body *{
   font: normal normal 400 16px/1.6 Courier, sans-serif;
   box-sizing: border-box;
}
.box{
   display: table;
   margin: 25px auto;
}
input[type='checkbox']{
   display: none;
}

.wrapper, .label, .button{
   display: block;
}
.wrapper{
   position: relative;
   user-select: none;
   cursor: pointer;
}
.label, .button{
   position: absolute;
   transition: all 0.28s ease;
}

.wrapper{
   width: 120px;
   height: 40px;
   border: 2px solid #aaa;
   border-radius: 20px;
   overflow: hidden;
}
.label{
   top: 0;
   left: 0;
   z-index: 1;
   
   width: 200%;
   height: 100%;
   background: #ddd;
}
.label-off, .label-on{
   display: block;
   position: absolute;
   top: 0;
   width: 50%;
   height: 100%;
   font: normal normal 700 18px/2 Monospace;
   letter-spacing: 0px;
}
.label-off{
   left: 0;
   color: #aaa;
   background: #eee
}
.label-on{
   left: 50%;
   color: #fff;
   background: #ffcab5;
   text-align: right;
}

.button{
   top: 50%;
   left: 90%;
   transform: translate(-100%, -50%);
   z-index: 2;
   
   width: 32px;
   height: 32px;
   border: 2px solid #aaa;
   border-radius: 50%;
   background: #fff;
}
input[type='checkbox']:checked + .wrapper .label{
   left: -100%;
}
input[type='checkbox']:checked + .wrapper .button{
   left: 10%;
   transform: translate(0%, -50%);
}

#toPage2{
   display: block;
   position: absolute;
   left: 50%;
   top: 40%;
   transform: translate(-50%, -50%);
   font-size: 1rem;
   padding: 1.5rem 0 0 0;
   border-bottom: 1px solid darkblue;
}



/*** back to home ***/
a.backToHome{
   display: block;
   position: absolute;
   bottom: 5rem;
   left: 50%;
   transform: translateX(-50%);
   text-align: center;
   font: normal normal 400 1rem/1.4 monospace;
   cursor: pointer;
   user-select: none;
   
   border-bottom: 1px solid darkblue;
   color: orange;
}