@charset "UTF-8";
body{
    font-family: 'Arial';
    font-size: 16px;
}
.minesweeper{
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translateY(-50%) translateX(-50%);
    width: 100%;
    text-align: center;
}
p{
    margin: 30px;
}
table{
    margin: 0 auto;
    user-select: none;
}

input{
    margin-left: 5px;
    margin-right: 10px;
    padding: 5px;
    border: 1px solid #aaa;
    border-radius: 10px;
    text-align: left;
}
input[type=button]{
    background-color: #006aff;
    color: #fff;
    border: 0px;
    padding-left: 10px;
    padding-right: 10px;
}
td{
    width:36px;
    height:36px;
    text-align:center;
    cursor:default
}
tr:nth-of-type(odd) {
    td:nth-of-type(odd) {
      background-color: #ddd;
    }
    td:nth-of-type(even) {
      background-color: #eee;
    }
  }

tr:nth-of-type(even) {
    td:nth-of-type(odd) {
      background-color: #eee;
    }
    td:nth-of-type(even) {
      background-color: #ddd;
    }
  }