.flex-ac{
    display: flex;
    align-items: center;
}
.flex{
    display: flex;
}
.flex-js-ac{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.flex-js-ac-c{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.red_btn{
    background-color: #FB5554;
    padding: 4px 8px;
    border-radius: 4px;
    color: white;
}
.blue_btn{
    background-color: #016FD1;
    padding: 4px 8px;
    border-radius: 4px;
     color: white;
}
.green_btn{
    background-color: #4ED878;
    padding: 4px 8px;
    border-radius: 4px;
     color: white;
}
.margin-l{
    margin-left: 10px;
}
.margin-t{
    margin-top: 10px;
}
.margin-r{
    margin-right: 10px;
}
.margin-b{
    margin-bottom: 10px;
}
.p-20{
    padding: 20px;
}