:root {
  color-scheme: light;
  --ink: #17211d;
  --muted: #5f6f68;
  --line: #d8e0dc;
  --paper: #f7f4ec;
  --panel: #ffffff;
  --accent: #0f8b6c;
  --accent2: #c4512f;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
a { color: inherit; }

.topbar {
  min-height: 72px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.82);
}
.brand { display: flex; align-items: baseline; gap: 12px; font-weight: 700; }
.mark { padding: 6px 8px; color: white; background: var(--ink); border-radius: 4px; }
.name { font-size: 18px; }
.nav { display: flex; gap: 22px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--ink); }

.hero {
  min-height: calc(100vh - 160px);
  max-width: 1180px;
  margin: 0 auto;
  padding: 72px 32px 48px;
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(300px,440px);
  gap: 48px;
  align-items: center;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--accent2);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}
h1 { margin: 0; max-width: 780px; font-size: 54px; line-height: 1.02; }
.lead { max-width: 680px; margin: 22px 0 0; color: var(--muted); font-size: 20px; line-height: 1.5; }

.heroDiagram, .gallery figure {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.heroDiagram img, .gallery img { display: block; width: 100%; height: auto; }
.heroDiagram img { max-height: 560px; object-fit: contain; }
.heroDiagram figcaption, .gallery figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.grid {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px 56px;
  display: grid;
  grid-template-columns: repeat(3,minmax(0,1fr));
  gap: 18px;
}
.grid article {
  min-height: 160px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.factValue { margin: 0; color: var(--accent); font-size: 38px; font-weight: 700; }
.grid h2 { margin: 10px 0 12px; font-size: 20px; }
.grid article p:last-child { margin: 0; color: var(--muted); line-height: 1.5; }

.section { max-width: 1180px; margin: 0 auto; padding: 54px 32px 32px; }
.sectionHead { max-width: 760px; margin-bottom: 26px; }
.sectionHead h2 { margin: 0; font-size: 38px; }
.sectionHead > p:last-child { color: var(--muted); line-height: 1.55; }
.gallery { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.gallery .wide { grid-column: 1 / -1; }
.downloads { margin: 18px 0 0; color: var(--muted); }
.downloads a { color: var(--accent); font-weight: 700; }

.longRead {
  max-height: 620px;
  overflow-y: auto;
  padding: 28px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: var(--panel);
  scrollbar-color: var(--accent) var(--paper);
}
.longRead:focus { outline: 2px solid var(--accent); outline-offset: 3px; }
.longRead h3 { margin: 34px 0 10px; font-size: 22px; }
.longRead h3:first-child { margin-top: 0; }
.longRead p, .longRead li { color: var(--muted); line-height: 1.6; }
.longRead pre {
  margin: 14px 0 20px;
  padding: 20px;
  overflow-x: auto;
  border-radius: 6px;
  background: #111a17;
  color: #d8fff0;
  font: 14px/1.55 "Courier New", monospace;
}
.back { max-width: 1180px; margin: 0 auto; padding: 24px 32px 64px; }
.back a { color: var(--accent); font-weight: 700; text-decoration: none; }
.footer { padding: 28px 32px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; }

@media (max-width: 820px) {
  .topbar { padding: 18px; align-items: flex-start; gap: 14px; flex-direction: column; }
  .nav { flex-wrap: wrap; gap: 14px; }
  .hero { min-height: auto; padding: 46px 18px 32px; grid-template-columns: 1fr; gap: 30px; }
  h1 { font-size: 36px; }
  .lead { font-size: 17px; }
  .grid { padding: 0 18px 40px; grid-template-columns: 1fr; }
  .section { padding: 42px 18px 24px; }
  .sectionHead h2 { font-size: 30px; }
  .gallery { grid-template-columns: 1fr; }
  .gallery .wide { grid-column: auto; }
  .longRead { max-height: 520px; padding: 20px; }
  .back { padding: 20px 18px 48px; }
}