body { padding: 0; margin: 0 }
#unity-container { position: absolute }
#unity-container.unity-desktop { left: 50%; top: 50%; transform: translate(-50%, -50%) }
#unity-container.unity-mobile { width: 100%; height: 100% }
#unity-canvas { background: #231F20 }
.unity-mobile #unity-canvas { width: 100%; height: 100% }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none }
#unity-logo { width: 154px; height: 130px; background: url('unity-logo-dark.png') no-repeat center }
#unity-progress-bar-empty { width: 141px; height: 18px; margin-top: 10px; background: url('progress-bar-empty-dark.png') no-repeat center }
#unity-progress-bar-full { width: 0%; height: 18px; margin-top: 10px; background: url('progress-bar-full-dark.png') no-repeat center }
#unity-footer { position: relative }
.unity-mobile #unity-footer { display: none }
#unity-webgl-logo { float:left; width: 204px; height: 38px; background: url('webgl-logo.png') no-repeat center }
#unity-build-title { float: right; margin-right: 10px; line-height: 38px; font-family: arial; font-size: 18px }
#unity-fullscreen-button { float: right; width: 38px; height: 38px; background: url('fullscreen-button.png') no-repeat center }
#unity-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none }


/* 追記分 */

p.attention{
display: none;
}
#backbtn{
   position: absolute;
   top: 20px;
   left: 20px;
}
a.btn-flat {
    overflow: hidden;
    text-decoration: none;
    font-weight: 700;
    padding: .5rem 3.5rem;
    color: #fff;
    background: #000;
  }
  
  a.btn-flat span {
    position: relative;
    z-index: 1;
  }
  
  a.btn-flat:before {
    position: absolute;
    top: 0;
    left: calc(-150% + 50px);
  
    width: 150%;
    height: 500%;
  
    content: '';
    -webkit-transition: all .5s ease-in-out;
    transition: all .5s ease-in-out;
    -webkit-transform: rotate(45deg) translateX(0) translateY(0);
    transform: rotate(45deg) translateX(0) translateY(0);
  
    background: #fff100;
  }
  
  a.btn-flat:after {
    position: absolute;
    top: -400%;
    right: calc(-150% + 50px);
  
    width: 150%;
    height: 500%;
  
    content: '';
    -webkit-transition: all .5s ease-in-out;
    transition: all .5s ease-in-out;
    -webkit-transform: rotate(45deg) translateX(0) translateY(0);
    transform: rotate(45deg) translateX(0) translateY(0);
  
    background: #fff100;
  }
  
  a.btn-flat:hover{
    color: #333;
  }
  a.btn-flat:hover:before {
    -webkit-transform: rotate(45deg) translateX(0) translateY(-50%);
    transform: rotate(45deg) translateX(0) translateY(-50%);
  }
  
  a.btn-flat:hover:after {
    -webkit-transform: rotate(45deg) translateX(0) translateY(50%);
    transform: rotate(45deg) translateX(0) translateY(50%);
  }
  
@media screen and (max-width: 1100px){
#unity-container{
    display: none;
}
p.attention{
    font-size: 2rem;
    display: block;
    width: 90%;
    text-align: center;
    position: absolute;
    top: 40%;
    left: 50%;
transform: translateY(-50%) translateX(-50%);
}
#backbtn{
    top: calc(60% + 5rem);
    left: 50%;
    transform: translateY(-50%) translateX(-50%);}
a.btn-flat span{
    font-size: 2rem;
}
a.btn-flat {
    padding: 1.5rem 6.5rem;
    
  }

}