:root {
  --paper: #efe6d8;
  --paper-2: #e5d9c6;
  --ink: #1c1612;
  --muted: #5e564c;
  --line: #d2c4b0;
  --stage: #171411;
  --accent: #9c3418;
  --chip: #f7f1e6;
  --sans: "Outfit", "Avenir Next", "Segoe UI", sans-serif;
  --serif: "Fraunces", "Iowan Old Style", Palatino, serif;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.5;
  font-weight: 400;
}
img { max-width: 100%; }
a { color: inherit; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.site-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  padding: 0.9rem 1.4rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(239, 230, 216, 0.94);
  backdrop-filter: blur(8px);
  z-index: 5;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--serif);
  font-weight: 560;
  font-size: 1.35rem;
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem 1.05rem;
  font-size: 0.95rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--muted);
  white-space: nowrap;
}
.site-nav a.here { color: var(--ink); box-shadow: inset 0 -1px 0 var(--ink); }

main { padding: 0 0 4rem; }
.wrap { width: min(1080px, calc(100% - 2.4rem)); margin: 0 auto; }
.narrow { width: min(740px, calc(100% - 2.4rem)); margin: 0 auto; }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); margin: 0 0 0.6rem; }
h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 0 0 0.7rem; }
h3 { font-size: 1.25rem; margin: 0 0 0.4rem; }
p { margin: 0.55rem 0; }
.lede { font-size: 1.2rem; max-width: 38rem; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(16rem, 0.7fr);
  gap: 1.5rem;
  width: min(1180px, calc(100% - 2rem));
  margin: 1rem auto 0;
  align-items: stretch;
}
.stage {
  background: var(--stage);
  min-height: 68vh;
  position: relative;
  border: 1px solid #2a241e;
}
.stage canvas, .view-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.view-axes {
  position: absolute;
  left: 0.8rem;
  bottom: 0.7rem;
  margin: 0;
  color: #d9cbb8;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}
.hero-copy { padding: 1.2rem 0.2rem 0 0; min-width: 0; }
.hero-copy h1 { font-size: clamp(2.3rem, 4vw, 3.5rem); }
.kicker {
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.8rem;
}
.count {
  font-family: var(--serif);
  font-size: clamp(5rem, 12vw, 8.5rem);
  line-height: 0.8;
  margin: 0.4rem 0 0.2rem;
  letter-spacing: -0.045em;
  color: var(--accent);
}
.hero-actions, .row-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1rem 0; }
button, .button {
  background: transparent;
  border: 1px solid var(--ink);
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button[aria-pressed="true"], button.primary, .button.primary {
  background: var(--ink);
  color: var(--paper);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }
.stage-note { color: var(--muted); font-size: 0.95rem; }

.band {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 2.2rem 0;
}
.band div { padding: 1rem 1.1rem; border-right: 1px solid var(--line); }
.band div:last-child { border-right: 0; }
.band strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 560;
  letter-spacing: -0.03em;
}
.band span { color: var(--muted); font-size: 0.92rem; }

section { padding: 2.4rem 0 0.4rem; }
ol.conditions { padding-left: 1.3rem; max-width: 40rem; }
ol.conditions li { margin: 0.35rem 0; }
ol.conditions li.optional {
  list-style: none;
  margin-left: -1.3rem;
  padding: 0.8rem 0.9rem;
  background: var(--paper-2);
  border-left: 3px solid var(--accent);
}
.optional[hidden] { display: none; }

.figure-block { margin: 1.2rem 0 0.4rem; }
.axes-note { color: var(--muted); font-size: 0.88rem; margin: 0.35rem 0 0.6rem; }
.layer-row { display: flex; flex-wrap: wrap; gap: 1rem 1.3rem; align-items: flex-end; }
.layer { margin: 0; }
.layer figcaption { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.25rem; }
.layer-grid, .net-face {
  display: grid;
  grid-template-columns: repeat(4, 1.45rem);
  grid-auto-rows: 1.45rem;
}
.sq {
  border-style: solid;
  border-color: #1c1612;
  display: grid;
  place-items: center;
  font-size: 0.68rem;
  font-weight: 600;
  color: #1c1612;
  text-shadow: 0 0 2px #fff, 0 0 2px #fff;
}
.axis-x { font-size: 0.78rem; color: var(--muted); margin-top: 0.2rem; }
.two-pics { display: flex; flex-wrap: wrap; gap: 2rem; margin-top: 0.6rem; }
.two-pics figcaption { margin-top: 0.35rem; font-size: 0.92rem; }

.net {
  display: grid;
  grid-template-columns: repeat(4, max-content);
  grid-template-areas:
    ". top . ."
    "left front right back"
    ". bottom . .";
  justify-content: start;
  width: max-content;
  max-width: 100%;
}
.net-top { grid-area: top; }
.net-left { grid-area: left; }
.net-front { grid-area: front; }
.net-right { grid-area: right; }
.net-back { grid-area: back; }
.net-bottom { grid-area: bottom; }
.net-scroll { overflow-x: auto; padding-bottom: 0.4rem; }

.legend { display: flex; flex-wrap: wrap; gap: 0.55rem 0.8rem; margin: 0.4rem 0 0.8rem; }
.legend-item { display: inline-flex; align-items: center; gap: 0.3rem; font-size: 0.85rem; color: var(--muted); }
.legend-item i { width: 0.85rem; height: 0.85rem; display: block; border: 1px solid #1c1612; }

.next-links { list-style: none; padding: 0; margin: 1rem 0 0; }
.next-links a { text-underline-offset: 0.18em; }

.filters { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.8rem 0; }
.filters button { font-size: 0.92rem; }
.shown { color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11.5rem, 1fr));
  gap: 0.7rem;
}
.card {
  text-align: left;
  background: var(--chip);
  border: 1px solid var(--line);
  padding: 0.55rem;
  display: grid;
  gap: 0.35rem;
}
.card.on { border-color: var(--ink); }
.card b { font-family: var(--serif); font-size: 1.15rem; font-weight: 560; }
.card small { color: var(--muted); line-height: 1.3; }
.mini { display: flex; gap: 0.2rem; }
.mini-grid { display: grid; grid-template-columns: repeat(4, 0.42rem); grid-auto-rows: 0.42rem; }
.mini-grid i { display: block; }

.detail {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(16rem, 0.7fr);
  gap: 1.2rem;
  margin: 1rem 0 1.6rem;
}
.detail .stage { min-height: 460px; }
.stat-list { list-style: none; padding: 0; margin: 0.4rem 0 0.8rem; }
.stat-list li { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); padding: 0.35rem 0; }
.stat-list span { color: var(--muted); }

table { border-collapse: collapse; width: 100%; font-size: 0.98rem; margin: 0.8rem 0 1.2rem; }
th, td { text-align: left; padding: 0.4rem 0.55rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; font-size: 0.82rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
tr.pick { cursor: pointer; }
tr.pick.on, tr.pick:hover { background: var(--paper-2); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.callout {
  border-left: 3px solid var(--accent);
  padding: 0.2rem 0 0.2rem 0.9rem;
  margin: 1rem 0;
}
.warn {
  background: #1c1612;
  color: #f3eadc;
  padding: 0.9rem 1rem;
  margin: 1rem 0;
}
.warn strong { font-family: var(--serif); font-weight: 560; font-size: 1.25rem; }

.slider { display: flex; align-items: center; gap: 0.7rem; margin: 0.6rem 0; }
.slider input { width: min(16rem, 100%); accent-color: var(--ink); }

.dims td:first-child { width: 28%; }
.tag {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  padding: 0.05rem 0.35rem;
  color: var(--muted);
}
.tag.obs { border-color: var(--accent); color: var(--accent); }
.tag.wr { border-color: var(--ink); color: var(--ink); }

.site-foot {
  border-top: 1px solid var(--line);
  padding: 1.2rem 1.4rem 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.err { color: var(--accent); }

.burst-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(16rem, 0.6fr);
  gap: 1.2rem;
  align-items: start;
}
.burst-layout .stage { min-height: 72vh; }
.dirs { display: grid; grid-template-columns: auto 1fr; gap: 0.2rem 0.6rem; font-variant-numeric: tabular-nums; }
.dirs i { width: 0.8rem; height: 0.8rem; display: inline-block; border: 1px solid #1c1612; margin-right: 0.3rem; vertical-align: -1px; }

select {
  background: var(--chip);
  border: 1px solid var(--ink);
  padding: 0.4rem 0.5rem;
  max-width: 100%;
}

@media (max-width: 860px) {
  .hero, .detail, .burst-layout { grid-template-columns: 1fr; }
  .stage, .burst-layout .stage { min-height: 58vh; }
  .band { grid-template-columns: 1fr 1fr; }
  .band div:nth-child(odd) { border-right: 1px solid var(--line); }
  .band div:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .site-head { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .hero-copy { padding: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}