div.patterns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 15px;
}

button.new-pattern {
  position: fixed;
  bottom: 15px;
  right: 15px;
}

div.button-bar{
  width: 100%;
  display: flex;
  justify-content: space-between;
}

@media (max-width: 720px) {
  div.patterns {
    grid-template-columns: 1fr;
  }
}