:root {
  --bg: #fff;
  --text: #1e1e1e;
  --muted: #5f5f5f;
  --accent: #1f4b99;
  --rule: #e4e4e4;
  --width: 720px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161616;
    --text: #e8e8e8;
    --muted: #a3a3a3;
    --accent: #8fb3f0;
    --rule: #2e2e2e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.site-header, main, .site-footer {
  max-width: var(--width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.site-title { font-weight: 600; color: var(--text); text-decoration: none; }
.site-header nav { display: flex; gap: 1.25rem; }

a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

h1 { font-size: 2.25rem; line-height: 1.2; margin: 2rem 0 0.5rem; }
h2 { font-size: 1.5rem; margin: 2.5rem 0 0; }
h3 { font-size: 1.2rem; margin: 0 0 0.25rem; }

.project { padding: 1.25rem 0; border-bottom: 1px solid var(--rule); }
.project p { margin: 0.5rem 0; }
.project .note { color: var(--muted); font-size: 0.875rem; }

.site-footer { color: var(--muted); font-size: 0.875rem; padding-top: 2rem; padding-bottom: 2rem; }