sisweb/src/assets/css/login.scss

.bg{
  background-image: src('@/assets/images/login.jpg');
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.tab{
  margin-top: 13%;
  width: 330px;
  border: 1px solid #000000;
}