.rounded-tr {
 position:absolute;top:0px;right:0px;
}

.rounded-tl {
 position:absolute;top:0px;left:0px;
}

.rounded-br {
 position:absolute;bottom:0px;right:0px;overflow: none;
}

.rounded-bl {
 position:absolute;bottom:0px;left:0px;overflow: none;
}