h1 {
  font-weight: bold;
}

.jumbotron h5 {
  font-size: 1.1rem;
}

#useful-buttons {
  display: flex;
  margin-top: 16px;
}

.nav-item {
  transition: color 0.1s ease, background-color 0.1s ease;
}

.nav-item:hover {
  background-color: #E9ECEF;
}

.navbar .navbar-collapse .navbar-nav>li>a:hover {
  color: #343A40;
}

a {
  color: #181c21;
  font-weight: bold;
  transition: color 0.15s ease, text-decoration 0.15s ease;
}

a:hover {
  color: #808080;
  font-weight: bold;
}

.forbidden {
  cursor: not-allowed !important;
  background-color: #bbb !important;
  border-color: #bbb !important;
  color: #181c21 !important;
}

.btn-dark {
  border-radius: 0.5rem;
}

.btn-dark:hover {
  background-color: #bbb;
  border-color: #bbb;
  color: #181c21;
  font-weight: normal;
}

.navbar .navbar-collapse .navbar-nav>li>a.section-active {
  background-color: #E9ECEF;
  color: #343A40;
  font-weight: bold;
}

/* Header section */
#head-authors {
  font-size: 1em;
  margin-top: 2em;
  margin-bottom: 1.5em;
}

#head-subtitle {
  font-size: 1.2em;
}

#head-affiliations {
  display: block;
  margin-bottom: 1.5em;
}

.affiliation {
  margin: 0;
  font-size: 0.85em;
}

/* Abstract section */
.abstract-paragraph {
  text-align: justify;
}

/* Contributors section */
#contributors .col-lg-4 {
  margin-bottom: 1.5rem;
  text-align: center;
}

#contributors img {
  margin-bottom: 15px;
  opacity: 1;
  transition: opacity 0.15s ease-in-out;
}

#contributors img:hover {
  opacity: 0.8;
}

/* Footer section */
#footer {
  margin-top: 3em;
  padding: 2em 0;
  background-color: #343A40;
  color: white;
}

#footer .col-md-4 {
  margin-bottom: 20px;
}

#footer a {
  color: #FFFFFF;
  font-weight: bold;
}

#footer a:hover {
  color: #808080;
  font-weight: bold;
}

.container {
  padding-top: 70px;
}

.footer-container {
  padding-top: 0;
}

/* Citation section */
.citation {
  background-color: #E9ECEF;
  padding: 20px 40px;
  border-radius: 16px;
}

.jumbotron {
  padding: 4rem 2rem 2rem 2rem;
  margin-bottom: 0;
}

.jumbotron .container {
  padding: 0;
}

#links a {
  margin-top: 10px;
  transition: background-color 0.15s ease, font-weight 0.15s ease;
}

#overview-legend {
  font-style: italic;
  text-align: center;
  font-size: 0.85em;
  margin-top: 20px;
}

.skip-bottom {
  margin-bottom: 1.5em;
}

.skip-bottom-2 {
  margin-bottom: 3em;
}

iframe {
  border-radius: 16px;
}

/* Other links section */
#other-links {
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  margin: auto;
  max-width: 15vw;
  z-index: 1;
}

#other-links>button {
  width: 100%;
  font-weight: bold;
  background-color: #E9ECEF;
  color: #181c21;
  padding: 4px 8px;
}

.other-link-item {
  display: none;
}

.other-link-item:hover {
  background: #d8dbde;
  border-radius: 4px;
}

.visible-link {
  display: block;
  line-height: 1.75rem;
}