/* Zirkon LLC — one stylesheet, no external requests, no tracking. */

:root {
  color-scheme: light;
  --ink: #000000;
  --paper: #ffffff;
  --mist: #efeeea;
  --rule: #dcdad4;
  --accent: #5c6a8d;
  --green: #2ea361;
  --muted: #55534e;
  --rect: 4px;
  --measure: 34rem;
  --font: "Futura", "Avenir Next", "Century Gothic", ui-sans-serif, system-ui,
          -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header ---------- */

header.site {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}

.wordmark {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  margin-right: auto;
}

nav.site a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  margin-left: 1.15rem;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

nav.site a:first-child { margin-left: 0; }
nav.site a:hover { color: var(--ink); }
nav.site a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }

/* ---------- Type ---------- */

h1 {
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.75rem;
  max-width: var(--measure);
}

h2 {
  font-size: 1.25rem;
  margin: 2.4rem 0 0.6rem;
  max-width: var(--measure);
}

h3 {
  font-size: 1rem;
  margin: 1.6rem 0 0.35rem;
  max-width: var(--measure);
}

p, ul, ol, dl { max-width: var(--measure); }
p { margin: 0 0 0.9rem; }
ul, ol { margin: 0 0 0.9rem; padding-left: 1.15rem; }
li { margin-bottom: 0.35rem; }

.lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: var(--measure);
}

a { color: var(--accent); }
a:hover { color: var(--ink); }

strong { font-weight: 600; }

/* ---------- Blocks ---------- */

main { padding-bottom: 3.5rem; }

.hero { padding: 1.5rem 0 0.5rem; }
.hero h1 { margin-top: 1.2rem; font-size: 2.35rem; }

.rule { border: 0; border-top: 1px solid var(--rule); margin: 2.4rem 0 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 1.2rem 0 0;
  max-width: 100%;
}

.card {
  background: var(--mist);
  border-radius: var(--rect);
  padding: 1.1rem 1.15rem;
}

.card h3 { margin-top: 0; }
.card p { margin-bottom: 0; font-size: 0.95rem; color: var(--muted); max-width: none; }

.panel {
  background: var(--mist);
  border-radius: var(--rect);
  padding: 1.15rem 1.25rem;
  margin: 1.2rem 0;
  max-width: var(--measure);
}

.panel :last-child { margin-bottom: 0; }

dl.facts { margin: 1.2rem 0; }
dl.facts dt { font-weight: 600; margin-top: 0.85rem; }
dl.facts dd { margin: 0.1rem 0 0; color: var(--muted); }

.mark {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: var(--rect);
  background: var(--green);
  margin-right: 0.5rem;
  vertical-align: 0.05rem;
}

.button {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  border-radius: var(--rect);
  padding: 0.6rem 1.1rem;
  font-size: 0.95rem;
  margin-top: 0.4rem;
}

.button:hover { color: var(--paper); opacity: 0.85; }

.stamp {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

/* ---------- Footer ---------- */

footer.site {
  border-top: 1px solid var(--rule);
  padding: 1.6rem 0 2.6rem;
  font-size: 0.88rem;
  color: var(--muted);
}

footer.site p { max-width: none; margin-bottom: 0.4rem; }
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--ink); }
footer.site nav a { margin-right: 1rem; }

@media (max-width: 34rem) {
  body { font-size: 16px; }
  .hero h1 { font-size: 1.9rem; }
  h1 { font-size: 1.7rem; }
  nav.site a { margin-left: 0; margin-right: 1rem; }
  header.site .wrap { display: block; }
  .wordmark { display: block; margin-bottom: 0.5rem; }
}

/* ---------- Inline code and quoted prompt text ---------- */

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--mist);
  padding: 0.05rem 0.35rem;
  border-radius: var(--rect);
}

.quote {
  border-left: 3px solid var(--rule);
  padding: 0.1rem 0 0.1rem 1rem;
  margin: 0.4rem 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: var(--measure);
}

/* ---------- Tables ---------- */

.table-wrap {
  overflow-x: auto;
  margin: 1.2rem 0;
  max-width: 100%;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 32rem;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--rule);
}

th {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

td.state { white-space: nowrap; }

.tag {
  display: inline-block;
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 0.05rem 0.55rem;
  border-radius: var(--rect);
  background: var(--mist);
  color: var(--muted);
}

.tag.ok { background: #e2f3e9; color: #1b6a3e; }

/* ---------- Requirement list ---------- */

.matrix {
  list-style: none;
  padding: 0;
  margin: 1.2rem 0;
  max-width: 100%;
}

.matrix li {
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 0.4rem 1.5rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule);
  margin: 0;
}

.matrix .req { font-weight: 600; }

.matrix .req small {
  display: block;
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--muted);
}

.matrix .ans { max-width: var(--measure); }
.matrix .ans p { margin: 0 0 0.4rem; }
.matrix .ans p:last-child { margin-bottom: 0; }

/* ---------- Footer columns ---------- */

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 1.25rem 2rem;
  margin-bottom: 1.5rem;
}

.footer-grid h4 {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
}

.footer-grid a {
  display: block;
  margin: 0 0 0.35rem;
  text-decoration: none;
}

@media (max-width: 34rem) {
  .matrix li { grid-template-columns: 1fr; }
}