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

header {
    background-color: #333;
    color: #fff;
    padding: 15px 20px;
    text-align: center;
}

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

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

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

section {
    padding: 20px;
    text-align: center;
}

.produto {
    display: inline-block;
    margin: 20px;
    border: 1px solid #ccc;
    padding: 10px;
    width: 200px;
}

.produto img {
    width: 100%;
    height: auto;
}

.produto h3 {
    margin: 10px 0;
}

.produto p {
    color: #00a;
}

button {
    background-color: #00a;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}

button:hover {
    background-color: #005;
}

form {
    max-width: 400px;
    margin: 0 auto;
}

form label {
    display: block;
    margin: 10px 0 5px;
}

form input, form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}


button:focus {
    outline: none;
}

button:active {
    background-color: #003;
}