:root {
  color-scheme: dark;
  --bg: #11151a;
  --panel: #191e24;
  --ink: #eef0ed;
  --muted: #a4adb8;
  --line: #30363e;
  --accent: #d3ef91;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.65; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
.skip-link { position: absolute; top: -100px; left: 20px; padding: 10px 16px; background: var(--panel); z-index: 2; }
.skip-link:focus { top: 12px; }
.page { max-width: 1140px; margin: auto; padding: 0 48px; }
header { height: 100px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 13px; font: 13px "SFMono-Regular", Consolas, "Liberation Mono", monospace; letter-spacing: -.3px; }
.brand-symbol { width: 22px; height: 24px; display: flex; align-items: flex-end; gap: 3px; }
.brand-symbol i { width: 5px; height: 9px; background: var(--accent); border-radius: 1px; }
.brand-symbol i:nth-child(2) { height: 16px; }
.brand-symbol i:nth-child(3) { height: 23px; }
.header-link { font-size: 12px; color: var(--muted); }
.header-link span { margin-left: 12px; color: var(--ink); }
.hero { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: center; gap: 25px; padding: 68px 0 64px; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 10px; letter-spacing: 1.1px; text-transform: uppercase; margin: 0; }
.eyebrow > span { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
h1 { font-size: clamp(44px, 5.5vw, 68px); letter-spacing: -3.5px; line-height: 1.06; font-weight: 500; margin: 25px 0 24px; }
h1 > span { color: var(--accent); }
.lead { font-size: 14px; line-height: 1.8; color: var(--muted); margin: 0 0 26px; }
.hero-link { display: inline-flex; align-items: center; justify-content: space-between; min-width: 200px; padding: 10px 0; border-bottom: 1px solid #606b55; color: var(--accent); font-size: 12px; }
.hero-link span { font-size: 20px; line-height: 1; }
.signal { position: relative; width: min(100%, 300px); aspect-ratio: 1; justify-self: end; display: grid; place-items: center; }
.signal-ring { position: absolute; border: 1px solid #303a30; border-radius: 50%; }
.ring-outer { inset: 0; border-style: dashed; }
.ring-middle { inset: 15%; border-color: #40503a; }
.ring-inner { inset: 30%; border-color: #687d4f; background: #1c241e; }
.signal-core { position: relative; font: italic 52px Georgia, serif; color: var(--accent); line-height: 1; margin-bottom: 5px; }
.signal-label { position: absolute; bottom: -28px; font: 8px "SFMono-Regular", Consolas, monospace; letter-spacing: 2.1px; color: var(--muted); }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; border-top: 1px solid var(--line); padding: 23px 0; }
.section-heading h2 { margin: 0; font-size: 14px; font-weight: 500; }
.section-heading > span { font: 9px "SFMono-Regular", Consolas, monospace; letter-spacing: 1px; color: var(--muted); white-space: nowrap; }
.notice { display: flex; align-items: flex-start; gap: 17px; padding: 24px; border: 1px solid #3b4931; background: #1d241c; border-radius: 5px; }
.notice-dot { width: 8px; height: 8px; border: 1px solid var(--accent); border-radius: 50%; flex: 0 0 8px; margin-top: 6px; }
.notice h3 { color: var(--accent); font-size: 14px; font-weight: 500; margin: 0 0 6px; }
.notice p { color: #b4beae; font-size: 12px; max-width: 560px; margin: 0; }
.notice-mark { margin-left: auto; color: #b6c6a4; }
.facts { margin: 12px 0 36px; }
.facts > div { display: flex; justify-content: space-between; gap: 22px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 12px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; text-align: right; }
.reference-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 27px; }
.reference article { padding: 0 0 26px; }
.step { display: block; font: 10px "SFMono-Regular", Consolas, monospace; color: var(--accent); margin-bottom: 14px; }
.reference h3 { margin: 0 0 9px; font-size: 15px; font-weight: 500; letter-spacing: -.2px; }
.reference p { color: var(--muted); font-size: 12px; margin: 0; }
.footnote { color: var(--muted); font-size: 11px; line-height: 1.8; background: var(--panel); border-radius: 4px; padding: 18px 22px; margin: 10px 0 40px; }
footer { border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 25px 0 30px; color: var(--muted); font-size: 9px; }
footer > span:first-child { font: 10px "SFMono-Regular", Consolas, monospace; color: var(--ink); }
footer b { margin: 0 6px; font-weight: 400; }
footer > a { color: var(--ink); font-size: 18px; }
@media (max-width: 800px) {
  .page { padding-inline: 30px; }
  .hero { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 16px; padding-block: 50px; }
  h1 { font-size: 54px; letter-spacing: -2.6px; }
  .signal-core { font-size: 38px; }
  .signal-label { font-size: 7px; letter-spacing: 1px; }
  .desktop-break { display: none; }
}
@media (max-width: 560px) {
  .page { padding-inline: 22px; }
  header { height: 80px; }
  .hero { display: block; padding: 38px 0 36px; }
  h1 { font-size: 54px; }
  .signal { display: none; }
  .lead { font-size: 13px; max-width: 330px; }
  .eyebrow { font-size: 9px; }
  .section-heading > span { font-size: 8px; letter-spacing: .4px; }
  .notice { padding: 20px 17px; gap: 13px; }
  .notice-mark { display: none; }
  .facts > div { font-size: 11px; gap: 12px; }
  .reference-grid { grid-template-columns: 1fr; gap: 0; }
  .reference article { display: grid; grid-template-columns: 25px minmax(0, 1fr); gap: 0 12px; }
  .step { grid-row: span 2; margin: 5px 0 0; }
  .reference p { grid-column: 2; }
  .footnote { padding: 16px 18px; margin-top: 0; }
  footer { flex-wrap: wrap; font-size: 8px; gap: 12px; }
  footer > span:nth-child(2) { order: 1; flex-basis: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}