html {
  scroll-behavior: smooth;
}

header {
  margin-top: 2rem;
  margin-bottom: 4rem;
  padding-left: 1rem !important;
  padding-right: 1rem !important;
  box-sizing: border-box;
  margin-right: 0;
}

header div {
  text-align: center;
}

header a {
  display: inline-block;
  text-align: center;
  font-size: 1.5rem;
  position: relative;
}

header a::after {
  content: '';
  display: inline-block;
  position: absolute;
  left: 25%;
  bottom: -0.4rem;
  width: 50%;
  height: 1px;
  background: #9b4dca;
  transition: all 0.3s;
}

header a:hover::after {
  left: 0%;
  width: 100%;
  background: #606c76;
}

.vertical-space {
  width: 100%;
  height: 1px;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

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

.alcohol-abuse-chart-box {
  display: flex;
  width: 100%;
  height: 100%;
  justify-content: center;
  flex-direction: column;
}

.alcohol-abuse-chart-box p {
  margin-top: 1rem;
}

.heading h1, .heading h2 {
  text-align: center;
}

svg {
  height: 800px;
}

#Alcohol, #connection-rectangle, #brain, #brain-projection, #human {
  opacity: 0;
}

.references li {
  transition: background-color 1s;
  padding: 0.5rem 1rem;
}

.highlight {
  background-color: rgb(251, 255, 130);
}

#brain-container canvas {
  margin: 1rem auto;
}