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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f0f0f;
  color: #e8e8e8;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

main {
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.tagline {
  color: #888;
  font-size: 1rem;
  margin-bottom: 2rem;
}

nav {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

nav a {
  color: #e8e8e8;
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 1px solid #444;
  padding-bottom: 2px;
  transition: border-color 0.2s;
}

nav a:hover {
  border-color: #e8e8e8;
}