body {
  width: 95svw;
  min-height: 950px;
}

button {
  margin-top: 8%;
  margin-left: 8%;
}

/* 1.1 */
h1::before {
  content: "";
  display: block;
  width: 100px;
  height: 5px;
  background-color: aquamarine;
}

/* 1.2 */
li::after {
  content: "*";
}

/* 1.3 */
h2::before {
  content: " ! ";
  color: seagreen;
  font-size: 32px;
}

h2::after {
  content: "!";
  color: blueviolet;
  font-size: 44px;
}

/* 2.1 */
li:nth-child(odd) {
  background-color: aqua;
}

/* 2.2 */
button:hover {
  scale: 1.75;
  background-color: black;
  color: antiquewhite;
}

/* 2.3 */
li:first-child {
  color: yellow;
}

li:last-child {
  color: hotpink;
}

/* 2.4 */
div:not(:nth-child(2)) {
  font-family: "Courier New", Courier, monospace;
}