body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.nav {
    position: fixed;
    bottom: 0;
    width: 100%;
    display: flex;
    justify-content: space-around;
    background-color: #333;
    padding: 10px 0;
}

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

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