body {
  margin-top: 105px;
}

.navbar {
  box-shadow: 2px 2px 5px #123c73;
  opacity: 0.9;
  background: #fff;
}
.navbar .nav-item {
  font-size: 1.4rem;
  padding-right: 1.4rem;
}

#showcase {
  position: relative;
  background: url("../img/stj1.jpg") no-repeat center center fixed;
  min-height: 540px;
}
#showcase .primary-overlay {
  background: rgba(18, 60, 115, 0.7);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.info-header {
  width: 50%;
  margin: auto;
  border-bottom: 1px #ddd solid;
}

#authors img {
  margin-top: -50px;
}
#authors .card:hover {
  background: #123c73;
  color: #fff;
}
#authors .fab {
  color: #fff;
}

@media (max-width: 768px) {
  #showcase {
    min-height: 500px;
  }
  #showcase h1 {
    font-size: 4rem;
  }

  .mb-resp {
    margin-bottom: 1rem;
  }
}
/*dropdown submenu*/
.dropdown-submenu {
    position: relative;
}

    .dropdown-submenu a::after {
        transform: rotate(-90deg);
        position: absolute;
        right: 6px;
        top: .8em;
    }

    .dropdown-submenu .dropdown-menu {
        top: 0;
        left: 100%;
        margin-left: .1rem;
        margin-right: .1rem;
    }