:root {
  --hull: #0b1520;
  --hull-2: #12202c;
  --glass: #78c7e8;
  --silver: #c5d0d8;
  --amber: #d98a3a;
  --paper: #e7eef3;
  --mute: #7d8d9a;
  --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: 78px; }
body {
  margin: 0;
  padding-right: 44px;
  background: var(--hull);
  color: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--glass); text-decoration: underline; text-underline-offset: 3px; }
button, input { font-family: inherit; }
code { font-family: var(--mono); background: rgba(120,199,232,0.14); padding: 0 0.3em; }
.steel {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  opacity: 0.1;
  background-image: url("images/texture.webp");
  background-size: 360px;
  mix-blend-mode: overlay;
}
.ata-rail {
  position: fixed;
  right: 0;
  top: 0;
  bottom: 0;
  width: 44px;
  z-index: 35;
  background: var(--hull-2);
  border-left: 1px solid rgba(120,199,232,0.35);
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--glass);
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 70; background: var(--glass); color: #041018; padding: 8px; }
.mast {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 22px;
  background: rgba(11,21,32,0.92);
  border-bottom: 1px solid rgba(120,199,232,0.28);
}
.mark { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-weight: 700; }
.mark small { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em; color: var(--mute); font-weight: 400; }
.port {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 3px solid var(--glass);
  box-shadow: inset 0 0 0 4px var(--hull), 0 0 0 1px var(--silver);
  background: radial-gradient(circle at 30% 30%, #d4f1ff, #1a4a62);
}
.nav-toggle { display: none; background: transparent; color: var(--glass); border: 1px solid var(--glass); 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(--glass); }
.nav-links .live { background: var(--glass); color: #041018; padding: 5px 12px; }

.hero {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: center;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  min-height: 100vh;
  padding: 40px 0;
}
.porthole {
  width: min(520px, 100%);
  aspect-ratio: 1;
  margin: 0 auto;
  border-radius: 50%;
  overflow: hidden;
  border: 14px solid #8ea0ad;
  box-shadow: 0 0 0 8px #2a3540, 0 30px 80px rgba(0,0,0,0.45);
}
.porthole img { width: 100%; height: 100%; object-fit: cover; }
.kicker, .vlabel, .n { font-family: var(--mono); letter-spacing: 0.16em; font-size: 12px; color: var(--glass); margin: 0 0 10px; }
h1, h2, h3 { font-family: var(--serif); margin: 0 0 12px; line-height: 1.1; }
h1 { font-size: clamp(36px, 5vw, 68px); }
h2 { font-size: clamp(26px, 3vw, 38px); }
h3 { font-size: 22px; }
.lead { max-width: 40em; color: var(--silver); }
.gauge {
  margin: 22px 0;
  max-width: 420px;
  background: var(--hull-2);
  padding: 16px 18px;
  clip-path: polygon(0 0, 100% 0, 100% 86%, 92% 100%, 0 100%);
}
.gauge.is-fast { outline: 2px solid var(--amber); }
.ata { font-family: var(--mono); font-size: 64px; line-height: 1; margin: 0 0 8px; color: var(--glass); }
#ata-bar { width: 100%; accent-color: var(--glass); }
#ata-state { margin: 8px 0 0; font-size: 14px; color: var(--silver); }
.cta { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-flex; padding: 10px 18px; border: 1px solid currentColor; }
.btn.fill { background: var(--glass); color: #041018; border-color: var(--glass); }
.btn.line { color: var(--paper); }

.shell { width: min(1080px, calc(100% - 48px)); margin: 0 auto; padding: 84px 0; }
#need, #bench, #rules { background: #dfe8ee; color: #0b1520; }
#need .vlabel, #bench .vlabel, #rules .vlabel { color: #1d5c78; }
.note { color: var(--mute); }
.plates { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.plates article {
  background: #fff;
  padding: 18px;
  clip-path: polygon(0 12px, 12px 0, 100% 0, 100% 100%, 0 100%);
}
.plates ul, .io ul, #rules ol { margin: 0; padding-left: 1.1em; }
.deep { background: var(--hull-2); }
.orbit { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; margin: 42px 0; }
.orbit.flip { direction: rtl; }
.orbit.flip > * { direction: ltr; }
.orbit figure { margin: 0; border-radius: 50% 8px 50% 8px; overflow: hidden; }
.orbit img { width: 100%; height: 260px; object-fit: cover; }
.ports { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ports li { background: #fff; padding: 14px; border-left: 5px solid var(--glass); }
.ports strong { display: block; font-family: var(--serif); }
.vals { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.vals article { background: var(--hull); padding: 18px; }
.vals p { margin: 0; color: var(--silver); }
#rules ol { background: #fff; padding: 18px 18px 18px 38px; border-left: 6px solid var(--amber); }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.io > div { background: var(--hull); 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: 900px) {
  body { padding-right: 0; }
  .ata-rail { display: none; }
  .hero, .plates, .orbit, .orbit.flip, .ports, .vals, .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(--hull-2);
    flex-direction: column;
    padding: 12px;
    border: 1px solid var(--glass);
  }
  .nav-links.open { display: flex; }
}