body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #111;
    color: #eee;
    text-align: center;
}

header {
    background-color: #222;
    padding: 20px;
    font-size: 24px;
}

h1 {
    color: #ffcc00;
}

h2 {
    color: #ff6600;
}

.introduccion {
    padding: 20px;
    max-width: 800px;
    margin: auto;
}

.cursos {
    padding: 20px;
}

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

ul li {
    font-size: 18px;
    margin: 10px 0;
}

ul li a {
    text-decoration: none;
    color: #ffcc00;
    font-weight: bold;
}

ul li a:hover {
    color: #ff6600;
}

footer {
    background-color: #222;
    padding: 10px;
    font-size: 14px;
    margin-top: 20px;
}