:root {
  --bg: #FAF8F5;
  --bg-card: #FFFFFF;
  --ink: #1A1A1A;
  --ink-soft: #4A4A4A;
  --ink-quiet: #777;
  --rule: #E5E1DA;
  --cobalt: #0C3FCC;
  --warm: #C8552D;
  --critical: #8B1A1A;
  --paper: #F2EEE5;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'IBM Plex Sans', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.masthead {
  border-bottom: 1px solid var(--rule);
  padding: 24px 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
  background-color: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(8px);
}
.masthead-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.brand-mark {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}
.brand-mark strong { color: var(--ink); font-weight: 500; }
nav { display: flex; gap: 22px; flex-wrap: wrap; }
nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  transition: color 0.2s, border-color 0.2s;
}
nav a:hover { color: var(--cobalt); border-bottom-color: var(--cobalt); }
nav a.current { color: var(--ink); border-bottom-color: var(--ink); }

.page-head {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 32px 48px;
}
.page-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 24px;
}
.page-head h1 {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-weight: 400;
  font-size: clamp(36px, 4.5vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 20ch;
}
.page-head .dek {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-weight: 300;
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.4;
  color: var(--ink-soft);
  max-width: 56ch;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px 96px;
}

footer {
  border-top: 1px solid var(--rule);
  padding: 48px 32px;
  margin-top: 64px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-inner .col {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-quiet);
  line-height: 1.8;
}
.footer-inner .col strong { color: var(--ink); display: block; margin-bottom: 8px; font-weight: 500; }

.fade { opacity: 0; transform: translateY(12px); transition: opacity 0.6s, transform 0.6s; }
.fade.in { opacity: 1; transform: translateY(0); }