body {
    margin: 0;
    font-family: sans-serif;
    line-height: 1.8;
}

header img {
    width: 100%;
    display: block;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

section {
    margin-bottom: 60px;
}

h2 {
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
}

ul {
    padding-left: 20px;
}

a {
    text-decoration: none;
}

.youtube {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
}

.youtube iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

footer {
    text-align: center;
    padding: 40px 20px;
}

footer a {
    margin: 0 10px;
}

footer img {
    width: 40px;
    height: 40px;
}

footer p {
    margin-top: 20px;
    font-size: 0.9rem;
}