html, body{
  margin: 0;
  padding: 0;
  height: 100%;
}

/* Part 3 */

.wrapper {
  padding-bottom: 60px;
}

.wrapper footer {
  position: fixed;
  bottom: 0;
  padding: 20px 40px;
  font-size: 20px;
  color: white;
  background-color: #404040C0;
  margin-block-end: 0;
  width: 100%;
  text-align: center;
}


/* Part 4 */

li {
  list-style-type: square;
}

ul > ul > li:last-child {
  font-weight: 900;
}