/* ===== 共通リセット ===== */
html, body {
  margin: 0;
  padding: 0;
}

/* iframeの下にできる謎の隙間対策 */
iframe {
  display: block;
  border: none;
}

/* ===== Menu iframe ===== */
.inframe_Menu {
  width: 100%;
  height: 50px;

  background-image: url("../img/HEDER_BER.jpg");
  background-repeat: no-repeat;
  background-position: left center;

  background-size: auto 100%; /* ★これ */
}

/* ===== Body iframe ===== */
.inframe_body {
  width: 100%;
  height: calc(100vh - 50px);
}

}