:root {
  --ink: #0f172a;
  --ink-2: #475569;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #2563eb;
  --brand-900: #1e3a8a;
  --bg: #f7f8fb;
  --surface: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  background: linear-gradient(135deg, var(--brand-900), var(--brand));
  color: #fff;
  padding: 18px 20px;
}
.topbar .wrap { max-width: 760px; margin: 0 auto; display: flex; align-items: center; gap: 12px; }
.topbar a { color: #fff; text-decoration: none; font-weight: 600; }
.topbar .name { font-size: 18px; font-weight: 700; letter-spacing: -0.2px; }
.topbar nav { margin-left: auto; display: flex; gap: 18px; font-size: 14px; }
.topbar nav a { opacity: 0.92; }
.topbar nav a:hover { opacity: 1; text-decoration: underline; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 30px;
}

h1 { font-size: 28px; line-height: 1.25; margin: 0 0 6px; letter-spacing: -0.4px; }
h2 { font-size: 18px; margin: 30px 0 8px; letter-spacing: -0.2px; }
p, li { color: var(--ink-2); font-size: 15.5px; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
a { color: var(--brand); }
strong { color: var(--ink); }
hr { border: none; border-top: 1px solid var(--line); margin: 28px 0; }

.updated { color: var(--muted); font-size: 14px; margin: 0 0 20px; }
.note { color: var(--muted); font-size: 14px; font-style: italic; }

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 48px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
footer a { color: var(--muted); }

/* Landing page */
.hero { text-align: center; padding: 24px 0 8px; }
.hero h1 { font-size: 32px; }
.hero p { font-size: 17px; max-width: 560px; margin: 8px auto 0; }
.links { display: grid; gap: 12px; margin-top: 28px; }
.linkcard {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--ink);
}
.linkcard:hover { border-color: var(--brand); }
.linkcard b { display: block; font-size: 16px; }
.linkcard span { color: var(--muted); font-size: 14px; }