:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5b6475;
  --accent: #1557c0;
  --border: #dfe5ee;
  --max: 900px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header, main, footer {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
}

header {
  padding: 3rem 0 1.5rem;
}

.brand {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 750;
  letter-spacing: -0.04em;
  margin: 0;
}

.brand a {
  color: var(--accent);
  text-decoration: none;
}

.tagline {
  margin-top: .5rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(1.25rem, 4vw, 2rem);
  margin: 1rem 0;
  box-shadow: 0 8px 24px rgba(20, 35, 60, 0.05);
}

h1, h2 {
  line-height: 1.2;
}

h1 {
  margin-top: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

h2 {
  margin-top: 1.8rem;
  font-size: 1.35rem;
}

a {
  color: var(--accent);
}

.actions {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.button {
  display: inline-block;
  padding: .7rem 1rem;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 650;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

ul {
  padding-left: 1.25rem;
}

footer {
  padding: 1.5rem 0 3rem;
  color: var(--muted);
  font-size: .95rem;
}

.small {
  color: var(--muted);
  font-size: .95rem;
}