:root {
  color-scheme: dark;
  --bg: #10191c;
  --surface: #18272a;
  --surface-2: #21363a;
  --text: #edf4f0;
  --muted: #a8bbb5;
  --line: rgba(237, 244, 240, .14);
  --accent: #e7c66e;
  --accent-2: #65c9b5;
  --max: 70rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 80% 0%, #29454a 0, transparent 34rem), var(--bg);
  color: var(--text);
  font: 16px/1.7 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: #fff0ae; }
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: .2rem;
  border-radius: .15rem;
}
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(16, 25, 28, .86);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: .7rem 1.1rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  padding: 1rem 1.2rem;
}
.brand { color: var(--text); font-weight: 700; letter-spacing: .04em; text-decoration: none; }
.nav-links { display: flex; flex-wrap: wrap; gap: .8rem 1rem; }
.nav-links a { color: var(--muted); text-decoration: none; }
.nav-links a:hover { color: var(--text); }
.wrap, .page { margin: 0 auto; max-width: var(--max); padding: 4rem 1.2rem; }
.page { max-width: 54rem; }
.hero { min-height: 74vh; display: grid; align-content: center; padding-top: 7rem; padding-bottom: 7rem; }
.eyebrow { color: var(--accent-2); font-size: .78rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.025em; }
h1 { font-size: clamp(2.6rem, 8vw, 5.8rem); margin: .4rem 0 1.3rem; max-width: 12ch; }
h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); margin-top: 0; }
h3 { font-size: 1.25rem; }
.lede { color: var(--muted); font-size: clamp(1.15rem, 2.5vw, 1.45rem); max-width: 42rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.card {
  background: linear-gradient(145deg, rgba(101, 201, 181, .09), rgba(255,255,255,.025));
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  padding: 1.35rem;
}
.card p:last-child { margin-bottom: 0; }
.pill {
  border: 1px solid rgba(231, 198, 110, .45);
  border-radius: 999px;
  color: var(--accent);
  display: inline-block;
  padding: .25rem .65rem;
}
.meta, .muted { color: var(--muted); }
.legal h2 { font-size: 1.45rem; margin-top: 2.3rem; }
.legal ul { padding-left: 1.3rem; }
.note {
  border-left: 3px solid var(--accent);
  background: rgba(231, 198, 110, .08);
  padding: .8rem 1rem;
}
.button {
  background: transparent;
  border: 1px solid rgba(231, 198, 110, .55);
  border-radius: 999px;
  color: var(--accent);
  cursor: pointer;
  display: inline-block;
  font: inherit;
  padding: .55rem .9rem;
  text-decoration: none;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}
.button:hover, .button:focus-visible {
  background: rgba(231, 198, 110, .14);
  border-color: var(--accent);
  color: #fff0ae;
  transform: translateY(-1px);
}
.button-primary { background: var(--accent); color: #10191c; font-weight: 700; }
.button-primary:hover, .button-primary:focus-visible { background: #fff0ae; color: #10191c; }
.lab-teaser { align-items: center; display: grid; gap: 2rem; grid-template-columns: minmax(12rem, .8fr) minmax(18rem, 1.2fr); }
.lab-intro h2 { margin-bottom: .7rem; }
.lab-console, .lab-workbench {
  background: linear-gradient(145deg, rgba(101, 201, 181, .12), rgba(255,255,255,.025));
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  overflow: hidden;
  position: relative;
}
.lab-console { min-height: 20rem; padding: 1.15rem; }
.lab-console::before, .lab-workbench::before {
  background-image: linear-gradient(rgba(101,201,181,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(101,201,181,.06) 1px, transparent 1px);
  background-size: 2rem 2rem;
  content: "";
  inset: 0;
  opacity: .55;
  pointer-events: none;
  position: absolute;
}
.lab-console > *, .lab-workbench > * { position: relative; z-index: 1; }
.lab-console-top { align-items: center; color: var(--muted); display: flex; font: .72rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; gap: .5rem; letter-spacing: .05em; text-transform: uppercase; }
.lab-console-top time { margin-left: auto; }
.status-dot { background: var(--accent-2); border-radius: 50%; box-shadow: 0 0 0 .25rem rgba(101, 201, 181, .12), 0 0 1rem var(--accent-2); display: inline-block; height: .55rem; width: .55rem; }
.signal-core { align-items: center; background: radial-gradient(circle, #fff0ae 0, var(--accent) 13%, rgba(101,201,181,.42) 42%, transparent 70%); display: flex; height: 10rem; justify-content: center; margin: 1.6rem auto 1rem; width: 10rem; }
.signal-core span { color: #10191c; font: 700 .75rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .18em; margin-left: .18em; }
.signal-core.is-thinking { animation: signal-pulse 1.2s ease-out; }
.lab-result { background: rgba(16,25,28,.7); border: 1px solid var(--line); border-radius: .85rem; padding: .8rem 1rem; }
.lab-result-label { color: var(--accent-2); font: .68rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; text-transform: uppercase; }
.lab-result p { margin: .5rem 0 0; }
.lab-page h1 { max-width: 14ch; }
.lab-workbench { margin: 2.5rem 0; padding: clamp(1.1rem, 3vw, 2rem); }
.lab-workbench-head { align-items: flex-start; display: flex; justify-content: space-between; gap: 1rem; }
.lab-workbench-head h2 { margin: .55rem 0 1.5rem; }
.signal-core-small { flex: 0 0 5rem; height: 5rem; margin: 0; width: 5rem; }
.signal-core-small span { font-size: .55rem; }
.lab-controls { display: grid; gap: 1rem; margin: 0 0 1.4rem; }
.lab-controls fieldset { border: 1px solid var(--line); border-radius: .9rem; margin: 0; min-width: 0; padding: .9rem; }
.lab-controls legend { color: var(--muted); font-size: .85rem; padding: 0 .35rem; }
.choice-options { display: flex; flex-wrap: wrap; gap: .5rem; }
.choice-button { background: rgba(16,25,28,.7); border: 1px solid var(--line); border-radius: .6rem; color: var(--muted); cursor: pointer; font: inherit; padding: .55rem .7rem; }
.choice-button:hover, .choice-button:focus-visible { border-color: var(--accent-2); color: var(--text); }
.choice-button.is-active { background: rgba(101,201,181,.15); border-color: var(--accent-2); color: var(--text); }
.lab-result-large { margin-top: 1.4rem; min-height: 7rem; }
.lab-console-foot { margin-top: 1.1rem; }
@keyframes signal-pulse {
  0% { filter: brightness(1); transform: scale(1); }
  35% { filter: brightness(1.65); transform: scale(1.12); }
  100% { filter: brightness(1); transform: scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .signal-core.is-thinking { animation: none; }
}
footer { border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { margin: 0 auto; max-width: var(--max); padding: 2rem 1.2rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .8rem 1.2rem; }
@media (max-width: 42rem) {
  .nav { align-items: flex-start; flex-direction: column; }
  .hero { min-height: auto; padding-top: 5rem; padding-bottom: 5rem; }
}