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

header {
    background-color: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

section {
    padding: 2em;
    text-align: center;
}

section#home {
    background-color: #e2e2e2;
}

.product {
    display: inline-block;
    width: 200px;
    margin: 20px;
    padding: 10px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.product img {
    width: 100%;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}