/* wrapper classes */
/*******************************/

.wrapper {
    text-align: center;
}

.container_wrapper {
    width: 516px;
    margin: 0 auto;
    clear: both;
}

.button-wrapper {
    margin: 25px 0;
}

.level_selection {
    margin: 25px 0;
}


/* playing board */
/*******************************/

.container {
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    width: 208px;
}

.container.player {
    margin-right: 100px;
    float: left;
}

.tile, .lvl_tile {
    width: 50px;
    height: 50px;
    background: #005500;
    border: 1px solid #000;
    display: inline-block;
}

.tile, .level_selection {
    cursor: pointer;
}
.tile.marked, .lvl_tile.marked {
    background: #001aaa;
}

.tile.marked:hover {
    background: #002aff;
}

.tile:hover {
    background: #007700;
}


h1 {
    margin-bottom: 50px;
}

.button {
    display: inline-block;
    cursor: pointer;
    margin: 25px auto;
    width: 100px;
    line-height: 50px;
    border: 1px solid #000;
    background-color: yellow;
}

.select_lvl {
    display: inline-block;
    color: #FFF;
    width: 30px;
    line-height: 30px;
    background: #111111;
}

.select_lvl.is--active {
    position: relative;
    bottom: 5px;
}