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

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh; /* Full viewport height */
}

.container {
    text-align: center;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

header h1 {
    margin-bottom: 20px;
}

.nav-links {
    list-style: none;
}

.nav-links li {
    margin: 15px 0;
}

.nav-links a {
    display: block;
    padding: 10px;
    color: #4CAF50;
    text-decoration: none;
    border: 1px solid #4CAF50;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: #4CAF50;
    color: white;
}