.fa-youtube{
    color:red;
    font-size: 50px;
}

.page-top{
    background-image: url(../img/title_image_cl.jpg);
    background-position-x: center;
    background-repeat: repeat-x;
 }

 .base {
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
  }
  .class1 {
    height: 30%;
  }
   
  .class2 {
    display: flex;
    flex-direction: row;
    height: 70%;
  }
   

@media screen and(max-width: 480px) {
    img {
    border: 0;
    }
 }

 @media screen and(min-width: 1280px) {
    img {
    border: 1px solid red;
    }
}




/* styles.css */
iframe {
  width: 100%;
  height: auto; /* 例: 適切な高さを設定してください */
  box-sizing: border-box;
  border: 0px solid #ccc;
  margin-bottom: 0px; /* iframe間の余白を設定 */
}

.top-iframe {
  height: 115px; /* 上部iframeの高さを設定 */
}

.bottom-iframe-container {
  display: flex;
  flex-wrap: wrap;
  height: 100%;
}

.left-iframe {
  flex:35%;
  margin-right: 0%; /* 左右のiframe間の余白を設定 */
}

.right-iframe {
  flex: 15%;
}



@media screen and (max-width: 960px) {
  .top-iframe {
      height: 115px; /* スマートフォン用の上部iframeの高さを設定 */
  }

  .left-iframe{
    flex: 0 0 100%;
    margin-right: 0;
    width: 100%;
  }
  .right-iframe {
      flex: 30%;
      margin-right: 0;
   }
}


.margen0{
  margin: 0;
}

#foot{
  position:fixed;
  right: 0px;
  bottom: 0px;
}

a {
  color:inherit;
  text-decoration: none;
}

.menu-box{
  margin: auto;
  padding: 0%;
  background-color: rgb(153, 190, 245);
  text-align: center;
  width: 100px;
}

#menu-text{
  color: rgb(255, 255, 255);
  font-size: large;
  font-style: normal;
  font-weight: bold;
}



footer {
  width: 100%;
  height: 50px; 
  text-align: center;
  padding: 0.1em;
  background-color: #e78e6b;
}
#footer-text {
  color: #ffffff;
  font-weight: bold;
}

ul{
  list-style-type: square;
  font-size: large;  
  margin: auto;
  padding-bottom: auto;
}

li{
  margin-bottom: 10px;
}

.resizeimage img { width: 100%; }


<!--  ============= Block Button ============== -->
a.btn_01 {
	display: block;
	text-align: center;
	vertical-align: middle;
	text-decoration: none;
	width: 160px;
	margin: 0px;
	padding: 0rem 0rem;
	font-weight: bold;	
	border: 2px solid #27acd9;
	color: #27acd9;
	font-size: 16pt;
	transition: 0.2;
}
a.btn_01:hover {
	color: #fff;
	background: #27acd9;
}

a.btn_02 {
	display: block;
	text-align: center;
	vertical-align: middle;
	text-decoration: none;
	width: 100px;
	margin: 0px;
	padding: 0rem 0rem;
	font-weight: bold;
	border: 2px solid darkorange;
	color: darkorange;
	font-size: 16pt;
	transition: 0.2s;
	background: white;
}
a.btn_02:hover {
	color: #fff;
	background: darkorange;
}

/* letter color red when mouse touch use div*/
.h-red:hover {
  color: red;
}

/* letter color red and bold when mouse touch */
a:hover{
  color: red;
  font-weight: bold;
}


/*top、left 、bottom 、right*/
h3{
  	margin: 10px 10px 1px 5px;
	padding: 1px;
}

h2{
  	margin: 10px 10px 10px 5px;
	padding: 1px;
}





.scroller {
  overflow: scroll;
  height: 100px;
  padding: 10px;
  margin-bottom: 5px;
  width: 400px;
  border: 1px solid orange;
}