span {
       font-size: 14px;
       color: #aaa;
       margin: 10px;
   }

   input {
       margin: 10px;
   }

   #box {
       width: 200px;
       height: 200px;
       background-color: #000;
       padding: 10px;
       box-sizing: border-box;
       font-size: 14px;
       color: #fff;
   }