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


body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
    padding: 20px;
}


nav ul {
    list-style-type: none;
    display: flex;
    justify-content: center;
    background-color: #333;
    padding: 10px 0;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #f39c12;
}


section#seccion {
    text-align: center;
    padding: 50px 20px;
    background-color: #3498db;
    color: white;
    border-radius: 8px;
}

section#seccion h1 {
    font-size: 3em;
    margin-bottom: 20px;
}

section#seccion p {
    font-size: 1.2em;
    max-width: 800px;
    margin: 0 auto;
}


article#articulo {
    padding: 40px;
    background-color: #fff;
    margin-top: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

article#articulo h2 {
    font-size: 2em;
    color: #333;
    margin-bottom: 15px;
}

article#articulo p {
    font-size: 1.1em;
    color: #555;
}


aside#aside {
    padding: 40px;
    background-color: #f9f9f9;
    margin-top: 20px;
    border-radius: 8px;
}

aside#aside h3 {
    font-size: 1.8em;
    margin-bottom: 20px;
}

aside#aside ul {
    list-style-type: none;
}

aside#aside ul li {
    font-size: 1.1em;
    margin-bottom: 10px;
}


footer#footer {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: white;
    margin-top: 40px;
    border-radius: 8px;
}

footer#footer p {
    font-size: 1em;
}


@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
    }

    section#seccion h1 {
        font-size: 2.5em;
    }

    article#articulo, aside#aside {
        padding: 20px;
    }
}