* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

body {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #f4f4f4;
}

body > h1 {
  font-size: 70px;
  font-family: Arial, Helvetica, sans-serif;
  margin-bottom: 0;
  margin-bottom: 50px;
}

#container {
  display: flex;
  flex-direction: row;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

#grid1,
#grid2 {
  display: grid;
  grid-template-columns: repeat(35, 15px);
  grid-template-rows: repeat(35, 15px);
  justify-content: start;
}

#grid1 div,
#grid2 div {
  background-color: aqua;
  border: 0.1px solid darkblue;
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (max-width: 768px) {
  #container {
    flex-direction: column;
  }
}