.box_game_xep_hinh {
    width: 400px;
    margin: 0 auto;
    padding: 0px;
    background: transparent;
    box-shadow: none;
    border-radius: 10px;
}

#controls {
    width: 400px;
    height: 40px;
    margin: 10px 0;
}

#container-xep-hinh {
    width: 400px;
    height: 400px;
    background-color: #214c90;
    position: relative;
}

#message {
    width: 100%;
    padding: 0;
    color: #213C75;
    font-size: 16px;
    line-height: 24px;
    text-align: center;
}

#hint {
    border: 1px solid #C2C1C1;
    width: 400px;
    height: 400px;
    background-image: url(../images/game/gamexephinh/hinh_xep.png);
    position: absolute;
    z-index: 3;
}

.btn {
    width: 180px;
    height: 44px;
    font-size: 16px;
    text-transform: uppercase;
    line-height: 44px;
    color: #FFFFFF;
    text-align: center;
    vertical-align: middle;
}

#start-btn {
    float: left;
    cursor: pointer;
    background: linear-gradient(126.62deg, #3E63AF -21.77%, #213C75 90.87%);
    border-radius: 50px;
    color: #FFFFFF;
}

#start-btn::before {
    content: url(../images/game/gamexephinh/play.svg);
    position: relative;
    top: 6px;
    padding-right: 8px;
}

#hint-btn {
    float: right;
    background-color: #F9A61A;
    border-radius: 50px;
    color: #FFFFFF;
}

#hint-btn::before {
    content: url(../images/game/gamexephinh/hint.svg);
    position: relative;
    top: 6px;
    padding-right: 8px;
}

#hint-btn:hover {
    background-color: #f3bd2a;
}

.piece {
    border: 1px solid #C2C1C1;
    box-sizing: border-box;
    background-image: url(../images/game/gamexephinh/hinh_xep.png);
    position: absolute;
}

.empty-piece {
    background-color: #214c90;
    position: absolute;
}

.lucky-box img {
    position: absolute;
    left: 0;
    right: 0;
    margin: 0 auto;
    top: -25px;
    width: 50px;
}