* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #ffffff;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  text-align: center;
  max-width: 400px;
  width: 100%;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 24px;
  color: #111;
}

.navigation {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.navigation a {
  text-decoration: none;
  color: #0056b3;
  padding: 12px 20px;
  border: 2px solid #0056b3;
  border-radius: 12px;
  transition: all 0.3s ease;
}

.navigation a:hover {
  background-color: #0056b3;
  color: white;
}