:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #5b6472;
  --line: #d6dae1;
  --hover: #f3f5f8;
  --link: #1d4ed8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --text: #eef0f3;
    --muted: #a3abb8;
    --line: #2c313a;
    --hover: #181b21;
    --link: #8ab4ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
.hub { max-width: 600px; margin: 0 auto; padding: 56px 16px 40px; }
h1 { font-size: 2.5rem; line-height: 1.1; margin: 0 0 8px; letter-spacing: -0.01em; }
.tagline { font-size: 1.25rem; color: var(--muted); margin: 0 0 20px; }
.bio { margin: 0 0 36px; }
.bio a { color: var(--link); }
cite { font-style: italic; }
h2 { font-size: 0.9375rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 32px 0 12px; font-weight: 600; }
.links { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.links a {
  display: block;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}
.links a span { display: block; font-weight: 400; font-size: 1rem; color: var(--muted); }
.links a:hover { background: var(--hover); }
.links a:focus-visible, .bio a:focus-visible { outline: 3px solid var(--link); outline-offset: 2px; }
footer { margin-top: 48px; color: var(--muted); font-size: 1rem; }
footer p { margin: 0; }