style.css

body {
    background: #000;
    width: 100%;
    color:#fff;
    font-family: 'VT323', monospace;
    background-image: url("http://www.transparenttextures.com/patterns/3px-tile.png");
  }
  
  #mode1:hover,#mode2:hover, #icon-o:hover, #icon-x:hover{ cursor: pointer; }
  
  
  .board-wrap {
    width: 300px;
    margin: 50px auto;
    background: #fff;
    height: 334px;
  }
  
  .game-init {
    width: 300px;
    height: 300px;
    background-color: #000;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .game-board {
    color:#000;
  }
  .game-result {
    float: left;
    color: #000;
    text-align: left;
    line-height: 28px;
    padding-left: 8px;
    font-size: 34px;
  }
  
  .mode-select {
    padding-top: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  ul {
    list-style: none;
  }
  
  .row {
    margin: 0!important;
    height: 100px;
  }
  
  .cell {
    border-right: 1px solid #000;
    border-bottom: 1px solid #000;
    width: 100px;
    height: 100px;
    float: left;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .game-status {
    background: yellow;
    overflow: hidden;
  }
  
  .restart {
    float: right;
    border-radius: 0px;
  }
  
  .game-board {
    font-size: 60px;
  }
  
  .board {
    font-size: 24px;
  }