#preview-wrap {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow: hidden;
  /* To prevent huge blank space under the scaled element, set a scaled height */
  height: calc(915px * 0.7);
}

.preview-container {
  width: 412px;
  height: 915px;
  margin: 0 auto;
  border-radius: 36px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  position: relative;
  background: #000;
  border: 14px solid #1a1a1a;
  transform: scale(0.7);
  transform-origin: top center;
}

.preview-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
}