Without width

sushi-styles-1.css

.nigiri {
  margin: 0 10px;  /* fixed 10px margin and padding... for now! */
  padding: 0 10px;
  float: left;
  
/*  Extra things to makit look nice  */
  background-color: #fff;
  border-radius: 100px;
  box-shadow: inset -3px -6px 0 0 #ece0cd;
}

.nigiri > h1 {
  background-color: #fca35d;
  color: #fce2da;
  border-radius: 100px;
  font-weight: 100;
}

.board {
  width: 500px;
  height: 200px; /* we need this because floated elements don't occupy real Document Flow space, try removing it! */
  margin: 20px auto;
  padding: 10px;
  background: #CBAD8C;
  border-radius: 8px;
  box-shadow: 12px 8px 0 rgba(#000, 0.1);
}