header {
    background-color: #0047ab;
    color: white;
    padding: 20px;
    text-align: center;
    width: 100%;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    padding: 0;
    max-width: 1200px;
    margin: 20px auto;
    background-color: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.content {
    width: 100%;
    padding: 20px;
    margin: 0;
}

footer {
    background-color: #0047ab;
    color: white;
    padding: 10px;
    text-align: center;
    width: 100%;
    font-size: 12px;
    margin: 10px;
    position: relative;
    bottom: 0;
}

.youtube-playlist {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
}

.youtube-playlist iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}