:root {
  --mud: #8b3a2a;
  --mud-d: #3d1c16;
  --caustic: #d4c4a8;
  --sand: #f4efe6;
  --steam: #c9d6d4;
  --mute: #7a6a5c;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 70px; }
body { margin: 0; background: var(--mud-d); color: var(--sand); font-family: var(--sans); line-height: 1.7; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: #e8b090; text-decoration: underline; text-underline-offset: 3px; }
button, input { font-family: inherit; }
code { font-family: var(--mono); background: rgba(139,58,42,0.2); padding: 0 0.3em; }
.mudfx { pointer-events: none; position: fixed; inset: 0; z-index: 40; opacity: 0.12; background-image: url("images/texture.webp"); background-size: 340px; mix-blend-mode: multiply; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 10px; top: 10px; z-index: 70; background: var(--mud); color: #fff; padding: 8px; }
.top { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 22px; background: rgba(61,28,22,0.94); border-bottom: 4px solid var(--mud); }
.logo { font-family: var(--serif); font-weight: 700; }
.logo small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em; color: var(--caustic); font-weight: 400; }
.nav-toggle { display: none; background: transparent; color: var(--caustic); border: 1px solid var(--caustic); padding: 6px 12px; cursor: pointer; }
.nav-links { display: flex; flex-wrap: wrap; gap: 12px; font-size: 14px; }
.nav-links a { color: #cbb8a6; }
.nav-links a.is-active, .nav-links a:hover { color: #fff; }
.nav-links .live { background: var(--mud); color: #fff; padding: 5px 12px; }
.hero { position: relative; min-height: 100vh; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.veil { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(61,28,22,0.25), rgba(61,28,22,0.9)); }
.hero-in { position: relative; z-index: 1; width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 14vh 0 8vh; }
.kicker, .vlabel, .n { font-family: var(--mono); letter-spacing: 0.14em; font-size: 12px; color: #e8b090; margin: 0 0 10px; }
h1, h2, h3 { font-family: var(--serif); margin: 0 0 12px; line-height: 1.08; }
h1 { font-size: clamp(38px, 6vw, 76px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 22px; }
.lead { max-width: 42em; }
.kt { margin: 24px 0; max-width: 440px; background: rgba(139,58,42,0.45); padding: 16px 18px; border-radius: 0 40px 0 0; }
.kt.is-low { outline: 2px solid #f0c23a; }
.c { font-family: var(--mono); font-size: 56px; line-height: 1; margin: 0 0 8px; }
#kt-bar { width: 100%; accent-color: var(--mud); }
#kt-state { margin: 8px 0 0; font-size: 14px; }
.cta { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-flex; padding: 10px 18px; border: 1px solid currentColor; }
.btn.fill { background: var(--mud); color: #fff; border-color: var(--mud); }
.btn.line { color: var(--sand); }
.w { width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 80px 0; }
#need, #bench, #rules { background: var(--sand); color: var(--mud-d); }
#need .vlabel, #bench .vlabel, #rules .vlabel { color: var(--mud); }
.quiet { color: var(--mute); }
.tri { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.tri article { background: #fff; padding: 18px; border-bottom: 6px solid var(--mud); }
.tri ul, .io ul, #rules ol { margin: 0; padding-left: 1.1em; }
.caustic { background: #4a241c; }
.flow { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; margin: 40px 0; }
.flow.rev { direction: rtl; }
.flow.rev > * { direction: ltr; }
.flow figure { margin: 0; }
.flow img { width: 100%; height: 250px; object-fit: cover; border-radius: 80px 8px 80px 8px; }
.six { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.six li { background: #fff; padding: 14px; }
.six strong { display: block; font-family: var(--serif); }
.quad { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.quad article { background: var(--mud-d); padding: 18px; }
.quad p { margin: 0; color: var(--caustic); }
#rules ol { background: #fff; padding: 18px 18px 18px 38px; border-left: 6px solid var(--mud); }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.io > div { background: var(--mud-d); padding: 18px; }
.url { margin-top: 24px; font-family: var(--mono); font-size: 13px; }
footer { padding: 22px 28px 36px; color: var(--mute); font-size: 13px; }
@media (max-width: 860px) {
  .tri, .flow, .flow.rev, .six, .quad, .io { grid-template-columns: 1fr; direction: ltr; }
  .nav-toggle { display: inline-block; }
  .nav-links { display: none; position: absolute; top: 100%; left: 12px; right: 12px; background: var(--mud-d); flex-direction: column; padding: 12px; border: 1px solid var(--caustic); }
  .nav-links.open { display: flex; }
}