.scrollspy-nav {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  position: sticky;
  top: 0;
  left: 0;
  background: #222;
  color: #fff;
}

.scrollspy-nav .scrollspy-link {
  text-decoration: none;
  color: #fafafa;
  font-family: sans-serif;
  transition: 0.3s ease;
  font-weight: bold;
  margin: 0px 10px;
  padding: 0px 5px;
  cursor: pointer;
}

.scrollspy-nav .scrollspy-link:hover {
  color: #fff;
}

.scrollspy-nav .scrollspy-indicator {
  position: absolute;
  height: 3px;
  width: 0;
  background: red;
  bottom: 0;
  left: 0;
  transition: width 0.3s, left 0.1s;
}

.scrollspy-section {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  font-weight: bold;
  font-size: xx-large;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}