.center-frame{
height:300px;
width:100%;
overflow-y:scroll;
}
.center-frame::-webkit-scrollbar{
width: 8px;
height: 16px;
background-color: #F5F5F5;
}
.center-frame::-webkit-scrollbar-track{
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
border-radius: 10px;
background-color: #F5F5F5;
}
.center-frame::-webkit-scrollbar-thumb{
border-radius: 10px;
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);
background-color: #555;
}
