* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #1f2937, #0f172a); color: #f1f5f9;
}
main { flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 2rem; }
h1 { font-size: clamp(3rem, 12vw, 7rem); margin: 0; letter-spacing: .05em; }
.sub { font-size: 1.4rem; color: #fbbf24; margin: .5rem 0 1rem; }
footer { text-align: center; padding: 1rem; font-size: .85rem; color: #94a3b8; }