* {
    margin: 0;
    padding: 0;
    list-style: none;
}


body {
    width: 100%;
    height: 100vh;
    background-image: url("../img/back.png");
    background-size: contain;
    position: relative;
    overflow: hidden;
    user-select: none;
}

.result {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 30px;
    z-index: 999;
}

.ground {
    position: absolute;
    width: 100%;
    height: 112px;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
}

.ground img {
    position: absolute;
    width: 100%;
    height: 100%;
}

.bird {
    width: 34px;
    height: 24px;
    position: absolute;
    left: 100px;
    transition: all linear 0.15s;
    z-index: 999;
}

.up {
    transform: rotate(-38deg);
}

.down {
    transform: rotate(90deg);
}

.sg {
    width: 55px;
    position: absolute;
}

@keyframes birdShake {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(10px);
    }
    100% {
        transform: translateY(0px);
    }
}

@keyframes birdMotion {
    0% {
        background: url("../img/hn1.png");
    }
    50% {
        background: url("../img/hn2.png");
    }
    100% {
        background: url("../img/hn3.png");
    }
}

@keyframes birdBlueMotion {
    0% {
        background: url("../img/hn_blue_1.png");
    }
    50% {
        background: url("../img/hn_blue_2.png");
    }
    100% {
        background: url("../img/hn_blue_3.png");
    }
}

@keyframes birdRedMotion {
    0% {
        background: url("../img/hn_red_1.png");
    }
    50% {
        background: url("../img/hn_red_2.png");
    }
    100% {
        background: url("../img/hn_red_3.png");
    }
}



.start {
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, -40%);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 999;
}

.start .play {
    width: 60px;
    margin-top: 20px;
    cursor: pointer;
}

.start .bird_list {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.start .bird_list img {
    cursor: pointer;
}

.start .bird_list img:nth-child(2){
    margin: 0 30px;
}

.start .menu {
    margin: 20px 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #00000038;
    color: #fff;
    border-radius: 6px;
}

.start .menu .item {
    width: 100%;
    height: 100%;
    text-align: center;
    height: 40px;
    line-height: 40px;
    cursor: pointer;
}

.start .menu .item:first-child {
    border-bottom: 0.5px solid #b9b9b9;
}

.pause {
    position: absolute;
    left: 20px;
    top: 20px;
    cursor: pointer;
    z-index: 999;
}




.show {
    display: block !important;
}

.hidden {
    display: none !important;
}

audio {
    display: none;
}