:root {
  --ivory: #faf7f0;
  --paper: #ffffff;
  --navy: #0b1f3a;
  --navy-soft: #3a4a63;
  --rule: #d9d4c7;
  --coral: #e5533d;
  --coral-ink: #b8321f; /* coral for small text: 5.4:1 on ivory */
  --serif: "Iowan Old Style", "Charter", "Source Serif 4", "Georgia", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ivory); color: var(--navy); font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
.wrap { width: min(1160px, 100% - 48px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 0; background: var(--navy); color: #fff; padding: 8px 14px; z-index: 10; }
.skip:focus { left: 8px; top: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
a { color: var(--navy); text-decoration-color: var(--coral); text-underline-offset: 3px; text-decoration-thickness: 2px; }
a:hover { color: var(--coral-ink); }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }

.masthead { border-bottom: 1px solid var(--navy); }
.masthead-row { display: flex; justify-content: space-between; align-items: baseline; padding: 18px 0; gap: 16px; flex-wrap: wrap; }
.wordmark { font: 700 26px/1 var(--serif); letter-spacing: -0.01em; text-decoration: none; }
.wordmark span { color: var(--coral); }
nav a { margin-left: 24px; font-size: 14px; text-decoration: none; letter-spacing: 0.04em; text-transform: uppercase; font-weight: 500; }
nav a:hover { text-decoration: underline; }

.kicker { font: 600 12px/1 var(--sans); letter-spacing: 0.14em; text-transform: uppercase; color: var(--coral-ink); margin: 0 0 14px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(38px, 5.4vw, 66px); line-height: 1.04; margin-bottom: 24px; }
h1 em { font-style: italic; color: var(--coral); }
h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.1; margin-bottom: 12px; }
h3 { font-size: 22px; margin-bottom: 6px; }
.lede { font-size: 19px; color: var(--navy-soft); max-width: 36em; margin: 0 0 28px; }
.muted { color: var(--navy-soft); max-width: 40em; }
.fine { font-size: 13.5px; color: var(--navy-soft); }

.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 56px; align-items: center; padding: 64px 0 80px; }
.samples { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.samples button { font: 500 14px var(--sans); padding: 9px 16px; border: 1px solid var(--navy); background: transparent; color: var(--navy); border-radius: 999px; cursor: pointer; }
.samples button[aria-selected="true"] { background: var(--navy); color: #fff; }
.samples button:hover:not([aria-selected="true"]) { border-color: var(--coral); color: var(--coral-ink); }
.notice { border-left: 3px solid var(--coral); padding: 4px 0 4px 14px; font-size: 14.5px; margin: 20px 0 0; }

.wheel-figure { margin: 0; }
.wheel svg { width: 100%; height: auto; display: block; }
.wheel text { font-family: var(--sans); }

.band { background: var(--paper); border-block: 1px solid var(--rule); padding: 72px 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; }
.table-scroll { overflow-x: auto; margin-top: 18px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; font-variant-numeric: tabular-nums; }
th { text-align: left; font: 600 11.5px var(--sans); letter-spacing: 0.1em; text-transform: uppercase; color: var(--navy-soft); border-bottom: 1px solid var(--navy); padding: 8px 10px 8px 0; }
td { padding: 8px 10px 8px 0; border-bottom: 1px solid var(--rule); }
td.glyph { font-size: 18px; width: 1.6em; }
.flag { color: var(--coral-ink); font-weight: 600; }
.unknown { color: var(--navy-soft); font-style: italic; }

.layers { padding: 88px 0; }
.layer-list { list-style: none; padding: 0; margin: 36px 0 0; display: grid; gap: 0; border-top: 1px solid var(--navy); }
.layer-list li { display: grid; grid-template-columns: 72px 1fr; gap: 16px; padding: 28px 0; border-bottom: 1px solid var(--rule); max-width: 52em; }
.num { font: 600 44px/1 var(--serif); color: var(--coral); }
.layer-list p { margin: 0; color: var(--navy-soft); }
.tag { font: 600 11px var(--sans); letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid var(--coral-ink); color: var(--coral-ink); padding: 2px 8px; border-radius: 999px; vertical-align: middle; margin-left: 6px; }

.entries { list-style: none; padding: 0; margin: 26px 0 0; columns: 2 320px; column-gap: 48px; }
.entries li { break-inside: avoid; padding: 10px 0; border-bottom: 1px solid var(--rule); font-size: 15.5px; }
.entries li small { display: block; color: var(--navy-soft); font-size: 12px; letter-spacing: 0.04em; }
.link-button { background: none; border: 0; padding: 0; font: inherit; color: var(--navy); text-decoration: underline var(--coral) 2px; text-underline-offset: 3px; cursor: pointer; }

.disclaimer { padding: 80px 0; }
.disclaimer .grid-2 p { margin: 0; padding-top: 14px; border-top: 3px solid var(--navy); }

.method { margin: 28px 0 0; display: grid; gap: 0; max-width: 52em; }
.method div { display: grid; grid-template-columns: 180px 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
.method dt { font: 600 12px var(--sans); letter-spacing: 0.1em; text-transform: uppercase; color: var(--navy-soft); padding-top: 4px; }
.method dd { margin: 0; }

.footer { background: var(--navy); color: #e8e4da; padding: 40px 0 56px; font-size: 15px; }
.footer a { color: #fff; }
.footer .fine { color: #b9c0cc; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding: 40px 0 56px; }
  .grid-2 { grid-template-columns: 1fr; gap: 36px; }
  .band { padding: 52px 0; }
  .method div { grid-template-columns: 1fr; gap: 2px; }
  nav a { margin-left: 16px; }
}
@media (max-width: 480px) { .wrap { width: calc(100% - 32px); } body { font-size: 16px; } .layer-list li { grid-template-columns: 48px 1fr; } .num { font-size: 32px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }