* {
  padding: 0px;
  margin: 0px;
  box-sizing: border-box;
}

body {
  background-color: black;
  color: darkred;
  font-family: "Courier New", Courier, monospace;
  font-size: 20px;
}

header {
  background-color: dimgrey;
  height: 125px;
  /* padding: 20px; */
  /* padding: 20px 30px; */
  padding: 12px 23px 40px 30px;
  margin-top: 35px;
  text-align: center;
}

nav {
  background-color: dimgrey;
}

ul li {
  display: inline-block;
}

main {
  background-color: black;
  display: flex;
}

section {
  background-color: gray;
}

aside {
  background-color: maroon;
  width: 25%;
}

section aside {
  min-height: 500px;
  padding: 10px;
}

#banner {
  background-color: black;
}

a:link {
  color: whitesmoke;
  background-color: transparent;
  text-decoration: none;
}

a:visited {
  color: whitesmoke;
  background-color: transparent;
  text-decoration: none;
}

a:hover {
  color: whitesmoke;
  background-color: transparent;
  text-decoration: underline;
}

footer {
  background-color: dimgrey;
}

@media screen and (max-width: 600px) {
  header {
    height: 150px;
    transition: all 0.3s ease-in;
  }
}