* {
  box-sizing: border-box;
}
html, body {
  margin: 0;
  padding: 0;
}
main {
  max-width: 1200px;
  margin: 0px auto;
  padding: 0px 0px;
  width: 100%; 
  display: grid;
  grid-auto-rows: 40px; 
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr)); /* old: 480px */
  grid-grid: 1px;
  vertical-align: middle;
  background-color: #1c1c1c; /* Gap color */
  overflow-x: hidden; /*Fix from chatgpt*/
}

article {
  border: 0px solid #000;
  padding: 10px;
  color: #fff;
  vertical-align: middle;
    background-color: #26282A; /* Your normal color */
  margin: 1px; /* Fake the gap by margin, not grid-gap */
}

article:nth-child(odd) {
  background-color: #26282A;
}

article:nth-child(even) {
  background-color: #353839;
}