body {
    background: black;
}

#games {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)) ; 
  /*grid-template-rows: auto 1fr auto;    Header, main, footer heights */
  gap: auto;                            /* Space between items */
}

div#header {
  background: white;
  height: 50px;
  width: max(30%, 500px);
  background: white;
  border-bottom-left-radius: 18px;
  border-bottom-right-radius: 18px;
  margin: auto;
}

#header span {
  font-family: 'Ubuntu', Arial;
  font-size: 28px;
  text-align: center;
  display: block;
}