div.container {
  width: 1200px;
}

.grid-1 {
  width: 100px;
}

.grid-2 {
  width: 200px;
}

.grid-3 {
  width: 300px;
}

.grid-4 {
  width: 400px;
}

.grid-5 {
  width: 500px;
}

.grid-6 {
  width: 600px;
}

.grid-7 {
  width: 700px;
}

.grid-8 {
  width: 800px;
}

.grid-9 {
  width: 900px;
}

.grid-10 {
  width: 1000px;
}

.grid-11 {
  width: 1100px;
}

.grid-12 {
  width: 1200px;
}