body {
    background-color: white; 
    font-family: arial, sans-serif;
}
p {
    color: black;
}
.iframe-container {
    overflow: hidden;
    padding-bottom: 56.25%; /* ratio 16x9 */
    position: relative; 
}
.iframe-container iframe {
    border: 0;
    height: 90%;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%; 
}