:root {
  color-scheme: light;
  --canvas: #f8f7f3;
  --ink: #202b36;
  --muted: #566573;
  --brand: #183e63;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100svh;
  display: grid;
  align-items: center;
  border-top: 5px solid var(--brand);
  background: var(--canvas);
  color: var(--ink);
  font-family: "Microsoft JhengHei", "PingFang TC", system-ui, sans-serif;
  line-height: 1.8;
}

main {
  width: min(100%, 56rem);
  margin: 0 auto;
  padding: 64px 32px;
}

.site-name { margin: 0 0 32px; color: var(--brand); font-weight: 700; }
h1 { margin: 0 0 16px; font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.4; }
.message { margin: 0; color: var(--muted); font-size: 1.125rem; }

@media (max-width: 480px) {
  main { padding: 48px 24px; }
}