html {
  box-sizing: border-box;
  font-size: 15px;
}
  h2 {
    color: chartreuse;
    text-align: center;
    border-style:groove;
    border-color: lawngreen;
  }
  *, *:before, *:after {
    box-sizing: inherit;
  }
  
  body {
    padding: 0;
    margin: 0;
    font-family: 'Mochiy Pop One', sans-serif;
  }
  
  h1 {
    text-align: center;
    font-size: 8rem;
    line-height: 1;
    margin-bottom: 0;
    color:rgb(105, 160, 50);
  }
  
  .score {
    background: rgba(14, 26, 15, 0.651);
    padding: 0 3rem;
    line-height: 1;
    border-radius: 1rem;
  }
  
  .game {
    width: 650px;
    height: 650px;
    display: flex;
    flex-wrap: wrap;
    margin: 0 auto;
  }
  
  .hole {
    flex: 1 0 33.33%;
    overflow: hidden;
    position: relative;
  }
  
  .hole:after {
    display: block;
    background: url(img/dirt.svg) bottom center no-repeat;
    background-size: contain;
    content: '';
    width: 100%;
    height:70px;
    position: absolute;
    z-index: 2;
    bottom: -30px;
  }
  
  .mole {
    background: url('img/mole.svg') bottom center no-repeat;
    background-size: 60%;
    position: absolute;
    top: 100%;
    width: 100%;
    height: 100%;
    transition:all 0.4s;
  }
  
  .hole.up .mole {
    top: 0;
  }

  button {
      color: brown;
      background-color: burlywood;
      font-family: cursive;
      border-radius: 40%;
      display: inline-block;
      text-align: center;
      margin: auto;
  }
  .topnav {
    background-color: rgba(24, 163, 31, 0.349);
    overflow: hidden;
  }
  
  
  .topnav a {
    float: left;
    display: block;
    color: #311111;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  }
  
  
  .topnav a:hover {
    background-color: rgba(10, 124, 44, 0.377);
    color: rgb(195, 228, 206);
  }
  
  
  .topnav a.active {
    background-color: #1761085b;
    color: rgb(187, 179, 143);
  }
  
  
  .topnav .icon {
    display: none;
  }
  .text-center {
    text-align: center;
  }