@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;700&family=IBM+Plex+Sans:wght@400;500&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ink: #1a2332;
  --ink-soft: #4a5568;
  --paper: #fafaf8;
  --line: #dfe1e6;
  --amber: #c07f2c;
  --amber-deep: #97621f;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a { color: var(--amber-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--amber-deep); outline-offset: 3px; }

header.site {
  border-bottom: 1px solid var(--line);
  padding: 20px 24px;
}

.header-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.wordmark span { color: var(--amber-deep); }

nav.site a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-left: 20px;
}

nav.site a:hover { color: var(--amber-deep); }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 2.1rem;
  line-height: 1.2;
  margin: 0 0 12px;
}

h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 500;
  font-size: 1.2rem;
  margin: 40px 0 12px;
}

p.lede {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 54ch;
}

p { margin: 0 0 14px; }
ul { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }

/* altitude-tape divider — the one signature element */
.altitude-rule {
  display: flex;
  align-items: center;
  gap: 3px;
  margin: 44px 0;
  height: 14px;
}
.altitude-rule .tick {
  flex: 1;
  height: 1px;
  background: var(--line);
}
.altitude-rule .tick.major {
  height: 7px;
  width: 1px;
  flex: 0 0 1px;
  background: var(--ink-soft);
  opacity: 0.5;
}

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 10px;
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 20px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 20px 22px;
  background: #fff;
}

.card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  margin: 0 0 6px;
}

.card p { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }

.card .tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--amber-deep);
  border: 1px solid var(--amber);
  border-radius: 3px;
  padding: 2px 7px;
  margin-bottom: 10px;
}

footer.site {
  border-top: 1px solid var(--line);
  padding: 28px 24px;
  margin-top: 40px;
}

.footer-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.footer-inner a { color: var(--ink-soft); }

@media (max-width: 560px) {
  h1 { font-size: 1.7rem; }
  nav.site a { margin-left: 12px; }
}