.chat_main {
    padding: 2em;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: scroll;
}

.chat_main::-webkit-scrollbar{
    background-color: transparent;
    width:10px;
    border: 5px solid transparent;
}
.chat_main::-webkit-scrollbar-track{
    border: solid 4px transparent;
}
.chat_main::-webkit-scrollbar-thumb{
    background-color: gray;
    border-radius: 20px;
}