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

body {
  font-family: system-ui, sans-serif;
  color: #1a1a1a;
  background: #fff;
  line-height: 1.6;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid #e5e5e5;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  text-decoration: none;
  color: #555;
  font-size: 0.95rem;
}

nav a:hover {
  color: #1a1a1a;
}

main {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 130px);
  padding: 2rem;
}

.hero {
  text-align: center;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.1rem;
  color: #666;
}

footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.85rem;
  color: #999;
  border-top: 1px solid #e5e5e5;
}