body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    background-color: #e9ecef;
    font-family: Arial, sans-serif;
}

nav {
    color: white;
    padding: 10px;
    width: 100%;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.1);
    text-align: center; 
}

.container {
    text-align: center;
    max-width: 400px;
    width: 80%; 
    margin: auto;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    margin-top: 20px;
}

button:hover {
    background-color: #45a049;
}

h2 {
    font-family: 'Times New Roman', Times, serif;
}