/*
 * MG PDF Book viewer
 * Book-style PDF presentation for the Methodical Collection and Elementor shortcode.
 */
.mg-pdf-book {
    --mg-book-bg: #f6f8fb;
    --mg-book-border: rgba(28, 48, 74, 0.10);
    --mg-book-shadow: 0 20px 55px rgba(29, 44, 66, 0.14);
    --mg-book-accent: #4b83fc;
    --mg-book-text: #243247;
    --mg-page-ratio: 595 / 842;
    width: 100%;
    max-width: 1180px;
    margin: 30px auto 48px;
    padding: 24px 26px 20px;
    box-sizing: border-box;
    border: 1px solid var(--mg-book-border);
    border-radius: 24px;
    background: var(--mg-book-bg);
    color: var(--mg-book-text);
}

.mg-pdf-book * {
    box-sizing: border-box;
}

.mg-pdf-book__viewport {
    position: relative;
    width: min(100%, 1080px);
    margin: 0 auto;
    padding: 2px 52px;
    perspective: 2200px;
}

.mg-pdf-book__book {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
    width: 100%;
    margin: 0 auto;
    filter: drop-shadow(0 15px 28px rgba(26, 39, 57, 0.13));
    transform-style: preserve-3d;
}

.mg-pdf-book__book::after {
    content: "";
    position: absolute;
    z-index: 8;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    transform: translateX(-1px);
    background: linear-gradient(to right, rgba(0, 0, 0, 0.14), rgba(255, 255, 255, 0.9), rgba(0, 0, 0, 0.10));
    box-shadow: 0 0 14px rgba(0, 0, 0, 0.13);
    pointer-events: none;
}

.mg-pdf-book__page {
    position: relative;
    overflow: hidden;
    aspect-ratio: var(--mg-page-ratio);
    background: #fff;
    border: 1px solid rgba(38, 47, 61, 0.10);
}

.mg-pdf-book__page--left {
    border-radius: 12px 2px 2px 12px;
    transform-origin: right center;
}

.mg-pdf-book__page--right {
    border-radius: 2px 12px 12px 2px;
    transform-origin: left center;
}

.mg-pdf-book__page canvas,
.mg-pdf-book__flip-face canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #fff;
}

.mg-pdf-book__page.is-empty::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #fbfbfb, #f1f2f4);
}

.mg-pdf-book__nav {
    position: absolute;
    z-index: 30;
    top: 50%;
    width: 42px;
    height: 42px;
    margin: 0;
    padding: 0;
    transform: translateY(-50%);
    border: 0;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 6px 20px rgba(31, 48, 72, 0.17);
    color: #263750;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}

.mg-pdf-book__nav:hover:not(:disabled),
.mg-pdf-book__nav:focus-visible:not(:disabled) {
    transform: translateY(-50%) scale(1.06);
    box-shadow: 0 8px 24px rgba(31, 48, 72, 0.23);
    outline: none;
}

.mg-pdf-book__nav:disabled {
    opacity: .28;
    cursor: default;
}

.mg-pdf-book__nav--prev { left: 0; }
.mg-pdf-book__nav--next { right: 0; }

.mg-pdf-book__nav::before {
    content: "";
    position: absolute;
    top: 50%;
    width: 10px;
    height: 10px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
}

.mg-pdf-book__nav--prev::before {
    left: 17px;
    transform: translateY(-50%) rotate(-135deg);
}

.mg-pdf-book__nav--next::before {
    right: 17px;
    transform: translateY(-50%) rotate(45deg);
}

.mg-pdf-book__footer {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    margin-top: 14px;
    gap: 12px;
}

.mg-pdf-book__counter {
    min-width: 92px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.86);
    color: #506078;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
}

.mg-pdf-book__loading,
.mg-pdf-book__error {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    padding: 28px;
    text-align: center;
    border-radius: 16px;
    background: #fff;
    color: #5b6677;
}

.mg-pdf-book__loading::before {
    content: "";
    width: 26px;
    height: 26px;
    margin-right: 12px;
    border: 3px solid rgba(75, 131, 252, 0.20);
    border-top-color: var(--mg-book-accent);
    border-radius: 50%;
    animation: mg-pdf-book-spin .8s linear infinite;
}

@keyframes mg-pdf-book-spin {
    to { transform: rotate(360deg); }
}

.mg-pdf-book__fallback {
    width: 100%;
    min-height: 720px;
    border: 0;
    border-radius: 14px;
    background: #fff;
}

.mg-pdf-book__flip {
    position: absolute;
    z-index: 20;
    top: 0;
    width: 50%;
    height: 100%;
    transform-style: preserve-3d;
    pointer-events: none;
}

.mg-pdf-book__flip.is-next {
    left: 50%;
    transform-origin: left center;
    animation: mg-pdf-book-next .66s cubic-bezier(.48,.04,.22,1) forwards;
}

.mg-pdf-book__flip.is-prev {
    left: 0;
    transform-origin: right center;
    animation: mg-pdf-book-prev .66s cubic-bezier(.48,.04,.22,1) forwards;
}

.mg-pdf-book__flip-face {
    position: absolute;
    inset: 0;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(38, 47, 61, 0.10);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.mg-pdf-book__flip-front {
    box-shadow: -8px 3px 18px rgba(0, 0, 0, 0.12);
}

.mg-pdf-book__flip-back {
    transform: rotateY(180deg);
    box-shadow: 8px 3px 18px rgba(0, 0, 0, 0.12);
}

@keyframes mg-pdf-book-next {
    0% { transform: rotateY(0deg); }
    45% { box-shadow: -18px 6px 28px rgba(0,0,0,.18); }
    100% { transform: rotateY(-180deg); }
}

@keyframes mg-pdf-book-prev {
    0% { transform: rotateY(0deg); }
    45% { box-shadow: 18px 6px 28px rgba(0,0,0,.18); }
    100% { transform: rotateY(180deg); }
}

.mg-pdf-book.is-loading .mg-pdf-book__viewport,
.mg-pdf-book.is-loading .mg-pdf-book__footer,
.mg-pdf-book.is-error .mg-pdf-book__viewport,
.mg-pdf-book.is-error .mg-pdf-book__footer {
    display: none;
}

.mg-pdf-book:not(.is-loading) .mg-pdf-book__loading,
.mg-pdf-book:not(.is-error) .mg-pdf-book__error {
    display: none;
}

@media (max-width: 767px) {
    .mg-pdf-book {
        margin: 22px auto 36px;
        padding: 16px 10px 14px;
        border-radius: 18px;
    }

    .mg-pdf-book__viewport {
        width: 100%;
        padding: 0 42px;
    }

    .mg-pdf-book__book {
        display: block;
        max-width: 520px;
    }

    .mg-pdf-book__book::after,
    .mg-pdf-book__page--right {
        display: none;
    }

    .mg-pdf-book__page--left {
        width: 100%;
        border-radius: 10px;
        transform-origin: center center;
    }

    .mg-pdf-book__flip {
        left: 0 !important;
        width: 100%;
    }

    .mg-pdf-book__flip.is-next {
        transform-origin: left center;
    }

    .mg-pdf-book__flip.is-prev {
        transform-origin: right center;
    }

    .mg-pdf-book__nav {
        width: 36px;
        height: 36px;
    }

    .mg-pdf-book__nav--prev::before { left: 15px; }
    .mg-pdf-book__nav--next::before { right: 15px; }

    .mg-pdf-book__loading,
    .mg-pdf-book__error {
        min-height: 260px;
    }

    .mg-pdf-book__fallback {
        min-height: 520px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .mg-pdf-book__flip.is-next,
    .mg-pdf-book__flip.is-prev,
    .mg-pdf-book__nav,
    .mg-pdf-book__loading::before {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
}