:root {
  color-scheme: dark;
  --graphite: #10161a;
  --lift: #1b2328;
  --steel: #2d3a42;
  --line: #4c575b;
  --bone: #f4e8d2;
  --muted: #b7bcb8;
  --copper: #c17846;
  --amber: #f2b84b;
  --sea: #70a79a;
  --danger: #d3694e;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--graphite); }
body { margin: 0; background: var(--graphite); color: var(--bone); font-family: Inter, Avenir, "Segoe UI", sans-serif; line-height: 1.65; }
a { color: var(--amber); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--bone); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }
.skip { position: fixed; left: 1rem; top: -10rem; background: var(--amber); color: var(--graphite); padding: .8rem 1rem; z-index: 100; }
.skip:focus { top: 1rem; }
.shell { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.site-head { position: sticky; top: 0; z-index: 30; border-bottom: 1px solid color-mix(in srgb, var(--line), transparent 25%); background: color-mix(in srgb, var(--graphite), transparent 7%); backdrop-filter: blur(16px); }
.head-row { min-height: 78px; display: flex; align-items: center; gap: 1.5rem; }
.brand { color: var(--bone); text-decoration: none; display: flex; align-items: center; gap: .8rem; font-weight: 800; letter-spacing: .035em; }
.brand img { width: 44px; height: 44px; border-radius: 11px; }
.brand span { color: var(--copper); }
nav { margin-left: auto; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .35rem .7rem; }
nav a { color: var(--muted); text-decoration: none; font-size: .86rem; padding: .35rem .15rem; border-bottom: 1px solid transparent; }
nav a[aria-current="page"] { color: var(--amber); border-color: var(--amber); }
.hero { position: relative; min-height: 620px; display: grid; align-items: end; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10,15,18,.94) 0%, rgba(10,15,18,.72) 46%, rgba(10,15,18,.12) 100%), var(--hero) center/cover no-repeat; }
.hero::after { content: ""; position: absolute; inset: 0; opacity: .18; background: repeating-linear-gradient(90deg, transparent 0 88px, var(--copper) 88px 90px); mask-image: linear-gradient(180deg, transparent, #000); }
.hero-copy { position: relative; z-index: 2; width: min(720px, 100%); padding-block: 7rem 5rem; }
.eyebrow { color: var(--amber); text-transform: uppercase; letter-spacing: .19em; font-size: .78rem; font-weight: 800; }
h1, h2, h3 { font-family: "Arial Narrow", "Avenir Next Condensed", sans-serif; line-height: .98; margin: 0; }
h1 { font-size: clamp(3.8rem, 9vw, 7.4rem); max-width: 11ch; }
h2 { font-size: clamp(2.5rem, 6vw, 5rem); max-width: 16ch; }
h3 { font-size: 1.55rem; line-height: 1.15; }
.lead { color: var(--bone); font-size: clamp(1.12rem, 2vw, 1.35rem); max-width: 64ch; }
.sublead { color: var(--muted); max-width: 72ch; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.7rem; }
.button { display: inline-flex; align-items: center; min-height: 48px; padding: .7rem 1.1rem; color: var(--graphite); background: var(--amber); text-decoration: none; font-weight: 800; border: 1px solid var(--amber); }
.button.secondary { color: var(--bone); background: var(--steel); border-color: var(--line); }
main section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-head { display: grid; grid-template-columns: .55fr 1fr; gap: 2rem; align-items: end; margin-bottom: 2.5rem; }
.section-head p { color: var(--muted); max-width: 66ch; margin: 0; }
.chapter-grid, .plate-grid, .support-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.chapter, .plate, .policy-card, .source, .support-card { position: relative; overflow: hidden; border: 1px solid var(--line); background: var(--lift); padding: 1.45rem; }
.chapter::before { content: attr(data-number); position: absolute; right: .6rem; top: -.8rem; color: color-mix(in srgb, var(--copper), transparent 64%); font: 800 6rem/1 "Arial Narrow", sans-serif; }
.chapter h3, .plate h3 { position: relative; margin-block: .4rem .7rem; }
.chapter p, .plate p, .support-card p { color: var(--muted); }
.chapter a { position: relative; }
.plate { padding: 0; }
.plate img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
.plate-copy { padding: 1.25rem; }
.metal-band { border-block: 1px solid var(--line); background: linear-gradient(120deg, #342b25, var(--lift) 52%, #19272a); }
.bearing-layout { display: grid; grid-template-columns: minmax(280px,.75fr) 1.25fr; gap: clamp(2rem,6vw,6rem); align-items: center; }
.bearing { width: min(100%, 440px); aspect-ratio: 1; border: 18px solid var(--copper); border-radius: 50%; position: relative; margin-inline: auto; box-shadow: inset 0 0 0 8px var(--line), 0 0 0 24px var(--lift); animation: bearing 24s linear infinite; }
.bearing::before { content: ""; position: absolute; inset: 19%; border: 8px solid var(--bone); border-radius: 50%; }
.bearing::after { content: ""; position: absolute; width: 18%; height: 58%; left: 41%; top: 48%; background: var(--amber); border: 5px solid var(--graphite); border-radius: 1.5rem; transform-origin: 50% 0; }
@keyframes bearing { to { transform: rotate(360deg); } }
.rail { display: grid; grid-template-columns: repeat(4,1fr); position: relative; margin: 2rem 0; gap: 1rem; }
.rail::before { content: ""; position: absolute; left: 10%; right: 10%; top: 34px; height: 5px; background: var(--line); }
.rail-step { position: relative; text-align: center; }
.rail-step b { display: grid; place-items: center; width: 68px; height: 68px; margin: 0 auto 1rem; border-radius: 50%; color: var(--graphite); background: var(--amber); border: 5px solid var(--lift); position: relative; }
.rail-step p { color: var(--muted); font-size: .92rem; }
.boundary { border-left: 8px solid var(--danger); background: #2a211f; padding: 1.5rem; margin-block: 1rem; }
.boundary strong { color: var(--amber); }
.policy-list { display: grid; gap: .8rem; counter-reset: policy; }
.policy-card { display: grid; grid-template-columns: 64px 1fr; gap: 1rem; }
.policy-number { color: var(--amber); font: 800 2rem/1 "Arial Narrow", sans-serif; }
.policy-card h2 { font-size: 1.65rem; max-width: none; margin-bottom: .65rem; }
.policy-card p { color: var(--muted); margin: 0; }
.source { margin-bottom: .8rem; }
.source p { color: var(--muted); }
.source .url { overflow-wrap: anywhere; font-size: .9rem; }
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .55s ease, transform .55s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
footer { border-top: 1px solid var(--line); padding-block: 3rem; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
.footer-grid strong { color: var(--bone); }
.footer-links { display: grid; gap: .35rem; }
.fine { font-size: .84rem; color: var(--muted); }
@media (max-width: 900px) {
  .head-row { align-items: flex-start; padding-block: .8rem; flex-direction: column; gap: .6rem; }
  nav { margin-left: 0; justify-content: flex-start; }
  .hero { min-height: 560px; }
  .section-head, .bearing-layout { grid-template-columns: 1fr; }
  .chapter-grid, .plate-grid, .support-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .shell { width: min(calc(100% - 1.2rem), var(--max)); }
  nav { gap: .2rem .55rem; }
  nav a { font-size: .78rem; }
  .hero-copy { padding-block: 5rem 3.5rem; }
  .chapter-grid, .plate-grid, .support-grid { grid-template-columns: 1fr; }
  .rail { grid-template-columns: 1fr 1fr; }
  .rail::before { display: none; }
  .policy-card { grid-template-columns: 44px 1fr; padding: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}