body { background: #000; text-align: center; font-family: sans-serif; font-size: 13px; color: #fff; margin: 15px; }
a { color: #f00; text-decoration: none; }
a:hover { text-decoration: underline; }
iframe, img { width: 100%; max-width: 640px; }
#player { aspect-ratio: 16 / 9; height: auto; border: solid 2px #FFFFFF; margin: 0 auto; }
#content { display: none; }
svg { visibility: hidden; max-height: 50vh; }
#placeholder { width: 100%; height: 100%; background: #000; transition: opacity 0.5s; position: absolute; top: 0; left: 0; }
img { max-width: 225px; }