body {
  font-family: -apple-system, blinkMacSystemFont, /* Macの欧文はSan Francisco (OS X 10.11以降) */
               'Helvetica Neue', /* Macの欧文 (OS X 10.10以前) */
               'Segoe UI',       /* Windowsの欧文 */
               YuGothicM,        /* Windows8.1以上は游ゴシック */
               YuGothic,         /* Macの游ゴシック */
               Meiryo,           /* 游ゴシックが入っていないWindows */
               sans-serif;
	background-color: #E7F6F1;
}



a:hover{
  color:#A000FF;
}

div.block_a{
    float:top;
    height:80px;
}

div.block_a2{
    float:top;
    height:80px;  
}

div.block_b{
    float:left;
    width:160px;
    margin-top:25px;
}

div.block_c{
    float:left;
    width:740px;
    margin-left:10px;
}

@media only screen and (max-width: 540px) {
    div.block_b{
	    float:left;
	    width:160px;
	    margin-top:25px;
	    font-size: 32px;	    
	}
}



h1 {
	text-align: center; 
	background-color: #4Ba987; 
	color: #ffffff; 
	font-size: 200%;"
	
}

h2 {
	text-align: center; 
	background-color: #90D0B9;
	color: #000000;"
	margin-bottom: 40px;
}

h3 {
	text-align: center; 
	background-color: #90D0B9;
	color: #000000;"
	margin-bottom: 25px;
}




.list-style-none
{
	list-style: none;
}

.left-float
{
	float: left;
}

.clear-float
{
	clear: both;
}

.display_unit
{
	display: none;
	margin: 0px 5px 40px 5px;
}

@media (min-width: 800px)
{
	.book_image{
		width: 256px;
		border: solid 2px #000000;
		margin: 10px 10px 10px 10px;
	}
	div.block_d{
	    float:left;
	    width:280px;
	    margin-top:5px;
	}
	div.block_e{
	    float:left;
	    width:460px;
	    margin-top:5px;
	}
}

@media (max-width: 799px)
{
	.book_image{
		width: 128px;
		border: solid 2px #000000;
		margin: 10px 10px 10px 10px;
	}
	div.block_d{
	    float:left;
	    width:150px;
	    margin-top:5px;
	}
	div.block_e{
	    float:left;
	    width:260px;
	    margin-top:5px;
	}
}

.hlink
{
	color: blue;
	text-decoration: underline;
}

.spacer40
{
	margin-bottom: 40px;
}

.img-item
{
	width: 100%;
}

.scroll_box {
  width: calc(100% - 20px);                /* 横幅を200pxに指定 */
  height: 300px;               /* 横幅を200pxに指定 */
  border: 1px solid #000;      /* わかりやすくボーダーを引く */
  overflow-y: scroll;          /* 縦方向にスクロール可能にする */
  margin: 20px 0 20px 0;
  padding: 10px;
  background-color: white;
}

.gradation_box {
 width: calc(100% - 20px); 
  display: inline-block;
  position: relative;
  height: 530px;
  overflow: hidden;
  //overflow-y: scroll; 
  border: 1px solid;
  margin: 20px 0 20px 0;
  padding: 10px;
  background-color: white;
}

.gradation_box:before {
  content: "";
  position: absolute;
  border-style none;
  left: 0;
  bottom: 20px;
  z-index: 2;
  width: 300%;
  height: 150px;
  background: linear-gradient(rgba(255,255,255,0) 0, #fff 150px);   
}


.cat_item {
	display:none;
	margin-bottom: 40px;
}

.cat_image {
	max-height: 128px;
	margin-bottom: 20px;
}