*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1a1a2e;
  background: #f5f5f7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  padding: 1.5rem 2rem;
}

nav .logo {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero {
  text-align: center;
  padding: 2rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  color: #555;
  max-width: 480px;
  margin: 0 auto;
}

footer {
  padding: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: #888;
}