:root {
  color-scheme: dark;
  --bg: #061220;
  --surface: #0d1c2d;
  --surface-2: #122842;
  --line: #27445e;
  --text: #f5f8fc;
  --muted: #aabbd0;
  --cyan: #43c5f5;
  --green: #32d29b;
  --yellow: #ffd05b;
  --red: #ff5b72;
  --violet: #d15af5;
  --shadow: 0 22px 60px rgba(0, 0, 0, .32);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: radial-gradient(circle at 70% -20%, #153451 0, transparent 34%), var(--bg); color: var(--text); font: 17px/1.58 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--cyan); }
img { display: block; }
.shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 99; padding: 12px 18px; background: white; color: #061220; border-radius: 8px; }
.skip-link:focus { top: 16px; }
.site-header { position: sticky; top: 0; z-index: 20; min-height: 76px; padding: 13px max(20px, calc((100vw - 1160px) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 20px; background: rgba(6, 18, 32, .88); border-bottom: 1px solid rgba(92, 133, 166, .25); backdrop-filter: blur(14px); }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; font-size: 19px; letter-spacing: .01em; }
.brand strong { color: var(--cyan); }
.site-header nav { display: flex; flex-wrap: wrap; gap: 22px; }
.site-header nav a { color: var(--muted); text-decoration: none; font-weight: 700; font-size: 14px; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: white; }
.hero { min-height: 680px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 80px; align-items: center; padding-block: 84px; }
.eyebrow { margin: 0 0 14px; color: #77d8fb; font-size: 13px; font-weight: 900; letter-spacing: .16em; }
.status { display: inline-flex; align-items: center; gap: 9px; padding: 7px 12px; color: #bdeee0; border: 1px solid rgba(50, 210, 155, .36); background: rgba(50, 210, 155, .08); border-radius: 999px; font-size: 13px; font-weight: 800; }
.status span { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 15px var(--green); }
h1 { margin: 24px 0 20px; max-width: 850px; font-size: clamp(42px, 6vw, 72px); line-height: 1.04; letter-spacing: -.045em; }
h2 { margin: 0 0 14px; font-size: clamp(30px, 4vw, 44px); line-height: 1.13; letter-spacing: -.025em; }
h3 { margin: 10px 0 7px; font-size: 21px; line-height: 1.2; }
.lead { max-width: 700px; color: #c4d2e2; font-size: 21px; }
.small { max-width: 620px; color: var(--muted); font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 14px; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; padding: 12px 20px; border: 1px solid var(--line); border-radius: 13px; text-decoration: none; font: inherit; font-weight: 850; cursor: pointer; }
.button.primary { border-color: #43c5f5; background: var(--cyan); color: #061220; }
.button.primary:disabled { opacity: .6; cursor: not-allowed; }
.button.secondary { background: #10233a; color: white; }
.radar-card { position: relative; aspect-ratio: 1; overflow: hidden; border: 1px solid #34526d; border-radius: 50%; background: radial-gradient(circle, rgba(31, 62, 89, .25), rgba(6, 18, 32, .96) 68%), repeating-radial-gradient(circle, transparent 0 62px, rgba(85, 140, 179, .15) 63px 64px); box-shadow: var(--shadow), inset 0 0 50px rgba(67, 197, 245, .08); }
.radar-card::before, .radar-card::after { content: ""; position: absolute; background: rgba(87, 141, 180, .13); }
.radar-card::before { width: 1px; height: 100%; left: 50%; }
.radar-card::after { height: 1px; width: 100%; top: 50%; }
.range { position: absolute; left: 50%; top: 50%; border: 1px dashed; border-radius: 50%; transform: translate(-50%, -50%); }
.range-20 { width: 84%; height: 84%; border-color: rgba(50, 210, 155, .45); }
.range-10 { width: 48%; height: 48%; border-color: rgba(255, 208, 91, .6); }
.range-1 { width: 16%; height: 16%; border-color: rgba(255, 91, 114, .8); }
.site-dot { position: absolute; left: 50%; top: 50%; width: 32px; height: 32px; border: 8px solid white; background: var(--cyan); border-radius: 50%; transform: translate(-50%, -50%); box-shadow: 0 0 0 8px rgba(67, 197, 245, .16); }
.cell { position: absolute; display: grid; place-items: center; width: 58px; height: 58px; border-radius: 50%; }
.cell span { width: 28px; height: 28px; border-radius: 45% 55% 40% 60%; background: currentColor; filter: blur(1px); box-shadow: 0 0 20px currentColor; }
.cell-a { left: 13%; top: 64%; color: var(--red); border: 3px solid var(--red); }
.cell-b { right: 16%; top: 18%; color: var(--yellow); border: 3px solid var(--yellow); }
.track { position: absolute; display: flex; gap: 24px; transform-origin: left center; }
.track i { width: 9px; height: 9px; border-radius: 50%; background: currentColor; box-shadow: 0 0 12px currentColor; }
.track-a { left: 23%; top: 66%; color: var(--red); transform: rotate(-21deg); }
.track-b { right: 22%; top: 30%; color: var(--yellow); transform: rotate(140deg); }
.radar-label { position: absolute; left: 50%; bottom: 7%; transform: translateX(-50%); padding: 6px 10px; background: rgba(3, 11, 20, .75); border-radius: 6px; color: #d8e8f5; font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.section { padding-block: 86px; }
.section-heading { max-width: 820px; margin-bottom: 34px; }
.section-heading p:not(.eyebrow), .split > div > p:not(.eyebrow), .version-card p { color: var(--muted); }
.narrow { max-width: 740px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-grid article { min-height: 210px; padding: 25px; background: linear-gradient(145deg, rgba(18, 40, 66, .94), rgba(10, 27, 45, .94)); border: 1px solid #27445e; border-radius: 20px; }
.feature-grid p { margin: 0; color: var(--muted); }
.feature-icon { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: rgba(67, 197, 245, .13); color: var(--cyan); font-weight: 900; }
.levels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.level { padding: 24px; background: var(--surface); border: 1px solid var(--line); border-top-width: 4px; border-radius: 20px; }
.level p { margin-bottom: 0; color: var(--muted); }
.level.green { border-top-color: var(--green); }
.level.yellow { border-top-color: var(--yellow); }
.level.red { border-top-color: var(--red); }
.level-tag { font-size: 13px; font-weight: 950; letter-spacing: .08em; }
.green .level-tag { color: var(--green); }.yellow .level-tag { color: var(--yellow); }.red .level-tag { color: var(--red); }
.split { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.event-list { margin: 0; padding: 0; list-style: none; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.event-list li { display: grid; grid-template-columns: 150px 1fr; gap: 18px; padding: 18px 22px; background: rgba(13, 28, 45, .78); border-bottom: 1px solid var(--line); }
.event-list li:last-child { border: 0; }
.event-list span { color: var(--muted); }
.version-card { display: grid; grid-template-columns: 1.3fr .7fr; gap: 50px; padding: 34px; background: linear-gradient(135deg, #102741, #0b1b2d); border: 1px solid #31536f; border-radius: 24px; box-shadow: var(--shadow); }
.version-card dl { margin: 0; }
.version-card dl div { padding: 12px 0; border-bottom: 1px solid var(--line); }
.version-card dt { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .08em; }
.version-card dd { margin: 4px 0 0; font-weight: 800; }
.notice { margin-block: 30px 90px; padding: 28px; background: rgba(255, 208, 91, .08); border: 1px solid rgba(255, 208, 91, .42); border-radius: 18px; }
.notice h2 { font-size: 23px; }.notice p { margin: 0; color: #e9debb; }
.site-footer { display: flex; justify-content: space-between; gap: 30px; padding-block: 32px 45px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { color: var(--muted); }
.article-page { max-width: 900px; padding-block: 72px 100px; }
.article-page h1 { font-size: clamp(40px, 6vw, 62px); }
.prose-card { margin: 22px 0; padding: 28px; background: rgba(13, 28, 45, .86); border: 1px solid var(--line); border-radius: 20px; }
.prose-card h2 { margin-top: 25px; font-size: 27px; }.prose-card h2:first-child { margin-top: 0; }
.prose-card li { margin-block: 9px; color: #cad6e4; }
.callout, .legal-warning { margin: 22px 0; padding: 17px 19px; border-radius: 13px; }
.callout { background: rgba(67, 197, 245, .08); border: 1px solid rgba(67, 197, 245, .42); }
.legal-warning { background: rgba(255, 91, 114, .10); border: 1px solid rgba(255, 91, 114, .55); color: #ffd5db; }
.check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 20px; }
.check-grid p { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line); }
.check-grid span { color: var(--cyan); }
mark { padding: 1px 5px; background: #6b2836; color: #fff; border-radius: 4px; }
code { padding: 2px 6px; color: #aee8ff; background: #071424; border-radius: 5px; }

@media (max-width: 850px) {
  .site-header { position: static; align-items: flex-start; }
  .site-header nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 40px; padding-block: 56px; }
  .radar-card { width: min(100%, 550px); margin-inline: auto; }
  .feature-grid, .levels { grid-template-columns: 1fr 1fr; }
  .split, .version-card { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .shell { width: min(100% - 28px, 1160px); }
  .site-header { min-height: 68px; padding-inline: 14px; }
  .brand { font-size: 16px; }.brand img { width: 42px; height: 42px; }
  h1 { font-size: 42px; }
  .lead { font-size: 18px; }
  .feature-grid, .levels, .check-grid { grid-template-columns: 1fr; }
  .section { padding-block: 58px; }
  .event-list li { grid-template-columns: 1fr; gap: 3px; }
  .site-footer { flex-direction: column; }
  .actions .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}