/* 共通（PC想定） */
.iframe-container {
  display: flex;
  justify-content: center;
  padding: 20px 0;
}

/* スマホ用 */
@media screen and (max-width: 768px) {
  .iframe-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .iframe-container iframe {
    width: 100%;
    height: 100%;
  }
}