/* Horus public site.
   A specification, not a brochure. One left edge, serif for reading, sans for
   the controls. Colour marks a state: pine is something a witness holds, oxide
   is something open, amber is half-built. Nothing is fetched from another origin.

   Paper is a cool mineral grey-green. The accent is pine, the colour of a
   seal that has been checked, not a marketing blue. */

:root {
  --paper: #e7ece8;
  --panel: #f4f7f5;
  --sunk: #dce3de;
  --ink: #141816;
  --text: #24302a;
  --muted: #3e4d45;
  --faint: #5c6b63;
  --rule: #c5cfc8;
  --rule-strong: #aeb9b2;
  --pine: #1b4f3c;
  --pine-bg: #d5e6de;
  --oxide: #8a382c;
  --oxide-bg: #f3ddd8;
  --amber: #7a5410;
  --amber-bg: #f3e6c8;
  --code-bg: #dfe6e1;
  --term-bg: #121815;
  --term-tx: #d7e2db;
  --focus: #1b4f3c;
  --shadow: 0 1px 0 rgba(20, 24, 22, 0.04);
  --serif: Charter, "Iowan Old Style", Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", "Noto Sans", "Liberation Sans", sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "DejaVu Sans Mono", Menlo, Consolas, monospace;
  --frame: 1120px;
  --gutter: clamp(18px, 4vw, 36px);
  --measure: 68ch;
  --top-h: 58px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #101613; --panel: #18201c; --sunk: #121a16; --ink: #e7efe9; --text: #c9d5ce;
    --muted: #9aada3; --faint: #7e9188; --rule: #2a3831; --rule-strong: #3b4d44;
    --pine: #8fceb0; --pine-bg: #163028; --oxide: #f0a396; --oxide-bg: #3a201c;
    --amber: #e4c27a; --amber-bg: #332812; --code-bg: #1c2822; --term-bg: #0b0f0d;
    --term-tx: #d7e2db; --focus: #8fceb0;
  }
}
:root[data-theme="dark"] {
  --paper: #101613; --panel: #18201c; --sunk: #121a16; --ink: #e7efe9; --text: #c9d5ce;
  --muted: #9aada3; --faint: #7e9188; --rule: #2a3831; --rule-strong: #3b4d44;
  --pine: #8fceb0; --pine-bg: #163028; --oxide: #f0a396; --oxide-bg: #3a201c;
  --amber: #e4c27a; --amber-bg: #332812; --code-bg: #1c2822; --term-bg: #0b0f0d;
  --term-tx: #d7e2db; --focus: #8fceb0;
  color-scheme: dark;
}
:root[data-theme="light"] { color-scheme: light; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 1.05rem/1.65 var(--serif);
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; }
a { color: var(--pine); text-underline-offset: 0.16em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.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;
}
code, kbd, samp {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--code-bg);
  padding: 0.05em 0.28em;
  border-radius: 3px;
}
pre code { background: none; padding: 0; font-size: 0.92rem; }
h1, h2, h3 { color: var(--ink); font-weight: 560; letter-spacing: -0.015em; line-height: 1.2; }
h1 { font-size: clamp(2.1rem, 4.4vw, 3.35rem); margin: 0 0 0.45em; max-width: 18ch; }
h2 { font-size: clamp(1.55rem, 2.4vw, 2rem); margin: 1.6em 0 0.45em; }
h3 { font-size: 1.2rem; margin: 1.3em 0 0.35em; }
p { max-width: var(--measure); margin: 0.7em 0; }
.lede { font-size: 1.22rem; line-height: 1.5; color: var(--ink); max-width: 38ch; }

.skip {
  position: absolute; left: var(--gutter); top: 0; transform: translateY(-120%);
  background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 20;
  font-family: var(--sans);
}
.skip:focus { transform: none; }

.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.top__in, .foot__in, .sheet, .home {
  width: min(var(--frame), calc(100% - 2 * var(--gutter)));
  margin-inline: auto;
}
.top__in {
  min-height: var(--top-h);
  display: flex; align-items: center; gap: 22px;
}
.brand {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--ink); text-decoration: none; font-family: var(--serif);
  font-size: 1.2rem; font-weight: 600;
}
.brand:hover { text-decoration: none; }
.primary { display: flex; flex-wrap: wrap; gap: 4px 16px; font-family: var(--sans); font-size: 0.92rem; }
.primary a, .menu__panel a, .foot__col a { color: var(--text); text-decoration: none; }
.primary a:hover, .menu__panel a:hover, .foot__col a:hover { color: var(--pine); text-decoration: underline; }
.primary a[aria-current="page"], .menu__panel a[aria-current="page"], .foot__col a[aria-current="page"] {
  color: var(--pine); text-decoration: underline; text-underline-offset: 0.28em;
}
.tools { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.tool, .search__close {
  font-family: var(--sans); font-size: 0.88rem; color: var(--ink);
  background: transparent; border: 1px solid transparent; border-radius: 6px;
  min-height: 36px; padding: 4px 8px; display: inline-flex; align-items: center; gap: 6px;
  cursor: pointer; text-decoration: none;
}
.tool:hover { border-color: var(--rule); background: var(--panel); }
.tool kbd {
  background: var(--sunk); border: 1px solid var(--rule); padding: 0 5px; font-size: 0.75rem;
}
.menu { position: relative; }
.menu summary { list-style: none; }
.menu summary::-webkit-details-marker { display: none; }
.menu__panel {
  position: absolute; right: 0; top: calc(100% + 6px);
  background: var(--panel); border: 1px solid var(--rule); min-width: 220px;
  padding: 8px; display: grid; box-shadow: var(--shadow);
}
.menu__panel a { padding: 8px 10px; }
.menu { display: none; }

.sheet {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 36px;
  padding: 36px 0 72px;
}
.toc {
  position: sticky; top: calc(var(--top-h) + 18px); align-self: start;
  font-family: var(--sans); font-size: 0.84rem; line-height: 1.35;
}
.toc p { margin: 0 0 8px; color: var(--faint); font-family: var(--sans); }
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0; }
.toc a { display: block; color: var(--muted); text-decoration: none; padding: 4px 0 4px 10px; border-left: 2px solid var(--rule); }
.toc a:hover, .toc a.is-current { color: var(--ink); border-left-color: var(--pine); }
.toc .toc-h3 a { padding-left: 20px; font-size: 0.8rem; }
.doc__main, .home { min-width: 0; }
.doc__head { margin-bottom: 8px; }
.doc__head h1 { max-width: 16ch; }

.stamp {
  display: flex; gap: 16px; align-items: stretch; margin: 8px 0 28px;
}
.stamp__rule { width: 3px; background: var(--pine); flex: none; }
.stamp p { margin: 0; color: var(--muted); font-family: var(--sans); font-size: 0.92rem; max-width: 46ch; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 8px; }
.btn {
  font-family: var(--sans); font-size: 0.95rem; text-decoration: none;
  min-height: 42px; padding: 8px 14px; display: inline-flex; align-items: center;
  border: 1px solid var(--rule-strong); background: var(--panel); color: var(--ink);
}
.btn:hover { text-decoration: none; border-color: var(--pine); }
.btn--primary { background: var(--pine); border-color: var(--pine); color: #f6faf7; }
:root[data-theme="dark"] .btn--primary { color: #102018; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn--primary { color: #102018; }
}

.home { padding: 42px 0 80px; }
.split { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 40px; align-items: start; }
.facts { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--rule); }
.facts li { padding: 14px 0; border-bottom: 1px solid var(--rule); }
.facts strong { display: block; color: var(--ink); font-weight: 600; }
.facts span { color: var(--muted); font-family: var(--sans); font-size: 0.92rem; }

.tablewrap { overflow-x: auto; margin: 18px 0 8px; }
table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 0.92rem; line-height: 1.45; }
caption { text-align: left; color: var(--muted); font-family: var(--sans); margin-bottom: 8px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--rule); }
th { color: var(--ink); font-weight: 600; }
.t-note { color: var(--muted); font-family: var(--mono); font-size: 0.78rem; white-space: nowrap; }
.pill {
  font-family: var(--sans); font-size: 0.78rem; font-weight: 650;
  padding: 2px 0; background: none;
}
.pill--hold { color: var(--pine); }
.pill--part { color: var(--amber); }
.pill--off { color: var(--oxide); }
.filter { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; font-family: var(--sans); }
.filter button {
  min-height: 36px; padding: 4px 10px; border: 1px solid var(--rule); background: var(--panel);
  color: var(--text); font: 550 0.86rem/1.2 var(--sans); cursor: pointer;
}
.filter button[aria-pressed="true"] { border-color: var(--ink); color: var(--ink); }
.filter button span { color: var(--faint); margin-left: 6px; }
.filter__count { font-family: var(--sans); font-size: 0.86rem; color: var(--muted); }

.seq { list-style: none; margin: 18px 0; padding: 0; counter-reset: step; }
.seq > li { position: relative; margin: 0; padding: 0 0 22px 42px; counter-increment: step; }
.seq > li::before {
  content: counter(step); position: absolute; left: 0; top: 2px;
  width: 26px; height: 26px; display: grid; place-items: center;
  border: 1px solid var(--pine); color: var(--pine);
  font: 600 0.85rem/1 var(--sans);
}
.seq > li::after {
  content: ""; position: absolute; left: 12px; top: 32px; bottom: 4px; width: 1px; background: var(--rule);
}
.seq > li:last-child::after { display: none; }
.seq h3 { margin-top: 0; }

.findings { list-style: none; margin: 12px 0; padding: 0; }
.findings > li { padding: 18px 0; border-top: 1px solid var(--rule); }
.findings h3 { margin-top: 0; }
.findings .id {
  font-family: var(--mono); font-size: 0.78rem; color: var(--oxide); margin-right: 8px;
}

.term {
  background: var(--term-bg); color: var(--term-tx); padding: 16px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 0.86rem; line-height: 1.55; max-width: 70ch;
}
.term .c { color: #8fceb0; }
.term .p { color: #e4c27a; }

.note, .callout {
  border-left: 3px solid var(--oxide); padding: 4px 0 4px 14px; margin: 18px 0;
}
.callout { border-left-color: var(--pine); }
.queue { list-style: none; margin: 12px 0; padding: 0; }
.queue li { padding: 12px 0; border-top: 1px solid var(--rule); max-width: 68ch; }
.queue h3 { margin: 0 0 4px; font-size: 1.05rem; }
.queue p { margin: 0; }

.pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  margin-top: 48px; padding-top: 18px; border-top: 1px solid var(--rule);
  font-family: var(--sans);
}
.pager a { display: flex; flex-direction: column; gap: 2px; color: var(--ink); text-decoration: none; }
.pager a span { color: var(--faint); font-size: 0.8rem; }
.pager a:hover { color: var(--pine); }
.pager__next { text-align: right; }

.foot { border-top: 1px solid var(--rule); padding: 28px 0 40px; font-family: var(--sans); font-size: 0.9rem; }
.foot__in { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; }
.foot__about p, .foot__base p { color: var(--muted); max-width: 36ch; }
.foot__head { margin: 0 0 8px; color: var(--ink); }
.foot__col { display: grid; align-content: start; gap: 6px; }
.foot__base {
  width: min(var(--frame), calc(100% - 2 * var(--gutter)));
  margin: 22px auto 0; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.foot__base p { margin: 0; }

.search {
  border: none; padding: 0; background: transparent; width: min(560px, calc(100% - 24px));
}
.search::backdrop { background: rgba(16, 22, 19, 0.45); }
.search__box {
  display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center;
  background: var(--panel); border: 1px solid var(--rule-strong); padding: 12px;
}
.search__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.search__box input {
  border: none; background: transparent; color: var(--ink); font: 1rem/1.4 var(--serif); width: 100%;
}
.search__box input:focus { outline: none; }
.search__results { list-style: none; margin: 8px 0 0; padding: 0; background: var(--panel); border: 1px solid var(--rule); }
.search__results a { display: block; padding: 8px 12px; color: var(--ink); text-decoration: none; font-family: var(--sans); }
.search__results a.is-active, .search__results a:hover { background: var(--pine-bg); }
.search__results small { display: block; color: var(--faint); }

@media (max-width: 860px) {
  .primary, .tool__label, .tool kbd, .tool--source { display: none; }
  .menu { display: block; }
  .sheet, .split, .foot__in { grid-template-columns: 1fr; }
  .toc { position: static; }
  .pager { grid-template-columns: 1fr; }
  .pager__next { text-align: left; }
  h1 { max-width: none; }
}