.content.detail {
    padding-top: 47px;
}

.book-list {
    display: flex;
    flex-wrap: wrap;
    padding: 30px 0;
    margin: 0 auto;
    width: 910px;
}
.book-list li {
    width: 418px;
    height: 465px;
    background-color: #fff;
    box-shadow: 0px 2px 11.28px 0.72px rgba(0, 0, 0, 0.23);
    margin: 16px 18px;
}
.book-list li a {
    display: block;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.book-list li a img {
    width: 297px;
    height: 387px;
}

.book-info {
    width: 877px;
    height: 598px;
    background-color: #fff;
    box-shadow: 0px 2px 11.28px 0.72px rgba(0, 0, 0, 0.23);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    position: relative;
}
.book-info .book-logo {
    position: absolute;
    top: 30px;
    right: 30px;
    height: 58px;
}
.book-info .book-logo.langsoc {
    height: 34px;
}
.book-info .book-img {
    width: 297px;
    height: 387px;
}
.book-info .book-name {
    font-size: 42px;
    color: #272727;
    line-height: 1;
    margin-top: 45px;
}
.book-data {
    margin-top: 47px;
}
.book-data .tabs {
    display: flex;
}
.book-data .tab {
    width: 50%;
    height: 133px;
    border-radius: 20px 20px 0 0;
    background-color: #d9d6e4;
    font-size: 38px;
    color: #272727;
}
.book-data .tab.on {
    background-color: #674dbe;
    color: #ffffff;
}
.book-data .tab.inactive {
    opacity: 0.5;
}
.data-list.mp3 {
    display: none;
}
.data-list .d-depth-1 {
    border-bottom: 1px solid #d4d4d4;
}
.data-list .d-depth-1 h3 {
    height: 140px;
    display: flex;
    align-items: center;
    position: relative;
    font-size: 38px;
    color: #674dbe;
    background-color: #fff;
    padding-left: 60px;
}
.data-list .d-depth-1 h3 .unit {
    position: relative;
    padding-left: 60px;
}
.data-list .d-depth-1 h3 .unit::before {
    content: '';
    width: 22px;
    height: 29px;
    background: url(../img/bullet.png);
    background-size: 100% 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    margin: auto 0;
}
.data-list .drop-arr {
    width: 37px;
    height: 22px;
    background: url(../img/drop_down_d.png);
    background-size: 100% 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    right: 60px;
    margin: auto 0;
    transition: all 0.4s ease;
}
.data-list .active .drop-arr {
    transform: rotate(180deg);
}
.data-list .d-depth-2 {
    background-color: #efedf6;
    box-shadow: 0px 3px 3px 0px inset rgba(0, 0, 0, 0.2);
    display: none;
}
.data-list .d-depth-2 li {
    height: 140px;
    display: flex;
    align-items: center;
    padding-left: 60px;
    position: relative;
}
.data-list .d-depth-2 li + li {
    border-top: 1px solid #c7c5cd;
}
.data-list .d-depth-2 li .d-title {
    font-size: 34px;
    color: #272727;
    font-family: NanumSquareR;
}
.data-list .d-depth-2 li .d-title .lesson {
    display: inline-block;
    color: #674dbe;
    width: 200px;
}
.data-list .play-btn {
    width: 71px;
    height: 71px;
    background: url(../img/btn_play.png);
    background-size: 100% 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    right: 43px;
    margin: auto 0;
}

.video-container {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 auto;
    max-width: 960px;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    align-items: center;
    justify-content: center;
    z-index: 30;
    display: none;
}
.video-container.active {
    display: flex;
}
.video-wrap {
    padding: 0 20px;
    width: 100%;
}
.video-wrap .close {
    display: flex;
    justify-content: end;
    margin-bottom: 20px;
}
.video-box {
    position: relative;
    height: 682px;
    border-radius: 20px;
    border: 4px solid #ffffff;
    overflow: hidden;
}
.video-box video {
    object-fit: fill;
    width: 100%;
    height: 100%;
}
.video-js {
    width: 100%;
    height: 100%;
}

.controls {
    height: 110px;
    background-color: #674dbe;
    border-radius: 20px;
    box-shadow: 0px 4px 0px 0px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
}
.controls>div {
    display: flex;
    align-items: center;
}
.controls .play-pause-btn {
    width: 72px;
    height: 75px;
    background-image: url(../img/control_play.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: 68px auto;
}
.controls .play-pause-btn.playing {
    background-image: url(../img/control_pause.png);
    background-size: 72px auto;
}
.controls .time {
    width: 168px;
    height: 62px;
    background-color: #5a40b2;
    border-radius: 31px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #ffffff;
    margin-left: 10px;
}
.controls .time-seperator {
    margin: 0 5px;
}
.controls .volume-btn {
    width: 79px;
    height: 73px;
    background-image: url(../img/control_volume.png);
    background-size: auto 73px;
    background-position: center;
}
.controls .volume-btn.muted {
    background-image: url(../img/control_volume_off.png);
}
.close-player {
    width: 69px;
    height: 69px;
    background: url(../img/control_close.png);
    background-size: 100% 100%;
}

.audio-box {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 auto;
    max-width: 960px;
    width: 100%;
    padding: 10px 20px;
    display: none;
}
.audio-box.active {
    display: block;
}
.audio-box .close {
    height: 30px;
    position: relative;
}
.audio-box .close-player {
    background: url(../img/control_close_bk.png);
    background-size: 100% 100%;
    position: absolute;
    bottom: 100%;
    right: 0;
}
.progress-bar {
    width: 425px;
    height: 18px;
    background-color: #4c339e;
    border-radius: 10px;
    margin-left: 12px;
    position: relative;
    overflow: hidden;
}
.progress-bar .play-prog {
    width: 0;
    background-color: #fff;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    border-radius: 10px;
    display: none;
}
.progress-bar .play-prog.playing {
    display: block;
}
.audio-box .vjs-fullscreen-control,
.audio-box .vjs-picture-in-picture-control {
    display: none;
}


@media all and (max-width: 960px) {
    .book-list {
        padding: 3.125vw 0;
        width: 94.791vw;
    }
    .book-list li {
        width: 43.541vw;
        height: 48.4375vw;
        box-shadow: 0px 0.208vw 1.175vw 0.075vw rgba(0, 0, 0, 0.23);
        margin: 1.666vw 1.875vw;
    }
    .book-list li a img {
        width: 30.9375vw;
        height: 40.3125vw;
    }    

    .content.detail {
        padding-top: 4.895vw;
    }
    .book-info {
        width: 92.315vw;
        height: 62.291vw;
        box-shadow: 0px 0.208vw 1.175vw 0.075vw rgba(0, 0, 0, 0.23);
    }
    .book-info .book-logo {
        top: 3.125vw;
        right: 3.125vw;
        height: 6.0416vw;
    }    
    .book-info .book-logo.langsoc {
        height: 3.5416vw;
    }    
    .book-info .book-img {
        width: 30.9375vw;
        height: 40.3125vw;
    }
    .book-info .book-name {
        font-size: 4.375vw;
        margin-top: 4.6875vw;
    }
    .book-data {
        margin-top: 4.895vw;
    }
    .book-data .tab {
        height: 13.854vw;
        border-radius: 2.083vw 2.083vw 0 0;
        font-size: 3.958vw;
    }
    .data-list .d-depth-1 {
        border-bottom: 0.104vw solid #d4d4d4;
    }
    .data-list .d-depth-1 h3 {
        height: 14.583vw;
        font-size: 3.958vw;
        padding-left: 6.25vw;
    }
    .data-list .d-depth-1 h3 .unit {
        padding-left: 6.25vw;
    }
    .data-list .d-depth-1 h3 .unit::before {
        width: 2.291vw;
        height: 3.0208vw;
    }
    .data-list .drop-arr {
        width: 3.854vw;
        height: 2.291vw;
        right: 6.25vw;
    }
    .data-list .d-depth-2 {
        box-shadow: 0px 0.3125vw 0.3125vw 0px inset rgba(0, 0, 0, 0.2);
    }
    .data-list .d-depth-2 li {
        height: 14.583vw;
        padding-left: 6.25vw;
    }
    .data-list .d-depth-2 li + li {
        border-top: 0.104vw solid #c7c5cd;
    }    
    .data-list .d-depth-2 li .d-title {
        font-size: 3.541vw;
    }
    .data-list .d-depth-2 li .d-title .lesson {
        width: 20.833vw;
    }    
    .data-list .play-btn {
        width: 7.395vw;
        height: 7.395vw;
        right: 4.479vw;
    }    

    .video-wrap {
        padding: 0 2.173vw;
    }
    .video-wrap .close {
        margin-bottom: 2.083vw;
    }    
    .video-box {
        height: 71.041vw;
        border-radius: 2.083vw;
        border: 0.416vw solid #ffffff;
    }
    .controls {
        height: 11.458vw;
        border-radius: 2.083vw;
        box-shadow: 0px 0.416vw 0px 0px rgba(0, 0, 0, 0.08);
        padding: 0 3.125vw;
    }
    .controls .play-pause-btn {
        width: 7.5vw;
        height: 7.8125vw;
        background-size: 7.083vw auto;
    }
    .controls .play-pause-btn.playing {
        background-size: 7.5vw auto;
    }
    .controls .time {
        width: 17.5vw;
        height: 6.458vw;
        border-radius: 3.229vw;
        font-size: 2.5vw;
        margin-left: 1.041vw;
    }
    .controls .time-seperator {
        margin: 0 0.5208vw;
    }
    .controls .volume-btn {
        width: 8.229vw;
        height: 7.604vw;
        background-size: auto 7.604vw;
    }
    .close-player {
        width: 7.1875vw;
        height: 7.1875vw;
    }    

    .audio-box {
        padding: 1.041vw 2.083vw;
    }
    .progress-bar {
        width: 44.2708vw;
        height: 1.875vw;
        border-radius: 1.041vw;
        margin-left: 1.25vw;
    }
    .progress-bar .play-prog {
        border-radius: 1.041vw;
    }
}