snapchat_effect/effect.css at master · rsolci/snapchat_effect · GitHub

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body {
    max-width: 500px;
    margin: 0 auto
  }

  [style*=--bg][style*=--caption] {
    --alignment: 50%;
    margin: 1em auto;
    padding-bottom: 100%;
    position: relative;
    background: var(--bg) no-repeat center;
    background-size: contain;
    overflow: hidden;
  }
  [style*=--bg][style*=--caption]:before {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: var(--bg) no-repeat center;
    background-size: cover;
    filter: blur(10px);
    z-index: -1;
    transform: scale(1.1);
    opacity: 0.8;
  }
  [style*=--bg][style*=--caption]:after {
    content: var(--caption);
    display: block;
    width: 100%;
    height: 2em;
    line-height: 2em;
    position: absolute;
    top: var(--alignment);
    left: 0;
    font-size: 14pt;
    transform: translateY(-50%);
    background: rgba(0,0,0,.5);
    color: white;
    font-family: sans-serif;
    text-align: center;
  }