:root {
  color: #2b2220;
  background: #f3ece3;
  font-family: Inter, "Avenir Next", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --crimson: #b1282d;
  --oxblood: #64191d;
  --hero: #330808;
  --paper: #f8f6f1;
  --muted: #746660;
  --wash: #e9ddd1;
  --line: rgba(43, 34, 32, .2);
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 300px; }
a { color: var(--oxblood); }
.masthead { display: flex; min-height: 94px; align-items: center; justify-content: space-between; gap: 24px; padding: 20px max(24px, 6vw); background: var(--hero); color: #fff; }
.masthead div { display: grid; gap: 3px; }
.masthead strong { font-size: 24px; letter-spacing: .08em; }
.masthead span { color: rgba(255, 255, 255, .68); font: 600 10px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; text-transform: uppercase; }
main { width: min(1040px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 88px; }
.hero { max-width: 820px; }
.eyebrow, .section-number, .platform { color: var(--crimson); font: 750 11px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .09em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 8px 0 18px; font-size: clamp(42px, 8vw, 76px); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 720px; margin: 0; color: var(--muted); font-size: clamp(18px, 2.2vw, 23px); line-height: 1.5; }
.release-line { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: baseline; margin-top: 28px; padding: 15px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.release-line strong { color: var(--oxblood); }
.release-line span { color: var(--muted); font-size: 13px; }
.release-notes { white-space: pre-line; line-height: 1.6; }
.guide-callout { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 28px; align-items: center; margin-top: 32px; padding: 24px; border: 1px solid var(--line); border-left: 5px solid var(--crimson); background: var(--paper); }
.guide-callout h2 { margin: 3px 0 8px; font-size: clamp(22px, 3vw, 31px); line-height: 1.08; letter-spacing: -.03em; }
.guide-callout p:not(.eyebrow) { max-width: 650px; margin: 0; color: var(--muted); line-height: 1.55; }
.guide-button { display: inline-block; padding: 14px 18px; background: var(--oxblood); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: .04em; text-align: center; text-decoration: none; white-space: nowrap; }
.guide-button:hover { background: var(--crimson); }
section:not(.hero) { margin-top: 76px; }
section > header { display: grid; grid-template-columns: 52px 1fr; align-items: baseline; border-bottom: 2px solid #2b2220; }
section > header h2 { margin: 0 0 14px; font-size: clamp(25px, 3vw, 38px); letter-spacing: -.03em; text-transform: uppercase; }
.section-number { margin: 0; }
.download-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.download-card { position: relative; min-height: 330px; padding: 32px; border: 1px solid var(--line); border-top: 0; background: var(--paper); }
.download-card + .download-card { border-left: 0; }
.download-card.recommended { background: #fff; box-shadow: inset 0 4px 0 var(--crimson); }
.recommendation { display: inline-block; padding: 5px 8px; background: var(--oxblood); color: #fff; font: 700 9px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .06em; text-transform: uppercase; }
.recommendation[hidden] { display: none !important; }
.platform { margin: 40px 0 8px; }
.download-card h3 { margin: 0; font-size: 25px; }
.download-card p:not(.platform) { min-height: 72px; color: var(--muted); line-height: 1.55; }
.download-button { display: inline-block; padding: 13px 17px; background: var(--crimson); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: .04em; text-decoration: none; }
.download-button:hover { background: var(--oxblood); }
.download-button.disabled { pointer-events: none; background: var(--wash); color: var(--muted); }
.instructions ol { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; counter-reset: step; }
.instructions li { min-height: 210px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); counter-increment: step; }
.instructions li:first-child { border-left: 1px solid var(--line); }
.instructions li::before { display: block; margin-bottom: 36px; color: var(--crimson); content: "0" counter(step); font: 700 12px ui-monospace, monospace; }
.instructions strong, .instructions span { display: block; }
.instructions span { margin-top: 10px; color: var(--muted); line-height: 1.55; }
.integrity > p { max-width: 820px; line-height: 1.7; }
details { margin-top: 20px; border: 1px solid var(--line); background: var(--paper); }
summary { padding: 18px 20px; cursor: pointer; font-weight: 750; }
dl { margin: 0; padding: 0 20px 20px; }
dl div { padding: 14px 0; border-top: 1px solid var(--line); }
dt { color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
dd { margin: 7px 0 0; overflow-wrap: anywhere; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.technical-link { display: inline-block; margin: 0 20px 22px; font-weight: 700; }
footer { display: flex; justify-content: space-between; gap: 20px; padding: 28px max(24px, 6vw); background: var(--hero); color: rgba(255,255,255,.7); }
footer a { color: #fff; font-weight: 700; }
@media (max-width: 720px) {
  .masthead { align-items: flex-start; flex-direction: column; }
  main { width: min(100% - 32px, 1040px); padding-top: 50px; }
  .download-grid, .instructions ol { grid-template-columns: 1fr; }
  .guide-callout { grid-template-columns: 1fr; }
  .guide-button { width: 100%; white-space: normal; }
  .download-card + .download-card { border-left: 1px solid var(--line); }
  .instructions li { min-height: 0; border-left: 1px solid var(--line); }
  footer { align-items: flex-start; flex-direction: column; }
}