:root {
  --graphite-00: #090d0c;
  --graphite-10: #0d1311;
  --graphite-20: #121a17;
  --graphite-30: #18231f;
  --pcb-deep: #123d2d;
  --pcb: #1c6b4b;
  --mint: #83e6b5;
  --mint-soft: #b8f3d4;
  --warm-white: #f3efe5;
  --text-secondary: #c6cec7;
  --text-tertiary: #8fa098;
  --text-muted: #66766f;
  --warning: #e4c77a;
  --error: #de8e83;
  --line: rgba(131, 230, 181, 0.17);
  --line-soft: rgba(243, 239, 229, 0.08);
  --line-strong: rgba(131, 230, 181, 0.48);
  --focus: #b8f3d4;
  --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --step: 4px;
  --wrap: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--warm-white);
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,.012) 0, rgba(255,255,255,.012) 1px, transparent 1px, transparent 4px),
    var(--graphite-00);
  font-family: var(--sans);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 82% 8%, rgba(28, 107, 75, .13), transparent 32rem);
}

img { display: block; max-width: 100%; }
a { color: inherit; }
a:hover { color: var(--mint); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 99;
  padding: 8px 12px;
  background: var(--mint);
  color: var(--graphite-00);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.shell { width: min(calc(100% - 40px), var(--wrap)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(9, 13, 12, .94);
  backdrop-filter: blur(16px);
}

.topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-block: 8px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-tertiary);
  font: 700 10px/1.4 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.status { color: var(--mint); }
.status::before { content: "●"; margin-right: 8px; }

.nav-row { display: flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 76px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font: 700 17px/1 var(--mono); letter-spacing: -.03em; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--line-strong); color: var(--mint); background: var(--graphite-20); }
.brand-domain { color: var(--text-tertiary); font-size: 11px; letter-spacing: .08em; }
.nav-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 24px; }
.nav-links a { color: var(--text-secondary); font: 700 11px/1.4 var(--mono); letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.nav-links a::before { content: "./"; color: var(--pcb); }
.nav-links a:hover { color: var(--mint); }

main { overflow: hidden; }
.section { padding-block: 96px; border-bottom: 1px solid var(--line-soft); scroll-margin-top: 100px; }
.section-tight { padding-block: 56px; }
.eyebrow { margin: 0 0 16px; color: var(--mint); font: 700 11px/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: "["; color: var(--text-muted); }
.eyebrow::after { content: "]"; color: var(--text-muted); }
h1, h2, h3 { margin: 0; line-height: 1.08; text-wrap: balance; }
h1 { max-width: 900px; font-size: clamp(42px, 7vw, 86px); font-weight: 760; letter-spacing: -.055em; }
h2 { max-width: 760px; font-size: clamp(32px, 4.8vw, 58px); letter-spacing: -.045em; }
h3 { font-size: 20px; letter-spacing: -.02em; }
p { margin: 0; color: var(--text-secondary); }
.lead { max-width: 760px; font-size: clamp(18px, 2.1vw, 23px); line-height: 1.55; color: var(--text-secondary); }
.muted { color: var(--text-tertiary); }
.mono { font-family: var(--mono); }

.hero { padding-top: 72px; }
.hero-head { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 64px; align-items: end; }
.hero-head > * { min-width: 0; }
.hero-meta { border-left: 1px solid var(--line); padding-left: 20px; }
.hero-meta dt { color: var(--text-muted); font: 700 10px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.hero-meta dd { margin: 2px 0 16px; color: var(--mint-soft); font: 700 14px/1.4 var(--mono); }
.hero .lead { width: 100%; max-width: 100%; min-width: 0; margin-top: 28px; }
.hero-visual { position: relative; margin: 48px 0 0; border: 1px solid var(--line); background: var(--graphite-10); }
.hero-visual img { width: 100%; height: clamp(330px, 52vw, 610px); object-fit: cover; object-position: center; filter: saturate(.82) contrast(1.04); }
.hero-visual::after { content: "CAPTURE_01 // FRAME-TIME MONITOR"; position: absolute; left: 0; bottom: 0; padding: 8px 12px; color: var(--mint-soft); background: rgba(9,13,12,.86); font: 700 10px/1.4 var(--mono); letter-spacing: .08em; }
.stat-rail { display: grid; grid-template-columns: repeat(4, 1fr); border-inline: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat { min-height: 116px; padding: 20px; background: var(--graphite-10); border-right: 1px solid var(--line-soft); }
.stat:last-child { border-right: 0; }
.stat-label { display: block; color: var(--text-tertiary); font: 700 10px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.stat-value { display: block; margin-top: 12px; color: var(--warm-white); font: 700 clamp(22px, 3vw, 34px)/1 var(--mono); font-variant-numeric: tabular-nums; }
.stat-note { display: block; margin-top: 8px; color: var(--text-muted); font-size: 12px; }

.section-head { display: flex; align-items: end; justify-content: space-between; gap: 48px; margin-bottom: 48px; }
.section-index { color: var(--text-muted); font: 700 12px/1 var(--mono); }
.cards { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.news-card { grid-column: span 4; min-height: 320px; padding: 28px; border: 1px solid var(--line); background: var(--graphite-10); }
.news-card:first-child { grid-column: span 6; }
.news-card:nth-child(2) { grid-column: span 6; }
.card-kicker { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 48px; color: var(--mint); font: 700 10px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.news-card p { margin-top: 16px; }
.card-foot { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--line-soft); color: var(--text-tertiary); font: 700 10px/1.4 var(--mono); letter-spacing: .06em; }

.explain-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.explain-copy { position: sticky; top: 124px; }
.explain-copy .lead { margin-top: 24px; }
.settings-list { counter-reset: setting; border-top: 1px solid var(--line); }
.setting { counter-increment: setting; display: grid; grid-template-columns: 72px 1fr auto; gap: 20px; align-items: start; padding: 24px 0; border-bottom: 1px solid var(--line-soft); }
.setting::before { content: "0" counter(setting); color: var(--text-muted); font: 700 12px/1.5 var(--mono); }
.setting p { margin-top: 8px; font-size: 14px; }
.impact { padding: 4px 8px; border: 1px solid var(--line); color: var(--mint-soft); font: 700 10px/1.4 var(--mono); white-space: nowrap; }
.figure { margin: 48px 0 0; border: 1px solid var(--line); }
.figure img { width: 100%; aspect-ratio: 16/8; object-fit: cover; object-position: center; }
.figure figcaption { padding: 12px 16px; color: var(--text-tertiary); background: var(--graphite-10); font: 700 10px/1.5 var(--mono); letter-spacing: .05em; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); }
table { width: 100%; min-width: 760px; border-collapse: collapse; background: var(--graphite-10); }
caption { padding: 16px 20px; color: var(--text-tertiary); text-align: left; font: 700 11px/1.5 var(--mono); }
th, td { padding: 18px 20px; border-top: 1px solid var(--line-soft); text-align: left; }
th { color: var(--text-tertiary); font: 700 10px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
td { color: var(--text-secondary); }
td:nth-child(n+3) { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.fps { color: var(--mint-soft); }
.framebar { width: 110px; height: 6px; margin-top: 8px; background: var(--graphite-30); }
.framebar span { display: block; height: 100%; width: var(--value); background: var(--mint); }
.table-note { margin-top: 16px; color: var(--text-tertiary); font-size: 13px; }

.check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.checklist { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); background: var(--graphite-10); }
.checklist li { position: relative; padding: 20px 20px 20px 56px; border-bottom: 1px solid var(--line-soft); color: var(--text-secondary); }
.checklist li:last-child { border-bottom: 0; }
.checklist li::before { content: "✓"; position: absolute; left: 20px; top: 20px; color: var(--mint); font: 700 14px/1.6 var(--mono); }
.warning-panel { padding: 32px; border: 1px solid rgba(228,199,122,.28); background: var(--graphite-10); }
.warning-panel .eyebrow { color: var(--warning); }
.code-block { margin-top: 24px; padding: 20px; overflow-x: auto; border: 1px solid var(--line-soft); background: var(--graphite-00); color: var(--mint-soft); font: 13px/1.8 var(--mono); white-space: pre; }

.kb { display: grid; grid-template-columns: 280px 1fr; gap: 48px; }
.kb-nav { border-top: 1px solid var(--line); }
.kb-nav a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line-soft); color: var(--text-tertiary); font: 700 11px/1.4 var(--mono); text-decoration: none; }
.kb-nav a:hover { color: var(--mint); }
.kb-list details { border-top: 1px solid var(--line); background: var(--graphite-10); }
.kb-list details:last-child { border-bottom: 1px solid var(--line); }
.kb-list summary { position: relative; padding: 24px 56px 24px 24px; cursor: pointer; color: var(--warm-white); font-weight: 750; list-style: none; }
.kb-list summary::-webkit-details-marker { display: none; }
.kb-list summary::after { content: "+"; position: absolute; right: 24px; color: var(--mint); font: 700 20px/1 var(--mono); }
.kb-list details[open] summary::after { content: "−"; }
.kb-answer { padding: 0 24px 24px; }
.kb-answer ol { margin: 16px 0 0; padding-left: 20px; color: var(--text-secondary); }
.kb-answer code { color: var(--mint-soft); font-family: var(--mono); }

.peripheral-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 16px; }
.peripheral-copy { padding: 36px; border: 1px solid var(--line); background: var(--graphite-10); }
.peripheral-copy .lead { margin-top: 20px; }
.hardware-list { margin: 32px 0 0; padding: 0; list-style: none; }
.hardware-list li { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 16px 0; border-top: 1px solid var(--line-soft); color: var(--text-secondary); }
.hardware-list strong { color: var(--mint-soft); font: 700 11px/1.5 var(--mono); }
.peripheral-figure { margin: 0; border: 1px solid var(--line); background: var(--graphite-10); }
.peripheral-figure img { width: 100%; height: 100%; min-height: 480px; object-fit: cover; object-position: center; }
.disclosure { margin-top: 20px; color: var(--text-tertiary); font-size: 13px; }

.rec-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 56px; border: 1px solid var(--line); background: var(--line-soft); }
.rec { padding: 24px; background: var(--graphite-10); }
.rec strong { display: block; color: var(--warm-white); }
.rec span { color: var(--text-tertiary); font: 700 11px/1.5 var(--mono); }
.rec p { margin-top: 12px; font-size: 14px; }

.site-footer { padding-block: 48px; background: var(--graphite-10); }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: end; }
.footer-copy { max-width: 600px; margin-top: 16px; color: var(--text-tertiary); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 24px; }
.footer-links a { color: var(--text-secondary); font: 700 11px/1.4 var(--mono); text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line-soft); color: var(--text-muted); font: 700 10px/1.5 var(--mono); }

.legal { max-width: 860px; padding-block: 72px 104px; }
.legal h1 { font-size: clamp(40px, 6vw, 70px); }
.legal-intro { margin: 28px 0 48px; font-size: 20px; }
.legal section { padding-top: 32px; margin-top: 32px; border-top: 1px solid var(--line-soft); }
.legal h2 { font-size: 26px; }
.legal p, .legal li { color: var(--text-secondary); }
.legal p { margin-top: 16px; }
.legal ul { padding-left: 22px; }

@media (max-width: 900px) {
  .nav-row { align-items: flex-start; flex-direction: column; padding-block: 18px; gap: 18px; }
  .nav-links { justify-content: flex-start; }
  .hero-head, .explain-grid, .kb, .peripheral-grid { grid-template-columns: 1fr; }
  .hero-meta, .explain-copy { position: static; }
  .hero-meta { display: grid; grid-template-columns: repeat(3, 1fr); border-left: 0; border-top: 1px solid var(--line); padding: 20px 0 0; }
  .stat-rail { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line-soft); }
  .news-card, .news-card:first-child, .news-card:nth-child(2) { grid-column: span 6; }
  .check-grid { grid-template-columns: 1fr; }
  .peripheral-figure img { min-height: 420px; }
}

@media (max-width: 640px) {
  .shell { width: min(calc(100% - 24px), var(--wrap)); }
  .topline span:last-child { display: none; }
  .nav-links { gap: 10px 16px; }
  .section { padding-block: 68px; }
  .hero { padding-top: 48px; }
  .hero-head { gap: 32px; }
  .hero-meta { grid-template-columns: 1fr; }
  .hero-visual { margin-top: 32px; }
  .hero .lead { overflow-wrap: break-word; }
  .hero-visual img { height: 360px; }
  .stat { min-height: 104px; padding: 16px; }
  .section-head { align-items: flex-start; flex-direction: column; gap: 20px; }
  .news-card, .news-card:first-child, .news-card:nth-child(2) { grid-column: 1 / -1; min-height: auto; }
  .card-kicker { margin-bottom: 28px; }
  .setting { grid-template-columns: 40px 1fr; }
  .setting .impact { grid-column: 2; justify-self: start; }
  .figure img { aspect-ratio: 4/3; }
  .hardware-list li { grid-template-columns: 1fr; gap: 6px; }
  .peripheral-copy { padding: 24px; }
  .peripheral-figure img { min-height: 360px; }
  .rec-strip { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}