body {
  padding-top: 50px;
}
.sidebar {
    background-color: #f5f5f5;
    position: fixed;
    display: block;
    top: 51px;
    bottom: 0;
    left: 0;
    padding: 20px;
}

.main {
    padding: 20px;
}


@media print {
  a[href]:after {
    content: none;
  }
}