body {
  font-size: .875rem;
}

.feather {
  width: 16px;
  height: 16px;
  vertical-align: text-bottom;
}

/*
 * Sidebar
 */

.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100; /* Behind the navbar */
  padding: 48px 0 0; /* Height of navbar */
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
}

.sidebar-sticky {
  position: relative;
  top: 0;
  height: calc(100vh - 48px);
  padding-top: .5rem;
  overflow-x: hidden;
  overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
}

@supports ((position: -webkit-sticky) or (position: sticky)) {
  .sidebar-sticky {
    position: -webkit-sticky;
    position: sticky;
  }
}

.sidebar .nav-link {
  font-weight: 500;
  color: #333;
}

.sidebar .nav-link .feather {
  margin-right: 4px;
  color: #999;
}

.sidebar .nav-link.active {
  color: #007bff;
}

.sidebar .nav-link:hover .feather,
.sidebar .nav-link.active .feather {
  color: inherit;
}

.sidebar-heading {
  font-size: .75rem;
  text-transform: uppercase;
}

/*
 * Content
 */

[role="main"] {
  padding-top: 133px; /* Space for fixed navbar */
  margin-left: auto;
}

@media (min-width: 768px) {
  [role="main"] {
    padding-top: 48px; /* Space for fixed navbar */
  }
}

/*
 * Navbar
 */

.navbar-brand {
  padding-top: .75rem;
  padding-bottom: .75rem;
  font-size: 1rem;
  background-color: rgba(0, 0, 0, .25);
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .25);
}

.navbar .form-control {
  padding: .75rem 1rem;
  border-width: 0;
  border-radius: 0;
}

.form-control-dark {
  color: #fff;
  background-color: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .1);
}

.form-control-dark:focus {
  border-color: transparent;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, .25);
}

.index_groot {
  font-weight: bold;
  font-size: 18px;
}

/* buttons */
.button_wrapper {
  width: 100%;
  margin-top: 5px;
  margin-bottom: 5px;
}
#button_previous {
  float: left;
}
#button_next {
  float: right;
}

.navbutton {
  -moz-box-shadow:inset 0px 1px 0px 0px #ffffff;
  -webkit-box-shadow:inset 0px 1px 0px 0px #ffffff;
  box-shadow:inset 0px 1px 0px 0px #ffffff;
  background:-webkit-gradient( linear, left top, left bottom, color-stop(0.05, #f9f9f9), color-stop(1, #e9e9e9) );
  background:-moz-linear-gradient( center top, #f9f9f9 5%, #e9e9e9 100% );
  filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#f9f9f9', endColorstr='#e9e9e9');
  background-color:#f9f9f9;
  -webkit-border-top-left-radius:28px;
  -moz-border-radius-topleft:28px;
  border-top-left-radius:28px;
  -webkit-border-top-right-radius:28px;
  -moz-border-radius-topright:28px;
  border-top-right-radius:28px;
  -webkit-border-bottom-right-radius:28px;
  -moz-border-radius-bottomright:28px;
  border-bottom-right-radius:28px;
  -webkit-border-bottom-left-radius:28px;
  -moz-border-radius-bottomleft:28px;
  border-bottom-left-radius:28px;
  text-indent:0;
  border:2px solid #dcdcdc;
  display:inline-block;
  color:#666666;
  font-family:Arial;
  font-size:15px;
  font-weight:bold;
  font-style:normal;
  height:50px;
  line-height:50px;
  width:150px;
  text-decoration:none;
  text-align:center;
  text-shadow:1px 1px 0px #ffffff;
}
.navbutton:hover {
  background:-webkit-gradient( linear, left top, left bottom, color-stop(0.05, #e9e9e9), color-stop(1, #f9f9f9) );
  background:-moz-linear-gradient( center top, #e9e9e9 5%, #f9f9f9 100% );
  filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#e9e9e9', endColorstr='#f9f9f9');
  background-color:#e9e9e9;
}.navbutton:active {
  position:relative;
  top:1px;
}