body{
  padding:0;
  margin:0;
  background:#c2c8c8;
}

.inner-container{
  width:400px;
  height:400px;
  position:absolute;
  top:calc(50vh - 200px);
  left:calc(50vw - 200px);
  overflow:hidden;
  background:#219ba3;
}

.box{
  position:absolute;
  height:100%;
  width:100%;
  font-family:Helvetica;
  color:#fff;
  background:rgba(0,0,0,0.13);
  padding:30px 0;
}
.box h1{
  text-align:center;
  margin:30px 0;
  font-size:30px;
}
.box input{
  display:block;
  width:300px;
  margin:20px auto;
  padding:15px;
  background:rgba(0,0,0,0.2);
  color:#fff;
  border:0;
  ime-mode:disabled;
}

.box input:focus,.box input:active,.box button:focus,.box button:active{
  outline:none;
}

.box button{
  background:#2ecc71;
  border:0;
  color:#fff;
  padding:10px;
  font-size:20px;
  width:330px;
  margin:20px auto;
  display:block;
  cursor:pointer;
}
.box button:active{
  background:#27ae60;
}
.box p{
  font-size:14px;
  text-align:center;
}
.box p span{
  cursor:pointer;
  color:#666;
}