body {
    background-color: #eeeeee;
    color: #222222;
    font-family: Arial, sans-serif;
    margin: 0;
}

header {
    background-color: #243b55;
    color: white;
    padding: 25px;
    text-align: center;
}

main {
    max-width: 800px;
    margin: 30px auto;
    background-color: white;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

h1 {
    margin: 0;
}

h2 {
    color: #243b55;
}

a {
    color: #174ea6;
}

a:hover {
    color: #8b0000;
}

.small {
    font-size: 12px;
    color: #777777;
}


#botonMusica {
    display: none;
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: black;
    color: white;
    border: 1px solid #555555;
    padding: 10px 18px;
    font-family: Arial, sans-serif;
    cursor: pointer;
}

body.secreto #botonMusica {
    display: block;
}