/**/

.mount {
  display: flex;
  justify-content: center;
  align-items: center;

}

nav {
    display:flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom:50px;
    border-bottom:5px solid rgb(135, 206, 250);
}
nav *:last-child{
    min-width:50px;

}
nav *:first-child{
    min-width:50px;
}
nav h1 {
    font-size:20px;
}
#menu button {
    width:60%;
    height:100px;
    padding:1px;
    align-items: center;
    margin-bottom:20px;
    border-radius:10px;  
    background-color:rgb(135, 206, 250);
}
#menu {
    margin-top:50px;
    display:flex;
    flex-direction: column;
}
a{
    color:inherit
}
a:visited{
    color:inherit
}
#mount {
    width:100%;
    max-height:200px;
    overflow: hidden;
    margin-bottom:10px;
    text-align: center;
}
#mount img {
    width:80%;
}
#explain{
    padding:10px;
    height:20px;
    border:dashed 1px　;
}
#license {
    font-size:10px;
}

.btn-square {
  display: inline-block;
  width: 50%;
  padding: 1em;
  margin-bottom:30px;
  text-decoration: none;
  background: rgb(135, 206, 250);/*ボタン色*/
  color: black;
  border-bottom: solid 4px #627295;
  border-radius: 3px;
}
.btn-square:active {
  /*ボタンを押したとき*/
  -webkit-transform: translateY(4px);
  transform: translateY(4px);/*下に動く*/
  border-bottom: none;/*線を消す*/
}
img {
  width: 100%;
}