body {
    font-family: Arial, sans-serif;
    background: #ffffff;
    color: #000000;
    line-height: 1.6;
    margin: 0;
    padding: 1rem;
}

header {
    border-bottom: 2px solid #000000;
}

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

nav li {
    display: inline-block;
    margin-right: 1rem;
}

a {
    color: #0000cc;
    text-decoration: underline;
}

.skip-link {
    position: absolute;
    left: -9999px;
}

.skip-link:focus {
    position: static;
    background: #ffff00;
    padding: 0.5rem;
}

main {
    max-width: 800px;
}

button,
audio {
    margin-top: 1rem;
}

footer {
    margin-top: 2rem;
    border-top: 1px solid #000000;
}