.b-example-divider {
  height: 3rem;
  background-color: rgba(0, 0, 0, .1);
  border: solid rgba(0, 0, 0, .15);
  border-width: 1px 0;
  box-shadow: inset 0 .5em 1.5em rgba(0, 0, 0, .1), inset 0 .125em .5em rgba(0, 0, 0, .15);
}

.form-control-dark {
  color: #fff;
  background-color: var(--bs-dark);
  border-color: var(--bs-gray);
}

.form-control-dark:focus {
  color: #fff;
  background-color: var(--bs-dark);
  border-color: #fff;
  box-shadow: 0 0 0 .25rem rgba(255, 255, 255, .25);
}

.bi {
  vertical-align: -.125em;
  fill: currentColor;
}

.text-small {
  font-size: 85%;
}

.dropdown-toggle {
  outline: 0;
}

main>.container {
  padding: 60px 15px 0;
}

.bd-placeholder-img {
  font-size: 1.125rem;
  text-anchor: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

@media (min-width: 768px) {
  .bd-placeholder-img-lg {
    font-size: 3.5rem;
  }
}

.scroll-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  text-align: center;
  line-height: 40px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.scroll-to-top.show {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top i {
  font-size: 24px;
}

.head {
  margin-top: 20px;
  text-align: center;
}

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