#game-container {
    width: 400px;
    height: 500px;
    background-color: #8e44ad;
    display: flex;
    justify-content: center;
    align-items: center;
}

#board {
    width: 300px;
    height: 300px;
    background-color: #2c3e50;
    position: relative;
    border: 4px solid #34495e;
}

.tile {
    width: 100px;
    height: 100px;
    position: absolute;
    background-color: #ecf0f1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 32px;
    font-weight: bold;
    color: #2c3e50;
    border: 2px solid #bdc3c7;
    box-sizing: border-box;
    cursor: pointer;
    transition: top 0.2s, left 0.2s;
    user-select: none;
}

#hud-score {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0,0,0,0.5);
    padding: 5px 10px;
    border-radius: 5px;
}