html.flipbook-open,
body.flipbook-open {
    overflow: hidden !important;
    height: 100% !important;
}

.flipbook-overlay {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: none;
    background: rgba(8, 12, 20, 0.82);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    overflow: hidden;
}

.flipbook-overlay.is-open {
    display: block;
}

.flipbook-overlay__dialog {
    position: absolute;
    inset: 0px;
    background: #f4f6f9;
    border-radius: 0px;
    box-shadow: 0 30px 100px rgba(0, 0, 0, 0.45);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: calc(100vh);
    max-height: calc(100vh);
}

.flipbook-overlay__header {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0px;
    padding: 5px 15px;
    background: linear-gradient(135deg, #ffffff, #eef2f7);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.flipbook-overlay__title-wrap {
    min-width: 0;
    display: flex;
    align-items: center;
    flex:2;
}
.flipbook-overlay__indicator-wrap {
    min-width: 0;
    display: flex;
    align-items: center;
    flex:3;
}
.flipbook-overlay__close-wrap {
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex:1;
}

.flipbook-overlay__title {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
    line-height: 1.2;
}

.flipbook-overlay__subtitle {
    margin: 4px 0 0;
    font-size: 12px;
    color: #6b7280;
}

.flipbook-overlay__close {
    appearance: none;
    border: none;
    background: #ffffff;
    color: #111827;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.14);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
    flex: 0 0 auto;
}

.flipbook-overlay__close:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

.flipbook-overlay__body {
    position: relative;
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at top left, rgba(255,255,255,0.9), rgba(244,246,249,0.7) 40%, rgba(230,235,242,0.85)),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
}

.flipbook-stage {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.flipbook-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
    color: #374151;
    text-align: center;
    padding: 10px;
    background: rgba(244, 246, 249, 0.92);
}

.flipbook-loading.hidden {
    display: none;
}

.flipbook-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid rgba(59, 130, 246, 0.18);
    border-top-color: #2563eb;
    border-radius: 50%;
    animation: flipSpin 0.8s linear infinite;
    margin-bottom: 14px;
}

@keyframes flipSpin {
    to {
        transform: rotate(360deg);
    }
}

.flipbook-error {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 6;
    padding: 24px;
    text-align: center;
    color: #991b1b;
    background: rgba(255, 245, 245, 0.96);
}

.flipbook-error.is-visible {
    display: flex;
}

.flipbook-shell {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.flipbook-book {
    visibility: hidden;
    margin: 0 auto;
    position: relative;
    max-width: 100%;
    max-height: 100%;
}

.flipbook-book.ready {
    visibility: visible;
}

.flipbook-book .page {
    background: #ffffff;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none !important;
    margin: 0 !important;
    padding: 0 !important;
    box-sizing: border-box !important;
}

.flipbook-book .page canvas {
    width: 100% !important;
    height: 100% !important;
    display: block !important;
}

.flipbook-overlay__footer {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 5px 15px;
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.flipbook-btn {
    appearance: none;
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: #ffffff;
    color: #111827;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s ease;
    min-width: 110px;
}

.flipbook-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.10);
}

.flipbook-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.flipbook-page-indicator {
    min-width: 130px;
    text-align: center;
    font-size: 14px;
    font-weight: 700;
    color: #374151;
    padding: 0 6px;
}

.flipbook-trigger {
    display: inline-block;
    cursor: pointer;
}

.flipbook-trigger img {
    display: block;
    max-width: 100%;
    height: auto;
}

@media (max-width: 1199.98px) {
    .flipbook-overlay__dialog {
        inset: 8px;
        border-radius: 14px;
    }
}

@media (max-width: 991.98px) {
    .flipbook-overlay__header {
        padding: 12px 14px;
    }

    .flipbook-overlay__body {
        padding: 8px;
    }

    .flipbook-overlay__footer {
        gap: 10px;
        padding: 12px 14px 14px;
    }

    .flipbook-btn {
        min-width: 100px;
        padding: 9px 14px;
    }
}

@media (max-width: 767.98px) {
    .flipbook-overlay__dialog {
        inset: 0;
        border-radius: 0;
        height: 100vh;
        max-height: 100vh;
    }

    .flipbook-overlay__title {
        font-size: 17px;
    }

    .flipbook-overlay__subtitle {
        font-size: 11px;
    }

    .flipbook-overlay__header {
        padding: 10px 12px;
    }

    .flipbook-overlay__body {
        padding: 6px;
    }

    .flipbook-overlay__footer {
        gap: 8px;
        padding: 10px 12px 12px;
    }

    .flipbook-page-indicator {
        width: 100%;
        order: -1;
        min-width: 100%;
    }

    .flipbook-btn {
        flex: 1 1 auto;
        min-width: 0;
    }

    .flipbook-overlay__close {
        width: 40px;
        height: 40px;
        font-size: 24px;
    }
}