debian-mirror-gitlab/app/assets/stylesheets/generic/zen.scss

.zennable {
  position: relative;

  input {
    display: none;
  }

  .zen-enter-link {
    color: #888;
    position: absolute;
    top: -26px;
    right: 4px;
  }

  .zen-leave-link {
    display: none;
    color: #888;
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px;
    font-size: 36px;

    &:hover {
      color: #111;
    }
  }

  input:checked ~ .zen-backdrop .zen-enter-link {
    display: none;
  }

  input:checked ~ .zen-backdrop .zen-leave-link {
    display: block;
    position: absolute;
    top: 0;
  }

  input:checked ~ .zen-backdrop {
    background-color: white;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1031;

    textarea {
      border: none;
      box-shadow: none;
      border-radius: 0;
      color: #000;
      font-size: 20px;
      line-height: 26px;
      padding: 30px;
      display: block;
      outline: none;
      resize: none;
      height: 100vh;
      max-width: 900px;
      margin: 0 auto;
    }
  }

  .zen-backdrop textarea::-webkit-input-placeholder {
    color: white;
  }

  .zen-backdrop textarea:-moz-placeholder {
    color: white;
  }

  .zen-backdrop textarea::-moz-placeholder {
    color: white;
  }

  .zen-backdrop textarea:-ms-input-placeholder {
    color: white;
  }

  input:checked ~ .zen-backdrop textarea::-webkit-input-placeholder {
    color: #999;
  }

  input:checked ~ .zen-backdrop textarea:-moz-placeholder {
    color: #999;
    opacity: 1;
  }

  input:checked ~ .zen-backdrop textarea::-moz-placeholder {
    color: #999;
    opacity: 1;
  }

  input:checked ~ .zen-backdrop textarea:-ms-input-placeholder {
    color: #999;
  }
}