/* edgepii site. One stylesheet, no framework.
   The tokens match demo/static/styles.css so the site and the app feel like one thing. */

:root {
  --bg: #05070d;
  --bg-soft: #0a0f1a;
  --panel: rgba(16, 22, 36, 0.72);
  --panel-solid: #0d1420;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e8edf7;
  --muted: #93a1bb;
  /* #727f9c clears WCAG AA 4.5:1 for body text on every surface here: 5.02 on
     the page, 4.60 on a panel, 4.77 on the soft panel. The previous #64718a
     measured 4.10 and 3.75, which failed for the 13px hints. */
  --faint: #727f9c;
  --accent: #5b8cff;
  --accent-2: #22d3ee;
  --secret: #ff5c8a;
  --gov: #ffb454;
  --payment: #b98cff;
  --contact: #35e0b6;
  --person: #5b8cff;
  --quasi: #8b98ad;
  --ok: #35e0b6;
  --warn: #ffb454;
  --radius: 16px;
  --radius-sm: 10px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --measure: 68ch;
  --head-h: 68px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--head-h) + 16px); }

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58rem 32rem at 12% -8%, rgba(91, 140, 255, 0.26), transparent 60%),
    radial-gradient(48rem 30rem at 92% 2%, rgba(34, 211, 238, 0.16), transparent 62%),
    radial-gradient(44rem 28rem at 60% 106%, rgba(185, 140, 255, 0.14), transparent 60%),
    var(--bg);
}

.sr {
  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: 50%;
  top: -60px;
  transform: translateX(-50%);
  z-index: 100;
  padding: 10px 18px;
  border-radius: 0 0 12px 12px;
  background: var(--accent);
  color: #04070f;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.16s ease;
}
.skip:focus { top: 0; }

a { color: var(--accent-2); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #7ee7f7; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 4px; }

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

.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: var(--head-h);
  padding: 10px clamp(16px, 3.4vw, 44px);
  background: rgba(5, 7, 13, 0.82);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); flex: 0 0 auto; }
.mark {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  /* The inline SVG carries the gradient and the tile. The radius here only
     softens the focus ring, so the two never disagree. */
  border-radius: 11px;
  overflow: hidden;
  line-height: 0;
  box-shadow: 0 8px 24px rgba(91, 140, 255, 0.34);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.mark svg { display: block; width: 100%; height: 100%; }
.brand:hover .mark { transform: translateY(-1px); box-shadow: 0 12px 28px rgba(91, 140, 255, 0.46); }
.mark span { opacity: 0.55; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 16px; letter-spacing: -0.015em; }
.brand-text small { color: var(--faint); font-size: 11.5px; }

.site-nav { display: flex; align-items: center; gap: 2px; margin-left: 8px; flex-wrap: wrap; }
.site-nav a {
  padding: 7px 11px;
  border-radius: 9px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.14s ease, background 0.14s ease;
}
.site-nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.site-nav a[aria-current="page"] { color: var(--text); background: rgba(91, 140, 255, 0.16); }

.head-meta { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 11.5px;
  font-family: var(--mono);
  white-space: nowrap;
}
.ghost-pill { text-decoration: none; }
.ghost-pill:hover { color: var(--text); border-color: var(--line-strong); }

.nav-toggle {
  display: none;
  margin-left: auto;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
}

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

.shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(22px, 4vw, 48px) clamp(16px, 3.4vw, 44px) 64px;
}
@media (min-width: 1120px) {
  .shell:has(.toc) { grid-template-columns: 220px minmax(0, 1fr); }
}
.main { min-width: 0; }

.toc {
  position: sticky;
  top: calc(var(--head-h) + 26px);
  align-self: start;
  max-height: calc(100vh - var(--head-h) - 60px);
  overflow-y: auto;
  font-size: 13px;
}
.toc-title {
  margin: 0 0 10px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.toc li { margin: 0; }
.toc a {
  display: block;
  padding: 5px 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.4;
}
.toc a:hover { color: var(--text); border-left-color: var(--line-strong); }
.toc .toc-l3 a { padding-left: 20px; font-size: 12.4px; color: var(--faint); }

/* ---------------------------------------------------------------- hero */

.hero { padding: clamp(10px, 2vw, 26px) 0 clamp(18px, 3vw, 34px); max-width: 900px; }
.hero h1 {
  margin: 12px 0 0;
  font-size: clamp(34px, 5.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.032em;
  font-weight: 700;
  background: linear-gradient(180deg, #ffffff 30%, #a9bad8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero.short h1 { font-size: clamp(28px, 3.8vw, 42px); }
.hero.short { padding-bottom: 4px; }

.eyebrow {
  display: inline-block;
  margin: 0;
  padding: 5px 12px;
  border: 1px solid rgba(91, 140, 255, 0.35);
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.1);
  color: #a9c2ff;
  font-size: 12px;
  font-weight: 500;
}

.lede {
  margin: 18px 0 0;
  max-width: 66ch;
  color: var(--muted);
  font-size: clamp(16px, 1.5vw, 18.5px);
  line-height: 1.62;
}
.lede strong { color: var(--text); font-weight: 600; }
.lede code { font-size: 0.92em; }

.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.14s ease, border-color 0.14s ease, background 0.14s ease;
}
.button:hover { transform: translateY(-1px); border-color: rgba(255, 255, 255, 0.3); color: var(--text); }
.button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #04070f;
  box-shadow: 0 12px 30px rgba(91, 140, 255, 0.28);
}
.button.primary:hover { color: #04070f; }
.button.quiet { background: transparent; border-color: transparent; color: var(--muted); }
.button.quiet:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }

.hero-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}
.hero-facts li { display: flex; flex-direction: column; gap: 2px; padding: 16px 18px; background: var(--panel-solid); }
.hero-facts strong { font-size: 24px; letter-spacing: -0.02em; }
.hero-facts span { color: var(--faint); font-size: 12.5px; }

/* ---------------------------------------------------------------- panels */

.panel-block {
  margin-top: 30px;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.panel-block > h2 { margin-top: 0; }
.block-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.block-head h2 { margin: 0; }
.hint { color: var(--faint); font-size: 13px; margin: 0; line-height: 1.55; }

/* `minmax(0, 1fr)` matters: without it the column cannot shrink below the
   min-content of a table inside it, and the whole page scrolls sideways on a
   phone. The table gets its own horizontal scroll instead. */
.split { display: grid; gap: 26px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 860px) { .split { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.label {
  margin: 0 0 8px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.label + .highlight, .label + .masked { margin-bottom: 20px; }

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 30px;
}
.value-card { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-solid); }
.value-card h3 { margin: 0 0 8px; font-size: 16px; letter-spacing: -0.01em; }
.value-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

/* ---------------------------------------------------------------- spans */

.highlight {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(4, 7, 15, 0.6);
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 2.1;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.m {
  padding: 2px 3px;
  border-radius: 5px;
  color: #f3f7ff;
  background: rgba(91, 140, 255, 0.2);
  border-bottom: 2px solid var(--person);
  cursor: help;
}
.m[data-class="secret"] { background: rgba(255, 92, 138, 0.18); border-bottom-color: var(--secret); }
.m[data-class="gov_id"] { background: rgba(255, 180, 84, 0.18); border-bottom-color: var(--gov); }
.m[data-class="payment"] { background: rgba(185, 140, 255, 0.2); border-bottom-color: var(--payment); }
.m[data-class="contact"] { background: rgba(53, 224, 182, 0.16); border-bottom-color: var(--contact); }
.m[data-class="person"] { background: rgba(91, 140, 255, 0.2); border-bottom-color: var(--person); }
.m[data-class="quasi"] { background: rgba(139, 152, 173, 0.18); border-bottom-color: var(--quasi); }

.masked {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(4, 7, 15, 0.6);
  color: #cfe0c8;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------------------------------------------------------------- tables */

.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); border: 1px solid var(--line); }
.docs-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 420px; }
.docs-table th, .docs-table td {
  padding: 9px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.docs-table thead th {
  position: sticky;
  top: 0;
  background: #0b1220;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}
.docs-table tbody tr:last-child td { border-bottom: 0; }
.docs-table tbody tr:hover { background: rgba(255, 255, 255, 0.025); }
.docs-table.compact td, .docs-table.compact th { padding: 7px 12px; }
.docs-table code { font-size: 12.5px; }

/* ---------------------------------------------------------------- code */

.code { margin: 18px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #070b14; overflow: hidden; }
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}
.code-lang { color: var(--faint); font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.code-copy {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 11.5px;
  cursor: pointer;
}
.code-copy:hover { color: var(--text); border-color: var(--line-strong); }
.code pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  tab-size: 4;
}
.code code { background: none; padding: 0; border: 0; }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  padding: 2px 5px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.07);
  color: #cfe3ff;
  overflow-wrap: break-word;
}
.code-sample { max-width: 100%; }

/* A diagram keeps its source visible until the drawing succeeds, so a reader
   with no CDN access still gets the structure. */
.diagram {
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #070b14;
  overflow: hidden;
}
.diagram-source {
  margin: 0;
  padding: 14px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}
.diagram.drawn .diagram-source { display: none; }
.diagram-drawn {
  padding: 20px 16px;
  display: flex;
  justify-content: center;
  overflow-x: auto;
}
.diagram-drawn svg { max-width: 100%; height: auto; }

/* ---------------------------------------------------------------- chips */

.type-chips {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.type-chips li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  font-size: 13px;
}
.type-chips small { margin-left: auto; color: var(--faint); font-size: 11.5px; }
.dot, .type-dot { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 auto; background: var(--person); }
.dot[data-class="secret"], .type-dot[data-class="secret"] { background: var(--secret); }
.dot[data-class="gov_id"], .type-dot[data-class="gov_id"] { background: var(--gov); }
.dot[data-class="payment"], .type-dot[data-class="payment"] { background: var(--payment); }
.dot[data-class="contact"], .type-dot[data-class="contact"] { background: var(--contact); }
.dot[data-class="person"], .type-dot[data-class="person"] { background: var(--person); }
.dot[data-class="quasi"], .type-dot[data-class="quasi"] { background: var(--quasi); }

/* ---------------------------------------------------------------- demo */

.demo { display: grid; gap: 18px; margin-top: 26px; align-items: start; }
@media (min-width: 1000px) { .demo { grid-template-columns: 300px minmax(0, 1fr); } }

.demo-side {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.demo-side .group { display: grid; gap: 9px; }
.demo-side h2 {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 600;
}

.lane-list { display: grid; gap: 6px; }
.lane {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  text-align: left;
  font-family: var(--sans);
  cursor: pointer;
}
.lane strong { font-size: 13.5px; font-weight: 600; }
.lane small { color: var(--faint); font-family: var(--mono); font-size: 11px; }
.lane:hover { border-color: var(--line-strong); }
.lane[aria-checked="true"] { border-color: rgba(91, 140, 255, 0.7); background: rgba(91, 140, 255, 0.14); }

.type-actions { display: flex; gap: 6px; }
.type-actions button {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 12px;
  cursor: pointer;
}
.type-actions button:hover { color: var(--text); border-color: var(--line-strong); }

.type-list { display: grid; gap: 3px; max-height: 260px; overflow-y: auto; padding-right: 4px; }
.type-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
}
.type-toggle:hover { background: rgba(255, 255, 255, 0.04); color: var(--text); }
.type-toggle input { accent-color: var(--accent); margin: 0; }

.floor-row { display: flex; align-items: center; gap: 12px; }
.floor-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.floor-row output { font-family: var(--mono); font-size: 12.5px; color: var(--accent-2); min-width: 44px; }

.example-list { display: grid; gap: 5px; max-height: 320px; overflow-y: auto; padding-right: 4px; }
.example-chip {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 11px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  text-align: left;
  font-family: var(--sans);
  cursor: pointer;
}
.example-chip strong { font-size: 12.8px; font-weight: 600; }
.example-chip small { color: var(--faint); font-size: 11.4px; line-height: 1.4; }
.example-chip:hover { border-color: var(--line-strong); }
.example-chip[aria-pressed="true"] { border-color: rgba(34, 211, 238, 0.6); background: rgba(34, 211, 238, 0.1); }

.demo-main {
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  min-width: 0;
}
.workbench-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.workbench-head h2 { margin: 0; font-size: 20px; letter-spacing: -0.015em; }
.counter { color: var(--faint); font-family: var(--mono); font-size: 11.5px; }
.example-why { margin: 8px 0 18px; color: var(--muted); font-size: 13.5px; line-height: 1.6; max-width: 68ch; }

.stats { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }
.stat {
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.03);
  font-size: 12px;
  color: var(--muted);
}
.stat strong { color: var(--text); font-family: var(--mono); }
.stat.ok { border-color: rgba(53, 224, 182, 0.4); color: #a9f0dd; }
.stat.bad { border-color: rgba(255, 92, 138, 0.45); color: #ffb9cb; }

.empty {
  margin: 16px 0 0;
  padding: 14px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 13.5px;
}

/* ---------------------------------------------------------------- tour */

.tour-grid { display: grid; gap: 20px; margin-top: 26px; }
.shot { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); overflow: hidden; }
.shot a { display: block; }
.shot img { display: block; width: 100%; height: auto; border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.shot figcaption { display: grid; gap: 4px; padding: 14px 18px; }
.shot figcaption strong { font-size: 14.5px; }
.shot figcaption span { color: var(--muted); font-size: 13.5px; line-height: 1.55; }

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

.prose { max-width: var(--measure); }
.prose h1 { font-size: clamp(28px, 3.6vw, 40px); letter-spacing: -0.03em; margin: 0 0 12px; line-height: 1.14; }
.prose h2 {
  margin: 44px 0 12px;
  font-size: 23px;
  letter-spacing: -0.02em;
  line-height: 1.25;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}
.prose h3 { margin: 28px 0 8px; font-size: 17.5px; letter-spacing: -0.01em; }
.prose h4 { margin: 22px 0 6px; font-size: 15.5px; color: var(--muted); }
.prose p { margin: 0 0 15px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin: 0 0 7px; }
.prose li > ul { margin-top: 7px; }
.prose hr { margin: 34px 0; border: 0; border-top: 1px solid var(--line); }
.prose blockquote {
  margin: 18px 0;
  padding: 12px 18px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(91, 140, 255, 0.08);
  color: var(--muted);
}
.prose blockquote p { margin: 0; }
.prose img { max-width: 100%; height: auto; border-radius: var(--radius-sm); border: 1px solid var(--line); }

.callout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  margin: 18px 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-2);
  border-radius: var(--radius-sm);
  background: rgba(34, 211, 238, 0.07);
}
.callout-kind {
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-top: 2px;
}
.callout-body { font-size: 14px; line-height: 1.6; }
.callout-warning, .callout-caution { border-left-color: var(--warn); background: rgba(255, 180, 84, 0.07); }
.callout-warning .callout-kind, .callout-caution .callout-kind { color: var(--warn); }
.callout-important { border-left-color: var(--secret); background: rgba(255, 92, 138, 0.07); }
.callout-important .callout-kind { color: var(--secret); }
.callout-block { border-left: 3px solid var(--accent); }

.prose .table-wrap { margin: 16px 0 20px; }

.page-nav {
  display: grid;
  gap: 12px;
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
@media (min-width: 720px) { .page-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.page-nav-link {
  display: grid;
  gap: 3px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 14.5px;
}
.page-nav-link span { color: var(--faint); font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.page-nav-link:hover { border-color: var(--line-strong); color: var(--text); }
.page-nav-link.next { text-align: right; }

/* ---------------------------------------------------------------- footer */

.site-foot {
  margin-top: 40px;
  padding: 32px clamp(16px, 3.4vw, 44px) 44px;
  border-top: 1px solid var(--line);
  background: rgba(5, 7, 13, 0.7);
}
.foot-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  max-width: 1240px;
  margin: 0 auto;
}
.foot-grid strong { font-size: 15px; }
.foot-grid p { margin: 6px 0 0; color: var(--faint); font-size: 13px; max-width: 44ch; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-foot nav a { color: var(--muted); font-size: 13.5px; text-decoration: none; }
.site-foot nav a:hover { color: var(--text); }
.foot-note {
  max-width: 1240px;
  margin: 24px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12.5px;
}

/* ---------------------------------------------------------------- mobile */

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .head-meta { display: none; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin: 0;
    padding: 10px clamp(16px, 3.4vw, 44px) 16px;
    background: rgba(7, 11, 20, 0.98);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 11px 14px; font-size: 15px; }
  .brand-text small { display: none; }
  .hero h1 { font-size: clamp(30px, 8.4vw, 42px); }
  .hero-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toc { display: none; }
}

@media print {
  .site-head, .site-foot, .toc, .page-nav, .aurora, .code-copy, .nav-toggle { display: none !important; }
  body { background: #fff; color: #111; }
  .prose { max-width: none; }
  .code, .docs-table { border-color: #ccc; }
}

/* ---------------------------------------------------------------- author */

.author-page { max-width: 980px; }
.author-section { display: grid; gap: 30px; margin-top: 8px; }

.author-card {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 24px;
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
@media (max-width: 640px) {
  .author-card { grid-template-columns: 1fr; gap: 18px; }
}
.portrait {
  width: 128px; height: 128px;
  border-radius: 18px;
  border: 1px solid var(--line-strong);
  object-fit: cover;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}
.author-body .eyebrow { margin-bottom: 10px; }
.author-body h2 {
  margin: 0 0 6px;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.025em;
  line-height: 1.15;
  border: 0;
  padding: 0;
}
.author-meta { margin: 0 0 14px; color: var(--faint); font-size: 13px; }
.author-body p { margin: 0 0 13px; color: var(--muted); font-size: 15px; line-height: 1.65; }
.author-body p strong { color: var(--text); }

.author-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 0 !important; }
.author-links .btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.14s ease, border-color 0.14s ease, background 0.14s ease;
}
.author-links .btn:hover { transform: translateY(-1px); border-color: rgba(255, 255, 255, 0.3); color: var(--text); }
.author-links .btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #04070f;
  box-shadow: 0 10px 26px rgba(91, 140, 255, 0.28);
}
.author-links .btn.primary:hover { color: #04070f; }

.author-grid { display: grid; gap: 16px; }
@media (min-width: 860px) { .author-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.author-panel {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-solid);
}
.author-panel h3 { margin: 0 0 8px; font-size: 16px; letter-spacing: -0.01em; }
.author-panel p { margin: 0 0 10px; color: var(--muted); font-size: 14px; line-height: 1.6; }
.author-panel .source { margin: 0; color: var(--faint); font-size: 12px; }
.book-panel { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 18px; align-items: start; }
.book-panel img {
  width: 120px; height: auto;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  display: block;
}
@media (max-width: 520px) { .book-panel { grid-template-columns: 1fr; } }

.author-projects-title {
  margin: 6px 0 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 600;
}
.project-grid { display: grid; gap: 16px; }
@media (min-width: 760px) { .project-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.project {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-solid);
}
.project-media { display: block; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.project-media img { display: block; width: 100%; height: auto; }
.project h3 { margin: 0; font-size: 15.5px; letter-spacing: -0.01em; }
.project h3 a { color: var(--text); text-decoration: none; }
.project h3 a:hover { color: var(--accent-2); }
.project p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }

.cta-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px clamp(18px, 2.6vw, 28px);
  border: 1px solid rgba(91, 140, 255, 0.34);
  border-radius: var(--radius);
  background:
    radial-gradient(30rem 14rem at 8% 0%, rgba(91, 140, 255, 0.16), transparent 70%),
    var(--panel-solid);
}
.cta-band p { margin: 0; color: var(--text); font-size: 16px; }
.cta-band a.btn {
  display: inline-flex;
  padding: 11px 20px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04070f;
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 12px 30px rgba(91, 140, 255, 0.28);
  transition: transform 0.14s ease;
}
.cta-band a.btn:hover { transform: translateY(-1px); color: #04070f; }

/* A short author strip at the end of the home page. The face and the call to
   action sit one scroll from the hero, without a full about page in the way. */
.author-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 30px;
  padding: 20px clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-solid);
}
.author-strip img {
  width: 72px; height: 72px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  object-fit: cover;
  flex: 0 0 auto;
}
.author-strip > div:nth-child(2) { flex: 1 1 260px; min-width: 0; }
.author-strip-name { margin: 0 0 4px; font-size: 15px; }
.author-strip-name strong { color: var(--text); }
.author-strip-meta { margin: 0; color: var(--faint); font-size: 13px; line-height: 1.55; }
.author-strip-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.author-strip-actions .btn {
  padding: 9px 15px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.author-strip-actions .btn:hover { border-color: rgba(255, 255, 255, 0.3); color: var(--text); }
.author-strip-actions .btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #04070f;
}
.author-strip-actions .btn.primary:hover { color: #04070f; }

pre { line-height: 125%; }
td.linenos .normal { color: #6e7681; background-color: #0d1117; padding-left: 5px; padding-right: 5px; }
span.linenos { color: #6e7681; background-color: #0d1117; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #e6edf3; background-color: #6e7681; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #e6edf3; background-color: #6e7681; padding-left: 5px; padding-right: 5px; }
.code pre .hll { background-color: #6e7681 }
.code pre { background: #0d1117; color: #E6EDF3 }
.code pre .c { color: #8B949E; font-style: italic } /* Comment */
.code pre .err { color: #F85149 } /* Error */
.code pre .esc { color: #E6EDF3 } /* Escape */
.code pre .g { color: #E6EDF3 } /* Generic */
.code pre .k { color: #FF7B72 } /* Keyword */
.code pre .l { color: #A5D6FF } /* Literal */
.code pre .n { color: #E6EDF3 } /* Name */
.code pre .o { color: #FF7B72; font-weight: bold } /* Operator */
.code pre .x { color: #E6EDF3 } /* Other */
.code pre .p { color: #E6EDF3 } /* Punctuation */
.code pre .ch { color: #8B949E; font-style: italic } /* Comment.Hashbang */
.code pre .cm { color: #8B949E; font-style: italic } /* Comment.Multiline */
.code pre .cp { color: #8B949E; font-weight: bold; font-style: italic } /* Comment.Preproc */
.code pre .cpf { color: #8B949E; font-style: italic } /* Comment.PreprocFile */
.code pre .c1 { color: #8B949E; font-style: italic } /* Comment.Single */
.code pre .cs { color: #8B949E; font-weight: bold; font-style: italic } /* Comment.Special */
.code pre .gd { color: #FFA198; background-color: #490202 } /* Generic.Deleted */
.code pre .ge { color: #E6EDF3; font-style: italic } /* Generic.Emph */
.code pre .ges { color: #E6EDF3; font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.code pre .gr { color: #FFA198 } /* Generic.Error */
.code pre .gh { color: #79C0FF; font-weight: bold } /* Generic.Heading */
.code pre .gi { color: #56D364; background-color: #0F5323 } /* Generic.Inserted */
.code pre .go { color: #8B949E } /* Generic.Output */
.code pre .gp { color: #8B949E } /* Generic.Prompt */
.code pre .gs { color: #E6EDF3; font-weight: bold } /* Generic.Strong */
.code pre .gu { color: #79C0FF } /* Generic.Subheading */
.code pre .gt { color: #FF7B72 } /* Generic.Traceback */
.code pre .g-Underline { color: #E6EDF3; text-decoration: underline } /* Generic.Underline */
.code pre .kc { color: #79C0FF } /* Keyword.Constant */
.code pre .kd { color: #FF7B72 } /* Keyword.Declaration */
.code pre .kn { color: #FF7B72 } /* Keyword.Namespace */
.code pre .kp { color: #79C0FF } /* Keyword.Pseudo */
.code pre .kr { color: #FF7B72 } /* Keyword.Reserved */
.code pre .kt { color: #FF7B72 } /* Keyword.Type */
.code pre .ld { color: #79C0FF } /* Literal.Date */
.code pre .m { color: #A5D6FF } /* Literal.Number */
.code pre .s { color: #A5D6FF } /* Literal.String */
.code pre .na { color: #E6EDF3 } /* Name.Attribute */
.code pre .nb { color: #E6EDF3 } /* Name.Builtin */
.code pre .nc { color: #F0883E; font-weight: bold } /* Name.Class */
.code pre .no { color: #79C0FF; font-weight: bold } /* Name.Constant */
.code pre .nd { color: #D2A8FF; font-weight: bold } /* Name.Decorator */
.code pre .ni { color: #FFA657 } /* Name.Entity */
.code pre .ne { color: #F0883E; font-weight: bold } /* Name.Exception */
.code pre .nf { color: #D2A8FF; font-weight: bold } /* Name.Function */
.code pre .nl { color: #79C0FF; font-weight: bold } /* Name.Label */
.code pre .nn { color: #FF7B72 } /* Name.Namespace */
.code pre .nx { color: #E6EDF3 } /* Name.Other */
.code pre .py { color: #79C0FF } /* Name.Property */
.code pre .nt { color: #7EE787 } /* Name.Tag */
.code pre .nv { color: #79C0FF } /* Name.Variable */
.code pre .ow { color: #FF7B72; font-weight: bold } /* Operator.Word */
.code pre .pm { color: #E6EDF3 } /* Punctuation.Marker */
.code pre .w { color: #6E7681 } /* Text.Whitespace */
.code pre .mb { color: #A5D6FF } /* Literal.Number.Bin */
.code pre .mf { color: #A5D6FF } /* Literal.Number.Float */
.code pre .mh { color: #A5D6FF } /* Literal.Number.Hex */
.code pre .mi { color: #A5D6FF } /* Literal.Number.Integer */
.code pre .mo { color: #A5D6FF } /* Literal.Number.Oct */
.code pre .sa { color: #79C0FF } /* Literal.String.Affix */
.code pre .sb { color: #A5D6FF } /* Literal.String.Backtick */
.code pre .sc { color: #A5D6FF } /* Literal.String.Char */
.code pre .dl { color: #79C0FF } /* Literal.String.Delimiter */
.code pre .sd { color: #A5D6FF } /* Literal.String.Doc */
.code pre .s2 { color: #A5D6FF } /* Literal.String.Double */
.code pre .se { color: #79C0FF } /* Literal.String.Escape */
.code pre .sh { color: #79C0FF } /* Literal.String.Heredoc */
.code pre .si { color: #A5D6FF } /* Literal.String.Interpol */
.code pre .sx { color: #A5D6FF } /* Literal.String.Other */
.code pre .sr { color: #79C0FF } /* Literal.String.Regex */
.code pre .s1 { color: #A5D6FF } /* Literal.String.Single */
.code pre .ss { color: #A5D6FF } /* Literal.String.Symbol */
.code pre .bp { color: #E6EDF3 } /* Name.Builtin.Pseudo */
.code pre .fm { color: #D2A8FF; font-weight: bold } /* Name.Function.Magic */
.code pre .vc { color: #79C0FF } /* Name.Variable.Class */
.code pre .vg { color: #79C0FF } /* Name.Variable.Global */
.code pre .vi { color: #79C0FF } /* Name.Variable.Instance */
.code pre .vm { color: #79C0FF } /* Name.Variable.Magic */
.code pre .il { color: #A5D6FF } /* Literal.Number.Integer.Long */