html,
body {
    /* overflow:hidden; */
    height: 100%;
}

#mainContent {
    background-color: rgb(250, 250, 250);
}

.flipbook {
    padding: 2rem 0;
}

@media(min-width:400px) {
    .flipbook {
        padding: 1rem 0;
    }
}

.flipbook .loadingContent {
    display: none;
    overflow: hidden;
}

.flipbook #loadingPage img {
    width: 60px;
    height: 60px;
    opacity: 0.2;
    margin: 8em 0 10em 0;
    animation: loading 1.5s -0.5s infinite linear;
}

@keyframes loading {
    100% {
        transform: rotate(360deg);
    }
}

.flipbook .arrow-group {
    display: none;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    position: absolute;
    top: 55%;
    left: 0;
}

.flipbook .arrow-group .page-group {
    display: none;
}

@media(max-width:1199px) {
    .flipbook .arrow-group {
        top: 60%;
    }
}

@media(max-width:991px) {
    .flipbook .arrow-group {
        top: 70%;
    }
}

@media(max-width:767px) {
    .flipbook .arrow-group {
        top: 60%;
    }
}

.flipbook .arrow-group a {
    width: 60px;
    margin: 1rem;
}

.flipbook .arrow-group a img {
    opacity: 0.3;
}

.flipbook .arrow-group a:hover img {
    opacity: 0.6;
}

@media(max-width:680px) {
    .flipbook .arrow-group {
        justify-content: center;
        width: 100%;
        position: static;
    }
    .flipbook .arrow-group a {
        width: 40px;
        margin: 1.5rem;
    }
    .flipbook .arrow-group .page-group {
        display: block;
    }
}

.flipbook .control-group {
    display: flex;
    justify-content: center;
    align-items: start;
    text-align: center;
    flex-wrap: wrap;
}

.flipbook .control-group .goto-block {
    margin: 1em 16px;
    display: inline-block;
}

@media(max-width:400px) {
    .flipbook .control-group .goto-block {
        margin: 6px 16px;
    }
}

.flipbook .control-group .btn.btn_md {
    /* outline: 1px red solid; */
    opacity: 0.4;
    font-size: 1em;
    line-height: 1.2em;
    background-color: transparent;
    color: #fff;
    border: none;
    padding: 0;
    margin: 1em 12px;
    vertical-align: baseline;
    position: relative;
    transition: all 0.2s;
}

.flipbook .control-group .btn.btn_md:hover,
.flipbook .control-group .btn.btn_md:active,
.flipbook .control-group .btn.btn_md:focus {
    opacity: 0.8;
    background-color: transparent;
    box-shadow: none;
}

@media(min-width:681px) {
    .flipbook .btn.btn_md:hover:after {
        display: block;
        color: #aaa;
        font-size: 0.8rem;
        font-weight: 300;
        position: absolute;
        left: 50%;
        top: -18px;
        transform: translateX(-50%);
    }
    .flipbook #flipbook_first:hover:after {
        content: '第一頁';
    }
    .flipbook #flipbook_previous:hover:after {
        content: '上一頁';
    }
    .flipbook #flipbook_next:hover:after {
        content: '下一頁';
    }
    .flipbook #flipbook_last:hover:after {
        content: '最後一頁';
    }
    .flipbook #flipbook_zoomin:hover:after {
        content: '放大';
    }
    .flipbook #flipbook_zoomout:hover:after {
        content: '縮小';
    }
    .flipbook .downloadPDF:hover:after {
        content: '下載';
    }
}

.flipbook .control-group .btn.goto {
    font-size: 1em;
    background-color: #000;
    line-height: 1.2em;
    font-weight: 500;
    border-radius: 0 2em 2em 0;
    color: #fff;
    border: none;
    padding: 6px 12px;
    margin: 0;
    margin-bottom: 1em;
    margin-left: -4px;
    vertical-align: baseline;
    transition: all 0.2s;
}

.flipbook .control-group .btn.goto:hover {
    background-color: #000;
}

/* .flipbook .control-group .btn.btn_md:focus {
    outline: none;
} */

.flipbook .control-group img {
    width: 36px;
    height: 36px;
}

.flipbook .control-group input {
    font-size: 1em;
    border: 1px solid #aaa;
    line-height: 1.2em;
    font-weight: 500;
    border-radius: 2em 0 0 2em;
    margin-bottom: 1em;
    width: 120px;
    padding: 5px 12px;
}

.flipbook .control-group input:focus {
    outline: none;
}

.flipbook .mob-show {
    display: none;
}

@media(max-width: 680px) {
    .goto-block {
        order: -1;
    }
    .flipbook .mob-show {
        display: initial;
        width: 100%;
    }
    .flipbook .control-group .btn.btn_md {
        margin: 8px 12px;
    }
    .flipbook .control-group input {
        margin-bottom: 8px;
    }
    .flipbook .control-group .btn.goto {
        margin: 0;
        margin-bottom: 8px;
        margin-left: -4px;
    }
    .flipbook .control-group {
        margin-bottom: 1em;
    }
}

@media(max-width: 400px) {
    .flipbook .control-group .btn.btn_md {
        margin: 6px 12px;
    }
    .flipbook .control-group .btn.goto {
        margin: 6px 0;
        margin-left: -4px;
    }
}

.book-wrap {
    overflow: scroll;
    /* padding: 1rem 0; */
}

#flipbook {
    width: 960px;
    height: 500px;
    overflow: hidden;
    background-color: transparent;
    transition: margin 0.5s;
}

@media(max-width:767px) {
    #flipbook {
        /* box-shadow: 0px 5px 10px rgb(0, 0, 0, 0.5); */
    }
}

#flipbook .page {
    width: 100%;
    height: auto;
    background-color: white;
    font-size: 20px;
    text-align: center;
}

#flipbook .hard {
    background: #ccc !important;
    color: #333;
    font-weight: bold;
}

#flipbook .odd {
    background: -webkit-gradient(linear, right top, left top, color-stop(0.95, #FFF), color-stop(1, #DADADA));
    /* box-shadow: inset -2px 0 5px #ccc; */
}

#flipbook .even {
    background: -webkit-gradient(linear, left top, right top, color-stop(0.95, #fff), color-stop(1, #dadada));
    /* box-shadow: inset 2px 0 5px #ccc; */
}

canvas {
    max-width: 100%;
    max-height: 100%;
    height: auto;
    mix-blend-mode: multiply;
}