@media only screen and (max-width: 650px) {
    .btn {
        padding:30px;
        margin:10px;
    }
    
    .btn button{
        font-size: 4.5vw;
    }
    #box{
        left:15vw;
        position: relative;
        width:70vw;
        height:55vh;
    }
    .inputbox{
        width:68vw;
    }
    .inputbox input{
        font-size: 4.5vw;
    }
    .last-btn{
        padding:30px;
        margin:-10vw;
        margin-left:5vw;
    }
    .last-btn button{
        font-size: 4.5vw;
    }
    .last-btn h1{
        left: -5vw;
        position: relative;
        font-size: 4.5vw;
    }
    #sec_box{
        left:10vw;
        position:relative ;
        width:70vw;
        height:70vh;
    }
    .four_input input{
        width:60vw;
        font-size: 3.5vw;
    }
    #sec_box button{
        padding:10px;
        margin-left:20vw;
        font-size: 3.5vw;
    }
}