body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 20px;
}

.portada {
    width: 100%;
    height: auto;
}

nav {
    background-color: #333;
    color: white;
}

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

nav ul li {
    display: inline;
    margin-right: 20px;
}

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

section {
    padding: 20px;
    margin: 10px;
    background-color: white;
    border-radius: 5px;
}

.producto {
    margin-bottom: 20px;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    position: relative;
    bottom: 0;
    width: 100%;
}