:root {
  /* page body: light */
  --bg: #f5f2ea;
  --text: #1b1f24;
  /* top bar and footer: dark */
  --bar: #0d1117;
  --bar-border: #2a3342;
  --bar-text: #e6edf3;
  --bar-muted: #8b949e;
  --accent: #d4a017;
  --sans: 'Helvetica Neue', Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: Georgia, 'Times New Roman', serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex; flex-direction: column;
}
::selection { background: var(--accent); color: #000; }
a { color: inherit; text-decoration: none; }

header {
  background: rgba(13,17,23,0.92);
  border-bottom: 1px solid var(--bar-border);
  color: var(--bar-text);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px);
}
.nav {
  max-width: 1000px; margin: 0 auto; padding: 18px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo { font-size: calc(1.2rem + 4px); letter-spacing: 0.01em; white-space: nowrap; }
.logo em { color: var(--accent); font-style: normal; }
nav ul { display: flex; gap: 28px; list-style: none; font-family: var(--sans); font-size: calc(0.9rem + 4px); }
nav a { color: var(--bar-muted); transition: color .2s; }
nav a:hover, nav a:focus-visible, nav a[aria-current="page"] { color: var(--bar-text); }

main { flex: 1; width: 100%; max-width: 1000px; margin: 0 auto; padding: 88px 24px 96px; }
/* one line: shrinks with the viewport (text is ~16.5em wide), wraps only on phones */
h1 {
  font-size: clamp(2rem, calc((100vw - 48px) / 16.5), 2.8rem); font-weight: normal;
  line-height: 1.2; margin-bottom: 28px; white-space: nowrap;
}
/* all body copy shares one style */
p, .copy li { font-size: 1.1rem; font-weight: normal; color: var(--text); }
p { margin-bottom: 18px; }
.copy ul { margin: 0 0 18px 1.4em; }
.copy li { margin-bottom: 4px; }
.copy a { text-decoration: underline; text-underline-offset: 3px; }
.copy a:hover { color: #000; }
.copy a.social { display: inline-block; margin-top: 6px; text-decoration: none; line-height: 0; }
.social .tile { fill: var(--text); transition: fill .2s; }
.social .glyph { fill: var(--bg); }
.social:hover .tile, .social:focus-visible .tile { fill: #0a66c2; }

footer {
  background: var(--bar); border-top: 1px solid var(--bar-border); padding: 28px 0;
  color: var(--bar-muted); font-family: var(--sans); font-size: 0.8rem;
}
footer div { max-width: 1000px; margin: 0 auto; padding: 0 24px; }

@media (max-width: 640px) {
  .nav { padding: 16px 20px; }
  .logo { font-size: calc(1.05rem + 4px); }
  nav ul { gap: 18px; }
  main { padding: 56px 20px 72px; }
}
@media (max-width: 600px) {
  h1 { white-space: normal; text-wrap: balance; }
  footer div { padding: 0 20px; }
}