body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

nav {
    background: #333;
    color: white;
    padding: 10px 20px;
    text-align: center;
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

ul li {
    padding: 10px 20px;
}

ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

ul li a:hover {
    color: #007BFF;
}

@media (max-width: 600px) {
    ul {
        flex-direction: column;
        text-align: center;
    }

    ul li {
        padding: 10px;
    }
}

h4 {
    margin-bottom: 0;
    margin-left: 10px;
}

p {
    margin-left: 10px;
}

h1 {
    margin-left: 10px;
}

h2 {
    margin-left: 10px;
}

h3 {
    margin-left: 10px;
}

input {
    margin-left: 10px;
}