body {
     background: linear-gradient(to top, rgba(0,153,255,0.5), #009);
     background-color: black;
     font-size: 15px;
     font-family: "メイリオ"," Meiryo", "Hiragino Kaku Gothic Pro", "ヒラギノ角ゴ Pro W3", "ＭＳ Ｐゴシック", "Lucida Grande", "Lucida Sans Unicode", "Arial", "Verdana",             "sans-serif";
     margin: 0px auto;
     width:80%;
}

article {
       background-color: white;
       display: block;
       padding-left: 50px;
       padding-right: 50px;
       padding-top:10px ;
       text-align:center;
       min-height:500px;
       height:auto !important;
       height:500px;
  }

footer {
     background-color: black;
     color: white;
     height: 34px;
     text-align: center;
    // width:1000px;
}

header {
     background-color: black;
     color: white;
     height: 40px;
     line-height: 40px;
     text-align: center;
    // width:1000px;
}
header h3 {
     margin: 0px auto;
     text-align: center;
     color: white;

}

nav {
     background: lightblue;
     color: white;
     display: block;
     height: 30px;
     line-height: 30px;
   //  margin: 0px auto;
     padding: 0px;
     text-decoration: none;
}


nav ul, nav li {
    list-style-type:none;
     margin : 0px auto;
}

ul#Nav001 li {
     font-size: 13px;
}

ul#Nav001 li a {
     background: url(../pic/yajirushi.gif) no-repeat 0px 0px;
     color: #666;
     height: 20px;
     margin-left: 17px;
     padding-left: 22px;
     padding-top: 2px; 
     text-decoration: none;
}

ul#Nav001 li a:hover {
     background: url(../pic/yajirushi.gif) no-repeat 2px 0px;
     color: #F90;
}
 
article {
     background-color: white;
     display: block;
     padding-left: 20px;
     padding-right: 20px;
     padding-top:10px ;
     text-align: left;
     color:darkblue;
}


hr {
      	border-top: 3px double #bbb;
      	border-color:pink;
     }

hr.short {
	border-top: 1px dotted #8c8b8b;
    border-color:green;
    width:60%;
    margin-left:10px;
}


.green{
    color:green;
 }
 
article h3 {
     margin: 20px;
     text-align: center;
     color:blue;
}

h4{
  margin-left:100px;
  }
  
.small{
  font-size:x-small;
}  
#maegaki{
  margin:10px 40px 10px 40px;
  }
 
.bunsho{
   margin:10px 50px 10px 50inputpx;

}  
img#body, img#height3 {
     float:left;
     margin:10px;
  }  

img#formula{
   float:right;
}

.center{
   text-align :center;
 }  
 
.left150{
     margin-left:150px;
     margin-right:50px;
  } 
.left100{
    margin-left:100px;
     margin-right:50px;
} 

.right100{
   margin-right:50px;
   } 
    
.bold{
   font-weight:bold;
  }
  
ol{
   margin-left:200px;
   }     