:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #171a21;
  --muted: #5b6472;
  --blue: #2962ff;
  --blue-deep: #152c73;
  --accent: #3399cc;
  --accent-soft: #9fd3ec;
  --line: #dde3f0;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11131a;
    --surface: #1a1d27;
    --text: #eef0f6;
    --muted: #a7afc0;
    --accent: #6fc1e8;
    --line: #2a2e3c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
}

a { color: var(--accent); }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

.top {
  display: flex;
  justify-content: flex-end;
  padding: 12px 16px;
  font-size: 15px;
}
.top a { color: var(--accent-soft); text-decoration: none; }

.hero {
  background: var(--blue-deep);
  color: #eaf1ff;
  text-align: center;
}
.hero-inner { padding: 48px 16px 56px; max-width: 720px; margin: 0 auto; }
.hero h1 {
  margin: 0 0 16px;
  font: 700 clamp(32px, 6vw, 48px)/1.1 var(--serif);
}
.hero p.tagline {
  font: 600 clamp(20px, 3.4vw, 26px)/1.35 var(--serif);
  margin: 0 0 16px;
}
.badge {
  display: inline-block;
  border: 1px solid var(--accent-soft);
  color: var(--accent-soft);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 15px;
}

section { padding: 48px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: 0; }

h2 {
  font: 600 28px/1.25 var(--serif);
  color: var(--text);
  margin: 0 0 16px;
}
h3 { font: 600 19px/1.3 var(--serif); margin: 0 0 6px; }

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.features li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
}
.features li.done { border-left: 3px solid var(--blue); }
.features p { margin: 0; color: var(--muted); font-size: 16px; }
.phase-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--blue);
  margin-bottom: 4px;
}

.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li {
  display: grid;
  grid-template-columns: 9em 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
.timeline li:last-child { border-bottom: 0; }
.timeline .when { color: var(--accent); font-weight: 600; }
.timeline .done::after { content: " ✓"; color: var(--blue); }

.prose { max-width: 720px; }
.prose h2 { margin-top: 32px; }

.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 18px;
  text-decoration: none;
  font-weight: 600;
}

footer {
  background: var(--blue-deep);
  color: #d9e4ff;
  padding: 24px 0;
  font-size: 15px;
}
footer a { color: var(--accent-soft); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }

.page-head { background: var(--blue-deep); color: #eaf1ff; }
.page-head .wrap { padding-top: 8px; padding-bottom: 32px; }
.page-head a.home { color: var(--accent-soft); font: 600 22px var(--serif); text-decoration: none; }

@media (max-width: 520px) {
  .timeline li { grid-template-columns: 1fr; gap: 0; }
}