:root{
  --ink:#101820;
  --ink-2:#34434d;
  --paper:#fbfaf7;
  --panel:#fff;
  --red:#c41230;
  --red-deep:#921027;
  --teal:#1f6f68;
  --blue:#23566f;
  --gold:#9a6a00;
  --rule:#d9d5cc;
  --soft:#eef2f2;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--paper)}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Hanken Grotesk",Inter,system-ui,-apple-system,sans-serif;line-height:1.45}
a{color:var(--blue)}
a:focus-visible{outline:3px solid var(--red);outline-offset:3px}
.skip-link{position:fixed;z-index:100;left:16px;top:12px;transform:translateY(-180%);padding:9px 13px;border-radius:4px;background:#fff;color:var(--ink);font-weight:800}
.skip-link:focus{transform:none}
.atlas-hero{background:var(--ink);color:#fff;border-bottom:6px solid var(--red)}
.hero-inner{width:min(1460px,calc(100% - 40px));margin:auto;padding:34px 0 30px}
.back-link{display:inline-block;color:#fff;text-decoration:none;font-weight:750;font-size:14px}
.back-link:hover{text-decoration:underline}
.eyebrow{margin:34px 0 5px;color:#d7b667;font:800 12px/1.2 "JetBrains Mono",ui-monospace,monospace;letter-spacing:.12em;text-transform:uppercase}
h1{max-width:980px;margin:0;font-size:clamp(42px,6vw,84px);line-height:.92;letter-spacing:-.045em}
.hero-copy{max-width:980px;margin:20px 0 0;color:#d8dfe2;font-size:clamp(17px,2vw,23px);line-height:1.35}
.visual-key{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;color:#e8edef;font:750 12px/1.3 "JetBrains Mono",ui-monospace,monospace;text-transform:uppercase;letter-spacing:.04em}
.visual-key span{display:inline-flex;align-items:center;gap:7px}
.swatch{display:inline-block;width:18px;height:8px;border-radius:2px;background:var(--blue)}
.swatch.effect{background:var(--teal)}
.swatch.block{background:var(--red)}
.swatch.caution{background:var(--gold)}
.review-note{max-width:980px;margin:24px 0 0;padding:10px 13px;border-left:4px solid #d7b667;background:#1c2930;color:#e8edef;font-size:13px}
.atlas-nav{position:sticky;z-index:20;top:0;display:flex;flex-wrap:wrap;justify-content:center;gap:8px;padding:10px 20px;border-bottom:1px solid var(--rule);background:rgba(251,250,247,.96);backdrop-filter:blur(12px)}
.atlas-nav a{padding:7px 12px;border:1px solid var(--rule);border-radius:999px;background:#fff;color:var(--ink);font-weight:800;font-size:13px;text-decoration:none}
.atlas-nav a:hover{border-color:var(--red);color:var(--red-deep)}
main{width:min(1280px,calc(100% - 40px));margin:0 auto;padding:12px 0 64px}
.atlas-section{scroll-margin-top:72px;padding-top:50px}
.section-heading{display:flex;align-items:flex-end;gap:15px;margin-bottom:18px;padding-bottom:12px;border-bottom:3px solid var(--ink)}
.section-heading>span{display:grid;place-items:center;width:45px;height:45px;border-radius:50%;background:var(--red);color:#fff;font:800 15px/1 "JetBrains Mono",ui-monospace,monospace}
.section-heading p{margin:0 0 2px;color:var(--red-deep);font:800 11px/1.2 "JetBrains Mono",ui-monospace,monospace;letter-spacing:.09em;text-transform:uppercase}
.section-heading h2{margin:0;font-size:clamp(27px,3.2vw,43px);line-height:1;letter-spacing:-.025em}
.atlas-grid{display:grid;grid-template-columns:minmax(0,1202px);justify-content:center;gap:24px}
.atlas-card{scroll-margin-top:76px;margin:0;border:1px solid var(--rule);border-top:5px solid var(--blue);border-radius:7px;background:var(--panel);box-shadow:0 8px 24px rgba(16,24,32,.055);overflow:hidden}
.atlas-card:nth-child(4n+2){border-top-color:var(--teal)}
.atlas-card:nth-child(4n+3){border-top-color:var(--gold)}
.atlas-card:nth-child(4n+4){border-top-color:var(--red)}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px 9px;border-bottom:1px solid var(--rule)}
.card-top span{font-size:18px;font-weight:850;letter-spacing:-.015em}
.card-top a{flex:none;padding:5px 8px;border:1px solid var(--rule);border-radius:4px;color:var(--ink-2);font:750 10px/1.2 "JetBrains Mono",ui-monospace,monospace;text-decoration:none;text-transform:uppercase}
.card-top a:hover{border-color:var(--red);color:var(--red-deep)}
.diagram-scroll{overflow-x:auto;overscroll-behavior-x:contain;background:#fffaf6;scrollbar-color:var(--blue) var(--soft)}
.diagram-scroll:focus-visible{outline:3px solid var(--red);outline-offset:-3px}
.diagram-scroll img{display:block;width:1200px;max-width:none;height:520px;background:#fffaf6}
.atlas-card figcaption{min-height:68px;padding:11px 14px 13px;border-top:1px solid var(--rule);color:var(--ink-2);font-size:14px}
.atlas-card figcaption b{color:var(--ink)}
.atlas-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px max(20px,calc((100% - 1460px)/2));border-top:5px solid var(--red);background:var(--ink);color:#d8dfe2;font-size:13px}
.atlas-footer p{margin:0}
.atlas-footer b{color:#fff}
.atlas-footer a{color:#fff;font-weight:800}
@media (max-width:850px){
  .hero-inner,main{width:min(100% - 24px,1280px)}
  .hero-inner{padding-top:22px}
  .eyebrow{margin-top:28px}
  .atlas-nav{justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap}
  .atlas-nav a{white-space:nowrap}
  .atlas-grid{grid-template-columns:1fr}
  .atlas-section{padding-top:36px}
  .card-top span{font-size:16px}
  .atlas-footer{align-items:flex-start;flex-direction:column}
}
@media (max-width:520px){
  h1{font-size:43px}
  .hero-copy{font-size:17px}
  .visual-key{display:grid;grid-template-columns:1fr 1fr;font-size:10px}
  .section-heading>span{width:38px;height:38px}
  .card-top{align-items:flex-start;flex-direction:column}
  .atlas-card figcaption{font-size:13px}
}
@media print{
  @page{size:letter landscape;margin:10mm}
  body{background:#fff}
  .skip-link,.atlas-nav,.back-link,.card-top a,.atlas-footer{display:none}
  .atlas-hero{background:#fff;color:var(--ink);border-bottom:3px solid var(--red)}
  .hero-inner,main{width:100%}
  .hero-inner{padding:0 0 12px}
  .eyebrow{margin-top:0}
  .hero-copy,.review-note{color:var(--ink)}
  .review-note{background:#fff;border:1px solid var(--rule);border-left:4px solid var(--gold)}
  .atlas-section{break-before:page;padding-top:0}
  .atlas-grid{display:block}
  .atlas-card{break-inside:avoid;margin:0 0 8mm;box-shadow:none}
  .diagram-scroll{overflow:visible}
  .diagram-scroll img{width:100%;max-width:100%;height:auto}
}