:root {
  --void: #07070A;
  --crust: #101018;
  --regolith: #1A1A24;
  --rim: #2A2A38;
  --dust: #8A8798;
  --chalk: #E8E6EF;
  --gold: #C9A227;
  --gold-bright: #E7C14A;
  --warning: #B5482F;
  --measure: 66ch;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--void);
  color: var(--chalk);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.shell { width: min(100% - 3rem, 62rem); margin-inline: auto; }

a { color: var(--gold-bright); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--chalk); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
}

header.site {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem 0 3rem;
  flex-wrap: wrap;
}

.wordmark {
  font-weight: 300;
  font-size: 1.15rem;
  letter-spacing: 0.42em;
  color: var(--chalk);
  text-decoration: none;
}
.wordmark span { color: var(--gold); }

nav.site { display: flex; gap: 1.75rem; font-size: 0.95rem; }
nav.site a { color: var(--dust); text-decoration: none; }
nav.site a:hover, nav.site a[aria-current='page'] { color: var(--gold-bright); }

h1 {
  font-weight: 300;
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  max-width: 18ch;
}

h2 {
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin: 3.5rem 0 1rem;
  max-width: 30ch;
}

h3 { font-weight: 600; font-size: 1.05rem; margin: 2rem 0 0.5rem; }

p, li { max-width: var(--measure); color: var(--chalk); }
p.lead { font-size: 1.2rem; color: var(--dust); max-width: 54ch; }
.muted { color: var(--dust); }
.small { font-size: 0.9rem; }

.demo {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
  padding: 3rem 0 3.5rem;
  border-top: 1px solid var(--rim);
  border-bottom: 1px solid var(--rim);
  margin: 3rem 0;
}
@media (max-width: 44rem) { .demo { grid-template-columns: 1fr; gap: 2rem; } }

.disc-wrap { position: relative; width: 100%; max-width: 15rem; }
.disc-readout {
  position: absolute; inset: 0;
  display: grid; place-content: center;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  color: var(--void);
  pointer-events: none;
}
.disc-score { font-size: 2.9rem; font-weight: 600; line-height: 1; }
.disc-unit { font-size: 0.7rem; opacity: 0.6; text-align: center; margin-top: 0.2rem; }

.verdict { font-size: 1.35rem; font-weight: 400; margin: 0 0 0.5rem; }
.reason { color: var(--dust); margin: 0 0 1.75rem; max-width: 44ch; }

label.control { display: block; color: var(--dust); font-size: 0.95rem; margin-bottom: 0.6rem; }
label.control b { color: var(--chalk); font-family: 'IBM Plex Mono', monospace; font-weight: 600; }

input[type='range'] {
  width: min(100%, 26rem);
  accent-color: var(--gold);
  height: 1.75rem;
}

.facts { display: grid; gap: 2.5rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); margin: 2.5rem 0; }
.facts p { margin: 0.35rem 0 0; color: var(--dust); font-size: 0.97rem; }
.facts h3 { margin: 0; color: var(--chalk); }

dl.meta { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 2rem; margin: 1.5rem 0; }
dl.meta dt { color: var(--dust); }
dl.meta dd { margin: 0; font-family: 'IBM Plex Mono', monospace; font-size: 0.95rem; }

table.data { border-collapse: collapse; width: 100%; max-width: 46rem; margin: 1.5rem 0; font-size: 0.95rem; }
table.data th, table.data td { text-align: left; padding: 0.7rem 1rem 0.7rem 0; border-bottom: 1px solid var(--rim); vertical-align: top; }
table.data th { color: var(--dust); font-weight: 500; }

.callout {
  border-left: 2px solid var(--gold);
  padding: 0.25rem 0 0.25rem 1.25rem;
  margin: 2rem 0;
}

footer.site {
  border-top: 1px solid var(--rim);
  margin-top: 5rem;
  padding: 2.5rem 0 4rem;
  color: var(--dust);
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
footer.site a { color: var(--dust); }
footer.site nav { display: flex; gap: 1.5rem; }

.legal p, .legal li { color: var(--dust); }
.legal h2 { color: var(--chalk); }
.legal ul { padding-left: 1.1rem; }
.legal li { margin-bottom: 0.5rem; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}