body {
  margin-top: 5%;
}

.logo {
  padding-bottom: 15px;
}

.logo > img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.margin-bottom {
  margin-bottom: 1em;
}

@media (max-width: 767px) {
  .table-responsive .dropdown-menu {
    position: static !important;
  }
}
@media (min-width: 768px) {
  .table-responsive {
    overflow: visible;
  }
}

@media (min-width: 768px) {
  .navbar .navbar-nav {
    display: inline-block;
    float: none;
    vertical-align: top;
  }

  .navbar .navbar-collapse {
    text-align: center;
  }
}