.img-center {margin:0 auto;}
.bk-mha {
  background: url(../images/monitor.jpg) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.vertical-align {
    display: flex;
    align-items: center;
}

.bs-linebreak {
  height:10px;
}