* {
  outline: black solid 1px;
}

nav img {
  width: 100px;
}

header {
  display: flex;
  justify-content: center;
}
nav {
  width: 60%;
  display: flex;
}
ul {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-content: center;
  width: 100%;
}
li {
  display: flex;
}

.banner {
  display: flex;
}

.getadblocksection {
  text-align: center;
}

.systemlist {
  width: 300px;
  margin: auto;
  padding: 0;
  display: flex;
  justify-content: space-between;
  text-align: center;
}

.systemlist img {
  width: 30px;
}

.cards {
  display: flex;
  justify-content: center;
}

.card {
  text-align: center;
  width: 20%;
  margin: 10px;
}

.card p,
.card a {
  text-align: left;
  display: block;
}

#uhoh {
  color: red;
  background-color: black;
  text-align: center;
}