:root {
  --paper: #f4f0ea;
  --ink: #2b2b2b;
  --muted: #3f3a34;
  --soft: #6b645c;
  --line: #e2dcd2;
  --card: #fffdf9;
  --rotors: #c45c26;
  --rotors-fill: #ffe8d6;
  --circuit: #1f6b8a;
  --circuit-fill: #d7eef6;
  --twist: #5b3fa8;
  --twist-fill: #e8e0f8;
  --shift: #2e7d4a;
  --shift-fill: #d9f0e0;
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.55;
}

a { color: var(--circuit); }
a:hover { color: var(--ink); }

img { max-width: 100%; height: auto; }

.wrap {
  width: min(68rem, calc(100% - 2.5rem));
  margin-inline: auto;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-size: 1.2rem;
}

.brand img {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
}

nav { display: flex; gap: 1.1rem; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

nav a[aria-current="page"],
nav a:hover { color: var(--ink); }

.hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.75rem;
  align-items: center;
  padding: 2.5rem 0 1rem;
}

.hero img.mark {
  width: 7.5rem;
  height: 7.5rem;
  border-radius: 1.6rem;
}

h1 {
  margin: 0 0 0.35rem;
  font-family: var(--serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.kicker {
  margin: 0 0 0.7rem;
  color: var(--soft);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lede {
  margin: 0;
  max-width: 38rem;
  font-size: 1.2rem;
  color: var(--muted);
}

.note {
  margin: 1rem 0 0;
  color: var(--soft);
  font-size: 0.95rem;
}

h2 {
  margin: 0 0 0.4rem;
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 500;
}

.section { padding: 2.4rem 0 0.4rem; }

.intro { max-width: 40rem; color: var(--muted); }

.mechanics {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.mechanics li {
  margin: 0;
  padding: 1rem 1.1rem 1.05rem;
  border-radius: 1rem;
  background: var(--card);
}

.mechanics h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  font-weight: 650;
}

.mechanics p { margin: 0; color: var(--muted); }

.mechanics .rotors h3 { color: var(--rotors); }
.mechanics .rotors { background: var(--rotors-fill); }
.mechanics .circuit h3 { color: var(--circuit); }
.mechanics .circuit { background: var(--circuit-fill); }
.mechanics .twist h3 { color: var(--twist); }
.mechanics .twist { background: var(--twist-fill); }
.mechanics .shift h3 { color: var(--shift); }
.mechanics .shift { background: var(--shift-fill); }

.shots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.shots figure { margin: 0; }

.shots img {
  display: block;
  width: 100%;
  border-radius: 1.4rem;
  border: 1px solid var(--line);
  background: var(--card);
}

.shots figcaption {
  margin-top: 0.55rem;
  color: var(--soft);
  font-size: 0.9rem;
}

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.facts article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1rem 1.1rem 1.1rem;
}

.facts h3 {
  margin: 0 0 0.35rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
}

.facts p { margin: 0; color: var(--muted); }

.page {
  padding: 1.5rem 0 2rem;
  max-width: 40rem;
}

.page h1 { font-size: clamp(2rem, 4vw, 2.8rem); }

.page h2 {
  margin-top: 1.8rem;
  font-size: 1.35rem;
}

.page p, .page li { color: var(--muted); }
.page ul { padding-left: 1.2rem; }

.foot {
  margin-top: 3rem;
  padding: 1.4rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--soft);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  justify-content: space-between;
}

.foot a { color: var(--soft); }

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; gap: 1rem; }
  .hero img.mark { width: 5.5rem; height: 5.5rem; }
  .mechanics, .facts { grid-template-columns: 1fr; }
  .shots {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 0.8rem;
    padding-bottom: 0.4rem;
  }
  .shots li { flex: 0 0 68%; scroll-snap-align: start; }
}