/* Requisito: Especificación CSS */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
}

nav ul {
    list-style-type: none;
    padding: 0;
    background-color: #34495e;
    overflow: hidden;
    margin: 0;
}

nav li {
    float: left;
}

nav li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

nav li a:hover {
    background-color: #1abc9c;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: auto;
    background: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

section {
    margin-bottom: 30px;
    border-bottom: 1px solid #eee;
    padding-bottom: 20px;
}

/* Requisito: Imágenes (y videos/mapas) adaptables */
img, video, iframe {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 10px auto;
}

button {
    background-color: #2980b9;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 16px;
    margin: 5px;
    border-radius: 4px;
}

button:hover {
    background-color: #3498db;
}

input {
    padding: 8px;
    margin: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
}