:root {
  --iron: #1a140f;
  --iron-2: #241c16;
  --amber: #c9a15a;
  --oil: #e8dcc8;
  --scorch: #a33b1c;
  --mute: #8a7b68;
  --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: 72px; }
body { margin: 0; background: var(--iron); color: var(--oil); font-family: var(--sans); line-height: 1.75; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--amber); text-decoration: underline; text-underline-offset: 3px; }
button, input { font-family: inherit; }
code { font-family: var(--mono); background: rgba(201,161,90,0.16); padding: 0 0.3em; }
.soot { pointer-events: none; position: fixed; inset: 0; z-index: 40; opacity: 0.1; background-image: url("images/film.webp"); background-size: 380px; mix-blend-mode: multiply; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 10px; top: 10px; z-index: 70; background: var(--amber); color: #111; padding: 8px; }
.head { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 24px; background: rgba(26,20,15,0.92); border-bottom: 1px solid rgba(201,161,90,0.35); }
.brand { font-family: var(--serif); font-weight: 700; }
.brand small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; color: var(--mute); font-weight: 400; }
.nav-toggle { display: none; background: transparent; color: var(--amber); border: 1px solid var(--amber); padding: 6px 12px; cursor: pointer; }
.nav-links { display: flex; flex-wrap: wrap; gap: 13px; font-size: 14px; }
.nav-links a { color: var(--mute); }
.nav-links a.is-active, .nav-links a:hover { color: var(--amber); }
.nav-links .live { background: var(--amber); color: #1a140f; padding: 5px 12px; }
.hero { position: relative; min-height: 100vh; }
.hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.smoke { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(26,20,15,0.25), rgba(26,20,15,0.9)); }
.hero-in { position: relative; z-index: 1; width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 15vh 0 8vh; }
.kicker, .vlabel, .n { font-family: var(--mono); letter-spacing: 0.16em; font-size: 12px; color: var(--amber); margin: 0 0 10px; }
h1, h2, h3 { font-family: var(--serif); margin: 0 0 12px; line-height: 1.1; }
h1 { font-size: clamp(38px, 6vw, 74px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 22px; }
.lead { max-width: 40em; }
.drop { margin: 24px 0; max-width: 420px; background: rgba(36,28,22,0.88); padding: 16px 18px; border-top: 3px solid var(--amber); }
.drop.is-burn { border-top-color: var(--scorch); }
.read { font-family: var(--mono); font-size: 56px; line-height: 1; margin: 0 0 8px; color: var(--amber); }
.read small { font-size: 16px; color: var(--mute); }
#drop-bar { width: 100%; accent-color: var(--amber); }
#drop-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(--amber); color: var(--iron); border-color: var(--amber); }
.btn.line { color: var(--oil); }
.w { width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 82px 0; }
#need, #bench, #rules { background: #efe6d6; color: var(--iron); }
#need .vlabel, #bench .vlabel, #rules .vlabel { color: #8a5a22; }
.quiet { color: var(--mute); }
.tri { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.tri article { background: #fff8ee; padding: 18px; }
.tri ul, .io ul, #rules ol { margin: 0; padding-left: 1.1em; }
.iron { background: var(--iron-2); }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; margin: 40px 0; }
.pair.rev { direction: rtl; }
.pair.rev > * { direction: ltr; }
.pair figure { margin: 0; }
.pair img { width: 100%; height: 260px; object-fit: cover; }
.six { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.six li { background: #fff8ee; padding: 14px; }
.six strong { display: block; font-family: var(--serif); }
.quad { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.quad article { background: #1a140f; padding: 18px; }
.quad p { margin: 0; color: var(--mute); }
#rules ol { background: #fff8ee; padding: 18px 18px 18px 38px; border-left: 5px solid var(--scorch); }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.io > div { background: #1a140f; 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, .pair, .pair.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(--iron-2); flex-direction: column; padding: 12px; border: 1px solid var(--amber); }
  .nav-links.open { display: flex; }
}