:root {
  --ore: #5c3a24;
  --ore-lite: #8a5a38;
  --steel: #9aa3ad;
  --ember: #e07a2f;
  --alarm: #c41e1e;
  --night: #0e0d0c;
  --night-2: #171412;
  --paper: #ece4d6;
  --ok: #6b8f62;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "Share Tech Mono", ui-monospace, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 72px; }

body {
  margin: 0;
  background: var(--night);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--ember); text-decoration: underline; text-underline-offset: 3px; }
button, input { font-family: inherit; }
code { font-family: var(--mono); background: rgba(224, 122, 47, 0.18); padding: 0 0.3em; }

.dust {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  opacity: 0.14;
  background-image: url("images/texture.webp");
  background-size: 360px;
  mix-blend-mode: multiply;
}

.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 60; background: var(--ember); color: #000; padding: 8px 12px; }

.top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 24px;
  background: rgba(14, 13, 12, 0.9);
  border-bottom: 3px solid var(--ember);
}
.logo { font-family: var(--serif); font-weight: 700; font-size: 20px; }
.logo small {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--steel);
}
.nav-toggle {
  display: none;
  background: transparent;
  color: var(--ember);
  border: 1px solid var(--ember);
  padding: 6px 12px;
  cursor: pointer;
}
.nav-links { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; }
.nav-links a { color: var(--steel); }
.nav-links a.is-active, .nav-links a:hover { color: var(--ember); }
.nav-links .live { background: var(--ember); color: #111; padding: 5px 12px; }

.hero { position: relative; min-height: 100vh; padding-bottom: 40px; }
.hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14,13,12,0.25) 0%, rgba(14,13,12,0.78) 55%, rgba(14,13,12,0.96) 100%);
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 32px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding-top: 14vh;
}
.kicker, .vlabel, .n {
  font-family: var(--mono);
  letter-spacing: 0.14em;
  color: var(--ember);
  font-size: 12px;
  margin: 0 0 10px;
}
h1, h2, h3 { font-family: var(--serif); line-height: 1.08; margin: 0 0 14px; }
h1 { font-size: clamp(40px, 6vw, 78px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 22px; }
.lead { max-width: 40em; color: rgba(236, 228, 214, 0.9); }

.css-panel {
  background: rgba(23, 20, 18, 0.86);
  border: 1px solid var(--ore-lite);
  padding: 20px;
}
.css-panel.is-wide { border-color: var(--alarm); }
.mm {
  font-family: var(--mono);
  font-size: 72px;
  line-height: 1;
  margin: 0 0 8px;
  color: var(--ember);
}
.mm small { font-size: 22px; color: var(--steel); margin-left: 6px; }
#css-bar { width: 100%; accent-color: var(--ember); }
.css-state { font-size: 14px; color: var(--steel); }
.teeth { display: flex; gap: 6px; margin-top: 12px; }
.teeth i {
  flex: 1;
  height: 18px;
  background: var(--steel);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

.swallow {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  width: min(1180px, calc(100% - 48px));
  margin: 28px auto 0;
  padding: 0;
}
.swallow li {
  font-family: var(--mono);
  font-size: 13px;
  border: 1px solid var(--ore-lite);
  padding: 6px 12px;
  background: rgba(92, 58, 36, 0.45);
}
.hero-actions {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 48px));
  margin: 20px auto 0;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn { display: inline-flex; padding: 10px 18px; border: 1px solid currentColor; font-size: 14px; }
.btn.fill { background: var(--ember); color: #111; border-color: var(--ember); }
.btn.line { color: var(--paper); }

.shell { width: min(1100px, calc(100% - 48px)); margin: 0 auto; padding: 80px 0; }
.intro { color: var(--steel); max-width: 46em; }
.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.three article {
  background: var(--night-2);
  padding: 20px;
  border-top: 4px solid var(--ore-lite);
}
.three article:nth-child(2) { border-top-color: var(--ember); }
.three article:nth-child(3) { border-top-color: var(--alarm); }
.three ul, .io ul, #rules ol { margin: 0; padding-left: 1.1em; }
.three li, .io li, #rules li { margin: 0.35em 0; }

.darker { background: #120f0d; }
.lane {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  margin: 48px 0;
}
.lane.rev { direction: rtl; }
.lane.rev > * { direction: ltr; }
.lane figure { margin: 0; outline: 1px solid var(--ore); }
.lane img { width: 100%; height: 300px; object-fit: cover; filter: contrast(1.05) saturate(0.9); }

.nodes {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.nodes li {
  background: var(--night-2);
  padding: 16px 18px;
  border-left: 6px solid var(--ember);
}
.nodes strong { display: block; font-family: var(--serif); margin-bottom: 4px; }

.vals { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.vals article { padding: 20px; background: #1c1714; }
.vals p { margin: 0; color: var(--steel); }

#rules ol {
  background: var(--night-2);
  padding: 20px 20px 20px 40px;
  border-left: 6px solid var(--alarm);
}

.io { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.io > div { background: #1c1714; padding: 20px; }
.live-url { margin-top: 28px; font-family: var(--mono); font-size: 13px; }
footer { padding: 24px 28px 40px; color: var(--steel); font-size: 13px; border-top: 1px solid #2a221c; }

@media (max-width: 880px) {
  .hero-grid, .three, .lane, .lane.rev, .nodes, .vals, .io { grid-template-columns: 1fr; direction: ltr; }
  .nav-toggle { display: inline-block; }
  .nav-links {
    display: none;
    position: absolute;
    right: 12px;
    left: 12px;
    top: 100%;
    background: var(--night-2);
    flex-direction: column;
    padding: 12px;
    border: 1px solid var(--ember);
  }
  .nav-links.open { display: flex; }
}