body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #0d0f1a;
  color: #f0f0f5;
  margin: 0;
  padding: 0;
}

header {
  background-color: #1a1d2f;
  padding: 2rem;
  text-align: center;
  border-bottom: 2px solid #3a3f58;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 1px;
  color: #00ffe1;
}

nav {
  margin: 2rem auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

a {
  text-decoration: none;
  background-color: #24293d;
  color: #00ffe1;
  padding: 1rem 2rem;
  border-radius: 10px;
  transition: 0.3s ease;
  width: 250px;
  text-align: center;
  font-weight: bold;
}

a:hover {
  background-color: #00ffe1;
  color: #0d0f1a;
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  color: #888;
  margin-top: 2rem;
}