body{
      display: flex;
      flex-direction: column;
      align-items: center;
   }
   .canvas{
      background-color: rgb(72, 172, 42);
      border: 3px solid #000;
   }
    
   .btn{
      border: 1px solid #000;
      width: 10vw;
      height: 5vh;
      font-size: 15px;
      font-weight: 700;
      background-color: rgb(72, 172, 42);
      color: white;
      border-radius: 10px;
      box-shadow: 3px 3px 6px #000;
   }
   .btn:hover{
      background-color: rgb(53, 171, 17);
      font-size: 14px;
      cursor: pointer;
   }