body{
  margin: 0px;
  background: red;
}


header{
  height: 80px;
  width: 100%;
  opacity: 0.9;
  background-color: black;
  position: fixed; top:0px;
  z-index: 10;
}

.header-left img{
  width: 280px;
  margin: 12px 40px;
  float: left;
}

.header-right{
  background-color: #B40000;
  width: 150px;
  text-align: center;
  font-size: 24px;
  font-weight: bold;
  line-height: 80px;
  margin: 0px 40px;
  float: right;
  display: block;
}

.header-right a{
  color: white;
  text-decoration: none;
}

.header-right:hover{
  background-color: #FF0000;
  cursor: pointer;
  transition: all 0.5s;
}

#slide-back{
  background-color: red;
  height: 1500px;
}

main{
  background-color: white;
  height: 100%;
  width: 900px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}

.kara{
  height: 10px;
}

.kokuchi{
  line-height: 32px;
  margin-top: 140px;
}

.kokuchi h1{
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 50px;
  color: #B40000;
  margin: 20px;
}

.kokuchi span{
  color: #B40000;
}

.kokuchi a{
  color: black;
  font-weight: bold;
  font-size: 28px;
  text-decoration:none;
  border-bottom: 8px solid #FFDC00;
  padding-bottom: 4px;
}

.copy{
  font-size: 14px;
  color: #787878;
}