body {
  grid-template-columns: 1fr min(90%, 1440px) 1fr;
}
footer {
  grid-column: 1 / -1;
}
.post-list {
  list-style-type: none;
  margin: 0px;
  padding: 0px;
  display: flex;
  flex-flow: row wrap;
  justify-content: space-around;
  align-items: center;
  gap: 15px;
}
.post-list li {
  max-width: 350px;
  width: 100%;
}
.post-list h3 {
  text-align: center;
}