@media screen and (max-width:640px){
    select{
        
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
    }
    .header_logo{
        text-align: center;
        font-size: 15px;
    }
    .header_logo2{
        text-align: center;
        width: 100%;
        position: relative;
        top: 0;

    }
    .header_logo2 img{
        text-align: center;
        width: 50%;
    }


}