body{
    margin:0;
    padding:0;
    box-sizing: border-box;
}
.progress_bar{
    transform: scaleX(0);
}

::-webkit-scrollbar{
    width:5px
}
::-webkit-scrollbar-track{
    background-color: lightgray;
}
::-webkit-scrollbar-thumb{
    background-color: gray;
}
::-webkit-scrollbar-thumb:hover{
   background-color:black
}