:root,
html[data-theme="dark"] {
  --field: #0a1930;
  --panel: #122844;
  --line: #1e3a5c;
  --ink: #e8eef6;
  --ember: #8ec4f0;
  --dim: #8aa3c2;
  --sig: #ffffff;
  --f-sans: "Archivo", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --f-cn: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --f-mono: ui-monospace, "SF Mono", Menlo, Consolas, "IBM Plex Mono", monospace;
}
html[data-theme="light"] {
  --field: #f3ebdd;
  --panel: #ebe2d2;
  --line: #d4c6b0;
  --ink: #2c241c;
  --ember: #b56a32;
  --dim: #7d6e5e;
  --sig: #2c241c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--field);
  color: var(--ink);
  font-family: var(--f-sans);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--ember); color: var(--field); }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--ember); outline-offset: 3px; }

.page { max-width: 1120px; margin: 0 auto; padding: 0 28px; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 18px;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-family: var(--f-cn);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .16em;
}
.brand span {
  display: block;
  margin-top: 3px;
  font-family: var(--f-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .22em;
  color: var(--dim);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13px;
  color: var(--dim);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.is-on { color: var(--ink); }

.theme-btn {
  display: flex;
  gap: 5px;
  align-items: center;
  margin-left: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: transparent;
  cursor: pointer;
}
.theme-btn:hover { border-color: var(--ink); }
.swatch {
  display: block;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  box-sizing: border-box;
  border: 1px solid rgba(127, 127, 127, .35);
}
.swatch-dark { background: #0a1930; }
.swatch-light { background: #f3ebdd; }
html[data-theme="dark"] .swatch-dark,
html[data-theme="light"] .swatch-light {
  box-shadow: 0 0 0 2px var(--ember);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: 48px 64px;
  align-items: end;
  padding: 72px 0 36px;
}
.kicker {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ember);
  margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--f-cn);
  font-weight: 700;
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.22;
  letter-spacing: .04em;
}
.hero .lead {
  margin-top: 22px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--dim);
  max-width: 38em;
}
.hero-side {
  padding-bottom: 6px;
  color: var(--dim);
  font-size: 14px;
  line-height: 1.85;
}
.hero-side strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 8px;
}

.track {
  position: relative;
  height: 60px;
  margin: 4px 0 18px;
}
.track::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  border-top: 1.85px solid var(--sig);
}
html[data-theme="dark"] .track::after {
  box-shadow: 0 0 3px rgba(255, 255, 255, .22);
}
.rover {
  position: absolute;
  left: 0;
  bottom: 1px;
  width: 60px;
  height: 52px;
  fill: var(--sig);
  transform-origin: 50% 100%;
  will-change: transform;
  pointer-events: none;
  shape-rendering: crispEdges;
  image-rendering: pixelated;
}
.rover .cut { fill: var(--field); }
html[data-theme="light"] .rover {
  fill: var(--ember);
}

.gates {
  display: grid;
  grid-template-columns: 1.15fr .85fr .85fr;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.gate {
  padding: 36px 32px 36px 0;
}
.gate + .gate {
  padding-left: 32px;
  border-left: 1px solid var(--line);
}
.gate .n {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--ember);
  letter-spacing: .12em;
}
.gate h2 {
  font-size: 20px;
  font-weight: 650;
  margin: 10px 0 12px;
  letter-spacing: .04em;
}
.gate p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dim);
}

.manifest {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  padding: 72px 0;
}
.manifest blockquote {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 650;
  line-height: 1.45;
  letter-spacing: .03em;
}
.manifest blockquote em {
  display: block;
  margin-top: 10px;
  font-style: normal;
  color: var(--ember);
}
.manifest .copy { font-size: 15.5px; line-height: 1.9; color: var(--dim); }
.manifest .copy p + p { margin-top: 14px; }
.acts { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.meta {
  display: block;
  margin-bottom: 14px;
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: .08em;
}

.btn {
  display: inline-block;
  background: var(--ember);
  color: var(--field);
  font-size: 14px;
  padding: 11px 20px;
  border-radius: 3px;
}
.btn:hover { opacity: .88; }
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn.ghost:hover { border-color: var(--ink); }

.join {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  background: var(--panel);
  padding: 40px 36px;
  margin-bottom: 72px;
}
.join h2 {
  font-size: 24px;
  font-weight: 650;
  letter-spacing: .04em;
}
.join p {
  margin-top: 10px;
  color: var(--dim);
  font-size: 15px;
  line-height: 1.8;
  max-width: 36em;
}
.mailto {
  font-family: var(--f-mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--ember);
  border-bottom: 1px solid var(--ember);
  padding-bottom: 3px;
}

footer.site {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 22px 0 40px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--dim);
}
footer.site a:hover { color: var(--ink); }

/* manifesto article */
.doc-head {
  padding: 48px 0 20px;
  max-width: 720px;
}
.doc-head h1 {
  font-family: var(--f-cn);
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: .06em;
  margin-top: 8px;
}
.doc-head p { color: var(--dim); margin-top: 10px; }
.doc {
  max-width: 720px;
  padding: 12px 0 48px;
}
.doc p { font-size: 16.5px; line-height: 1.95; margin: 0 0 22px; }
.doc h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .04em;
  margin: 36px 0 14px;
}
.doc .chap {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ember);
  margin: 48px 0 8px;
}
.slog {
  border-left: 2px solid var(--ember);
  padding: 2px 0 2px 16px;
  margin: 24px 0;
  font-weight: 650;
  font-size: 17px;
  line-height: 1.8;
}
.about {
  max-width: 720px;
  padding: 8px 0 40px;
  border-top: 1px solid var(--line);
}
.about dt {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--dim);
  margin-top: 22px;
}
.about dd { font-size: 16px; line-height: 1.85; margin-top: 6px; }

.err {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}
.err h1 { font-size: 36px; letter-spacing: .12em; }
.err p { margin-top: 14px; color: var(--dim); font-family: var(--f-mono); font-size: 11px; }

@media (max-width: 840px) {
  .hero, .gates, .manifest, .join { grid-template-columns: 1fr; }
  .gate + .gate { border-left: none; border-top: 1px solid var(--line); padding-left: 0; }
  .join { padding: 28px 22px; }
}