* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 15px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 15px;
}

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

section {
    padding: 20px;
    margin: 10px;
    background-color: white;
    border-radius: 8px;
}

.grid-productos {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

article {
    background-color: #ecf0f1;
    padding: 15px;
    border-radius: 5px;
}

button {
    margin-top: 10px;
    padding: 8px;
    border: none;
    background-color: #27ae60;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #219150;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #2c3e50;
    color: white;
}

@media (max-width: 768px) {
    .grid-productos {
        grid-template-columns: 1fr;
    }

    nav ul {
        flex-direction: column;
    }
}