.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5); /* black with 0.5 opacity */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}


.book {
    --color: #fff;
    --duration: 6.8s;
    width: 32px;
    height: 79px;
    left: 0;
    margin: 0 auto;
    zoom: 1.5;
    position: absolute;
    right: 0;
    top: 45%;
    bottom: 0;
}

    .book .inner {
        width: 32px;
        height: 12px;
        position: relative;
        transform-origin: 2px 2px;
        transform: rotateZ(-90deg);
        -webkit-animation: book var(--duration) ease infinite;
        animation: book var(--duration) ease infinite;
    }

        .book .inner .left,
        .book .inner .right {
            width: 60px;
            height: 4px;
            top: 0;
            border-radius: 2px;
            background: var(--color);
            position: absolute;
        }

            .book .inner .left:before,
            .book .inner .right:before {
                content: "";
                width: 48px;
                height: 4px;
                border-radius: 2px;
                background: inherit;
                position: absolute;
                top: -10px;
                left: 6px;
            }

        .book .inner .left {
            right: 28px;
            transform-origin: 58px 2px;
            transform: rotateZ(90deg);
            -webkit-animation: left var(--duration) ease infinite;
            animation: left var(--duration) ease infinite;
        }

        .book .inner .right {
            left: 36px;
            transform-origin: 2px 2px;
            transform: rotateZ(-90deg);
            -webkit-animation: right var(--duration) ease infinite;
            animation: right var(--duration) ease infinite;
        }

        .book .inner .middle {
            width: 32px;
            height: 12px;
            border: 4px solid var(--color);
            border-top: 0;
            border-radius: 0 0 9px 9px;
            transform: translateY(2px);
        }

    .book ul {
        margin: 0;
        padding: 0;
        list-style: none;
        position: absolute;
        left: 50%;
        top: 0;
    }

        .book ul li {
            height: 4px;
            border-radius: 2px;
            transform-origin: 100% 2px;
            width: 48px;
            right: 0;
            top: -10px;
            position: absolute;
            background: var(--color);
            transform: rotateZ(0deg) translateX(-18px);
            -webkit-animation-duration: var(--duration);
            animation-duration: var(--duration);
            -webkit-animation-timing-function: ease;
            animation-timing-function: ease;
            -webkit-animation-iteration-count: infinite;
            animation-iteration-count: infinite;
        }

            .book ul li:nth-child(0) {
                -webkit-animation-name: page-0;
                animation-name: page-0;
            }

            .book ul li:nth-child(1) {
                -webkit-animation-name: page-1;
                animation-name: page-1;
            }

            .book ul li:nth-child(2) {
                -webkit-animation-name: page-2;
                animation-name: page-2;
            }

            .book ul li:nth-child(3) {
                -webkit-animation-name: page-3;
                animation-name: page-3;
            }

            .book ul li:nth-child(4) {
                -webkit-animation-name: page-4;
                animation-name: page-4;
            }

            .book ul li:nth-child(5) {
                -webkit-animation-name: page-5;
                animation-name: page-5;
            }

            .book ul li:nth-child(6) {
                -webkit-animation-name: page-6;
                animation-name: page-6;
            }

            .book ul li:nth-child(7) {
                -webkit-animation-name: page-7;
                animation-name: page-7;
            }

            .book ul li:nth-child(8) {
                -webkit-animation-name: page-8;
                animation-name: page-8;
            }

            .book ul li:nth-child(9) {
                -webkit-animation-name: page-9;
                animation-name: page-9;
            }


@-webkit-keyframes page-0 {
    4% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    13%, 54% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    63% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-0 {
    4% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    13%, 54% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    63% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-1 {
    5.86% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    14.74%, 55.86% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    64.74% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-1 {
    5.86% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    14.74%, 55.86% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    64.74% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-2 {
    7.72% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    16.48%, 57.72% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    66.48% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-2 {
    7.72% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    16.48%, 57.72% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    66.48% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-3 {
    9.58% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    18.22%, 59.58% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    68.22% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-3 {
    9.58% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    18.22%, 59.58% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    68.22% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-4 {
    11.44% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    19.96%, 61.44% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    69.96% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-4 {
    11.44% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    19.96%, 61.44% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    69.96% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-5 {
    13.3% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    21.7%, 63.3% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    71.7% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-5 {
    13.3% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    21.7%, 63.3% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    71.7% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-6 {
    15.16% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    23.44%, 65.16% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    73.44% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-6 {
    15.16% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    23.44%, 65.16% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    73.44% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-7 {
    17.02% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    25.18%, 67.02% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    75.18% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-7 {
    17.02% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    25.18%, 67.02% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    75.18% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-8 {
    18.88% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    26.92%, 68.88% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    76.92% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-8 {
    18.88% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    26.92%, 68.88% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    76.92% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes page-9 {
    20.74% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    28.66%, 70.74% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    78.66% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@keyframes page-9 {
    20.74% {
        transform: rotateZ(0deg) translateX(-18px);
    }

    28.66%, 70.74% {
        transform: rotateZ(180deg) translateX(-18px);
    }

    78.66% {
        transform: rotateZ(0deg) translateX(-18px);
    }
}

@-webkit-keyframes left {
    4% {
        transform: rotateZ(90deg);
    }

    10%, 40% {
        transform: rotateZ(0deg);
    }

    46%, 54% {
        transform: rotateZ(90deg);
    }

    60%, 90% {
        transform: rotateZ(0deg);
    }

    96% {
        transform: rotateZ(90deg);
    }
}

@keyframes left {
    4% {
        transform: rotateZ(90deg);
    }

    10%, 40% {
        transform: rotateZ(0deg);
    }

    46%, 54% {
        transform: rotateZ(90deg);
    }

    60%, 90% {
        transform: rotateZ(0deg);
    }

    96% {
        transform: rotateZ(90deg);
    }
}

@-webkit-keyframes right {
    4% {
        transform: rotateZ(-90deg);
    }

    10%, 40% {
        transform: rotateZ(0deg);
    }

    46%, 54% {
        transform: rotateZ(-90deg);
    }

    60%, 90% {
        transform: rotateZ(0deg);
    }

    96% {
        transform: rotateZ(-90deg);
    }
}

@keyframes right {
    4% {
        transform: rotateZ(-90deg);
    }

    10%, 40% {
        transform: rotateZ(0deg);
    }

    46%, 54% {
        transform: rotateZ(-90deg);
    }

    60%, 90% {
        transform: rotateZ(0deg);
    }

    96% {
        transform: rotateZ(-90deg);
    }
}

@-webkit-keyframes book {
    4% {
        transform: rotateZ(-90deg);
    }

    10%, 40% {
        transform: rotateZ(0deg);
        transform-origin: 2px 2px;
    }

    40.01%, 59.99% {
        transform-origin: 30px 2px;
    }

    46%, 54% {
        transform: rotateZ(90deg);
    }

    60%, 90% {
        transform: rotateZ(0deg);
        transform-origin: 2px 2px;
    }

    96% {
        transform: rotateZ(-90deg);
    }
}

@keyframes book {
    4% {
        transform: rotateZ(-90deg);
    }

    10%, 40% {
        transform: rotateZ(0deg);
        transform-origin: 2px 2px;
    }

    40.01%, 59.99% {
        transform-origin: 30px 2px;
    }

    46%, 54% {
        transform: rotateZ(90deg);
    }

    60%, 90% {
        transform: rotateZ(0deg);
        transform-origin: 2px 2px;
    }

    96% {
        transform: rotateZ(-90deg);
    }
}