.ifrm-wrap{
  min-width: 280px;
  max-width: 800px;
  background-color: #6666ff;
  margin: 0 auto;
  position: relative;
  width: 100%;
  padding: calc(820/700*100%) 0 0;
}

.ifrm-wrap iframe{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/*-- 予報用語用のcss --*/
#main {
  background-color: #fff;
  padding: 1em;
}


dl {
	margin-left: 2em;
}

dt {
	font-weight: bold;
	margin-top: 1.2em;
}

dd {
	margin-left: 1em;
}


ul{
	margin-left:3em;
}

.hint {
	font-size: small;
}

@media screen and (min-width:501px) and (max-width: 700px) {
  .ifrm-wrap iframe {
    width: 150%;
    height: 150%;
    -moz-transform: scale(0.67,0.67);
    -webkit-transform: scale(0.67,0.67);
    -o-transform: scale(0.67,0.67);
    -ms-transform: scale(0.67,0.67);
    transform-origin:0 0;
    -o-transform-origin:0 0;
    -webkit-transform-origin:0 0;
    -moz-transform-origin:0 0;
    -ms-transform-origin:0 0;
  }
}

@media screen and (max-width: 500px) {
  .ifrm-wrap iframe {
    width: 200%;
    height: 200%;
    -moz-transform: scale(0.5,0.5);
    -webkit-transform: scale(0.5,0.5);
    -o-transform: scale(0.5,0.5);
    -ms-transform: scale(0.5,0.5);
    transform-origin:0 0;
    -o-transform-origin:0 0;
    -webkit-transform-origin:0 0;
    -moz-transform-origin:0 0;
    -ms-transform-origin:0 0;
  }
  #main {
     padding: 0;
  }
}