:root {
  --ink: #171717;
  --muted: #686868;
  --paper: #f4f1ea;
  --panel: #ffffff;
  --line: #c8c4bb;
  --blue: #2f63ad;
  --orange: #dc640a;
  font-family: Tahoma, "MS Sans Serif", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); }
a { color: inherit; }

.archive-bar {
  min-height: 48px;
  padding: 0 clamp(20px, 4vw, 60px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: white;
  background: #202020;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.archive-bar a { text-decoration: none; }
.archive-bar a:hover, .archive-bar a:focus-visible { color: #ffb37a; }

main { max-width: 1400px; margin: 0 auto; }
.hero {
  min-height: calc(100vh - 48px);
  padding: clamp(54px, 8vw, 120px) clamp(22px, 6vw, 90px);
  display: grid;
  grid-template-columns: .78fr 1.22fr;
  align-items: center;
  gap: clamp(44px, 7vw, 100px);
}
.kicker, .section-number, .edition-label {
  color: var(--orange);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1 { margin: 18px 0 28px; font-size: clamp(4rem, 8vw, 8rem); line-height: .76; letter-spacing: -.08em; }
h1 em { color: var(--blue); font-style: normal; }
.lede { max-width: 620px; font-size: clamp(1.05rem, 1.7vw, 1.35rem); line-height: 1.65; }
.facts { margin: 40px 0 0; border-top: 1px solid var(--line); }
.facts div { padding: 11px 0; display: grid; grid-template-columns: 110px 1fr; border-bottom: 1px solid var(--line); }
.facts dt { color: var(--muted); font-size: 11px; text-transform: uppercase; }
.facts dd { margin: 0; font-size: 12px; font-weight: 700; }

.original-window { margin: 0; background: #dcdcdc; border: 2px solid white; border-right-color: #363636; border-bottom-color: #363636; box-shadow: 14px 18px 34px #0003; }
.window-title { min-height: 31px; padding: 5px 7px; display: flex; align-items: center; gap: 8px; color: white; background: linear-gradient(90deg, #17498e, #76a6dc); font-size: 12px; font-weight: 700; }
.window-title span { width: 20px; height: 20px; display: grid; place-items: center; background: var(--orange); border: 1px solid white; font-size: 9px; }
.original-window img { width: 100%; display: block; background: white; }
.original-window figcaption { padding: 10px 12px; color: #444; font-size: 11px; }

.access { padding: clamp(70px, 9vw, 130px) clamp(22px, 6vw, 90px); color: white; background: #191919; }
.access > header { max-width: 760px; margin-bottom: 54px; }
h2 { margin: 10px 0 18px; font-size: clamp(2.8rem, 5vw, 5rem); line-height: .98; letter-spacing: -.05em; }
.access > header > p:last-child { max-width: 660px; color: #bdbdbd; font-size: 1.05rem; line-height: 1.65; }
.edition-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: #4a4a4a; border: 1px solid #4a4a4a; }
.edition { padding: clamp(28px, 4vw, 52px); background: #242424; }
.edition.classic { box-shadow: inset 5px 0 0 var(--orange); }
.edition.rebuilt { box-shadow: inset 5px 0 0 #6482dc; }
.edition h3 { margin: 8px 0 18px; font-size: clamp(2rem, 3.5vw, 3.4rem); letter-spacing: -.045em; }
.edition > p:not(.edition-label):not(.edition-note) { min-height: 78px; color: #c8c8c8; line-height: 1.6; }
.edition ul { min-height: 104px; margin: 26px 0; padding: 0; list-style: none; color: #ddd; }
.edition li { padding: 7px 0; border-bottom: 1px solid #424242; font-size: 12px; }
.edition li::before { content: "■"; margin-right: 9px; color: var(--orange); font-size: 7px; }
.rebuilt li::before { color: #8fa9ff; }
.button { padding: 15px 17px; display: flex; justify-content: space-between; gap: 18px; color: white; border: 1px solid #777; text-decoration: none; font-size: 12px; font-weight: 700; }
.button.primary { color: #171717; background: #f2f2f2; border-color: white; }
.button:hover, .button:focus-visible { border-color: var(--orange); }
.text-link { margin-top: 18px; display: inline-block; color: #ffb37a; font-size: 11px; }
.edition-note { margin: 16px 0 0; color: #9c9c9c; font-size: 10px; line-height: 1.5; }

.featured-document { margin-top: 1px; padding: clamp(28px, 4vw, 52px); display: grid; grid-template-columns: 1.35fr .65fr; gap: clamp(34px, 6vw, 90px); background: #eeeae1; color: var(--ink); box-shadow: inset 5px 0 0 var(--orange); }
.featured-document h3 { max-width: 760px; margin: 8px 0 18px; font-size: clamp(2rem, 4vw, 4rem); line-height: 1; letter-spacing: -.05em; }
.featured-document > div > p:last-child { max-width: 700px; line-height: 1.65; }
.document-action { align-self: end; }
.document-action dl { margin: 0 0 24px; }
.document-action dl div { padding: 8px 0; display: grid; grid-template-columns: 90px 1fr; gap: 12px; border-bottom: 1px solid #c7c2b8; }
.document-action dt { color: var(--muted); font-size: 10px; text-transform: uppercase; }
.document-action dd { margin: 0; font-size: 11px; font-weight: 700; }
.featured-document .button.primary { color: white; background: #222; border-color: #222; }

.record { padding: clamp(70px, 9vw, 130px) clamp(22px, 6vw, 90px); display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(40px, 8vw, 120px); }
.record-copy { padding-top: 15px; }
.record-copy > p { max-width: 720px; font-size: 1.05rem; line-height: 1.75; }
.record-tags { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 8px; }
.record-tags span { padding: 8px 10px; border: 1px solid var(--line); color: var(--muted); font-size: 10px; text-transform: uppercase; }

.section-heading { max-width: 820px; margin-bottom: 48px; }
.section-heading > p:last-child { max-width: 680px; font-size: 1.05rem; line-height: 1.65; }

.history { padding: clamp(70px, 9vw, 130px) clamp(22px, 6vw, 90px); background: #e6e1d6; }
.timeline { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #aaa398; border-left: 1px solid #aaa398; list-style: none; }
.timeline li { min-height: 190px; padding: 24px; display: flex; flex-direction: column; border-right: 1px solid #aaa398; border-bottom: 1px solid #aaa398; }
.timeline time { color: var(--orange); font-size: 10px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.timeline strong { margin: 18px 0 10px; font-size: 1.35rem; }
.timeline span { color: #555; font-size: 12px; line-height: 1.6; }
.prototype-grid { margin-top: 44px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.prototype-grid figure, .original-grid figure, .uml-grid figure { margin: 0; }
.prototype-grid img { width: 100%; display: block; border: 1px solid #aaa398; }
.prototype-grid figcaption, .original-grid figcaption, .uml-grid figcaption { padding: 10px 2px; color: var(--muted); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }
.history-note { max-width: 760px; margin: 42px 0 0; padding-left: 18px; border-left: 4px solid var(--orange); font-size: 1.05rem; line-height: 1.65; }

.originals { padding: clamp(70px, 9vw, 130px) clamp(22px, 6vw, 90px); background: white; }
.original-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 34px 24px; }
.original-grid img { width: 100%; display: block; border: 1px solid #ccc; }

.technical { padding: clamp(70px, 9vw, 130px) clamp(22px, 6vw, 90px); color: white; background: #191919; }
.technical .section-heading > p:last-child { color: #bdbdbd; }
.uml-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #4a4a4a; border: 1px solid #4a4a4a; }
.uml-grid figure { padding: 18px; background: #f6f1e7; }
.uml-grid a { min-height: 340px; display: grid; place-items: center; }
.uml-grid img { width: 100%; max-height: 400px; object-fit: contain; display: block; }
.uml-grid figcaption { color: #555; }

.archive-files { padding: clamp(70px, 9vw, 130px) clamp(22px, 6vw, 90px); }
.file-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.file-grid article { min-height: 290px; padding: clamp(24px, 3vw, 40px); display: flex; flex-direction: column; background: #faf8f2; }
.file-grid p { margin: 0; color: var(--orange); font-size: 10px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.file-grid h3 { margin: 12px 0; font-size: clamp(1.7rem, 3vw, 2.6rem); letter-spacing: -.04em; }
.file-grid span { color: #555; font-size: 12px; line-height: 1.6; }
.file-grid a { margin-top: auto; padding-top: 30px; color: var(--blue); font-size: 11px; font-weight: 700; text-decoration: none; text-transform: uppercase; }
.file-grid a:hover, .file-grid a:focus-visible { color: var(--orange); }
.checksum-link { margin-top: 20px; display: inline-block; color: var(--muted); font-size: 10px; text-transform: uppercase; }

footer { padding: 28px clamp(22px, 6vw, 90px); display: flex; justify-content: space-between; gap: 20px; color: #aaa; background: #202020; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
footer a { color: white; }

@media (max-width: 880px) {
  .hero, .record { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { max-width: 700px; }
  .edition-grid { grid-template-columns: 1fr; }
  .edition > p:not(.edition-label):not(.edition-note), .edition ul { min-height: 0; }
  .featured-document { grid-template-columns: 1fr; }
  .timeline, .file-grid { grid-template-columns: 1fr 1fr; }
  .uml-grid { grid-template-columns: 1fr; }
  .uml-grid a { min-height: 0; }
}

@media (max-width: 520px) {
  .archive-bar { align-items: flex-start; flex-direction: column; padding-top: 13px; padding-bottom: 13px; }
  .facts div { grid-template-columns: 1fr; gap: 4px; }
  .edition { padding: 30px 24px; }
  .timeline, .prototype-grid, .original-grid, .file-grid { grid-template-columns: 1fr; }
  .timeline li, .file-grid article { min-height: 0; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }