:root {
  color-scheme: dark;
  --bg: #0b0d0f;
  --panel: #12161a;
  --panel-2: #171c20;
  --line: #30383f;
  --text: #e7e1d5;
  --muted: #9ca6ac;
  --amber: #d4a24c;
  --steel: #80a8b5;
  --danger: #c46d5e;
  --ok: #93ad7b;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px),
    radial-gradient(circle at 75% 0%, rgba(128,168,181,.12), transparent 34rem),
    var(--bg);
  background-size: 32px 32px, 32px 32px, auto, auto;
  color: var(--text);
}
a { color: var(--steel); }
.masthead {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.4rem;
  align-items: center;
  padding: 2rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(11,13,15,.9);
}
.sigil {
  width: 5rem;
  height: 5rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--amber);
  font: 700 2rem/1 ui-monospace, monospace;
  transform: rotate(45deg);
}
.sigil > * { transform: rotate(-45deg); }
.sigil span {
  position: absolute;
  margin-top: 3.2rem;
  font-size: .5rem;
  color: var(--amber);
}
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: .45rem; font-size: clamp(2rem, 5vw, 4.4rem); line-height: .95; }
h2 { margin-bottom: 0; font-size: 1.15rem; }
.lede { margin-bottom: 0; max-width: 70rem; color: var(--muted); }
.eyebrow {
  margin-bottom: .45rem;
  color: var(--amber);
  font: 700 .72rem/1.2 ui-monospace, monospace;
  letter-spacing: .14em;
}
.back {
  border: 1px solid var(--line);
  padding: .7rem 1rem;
  text-decoration: none;
}
main { width: min(1500px, calc(100% - 2rem)); margin: 1rem auto 4rem; }
.notice, .panel, .metrics article, .boundary {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(23,28,32,.98), rgba(14,17,20,.98));
}
.notice { padding: 2rem; color: var(--muted); }
.metrics {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}
.metrics article { padding: 1rem; min-height: 7rem; }
.metrics span, .metrics small { display: block; color: var(--muted); }
.metrics strong { display: block; margin: .45rem 0; font: 700 1.25rem/1.1 ui-monospace, monospace; color: var(--amber); overflow-wrap: anywhere; }
.panel { padding: 1rem; margin-bottom: 1rem; }
.panel > header {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 1rem;
}
label { color: var(--muted); font-size: .78rem; }
select {
  display: block;
  min-width: 14rem;
  margin-top: .35rem;
  padding: .55rem;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
}
.chart-panel svg { width: 100%; min-height: 26rem; background: #0d1012; border: 1px solid #252c31; }
.caption { margin: .8rem 0 0; color: var(--muted); font-size: .78rem; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font: .75rem/1.4 ui-monospace, monospace; }
th, td { padding: .55rem .65rem; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
th { color: var(--steel); }
.pass { color: var(--ok); }
.reject { color: var(--amber); }
.fail { color: var(--danger); }
.fact-list { margin: 0; }
.fact-list div {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(8rem, auto);
  gap: 1rem;
  padding: .65rem 0;
  border-bottom: 1px solid var(--line);
}
.fact-list div:last-child { border-bottom: 0; }
.fact-list dt { color: var(--muted); }
.fact-list dd { margin: 0; text-align: right; color: var(--amber); font: 700 .82rem/1.3 ui-monospace, monospace; overflow-wrap: anywhere; }
.harmonic-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: .7rem; }
.harmonic-cards article { padding: .85rem; border: 1px solid var(--line); background: var(--panel-2); }
.harmonic-cards strong { display: block; margin: .35rem 0; color: var(--amber); font: 700 1.3rem/1 ui-monospace, monospace; }
.harmonic-cards span, .harmonic-cards small { display: block; color: var(--muted); margin-top: .18rem; }
.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .6rem; }
.download-grid a { padding: .75rem; border: 1px solid var(--line); text-decoration: none; }
code { display: block; overflow-wrap: anywhere; margin-top: 1rem; color: var(--muted); }
.boundary { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: 1rem; }
.boundary b { color: var(--danger); font-size: 2.4rem; }
.boundary p { margin: 0; color: var(--muted); }
.boundary span { display: block; margin-bottom: .2rem; color: var(--text); font-weight: 700; }
.axis { stroke: #53616a; stroke-width: 1; }
.gridline { stroke: #263037; stroke-width: 1; }
.exact-line { fill: none; stroke: var(--amber); stroke-width: 3; }
.mc-line { fill: none; stroke: var(--steel); stroke-width: 2; stroke-dasharray: 7 5; }
.point { fill: var(--steel); }
.chart-label { fill: var(--muted); font: 12px ui-monospace, monospace; }
.legend-exact { fill: var(--amber); }
.legend-mc { fill: var(--steel); }
@media (max-width: 1100px) {
  .metrics { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 850px) {
  .masthead { grid-template-columns: auto 1fr; }
  .back { grid-column: 1 / -1; text-align: center; }
  .metrics, .grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .metrics, .grid { grid-template-columns: 1fr; }
  .sigil { width: 3.8rem; height: 3.8rem; }
  .panel > header { align-items: stretch; flex-direction: column; }
  select { width: 100%; }
  .fact-list div { grid-template-columns: 1fr; gap: .25rem; }
  .fact-list dd { text-align: left; }
}