body {
    text-align: center;
}

iframe {
    filter: drop-shadow(2px 1px 1px black);
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 1),
      inset 0px 2px 1px rgba(255, 255, 255, 0.2),
      inset 0px -2px 1px rgba(0, 0, 0, 0.2);
}