:root {
  color-scheme: light;
  --ink: #221d19;
  --muted: #6f6258;
  --red: #dc241f;
  --cream: #fff8ec;
  --paper: rgba(255, 255, 255, 0.78);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 10%, #ffdcd6 0, transparent 32rem),
    linear-gradient(145deg, #fffaf0, #f3ead8);
}

main { width: min(720px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0; }

.mark {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  margin-bottom: 28px;
  border-radius: 18px;
  color: white;
  background: var(--red);
  font-size: 30px;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(220, 36, 31, 0.22);
}

h1 { margin: 0 0 18px; font-size: clamp(42px, 8vw, 66px); letter-spacing: -0.055em; line-height: .96; }
h2 { margin: 38px 0 10px; font-size: 22px; letter-spacing: -0.02em; }
p, li { font-size: 18px; line-height: 1.62; }
.intro { color: var(--muted); font-size: 22px; }
.card { margin-top: 38px; padding: 26px; border: 1px solid rgba(80, 55, 38, .10); border-radius: 24px; background: var(--paper); box-shadow: 0 18px 50px rgba(67, 46, 31, .08); }
a { color: #b31d19; font-weight: 650; }
nav { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
nav a { padding: 12px 16px; border-radius: 999px; background: white; text-decoration: none; }
footer { margin-top: 48px; color: var(--muted); font-size: 14px; }

@media (max-width: 520px) {
  main { padding: 42px 0; }
  .card { padding: 20px; }
  p, li { font-size: 17px; }
}