* {
  font-family: "Poppins", sans-serif;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  display: grid;
  grid-template:
    "aside main" 1fr
    / 300px 1fr;
  max-width: 800px;
  height: 100vh;
  margin: 0 auto;
}
main {
  padding: 1rem;
  margin: 1rem;
  background: rgb(250, 250, 255);
}
main section {
  padding-bottom: 2rem;
  border-bottom: 1px dotted #666;
}
main h2 {
  padding: 1rem;
}
main h3 {
  padding-left: 2rem;
  color: blue;
}
main p {
  margin-bottom: 2rem;
}
aside {
  margin: 1rem;
  padding: 1rem;
  border: 1px solid #333;
}
aside h2{
  text-align: center;
  margin-bottom: 15px;
}
aside ul {
  counter-reset: index;
  padding-left: 10px;
}
aside ul li {
  list-style: none;
  margin-bottom: 6px;
  font-weight: bold;
}
aside ul li::before {
  counter-increment: index;
  content: counters(index, "-");
  margin-right: 7px;
}
aside ul li a{
  transition: .3s ease;
}
aside ul li a:hover{
  color: red;
}
aside ul li ul {
  color: blue;
  margin-bottom: 1rem;
}
aside ul a {
  text-decoration: none;
}

@media (max-width: 580px) {
  body {
    grid-template:
      "aside"
      "main";
  }
}