html {
  scroll-behavior: smooth;
}

body {
  padding-top: 70px;
  background-color: rgb(246, 250, 254);
}

.starter-template {
  padding: 40px 15px;
  text-align: center;
}

hr {
  margin: 70px 0 70px 0;
}

.center-block {
  width: 640px;
  display: block;
  margin-right: auto;
  margin-left: auto;
}

ul li {
  padding: 3px 0;
}

.two_columns {
  columns: 2;
}

details {
  padding-bottom: 1.5em;
}

details>summary {
  padding: 4px;
  width: 70%;
  background-color: #eeeeee;
  border: none;
  box-shadow: 1px 1px 2px #bbbbbb;
  cursor: pointer;
}

details>p {
  background-color: #eeeeee;
  padding: 4px;
  margin: 0;
  box-shadow: 1px 1px 2px #bbbbbb;
}

footer {
  background-color: #000;
  color: #c3c3c3;
  text-align: center;
  padding: 1.5em 0;
  font-size: 14px;
}