formstone/src/css/background.css

Library of modular front end components.

.fs-background {
  --fs-background-duration: 0.15s;
  position: relative;
}

@media (prefers-reduced-motion) {
  .fs-background {
    --fs-background-duration: 0s;
  }
}

.fs-background,
.fs-background-container,
.fs-background-media {
  transition: none;
}

.fs-background-container {
  display: grid;
  grid-template-areas: 'fs-background-stack';
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 0;
  overflow: hidden;
}

.fs-background-media {
  grid-area: fs-background-stack;
  min-height: 0;
  min-width: 0;
  z-index: 1;
  background-position: center;
  background-size: cover;
  opacity: 0;
  transition: opacity var(--fs-background-duration) linear;
}

.fs-background-media img,
.fs-background-media video,
.fs-background-media iframe {
  width: 100%;
  height: 100%;
  display: block;
  -webkit-user-drag: none;
}

.fs-background-media video {
  object-fit: cover;
  object-position: center;
}

.fs-background-media iframe {
  z-index: 0;
}

.fs-background-image,
.fs-background-video {
  width: 100%;
  height: 100%;
}

.fs-background-embed {
  aspect-ratio: 16 / 9;
  align-self: center;
  justify-self: center;
  min-height: 100%;
  min-width: 100%;
}

.fs-background-embed:after {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  content: '';
}