(--brand);
}

.sidebar .toc {
  margin: 6px 0 10px 14px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}

.sidebar .toc a {
  padding: 3px 10px;
  font-size: 13.5px;
  line-height: 1.45;
}

.sidebar .group {
  margin: 22px 12px 6px;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.doc {
  min-width: 0;
}

/* ---- Prose ------------------------------------------------------------------------- */

.prose {
  padding: 44px 56px 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow-wrap: break-word;
}

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

.prose > :last-child {
  margin-bottom: 0;
}

.prose :is(p, ul, ol, pre, blockquote, .table-wrap) {
  margin: 0 0 1.1em;
}

.prose :is(ul, ol) {
  padding-left: 1.4em;
}

.prose li + li {
  margin-top: 0.3em;
}

.prose li > :is(ul, ol) {
  margin: 0.3em 0 0;
}

.prose h1 {
  position: relative;
  margin: 0 0 26px;
  padding-bottom: 18px;
  font-size: 2.3rem;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.prose h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: var(--brand);
}

.prose h2 {
  margin: 2.3em 0 0.7em;
  padding-top: 1.1em;
  border-top: 1px solid var(--border);
  font-size: 1.5rem;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.prose h3 {
  margin: 1.8em 0 0.5em;
  font-size: 1.17rem;
  line-height: 1.3;
}

.prose :is(h4, h5, h6) {
  margin: 1.5em 0 0.4em;
  font-size: 1rem;
}

.prose .anchor {
  margin-left: 0.35em;
  color: var(--muted);
  font-weight: 500;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.15s;
}

.prose :is(h2, h3, h4, h5, h6):hover .anchor,
.prose .anchor:focus-visible {
  opacity: 1;
}

.prose a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose a:hover {
  text-decoration-thickness: 2px;
}

.prose strong {
  font-weight: 650;
}

.prose code {
  padding: 0.12em 0.38em;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-2);
  font-family: var(--mono);
  font-size: 0.86em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.prose pre {
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--code-bg);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}

.prose pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: inherit;
}

/* Tables fill the column and scroll inside their wrapper rather than widening the page. */
.prose .table-wrap {
  max-width: 100%;
  overflow-x: auto;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.prose td code {
  white-space: nowrap;
}

.prose :is(th, td) {
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--surface-2);
  font-weight: 650;
}

.prose img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.prose blockquote {
  padding: 2px 18px;
  border-left: 3px solid var(--sun-2);
  color: var(--ink-2);
}

.prose hr {
  margin: 2em 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.page-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 18px 8px 0;
  color: var(--ink-2);
  font-size: 13.5px;
}

.page-foot a {
  color: inherit;
  text-underline-offset: 3px;
}

/* ---- Code highlighting (Pygments short class names) -------------------------------- */

.prose pre :is(.c, .ch, .cm, .c1, .cs, .cpf) {
  color: var(--tok-comment);
  font-style: italic;
}

.prose pre :is(.k, .kc, .kd, .kn, .kp, .kr, .kt, .ow, .cp) {
  color: var(--tok-keyword);
}

.prose pre :is(.s, .sa, .sb, .sc, .dl, .sd, .s2, .se, .sh, .si, .sx, .sr, .s1, .ss) {
  color: var(--tok-string);
}

.prose pre :is(.m, .mb, .mf, .mh, .mi, .mo, .il) {
  color: var(--tok-number);
}

.prose pre :is(.nb, .bp, .nc, .nf, .fm, .nn, .ne) {
  color: var(--tok-name);
}

.prose pre :is(.nv, .vc, .vg, .vi, .vm, .na, .nt, .no, .nd, .nl) {
  color: var(--tok-var);
}

.prose pre :is(.o, .p) {
  color: var(--tok-punct);
}

.prose pre .gp {
  color: var(--tok-comment);
  user-select: none;
}

/* ---- Narrow screens: the navigation becomes chips above the page ------------------ */

@media (max-width: 860px) {
  html {
    scroll-padding-top: 76px;
  }

  .topbar-inner {
    height: 56px;
    padding: 0 16px;
  }

  .repo .wide {
    display: none;
  }

  .repo .narrow {
    display: inline;
  }

  .layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 16px 16px 48px;
  }

  .sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .sidebar ul.pages {
    display: contents;
  }

  .sidebar a {
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    font-size: 14px;
  }

  .sidebar a[aria-current="page"] {
    border-color: transparent;
    background: linear-gradient(var(--surface), var(--surface)) padding-box, var(--brand) border-box;
    box-shadow: none;
  }

  .sidebar a[aria-current="page"]::before,
  .sidebar .toc,
  .sidebar .group {
    display: none;
  }

  .prose {
    padding: 26px 20px 30px;
    border-radius: 14px;
  }

  .prose h1 {
    font-size: 1.85rem;
  }

  .prose h2 {
    font-size: 1.3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .prose .anchor {
    transition: none;
  }
}