/* Sepulchre public site — "Landing B".
 *
 * Built on the Industry design system (ds/industry.css: tokens, .btn, .nav, .blueprint, .tag).
 * This file adds the page layout and the landing-page sections. The design it follows was a
 * React prototype with inline styles; here it is plain classes, because the site serves
 * `script-src 'self'` and `style-src 'self'` would be the next thing to tighten.
 */

:root {
  --gutter: clamp(20px, 5vw, 72px);
  --max: 1280px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ink-soft: color-mix(in srgb, var(--color-text) 80%, transparent);
  --ink-muted: color-mix(in srgb, var(--color-text) 70%, transparent);
  --on-dark: var(--color-bg);
  --on-dark-soft: color-mix(in srgb, var(--color-bg) 85%, transparent);
  --on-dark-line: color-mix(in srgb, var(--color-bg) 25%, transparent);
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; text-wrap: pretty; font-size: 16px; line-height: 1.6; }
a { color: var(--color-accent-700); }
a:hover { color: var(--color-accent-900); }
code { font-family: var(--mono); font-size: 0.88em; background: var(--color-neutral-200);
  padding: 1px 5px; }
pre { font-family: var(--mono); font-size: 13.5px; line-height: 1.65; overflow-x: auto;
  background: var(--color-accent-900); color: var(--color-accent-100); padding: 18px 20px;
  margin: 0 0 24px; }
pre code { background: none; padding: 0; font-size: inherit; color: inherit; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 50; background: var(--color-bg); padding: 8px 12px; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.upper { text-transform: uppercase; letter-spacing: 0.02em; }

/* ── chrome ─────────────────────────────────────────────────────────────── */
.nav.site-nav { position: sticky; top: 0; z-index: 20; background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider); padding-inline: var(--gutter);
  flex-wrap: wrap; row-gap: 8px; }
.site-nav .nav-brand { font-size: 20px; letter-spacing: 0.08em; text-transform: uppercase;
  margin-right: auto; }
.site-nav a[aria-current="page"] { color: var(--color-accent-700); text-decoration: underline;
  text-underline-offset: 6px; }
.site-nav .btn-primary, .site-nav .btn-primary:hover { color: var(--color-bg); }
@media (max-width: 760px) {
  .site-nav .nav-extra { display: none; }
}

.site-footer .wrap { padding-block: 32px; display: flex; flex-wrap: wrap; gap: 16px 32px;
  align-items: center; font-size: 14px; color: color-mix(in srgb, var(--color-text) 72%, transparent); }
.site-footer .brand { font-family: var(--font-heading); font-weight: 600; font-size: 18px;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text); }
.site-footer .motto { margin-right: auto; }
.site-footer .note { flex-basis: 100%; font-size: 13px; margin: 0; }

/* ── shared section furniture ───────────────────────────────────────────── */
.kicker { display: block; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase;
  font-weight: 600; color: var(--color-accent-700); margin-bottom: 12px; }
.rule-line { height: 1px; background: var(--color-divider); margin-bottom: 32px; }
.section-title { font-size: clamp(32px, 4.2vw, 52px); line-height: 1.04; text-transform: uppercase;
  letter-spacing: 0.01em; margin: 0 0 48px; max-width: 22ch; }
.section-lead { font-size: 16px; line-height: 1.6; margin: 0; color: var(--ink-soft); }
.section { padding: 96px 0; scroll-margin-top: 80px; }
.section + .section { padding-top: 0; }
.dark { background: var(--color-accent-900); color: var(--on-dark); scroll-margin-top: 60px; }
.dark .kicker { color: var(--color-accent-200); }
.dark .rule-line { background: var(--on-dark-line); margin-bottom: 48px; }
.dark a { color: var(--color-accent-200); }
.btn-lg { min-height: 44px; padding-inline: 22px; font-size: 16px; }
.btn.btn-primary, .btn.btn-primary:hover { color: var(--color-bg); }
.btn-secondary { color: var(--color-text); }

/* ── hero ───────────────────────────────────────────────────────────────── */
.hero { padding: clamp(48px, 7vw, 96px) 0 88px; display: grid; gap: 56px; align-items: center;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 460px), 1fr)); }
.hero h1 { font-size: clamp(48px, 6.6vw, 96px); line-height: 1.01; letter-spacing: 0.005em;
  text-transform: uppercase; margin: 0 0 0 -0.05em; }
.hero h1 span { display: block; }
.hero h1 .accent { color: var(--color-accent); }
.hero .lead { font-size: 18px; line-height: 1.55; max-width: 48ch; margin: 28px 0 0;
  color: color-mix(in srgb, var(--color-text) 82%, transparent); }
.name-note { margin: 24px 0 0; max-width: 48ch; font-size: 14px; line-height: 1.55; color: var(--ink-muted);
  border-left: 2px solid var(--color-accent); padding-left: 12px; }
.flow pre { margin: 4px 0 0; font-size: 12.5px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.hero-term { min-width: 0; }

.term { background: var(--color-accent-900); color: var(--on-dark);
  border-color: var(--color-accent-900); }
.term-bar { display: flex; justify-content: space-between; gap: 12px; padding: 10px 16px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-bg) 22%, transparent);
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600;
  color: var(--color-accent-200); }
.term-body { padding: 18px 18px 22px; font-family: var(--mono); font-size: 13px; line-height: 1.7;
  min-height: 330px; overflow-x: auto; }
.term-line { white-space: pre-wrap; word-break: break-word; }
.term-line .p { font-weight: 600; }
.t-cmd .p, .t-info .p { color: var(--color-accent-300); }
.t-info { color: color-mix(in srgb, var(--color-bg) 70%, transparent); }
.t-ok .p { color: var(--color-accent-900); background: var(--color-accent-200); padding: 0 5px; }
.t-fail .p { color: var(--color-accent-900); background: var(--color-bg); padding: 0 5px; }
.t-diff { color: var(--color-accent-200); }
.t-dim { color: color-mix(in srgb, var(--color-bg) 55%, transparent); }
.cursor { display: inline-block; width: 8px; height: 15px; vertical-align: middle;
  background: var(--color-accent-300); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .cursor { animation: none; } }
.term-controls { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; align-items: center; }
.term-controls .btn { min-height: 40px; padding-inline: 16px; }
.term-controls .hint { font-size: 13px; color: var(--ink-muted); margin-left: 4px; }

/* ── 01 the rule ────────────────────────────────────────────────────────── */
.rule-code { font-family: var(--mono); font-size: clamp(15px, 1.6vw, 20px);
  color: var(--color-accent-200); word-break: break-all; }
.rule-big { font-family: var(--font-heading); font-weight: 600; font-size: clamp(44px, 8.4vw, 124px);
  line-height: 1; margin: 8px 0 8px clamp(0px, 2vw, 32px); word-break: break-word; }
.notes { display: grid; gap: 32px; margin-top: 64px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.note { display: flex; flex-direction: column; gap: 10px; padding-top: 16px;
  border-top: 1px solid color-mix(in srgb, var(--color-bg) 30%, transparent); }
.note .n { font-size: 13px; letter-spacing: 0.08em; font-weight: 600; color: var(--color-accent-200); }
.note .t { font-family: var(--font-heading); font-weight: 600; font-size: 24px; line-height: 1.1;
  text-transform: uppercase; letter-spacing: 0.02em; }
.note .b { font-size: 15px; line-height: 1.6; color: var(--on-dark-soft); }

/* ── 02 flows ───────────────────────────────────────────────────────────── */
.flows { display: grid; gap: 40px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.flow { padding: clamp(22px, 3vw, 36px); }
.flow-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  flex-wrap: wrap; margin-bottom: 28px; }
.flow-head .name { font-family: var(--font-heading); font-weight: 600; font-size: 30px;
  text-transform: uppercase; letter-spacing: 0.02em; }
.flow-head .verb { font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase;
  font-weight: 600; color: var(--color-accent-700); }
.steps { list-style: none; margin: 0; padding: 0; }
.step { display: grid; grid-template-columns: 28px 1fr; gap: 16px; transition: opacity .4s; }
.step .rail { position: relative; display: flex; justify-content: center; }
.step .rail::before { content: ""; position: absolute; top: 0; bottom: 0; width: 1px;
  background: var(--color-accent); transition: background .4s; }
.step:last-child .rail::before { background: transparent; }
.step .dot { position: relative; margin-top: 4px; width: 13px; height: 13px;
  background: var(--color-accent); border: 1px solid var(--color-accent); transition: background .4s; }
.step .body { padding-bottom: 22px; }
.step .head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.step .num { font-size: 13px; font-weight: 600; letter-spacing: 0.08em; color: var(--color-accent-700); }
.step .t { font-family: var(--font-heading); font-weight: 600; font-size: 20px; line-height: 1.15;
  text-transform: uppercase; letter-spacing: 0.02em; }
.step .tag { font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.step p { font-size: 14px; line-height: 1.55; margin: 6px 0 0; color: color-mix(in srgb, var(--color-text) 78%, transparent); }
/* Animated state, only once the script has taken over (html.js). Without it every step is lit. */
.js .step.is-future { opacity: 0.4; }
.js .step.is-future .dot { background: var(--color-bg); }
.js .step.is-future .rail::before, .js .step.is-current .rail::before { background: var(--color-divider); }
.js .step.is-future .tag { visibility: hidden; }

/* ── 03 product screenshots ────────────────────────────────────────────── */
.shots-head { font-size: 22px; text-transform: uppercase; letter-spacing: 0.02em; margin: 8px 0 20px; }
.shots { display: grid; gap: 32px 28px; margin-bottom: 48px; max-width: 920px; }
.shots-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); align-items: start; }
.shots-wide { grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); align-items: start; }
.shot .blueprint { background: var(--color-surface); padding: 10px; }
.shot-dark .blueprint { background: #0d1117; border-color: var(--color-accent-900); }
.shot img { width: 100%; height: auto; }
.shot-link { display: block; cursor: zoom-in; }
.shot-link:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }
.shot figcaption { font-size: 13.5px; line-height: 1.55; margin-top: 14px; color: var(--ink-soft); }
.shot figcaption .n { font-weight: 600; letter-spacing: 0.08em; color: var(--color-accent-700); margin-right: 6px; }

/* ── 03 architecture ────────────────────────────────────────────────────── */
.split { display: grid; gap: 24px 64px; align-items: end; margin-bottom: 40px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.split .section-title { margin: 0; }
.layer { display: grid; grid-template-columns: minmax(110px, 200px) 1fr; border-bottom: 1px solid var(--color-divider); }
.layer-name { padding: 20px 24px; border-right: 1px solid var(--color-divider); display: flex;
  flex-direction: column; gap: 4px; justify-content: center; }
.layer-name .n { font-size: 13px; letter-spacing: 0.08em; font-weight: 600; color: var(--color-accent-700); }
.layer-name .t { font-family: var(--font-heading); font-weight: 600; font-size: 18px;
  text-transform: uppercase; letter-spacing: 0.02em; }
.layer-items { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.comp { all: unset; box-sizing: border-box; cursor: pointer; padding: 20px 24px; display: flex;
  flex-direction: column; gap: 4px; transition: background .2s; box-shadow: inset 0 -2px 0 transparent; }
.comp:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; }
.comp[aria-pressed="true"] { background: var(--color-accent-100); box-shadow: inset 0 -2px 0 var(--color-accent); }
.comp .t { font-family: var(--font-heading); font-weight: 600; font-size: 22px;
  text-transform: uppercase; letter-spacing: 0.02em; }
.comp .s { font-size: 13px; color: var(--ink-muted); }
.arch-detail { display: grid; gap: 24px 48px; padding: 28px 24px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.arch-detail[hidden] { display: none; }
.arch-detail .intro { display: flex; flex-direction: column; gap: 10px; }
.arch-detail .name { font-family: var(--font-heading); font-weight: 600; font-size: 32px;
  line-height: 1.04; text-transform: uppercase; }
.arch-detail .lead { font-size: 15px; line-height: 1.6; color: var(--ink-soft); }
.facts { list-style: none; margin: 0; padding: 0; counter-reset: fact; }
.facts li { display: grid; grid-template-columns: 32px 1fr; gap: 8px; padding: 11px 0;
  border-top: 1px solid var(--color-divider); font-size: 14px; line-height: 1.5; counter-increment: fact; }
.facts li::before { content: counter(fact, decimal-leading-zero); font-weight: 600;
  color: var(--color-accent-700); letter-spacing: 0.06em; }
@media (max-width: 560px) {
  .layer { grid-template-columns: 1fr; }
  .layer-name { border-right: 0; border-bottom: 1px solid var(--color-divider); padding-block: 12px; }
}

/* ── 04 built since / capabilities ──────────────────────────────────────── */
.caps { display: grid; gap: 0; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  border-top: 1px solid var(--color-divider); }
.cap { padding: 24px 24px 28px 0; border-bottom: 1px solid var(--color-divider); display: flex;
  flex-direction: column; gap: 8px; }
.cap .k { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600;
  color: var(--color-accent-700); }
.cap .t { font-family: var(--font-heading); font-weight: 600; font-size: 22px; line-height: 1.1;
  text-transform: uppercase; letter-spacing: 0.02em; }
.cap p { margin: 0; font-size: 14.5px; color: var(--ink-soft); }
.also { margin: 24px 0 0; font-size: 14.5px; color: var(--ink-muted); max-width: 90ch; }

/* ── 05 auditor Q&A ─────────────────────────────────────────────────────── */
.qa-grid { display: grid; gap: 40px 64px; align-items: start;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.qa-grid .sticky { position: sticky; top: 96px; }
.qa-grid .section-title { margin-bottom: 14px; }
.qa { border-top: 1px solid var(--color-divider); }
.qa:last-child { border-bottom: 1px solid var(--color-divider); }
.qa summary { cursor: pointer; list-style: none; display: grid; grid-template-columns: 36px 1fr 24px;
  gap: 12px; padding: 20px 0; align-items: baseline; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary:hover { color: var(--color-accent-700); }
.qa summary .n { font-size: 13px; font-weight: 600; letter-spacing: 0.08em; color: var(--color-accent-700); }
.qa summary .q { font-family: var(--font-heading); font-weight: 600; font-size: 22px; line-height: 1.15;
  text-transform: uppercase; letter-spacing: 0.02em; }
.qa summary::after { content: "+"; font-size: 20px; text-align: right; grid-column: 3; grid-row: 1; }
.qa[open] summary::after { content: "\2212"; }
.qa p { margin: 0; padding: 0 36px 24px 48px; font-size: 15px; line-height: 1.6;
  color: color-mix(in srgb, var(--color-text) 82%, transparent); }

/* ── limits ─────────────────────────────────────────────────────────────── */
.limits { list-style: none; margin: 0; padding: 0; display: grid; gap: 0 48px;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); }
.limits li { padding: 18px 0; border-top: 1px solid var(--color-divider); font-size: 15px; color: var(--ink-soft); }
.limits strong { color: var(--color-text); }

/* ── access ─────────────────────────────────────────────────────────────── */
.access { padding: 96px 0; }
.access .wrap { display: grid; gap: 40px; align-items: end;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr)); }
.access h2 { font-size: clamp(36px, 5vw, 64px); line-height: 1.02; text-transform: uppercase;
  letter-spacing: 0.01em; margin: 0; }
.access p { font-size: 16px; line-height: 1.6; margin: 0 0 20px; color: var(--on-dark-soft); }
.dark .btn-inverse, .dark .btn-inverse:hover { min-height: 48px; padding-inline: 24px; font-size: 16px;
  background: var(--color-bg); color: var(--color-accent-900); border-color: var(--color-bg); }
.dark .btn-inverse:hover { background: var(--color-accent-100); color: var(--color-accent-900); }
.dark .btn-ghost-dark { min-height: 48px; padding-inline: 24px; font-size: 16px; color: var(--on-dark);
  border-color: color-mix(in srgb, var(--color-bg) 45%, transparent); }
.dark .btn-ghost-dark:hover { color: var(--on-dark); background: color-mix(in srgb, var(--color-bg) 10%, transparent); }

/* ── prose pages (docs, verify, how it works, about) ────────────────────── */
.prose main { max-width: 50rem; margin: 0 auto; padding: clamp(40px, 6vw, 80px) var(--gutter) 96px; }
.prose main > h1 { font-size: clamp(40px, 5.4vw, 72px); line-height: 1.02;
  text-transform: uppercase; letter-spacing: 0.005em; margin: 0 0 24px; }
.prose main h2 { font-size: clamp(26px, 3vw, 34px); text-transform: uppercase; letter-spacing: 0.01em;
  margin: 56px 0 16px; padding-top: 16px; border-top: 1px solid var(--color-divider); }
.prose main h3 { font-size: 22px; text-transform: uppercase; letter-spacing: 0.02em; margin: 32px 0 10px; }
.prose main p, .prose main li { color: var(--ink-soft); }
.prose main strong { color: var(--color-text); }
.prose main ul, .prose main ol { padding-left: 1.3rem; margin: 0 0 20px; }
.prose main li { margin: 6px 0; }
.prose main blockquote { margin: 0 0 20px; padding: 4px 0 4px 20px; border-left: 3px solid var(--color-accent); }
.prose main hr { border: 0; height: 1px; background: var(--color-divider); margin: 40px 0; }
.prose main .table { margin: 0 0 24px; display: block; overflow-x: auto; }
.prose main .table td, .prose main .table th { vertical-align: top; }
.lead { font-size: 19px; line-height: 1.55; color: color-mix(in srgb, var(--color-text) 82%, transparent); }
.note-box { border: 1px solid var(--color-divider); border-left: 3px solid var(--color-accent);
  padding: 14px 18px; margin: 0 0 32px; font-size: 15px; }
.more { margin-top: 32px; font-weight: 600; }
dl.docs { margin: 32px 0 0; border-top: 1px solid var(--color-divider); }
dl.docs dt { font-family: var(--font-heading); font-weight: 600; font-size: 24px; text-transform: uppercase;
  letter-spacing: 0.02em; padding-top: 20px; }
dl.docs dt a { text-decoration: none; }
dl.docs dd { margin: 4px 0 0; padding-bottom: 20px; border-bottom: 1px solid var(--color-divider); color: var(--ink-soft); }