body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
}
header {
    background-color: #ffcc00;
    padding: 20px;
}
nav ul {
    list-style-type: none;
    padding: 0;
}
nav ul li {
    display: inline;
    margin: 0 10px;
}
nav ul li a {
    text-decoration: none;
    color: black;
    font-weight: bold;
}
footer {
    background-color: #333;
    color: white;
    padding: 10px;
    position: absolute;
    bottom: 0;
    width: 100%;
}
.product {
    display: inline-block;
    margin: 20px;
    text-align: center;
}
input, textarea {
    display: block;
    width: 80%;
    margin: 10px auto;
    padding: 5px;
}