.reg_input{
    position:relative;
    text-align: center;
    padding:6px;
    border:0px;
    border-bottom:1px solid gray;
    width:40px;
    color:#2a2a2a;
    border:1px solid #2a2a2a;
    text-align: center;
}
#dmy_select{
    padding:6px;
    background:rgb(231, 231, 231);
    color:#2a2a2a;
    border:1px solid #2a2a2a;
}
.i_text_trace{
    position:relative;
    display:inline-flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    font-weight: bold;
}
#calculate_btn{
    padding:7px;
    background:rgb(216, 218, 219);
    color:#2a2a2a;
    transition:all 300ms ease-out;
    transform:scale(1);
    border: 1px solid gray;
    border-radius: 6px;
    cursor:pointer;
}
#calculate_btn:hover{
    transform:scale(1.02);
}
#calculate_btn:active{
    transform:scale(0.98);
    background:rgb(239, 241, 243);
}