:root {
  color-scheme: light;
  --paper: #f6f2e7;
  --ink: #1e3027;
  --muted: #4e5c53;
  --accent: #a1452a;
  --line: #dad8ca;
  --green: #bbd79c;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: system-ui, sans-serif;
  --mono: ui-monospace, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 20px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.55 var(--sans); }
a { color: inherit; text-underline-offset: 4px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.wrap { width: min(1136px, calc(100% - 48px)); margin: 0 auto; }
.skip { position: absolute; top: 12px; left: 12px; padding: 8px 14px; background: white; transform: translateY(-180%); z-index: 2; }
.skip:focus { transform: translateY(0); }
.top, .footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-block: 20px; }
.top { border-bottom: 1px solid var(--line); }
.brand { font: 700 25px/1 var(--serif); letter-spacing: -.055em; text-decoration: none; }
.brand span { color: var(--accent); }
.brand small { padding: 3px 7px; margin-left: 8px; font: 700 10px var(--mono); border: 1px solid var(--line); border-radius: 12px; vertical-align: middle; letter-spacing: .04em; }
.issue { color: var(--muted); font: 650 12px var(--mono); text-decoration: none; }
.hero { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(28px, 6vw, 90px); align-items: center; padding-block: clamp(38px, 7vw, 84px); }
.eyebrow, .instrument-top, .instrument-foot { font: 650 11px/1.5 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.eyebrow { margin: 0 0 13px; color: var(--accent); }
.eyebrow span { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: currentColor; margin-right: 3px; }
h1, h2 { margin: 0; font-family: var(--serif); font-weight: 400; }
h1 { font-size: clamp(65px, 9vw, 126px); line-height: .83; letter-spacing: -.075em; }
h1 em { color: var(--accent); }
.intro { max-width: 38ch; margin-block: 24px 16px; color: var(--muted); }
.jump { font-weight: 650; font-size: 14px; }
.instrument { padding: 18px clamp(14px, 3vw, 30px); border-radius: 10px; color: #d6e1c7; background: #20362b; box-shadow: 0 14px 35px #24382b24; }
.instrument-top, .instrument-foot { display: flex; justify-content: space-between; gap: 8px; }
.signal { color: var(--green); }
.radar { position: relative; overflow: hidden; width: min(100%, 335px); aspect-ratio: 1; margin: 16px auto; border-radius: 50%; border: 1px solid #bdd39e79; background: linear-gradient(transparent 49.7%, #aec99351 50%, transparent 50.3%), linear-gradient(90deg, transparent 49.7%, #aec99351 50%, transparent 50.3%), radial-gradient(circle, #38543b, #20362b 78%); }
.radar i { position: absolute; inset: 12%; border: 1px solid #bdd39e50; border-radius: 50%; }
.radar i:nth-of-type(2) { inset: 25%; }
.radar i:nth-of-type(3) { inset: 38%; }
.sweep { position: absolute; inset: 0; background: conic-gradient(from 45deg, transparent 0 272deg, #b9d88b08 273deg, #b9d88b67 359deg, #c7e6a0 360deg); }
.origin, .dot { position: absolute; width: 7px; height: 7px; border-radius: 50%; background: #f4c485; box-shadow: 0 0 12px #f4c485ad; }
.origin { left: 50%; top: 50%; transform: translate(-50%, -50%); width: 5px; height: 5px; }
.one { left: 66%; top: 26%; }
.two { left: 73%; top: 43%; }
.three { left: 38%; top: 65%; background: var(--green); }
.experiment { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; padding-block: 0 18px; }
.controls, .result { border: 1px solid var(--line); border-radius: 10px; padding: clamp(18px, 4vw, 34px); }
.result { background: #eaecdc; }
h2 { font-size: clamp(29px, 4vw, 46px); line-height: 1.02; letter-spacing: -.045em; }
fieldset { padding: 0; margin: 15px 0 0; border: 0; min-inline-size: 0; }
legend { margin-bottom: 5px; font-size: 13px; font-weight: 650; }
.choices { display: flex; flex-wrap: wrap; gap: 6px; }
.choices label { position: relative; cursor: pointer; }
.choices input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.choices span { display: block; padding: 5px 10px; border: 1px solid var(--line); border-radius: 20px; font-size: 13px; }
.choices input:checked + span { background: #e0e8d3; border-color: #527149; color: #223c27; }
.choices input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
button { display: inline-flex; align-items: center; gap: 16px; margin-top: 18px; padding: 9px 14px; border: 0; border-radius: 4px; color: white; background: var(--ink); font: 650 14px var(--sans); cursor: pointer; }
button:hover { background: #385443; }
.result > p:not(.eyebrow) { max-width: 46ch; }
.result-note { border-top: 1px solid #cdd1bd; padding-top: 11px; font-size: 14px; color: var(--muted); }
.footer { color: var(--muted); font: 12px var(--mono); }
@media (max-width: 700px) {
  .wrap { width: calc(100% - 30px); }
  .hero, .experiment { grid-template-columns: 1fr; }
  .hero { padding-block: 34px 26px; }
  .instrument { max-width: 410px; }
  .experiment { gap: 12px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }