body {
  font-family: 'Avenir','Helvetica Neue','Helvetica','Arial','Hiragino Sans','ヒラギノ角ゴシック',YuGothic,'Yu Gothic','メイリオ', Meiryo,'ＭＳ Ｐゴシック','MS PGothic';
  width: 100%;

  background-color: #EEEEEE;
}
header{
  background-color: #FEFEFE;
  font-size: 2.5em;
  text-align: center;
  width: 90%;
  display: block;
  margin:auto;
}
.header{
  text-decoration: none;
  color: #000000;
}
h1{
  text-align: center;
  font-size:3em;
}

h2{
  position: relative;
  background: #f1f8ff;
  padding: 0.25em 0.5em;
  border-left: solid 2em #5c9ee7;
  box-shadow: 2px 2px 4px gray;
  font-size: 1.5em;
  margin: 30px 30px;
}

h2:before{
  font-family: "Font Awesome 5 Free";
  content: "\f00c";
  position: absolute;
  padding: 0em;
  color: white;
  left: -1.5em;
  top: 50%;
  -moz-transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
}

h3{
  padding: 0.25em 0.5em;/*上下 左右の余白*/
  color: #494949;/*文字色*/
  background: transparent;/*背景透明に*/
  border-left: solid 5px #7db4e6;/*左線*/
  font-size: 1.3em;
  margin: 30px 30px;
}

#thumbnail{
  text-align:center;
}

#thumbnail img{
  width: 300px;
}
p{
  line-height: 1.7;
  font-size: 1.2em;
  margin: 10px 30px 10px 30px;
  padding: 10px 10px;
}
img{
  width:40%;
  padding: 0;
  display: block;
  margin: 20px auto;
  box-shadow: 2px 2px 4px gray;
}


.content{
  display: block;
  width: 90%;
  background-color:#FEFEFE;
  border-radius: 10px;
  margin: auto;
}
nav{

}
.nav{
  width: 300px;
  margin: 10px auto;
  list-style: none;
  overflow: hidden;
  padding-left: 5%;
}
.nav li{
  float: left;

  border-right:1px solid #DDD;

}
.nav li a{
  display: block;
  padding: 10px 15px;
  text-align: center;
  text-decoration: none;
  color: #333;
  height: 30px;
}
.nav li a:hover{
  background: #DDD;
}
.material{
  /*text-align: center;*/
  display: block;
  margin: auto;
}
.Home{
  display: block;
  padding: 100px 0px;
}
.Home p{
  text-align: center;
}
.Home a{
  text-decoration: none;
  color: #111111;
}
.movie{
  width: 50%;
  margin: auto;
  display: block;
}
video{
  display: block;
  max-width: 100%;
  margin: 0 auto;
}
li{
  font-size: 1.2em;
}