ui/src/Overview/style/index.module.less
.overview {
  position: relative;

  .iframe {
    background: var(--preview-color-bg-1);
  }

  &.fullscreen {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 9999;

    .iframe {
      position: absolute;
      left: 0;
      top: 0;
      width: 100% !important;
      height: 100% !important;
      padding: 20px;
    }

    .operationButtons {
      top: 20px;
      right: 20px;
    }
  }

  .operationButtons {
    display: flex;
    align-items: center;
    position: absolute;
    top: 0;
    right: 0;
    color: var(--color-text-2);
    opacity: 0;
    transition: opacity 0.1s ease-in-out;
    z-index: 1;

    .button {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      height: 24px;
      margin-left: 8px;
      padding: 0;
      border: 1px solid #f2f3f51a;
      border-radius: 2px;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(8px);
      box-shadow: 0 2px 4px 0 #1f23291a;
      cursor: pointer;

      &:hover {
        background: rgba(255, 255, 255, 0.15);
      }

      &:active {
        background: rgba(255, 255, 255, 0.2);
      }

      svg {
        display: inline-block;
        color: inherit;
      }
    }
  }

  &:hover {
    .operationButtons {
      opacity: 1;
    }
  }
}