:root {
  color-scheme: dark;
  --ink: #f4f0e7;
  --muted: #a9a49a;
  --quiet: #77736c;
  --paper: #11110f;
  --panel: #181815;
  --panel-2: #20201c;
  --line: #35342e;
  --acid: #d9ff57;
  --blue: #7bd9ff;
  --amber: #ffc76a;
  --red: #ff8e7d;
  --green: #8fe3a8;
  --radius: 18px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 5%, rgb(217 255 87 / 8%), transparent 30rem),
    linear-gradient(180deg, #151511 0, var(--paper) 36rem);
  color: var(--ink);
  min-width: 300px;
}

button, select, input { font: inherit; }
button, select { color: inherit; }
a { color: inherit; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: .75rem 1rem;
  background: var(--acid);
  color: #111;
  clip-path: inset(50%);
  height: 1px;
  width: 1px;
  overflow: hidden;
  white-space: nowrap;
  transform: translateY(-200%);
}
.skip-link:focus {
  clip-path: none;
  height: auto;
  width: auto;
  overflow: visible;
  transform: translateY(0);
}

.site-header, main, footer { width: min(1180px, calc(100% - 2.5rem)); margin-inline: auto; }
.site-header {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; gap: .7rem; align-items: center; text-decoration: none; letter-spacing: -.02em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--acid);
  border-radius: 50%;
  color: var(--acid);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.brand strong { color: var(--acid); font-weight: 650; }
.header-note { color: var(--quiet); font-size: .85rem; }

.hero {
  min-height: 440px;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(290px, .7fr);
  gap: 5rem;
  align-items: center;
  padding-block: 6rem 4.5rem;
}
.eyebrow {
  margin: 0 0 .75rem;
  color: var(--acid);
  font: 600 .72rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .13em;
  text-transform: uppercase;
}
h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; font-size: clamp(3rem, 7vw, 6.5rem); line-height: .91; letter-spacing: -.07em; font-weight: 600; }
h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.65rem); line-height: 1; letter-spacing: -.045em; }
h3 { letter-spacing: -.025em; }
.lede { max-width: 720px; margin: 2rem 0 0; color: var(--muted); font-size: clamp(1rem, 1.8vw, 1.25rem); line-height: 1.6; }
.catalog-stats { margin: 0; border-top: 1px solid var(--line); }
.catalog-stats div { display: grid; grid-template-columns: 1fr auto; gap: 1rem; padding: 1.15rem 0; border-bottom: 1px solid var(--line); }
.catalog-stats dt { color: var(--muted); }
.catalog-stats dd { margin: 0; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.fixture-banner { margin-bottom: 1rem; padding: .9rem 1.1rem; border: 1px solid var(--amber); background: rgb(255 199 106 / 8%); color: var(--amber); border-radius: 12px; }
.authority-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  margin-bottom: 5rem;
  padding: 1.4rem;
  border: 1px solid var(--blue);
  border-radius: var(--radius);
  background: rgb(123 217 255 / 5%);
}
.authority-icon { color: var(--blue); font-size: 2rem; line-height: 1; }
.authority-note h2 { font-size: 1.1rem; letter-spacing: -.015em; }
.authority-note p { margin: .5rem 0 0; color: var(--muted); line-height: 1.55; max-width: 920px; }

.compare-shell { padding-block: 2rem 6rem; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; }
.toggle { display: flex; align-items: center; gap: .65rem; color: var(--muted); cursor: pointer; }
.toggle input { width: 1.15rem; height: 1.15rem; accent-color: var(--acid); }
.selectors { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: end; margin: 2.2rem 0 1.2rem; }
.selectors label { display: grid; gap: .55rem; color: var(--muted); font-size: .8rem; }
select {
  width: 100%;
  padding: .95rem 2.5rem .95rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
select:focus-visible, button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.versus { padding-bottom: 1rem; color: var(--quiet); font: .75rem ui-monospace, monospace; text-transform: uppercase; }

.comparison-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
.preset-card { min-width: 0; padding: clamp(1.2rem, 3vw, 2rem); border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.card-top { display: flex; align-items: start; justify-content: space-between; gap: 1rem; }
.card-top h3 { margin: .2rem 0 0; font-size: clamp(1.45rem, 3vw, 2.1rem); }
.binding-name { color: var(--muted); font-family: ui-monospace, monospace; font-size: .82rem; }
.badge { display: inline-flex; align-items: center; gap: .4rem; padding: .35rem .55rem; border: 1px solid currentColor; border-radius: 999px; font: 600 .68rem ui-monospace, monospace; text-transform: uppercase; letter-spacing: .06em; }
.badge::before { content: "●"; font-size: .55rem; }
.status-recommended { color: var(--acid); }
.status-verified { color: var(--blue); }
.status-stale, .status-deprecated { color: var(--amber); }
.status-experimental, .status-unverified { color: var(--muted); }
.meta-line { color: var(--quiet); font: .75rem/1.5 ui-monospace, monospace; }

.metric-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: 1.5rem 0; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--line); }
.metric { padding: 1rem; background: var(--panel-2); }
.metric span { display: block; color: var(--quiet); font-size: .72rem; margin-bottom: .4rem; }
.metric strong { font: 500 1.15rem ui-monospace, monospace; }
.card-section { padding: 1.25rem 0; border-top: 1px solid var(--line); }
.card-section h4 { margin: 0 0 .9rem; font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.enforcement-list { display: grid; gap: .7rem; margin: 0; }
.enforcement-list div { display: grid; grid-template-columns: minmax(120px, .45fr) 1fr; gap: 1rem; }
.enforcement-list dt { font-size: .82rem; }
.enforcement-list dd { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.45; }
.compatibility-list { display: grid; gap: .7rem; margin: 0; }
.compatibility-list div { display: grid; grid-template-columns: minmax(120px, .45fr) 1fr; gap: 1rem; }
.compatibility-list dt { font-size: .82rem; }
.compatibility-list dd { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.45; }
.state { display: inline-block; margin-left: .35rem; color: var(--blue); font: .65rem ui-monospace, monospace; text-transform: uppercase; }
.hash { overflow-wrap: anywhere; color: var(--quiet); font: .7rem/1.5 ui-monospace, monospace; }
.command-block { display: grid; gap: .75rem; }
.command-block code { display: block; overflow-x: auto; padding: 1rem; border-radius: 10px; background: #0b0b09; color: var(--acid); font: .75rem/1.5 ui-monospace, monospace; }
.copy-button { justify-self: start; padding: .7rem .95rem; border: 1px solid var(--acid); border-radius: 9px; background: transparent; color: var(--acid); cursor: pointer; }
.copy-button:hover { background: var(--acid); color: #111; }

.empty-state { padding: 3rem; border: 1px dashed var(--line); border-radius: var(--radius); background: var(--panel); }
.empty-state h3 { margin: .25rem 0 .75rem; font-size: 1.6rem; }
.empty-state p:not(.eyebrow) { color: var(--muted); }
.empty-state code { color: var(--acid); overflow-wrap: anywhere; }

.legend { display: grid; grid-template-columns: .65fr 1.35fr; gap: 5rem; padding: 5rem 0; border-top: 1px solid var(--line); }
.legend dl { margin: 0; }
.legend dl div { display: grid; grid-template-columns: 140px 1fr; gap: 1rem; padding: .8rem 0; border-bottom: 1px solid var(--line); }
.legend dt { font-weight: 650; }
.legend dd { margin: 0; color: var(--muted); line-height: 1.5; }
footer { display: flex; justify-content: space-between; gap: 2rem; padding: 2.5rem 0 4rem; border-top: 1px solid var(--line); color: var(--quiet); font-size: .78rem; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 760px) {
  .site-header, main, footer { width: min(100% - 1.4rem, 1180px); }
  .header-note { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 3rem; padding-block: 4rem 3rem; }
  h1 { font-size: clamp(3rem, 16vw, 5.5rem); }
  .authority-note { margin-bottom: 3rem; }
  .section-heading { align-items: start; flex-direction: column; }
  .selectors { grid-template-columns: 1fr; }
  .versus { display: none; }
  .comparison-grid { grid-template-columns: 1fr; }
  .legend { grid-template-columns: 1fr; gap: 2rem; }
  .legend dl div { grid-template-columns: 110px 1fr; }
  footer { flex-direction: column; }
}

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