styles.css

.embed-container {
  max-width: 550px; /* This is the max width of Twitter embeds */
}
.is-live-preview .embed-container.hide-link ~ span.external-link {
  display: none;
}
.embed-container.center {
  margin: 0 auto;
}
.embed-container.full-width {
  max-width: 100% !important;
}

/* Instagram */
.embed-container.instagram iframe {
  width: 100%;
  max-width: 550px;
}
.embed-container.instagram blockquote {
  display: none;
}

/* Noteflight and Flat.io */
.embed-container:is(.flat_io, .noteflight) {
  max-width: 750px;
}
.embed-container.flat_io iframe {
  width: 100%;
  height: 450px;
}
.embed-container.noteflight iframe {
  width: 100%;
  height: 450px;
}

/* GitHub Gists */
.embed-container.github_gist {
  max-width: 100%;
}
.embed-container.github_gist iframe {
  width: 100%;
}

/* YouTube */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  min-width: 300px;
  min-height: calc(300px * 0.5625);
}
.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Apple Podcasts & TV */

.embed-container.apple-podcasts iframe,
.embed-container.apple-tv iframe {
  width: 100%;
  overflow: hidden;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  border-bottom-right-radius: 10px;
  border-bottom-left-radius: 10px;
  background-color: transparent;
}

.embed-container.apple-tv .fake-link {
  display: block;
  position: absolute;
  content: "";
  height: 150px;
  width: 150px;
  top: calc(50% - 75px);
  left: calc(50% - 75px);
}

/* Generic Preview */
.embed-container.generic-preview .preview {
  text-decoration: none;
  color: inherit;
  background: var(--background-secondary);
  border: 1px solid var(--background-modifier-border);;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  margin: 0.5rem 0;
}
.embed-container.generic-preview .preview:hover {
  background: var(--background-secondary-alt);
  cursor: pointer;
}

.embed-container.generic-preview .preview .image-container {
  max-width: 100px;
}

.embed-container.generic-preview .preview .content {
  margin: 0.5rem;
  margin-left: 1rem;
}

.embed-container.generic-preview .preview .content .title {
  font-size: 1.05rem;
  font-weight: 600;
}

.embed-container.generic-preview .preview .content .description {
  color: var(--text-muted);
}

/* Settings */
.simple-embeds-settings details > summary {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.simple-embeds-settings details > summary::before {
  width: 2em;
  height: 2em;
  content: "";
  font-size: 9px;
  margin-right: 5px;
  display: inline-block;
  vertical-align: -0.3em;
  background-color: currentColor;
  /* Icon from https://heroicons.com */
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' class='h-6 w-6' fill='none' viewBox='0 0 24 24' stroke='currentColor'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M9 5l7 7-7 7' /%3E%3C/svg%3E");
  transition: transform 0.3s ease;
}

.simple-embeds-settings details[open] > summary::before {
  transform: rotate(90deg);
}

.simple-embeds-settings details > summary h4 {
  margin: 0.5em 0;
}

 /* https://github.com/paulirish/lite-youtube-embed */

lite-youtube {
  background-color: #000;
  position: relative;
  display: block;
  contain: content;
  background-position: center center;
  background-size: cover;
  cursor: pointer;
  /* max-width: 720px; */
}

/* gradient */
lite-youtube::before {
  content: "";
  display: block;
  position: absolute;
  top: 0;
  background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAADGCAYAAAAT+OqFAAAAdklEQVQoz42QQQ7AIAgEF/T/D+kbq/RWAlnQyyazA4aoAB4FsBSA/bFjuF1EOL7VbrIrBuusmrt4ZZORfb6ehbWdnRHEIiITaEUKa5EJqUakRSaEYBJSCY2dEstQY7AuxahwXFrvZmWl2rh4JZ07z9dLtesfNj5q0FU3A5ObbwAAAABJRU5ErkJggg==);
  background-position: top;
  background-repeat: repeat-x;
  height: 60px;
  padding-bottom: 50px;
  width: 100%;
  transition: all 0.2s cubic-bezier(0, 0, 0.2, 1);
}

/* responsive iframe with a 16:9 aspect ratio
    thanks https://css-tricks.com/responsive-iframes/
*/
lite-youtube::after {
  content: "";
  display: block;
  padding-bottom: calc(100% / (16 / 9));
}
lite-youtube > iframe {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border: 0;
}

/* play button */
lite-youtube > .lty-playbtn {
  width: 68px;
  height: 48px;
  position: absolute;
  cursor: pointer;
  transform: translate3d(-50%, -50%, 0);
  top: 50%;
  left: 50%;
  z-index: 1;
  background-color: transparent;
  /* YT's actual play button svg */
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 68 48"><path fill="%23f00" fill-opacity="0.8" d="M66.52,7.74c-0.78-2.93-2.49-5.41-5.42-6.19C55.79,.13,34,0,34,0S12.21,.13,6.9,1.55 C3.97,2.33,2.27,4.81,1.48,7.74C0.06,13.05,0,24,0,24s0.06,10.95,1.48,16.26c0.78,2.93,2.49,5.41,5.42,6.19 C12.21,47.87,34,48,34,48s21.79-0.13,27.1-1.55c2.93-0.78,4.64-3.26,5.42-6.19C67.94,34.95,68,24,68,24S67.94,13.05,66.52,7.74z"></path><path d="M 45,24 27,14 27,34" fill="%23fff"></path></svg>');
  filter: grayscale(100%);
  transition: filter 0.1s cubic-bezier(0, 0, 0.2, 1);
  border: none;
}

lite-youtube:hover > .lty-playbtn,
lite-youtube .lty-playbtn:focus {
  filter: none;
}

/* Post-click styles */
lite-youtube.lyt-activated {
  cursor: unset;
}
lite-youtube.lyt-activated::before,
lite-youtube.lyt-activated > .lty-playbtn {
  opacity: 0;
  pointer-events: none;
}

.lyt-visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}