* {
    box-sizing: border-box;
  }
  body {
    font-family: 'Indie Flower', cursive;
  }
  .game-header {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
  }
  .current {
    font-size: 2em;
  }
  .board {
    width: 306px;
    margin: 0 auto;
    display: grid;
    grid-template: repeat(3,100px) / repeat(3,100px);
    grid-gap: 3px;
    background-color: #000;
    position: relative;
    overflow: hidden;
  }
  .field {
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 50px;
    cursor: pointer;
  }

  .modal{
    height: 306px;
    width: 306px;
    position: absolute;
    left: 0;
    top: -306px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.562);
    transition: 0.3s;
    display: flex;
    flex-direction: column;
  }
  h2{
    color: white;
    margin-top: 10px;
  }
  .btn{
    margin-top: 10px;
    background: #000;
    color: #fff;
    cursor: pointer;
    padding: 10px 15px;
  }