:root {
  --shop: #eff1f0;
  --gun: #31363b;
  --fail: #e8600a;
  --pass: #1e7a46;
  --mute: #5c6368;
  --ink: #1c1f22;
  --display: "Archivo", "Noto Sans SC", sans-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;
  color: var(--ink);
  background: var(--shop);
  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(--fail); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
label { display: block; font-size: 13px; color: var(--mute); }
input[type="range"] { width: min(260px, 100%); accent-color: var(--fail); }
.steel {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 6;
  opacity: 0.1;
  background-image: url("images/texture.webp");
  background-size: 360px auto;
  mix-blend-mode: multiply;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--fail); color: #fff; padding: 8px; }
.bar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 22px;
  background: var(--gun);
  color: #eff1f0;
}
.brand { font-family: var(--display); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: #a8b0b4;
  font-weight: 400;
  text-transform: none;
}
.nav-toggle {
  display: none;
  background: var(--fail);
  color: #fff;
  border: 0;
  padding: 6px 12px;
  font-family: var(--display);
}
.nav-links { display: flex; gap: 14px; font-size: 14px; flex-wrap: wrap; }
.nav-links a { color: #c5ccd0; }
.nav-links a.is-active, .nav-links a:hover { color: #fff; }
.nav-links .live { background: var(--fail); color: #fff; padding: 6px 12px; }
.hero { position: relative; min-height: 100vh; display: flex; flex-direction: column; justify-content: flex-end; }
.hero-shot { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(49, 54, 59, 0.12) 8%, rgba(239, 241, 240, 0.82) 48%, rgba(239, 241, 240, 0.97) 72%);
}
.traveler { position: relative; z-index: 2; padding: 6vh 6vw 6vh; max-width: 780px; }
.kicker {
  font-family: var(--mono);
  letter-spacing: 0.16em;
  font-size: 11px;
  color: var(--fail);
  margin: 0 0 12px;
}
h1, h2, h3 { font-family: var(--display); margin: 0 0 12px; line-height: 1.05; font-weight: 700; letter-spacing: 0.02em; }
h1 { font-size: clamp(34px, 5.6vw, 64px); text-transform: uppercase; }
h2 { font-size: clamp(24px, 3vw, 36px); }
.lead { max-width: 44em; color: #3a4046; text-transform: none; letter-spacing: 0; font-family: var(--sans); }
.gauge-row { display: flex; gap: 16px; align-items: center; margin: 18px 0; padding: 14px; background: #fff; border: 1px solid #d5dad8; max-width: 440px; }
.gauge-row.is-ok { border-color: var(--pass); }
.dial {
  --pct: 72%;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  background: conic-gradient(var(--fail) 0 var(--pct), #d5dad8 var(--pct) 100%);
  position: relative;
  flex-shrink: 0;
}
.dial span {
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  background: #fff;
}
.gauge-row.is-ok .dial { background: conic-gradient(var(--pass) 0 var(--pct), #d5dad8 var(--pct) 100%); }
.n { font-family: var(--display); font-size: 40px; margin: 0 0 4px; }
.n span { font-size: 16px; color: var(--mute); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; padding: 10px 16px; border: 1px solid currentColor; font-size: 14px; font-family: var(--display); letter-spacing: 0.08em; }
.btn.cert { background: var(--gun); color: #fff; border-color: var(--gun); }
.btn.line { color: var(--gun); background: #fff; }
.w { width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0; }
.alt { background: #e4e7e6; }
.tri { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-top: 20px; }
.tri article { background: #fff; padding: 16px; border-top: 4px solid var(--gun); }
.tri ul, .io ul, #rules ol { margin: 0; padding-left: 1.1em; }
.steps { padding-left: 1.2em; max-width: 48em; }
.steps li { margin-bottom: 10px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.pair img { width: 100%; height: 240px; object-fit: cover; }
.pair figcaption { font-size: 13px; color: var(--mute); margin-top: 8px; }
#rules ol {
  background: #fff;
  padding: 16px 16px 16px 36px;
  border-left: 8px solid var(--fail);
  max-width: 46em;
}
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.io > div { background: #fff; padding: 16px; }
.url { margin-top: 18px; font-family: var(--mono); font-size: 13px; }
footer { padding: 20px 24px 40px; color: var(--mute); font-size: 13px; }
@media (max-width: 900px) {
  .tri, .pair, .io { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; }
  .bar { flex-wrap: wrap; }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    background: #3a4046;
    padding: 12px;
  }
  .nav-links.open { display: flex; }
  .traveler { padding: 24px 18px 32px; }
  h1 { font-size: 34px; }
}