/* Hard Numbers public site — plain CSS, no external fonts, no scripts. */

:root {
  --bg: #ffffff;
  --fg: #0b1121;
  --muted: #5b6475;
  --accent: #2b88c8;
  --rule: #e5e8ee;
  --max: 40rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1121;
    --fg: #f1f4f9;
    --muted: #a3acbd;
    --accent: #38bdf8;
    --rule: #1f2a40;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}

h1 {
  font-size: 2rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.125rem;
  margin: 2rem 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

.lead {
  font-size: 1.25rem;
  color: var(--muted);
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

.brand {
  display: inline-block;
  margin-bottom: 2rem;
  color: var(--fg);
  text-decoration: none;
  font-weight: 700;
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

@media (min-width: 40rem) {
  main {
    padding-top: 5rem;
  }

  h1 {
    font-size: 2.5rem;
  }
}