/* Flipbook Viewer Core - Etapa 1. UI mejorada: toolbar limpia, flechas laterales, contador en español. */
.flipbook-viewer-core {
    --fvb-bg: #f8f9fa;
    --fvb-surface: #ffffff;
    --fvb-border: #e2e6ea;
    --fvb-text: #1a1d21;
    --fvb-text-muted: #5c636a;
    --fvb-primary: #0d6efd;
    --fvb-primary-hover: #0b5ed7;
    --fvb-arrow-bg: rgba(255, 255, 255, 0.95);
    --fvb-arrow-border: #dee2e6;
    --fvb-arrow-hover: #0d6efd;
    --fvb-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --fvb-radius: 10px;
    --fvb-radius-inner: 8px;
    background: var(--fvb-surface);
    border-radius: var(--fvb-radius);
    box-shadow: var(--fvb-shadow);
    overflow: hidden;
}

.flipbook-viewer-header {
    padding: 1rem 1.25rem 0.5rem;
}

.flipbook-viewer-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--fvb-text);
    margin: 0;
    letter-spacing: -0.01em;
}

/* Toolbar: solo contador + acciones */
.flipbook-viewer-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0.75rem 1.25rem;
    background: var(--fvb-bg);
    border-bottom: 1px solid var(--fvb-border);
}

.flipbook-viewer-toolbar-counter {
    display: flex;
    align-items: center;
    min-height: 2.25rem;
}

.flipbook-viewer-zoom {
    display: inline-flex;
    align-items: stretch;
    height: 2.25rem;
    background: var(--fvb-surface);
    border: 1px solid var(--fvb-border);
    border-radius: 8px;
    overflow: visible;
    position: relative;
}

.flipbook-viewer-zoom-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    min-width: 2.25rem;
    height: 2.25rem;
    min-height: 2.25rem;
    padding: 0;
    border: none;
    border-right: 1px solid var(--fvb-border);
    background: var(--fvb-surface);
    color: var(--fvb-text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: color 0.15s, background 0.15s;
    position: relative;
    z-index: 2;
    box-sizing: border-box;
}

.flipbook-viewer-zoom-btn:last-of-type {
    border-right: none;
}

.flipbook-viewer-zoom-btn:hover:not(:disabled) {
    background: var(--fvb-bg);
    color: var(--fvb-primary);
}

.flipbook-viewer-zoom-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.flipbook-viewer-zoom-btn:focus {
    outline: none;
}

.flipbook-viewer-zoom-symbol {
    display: block;
    line-height: 0;
}

.flipbook-viewer-zoom-symbol svg {
    display: block;
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.flipbook-viewer-zoom-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 3.25rem;
    height: 2.25rem;
    padding: 0 0.5rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--fvb-text);
    text-align: center;
    line-height: 1;
    box-sizing: border-box;
    pointer-events: none;
}

.flipbook-viewer-page-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--fvb-text);
    letter-spacing: 0.02em;
    padding: 0 0.5rem;
    min-width: 8rem;
    text-align: center;
}

.flipbook-viewer-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.flipbook-viewer-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--fvb-primary);
    background: var(--fvb-surface);
    border: 1px solid var(--fvb-arrow-border);
    border-radius: 6px;
    text-decoration: none;
    transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.flipbook-viewer-btn:hover {
    color: var(--fvb-primary-hover);
    background: #f0f4ff;
    border-color: var(--fvb-primary);
}

.flipbook-viewer-btn i {
    font-size: 0.9em;
}

/* Área principal: flechas + zona de vista. Altura fija para que el zoom no expanda el contenedor. */
.flipbook-viewer-view-wrap {
    position: relative;
    display: flex;
    align-items: stretch;
    justify-content: center;
    min-height: 420px;
    height: min(460px, 78vh);
    padding: 1rem 0;
    background: linear-gradient(180deg, #eef0f3 0%, #e4e7eb 100%);
    box-sizing: border-box;
}

/* Página individual (Ver revista): área amplia para ver la revista lo más completa posible */
.flipbook-viewer-mode-full .flipbook-viewer-view-wrap {
    min-height: 620px;
    height: min(780px, 90vh);
    padding: 0.5rem 0;
}

/* Solo el contenido (PDF/portada) hace scroll cuando hay zoom; en vista base la portada entra completa. */
.flipbook-viewer-view-zone {
    flex: 1 1 0;
    min-width: 0;
    min-height: 0;
    max-width: 100%;
    overflow: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* Con portada visible: el área se ajusta al contenido para que la portada entre completa sin scroll */
.flipbook-viewer-view-zone.flipbook-viewer-view-zone--cover {
    overflow: hidden;
}

.flipbook-viewer-view-zone.flipbook-viewer-view-zone--cover .flipbook-viewer-view {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
}

.flipbook-viewer-view-zone.flipbook-viewer-view-zone--cover .flipbook-viewer-cover {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.flipbook-viewer-view {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.flipbook-viewer-cover,
.flipbook-viewer-canvas {
    border-radius: var(--fvb-radius-inner);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
    vertical-align: top;
}

.flipbook-viewer-canvas {
    max-width: none;
}

.flipbook-viewer-cover {
    height: auto;
    display: block;
}

/* Botones laterales: centrados verticalmente, flechas SVG visibles y con contraste */
.flipbook-viewer-nav-btn {
    flex-shrink: 0;
    align-self: center;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    min-width: 56px;
    height: 56px;
    margin: 0 0.5rem;
    padding: 0;
    background: #ffffff;
    border: 2px solid #495057;
    border-radius: 50%;
    color: #1a1d21;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.1s, box-shadow 0.15s;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}

.flipbook-viewer-nav-icon {
    display: block;
    line-height: 0;
}

.flipbook-viewer-nav-icon svg {
    display: block;
    width: 28px;
    height: 28px;
    fill: currentColor;
}

.flipbook-viewer-nav-btn:hover:not(:disabled) {
    background: #f0f4ff;
    border-color: var(--fvb-primary);
    color: var(--fvb-primary-hover);
    box-shadow: 0 4px 14px rgba(13, 110, 253, 0.25);
}

.flipbook-viewer-nav-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.flipbook-viewer-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: #e9ecef;
    border-color: #adb5bd;
    color: #868e96;
}

.flipbook-viewer-nav-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.35);
}

/* Loading */
.flipbook-viewer-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.92);
    z-index: 5;
}

.flipbook-viewer-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--fvb-border);
    border-top-color: var(--fvb-primary);
    border-radius: 50%;
    animation: flipbook-viewer-spin 0.7s linear infinite;
}

@keyframes flipbook-viewer-spin {
    to { transform: rotate(360deg); }
}

.flipbook-viewer-loading-text {
    margin: 0.75rem 0 0;
    font-size: 0.875rem;
    color: var(--fvb-text-muted);
}

/* Error */
.flipbook-viewer-error {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: #b02a37;
    background: #f8d7da;
    border-radius: 6px;
    z-index: 6;
}

/* Modo embebido (Home): área más amplia para la sección Revista Digital */
.flipbook-viewer-mode-embedded .flipbook-viewer-view-wrap {
    min-height: 440px;
    height: 82vh;
    max-height: 82vh;
    padding: 0.75rem 0;
}

.flipbook-viewer-mode-embedded .flipbook-viewer-view-wrap .flipbook-viewer-cover,
.flipbook-viewer-mode-embedded .flipbook-viewer-view-wrap .flipbook-viewer-canvas {
    max-height: none;
    object-fit: contain;
}

.flipbook-viewer-mode-embedded .flipbook-viewer-nav-btn {
    width: 44px;
    min-width: 44px;
    height: 44px;
    margin: 0 0.35rem;
    font-size: 1.25rem;
}

/* Responsive: tablet */
@media (max-width: 992px) {
    .flipbook-viewer-view-wrap {
        min-height: 380px;
        height: min(420px, 72vh);
        max-height: 72vh;
        padding: 1rem 0;
    }
    .flipbook-viewer-mode-embedded .flipbook-viewer-view-wrap {
        min-height: 400px;
        height: 75vh;
        max-height: 75vh;
    }
    .flipbook-viewer-mode-full .flipbook-viewer-view-wrap {
        min-height: 500px;
        height: min(560px, 85vh);
        max-height: 85vh;
    }
    .flipbook-viewer-nav-btn {
        width: 48px;
        min-width: 48px;
        height: 48px;
        margin: 0 0.4rem;
    }
    .flipbook-viewer-nav-icon svg {
        width: 24px;
        height: 24px;
    }
}

/* Responsive: móvil — 100% natural, menos espacio blanco, más altura útil */
@media (max-width: 768px) {
    .flipbook-viewer-header {
        padding: 0.75rem 1rem 0.5rem;
    }
    .flipbook-viewer-title {
        font-size: 1.15rem;
    }
    .flipbook-viewer-toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 0.65rem 1rem;
    }
    .flipbook-viewer-toolbar-counter {
        justify-content: center;
    }
    .flipbook-viewer-page-label {
        min-width: auto;
    }
    .flipbook-viewer-actions {
        justify-content: center;
    }
    .flipbook-viewer-zoom {
        justify-content: center;
    }
    .flipbook-viewer-view-wrap {
        min-height: 320px;
        height: min(520px, 88vh);
        max-height: 88vh;
        padding: 0.35rem 0;
        flex-wrap: nowrap;
    }
    .flipbook-viewer-mode-full .flipbook-viewer-view-wrap {
        min-height: 400px;
        height: min(560px, 88vh);
        max-height: 88vh;
        padding: 0.35rem 0;
    }
    .flipbook-viewer-nav-btn {
        width: 44px;
        min-width: 44px;
        height: 44px;
        margin: 0 0.25rem;
    }
    .flipbook-viewer-nav-icon svg {
        width: 22px;
        height: 22px;
    }
    .flipbook-viewer-mode-embedded .flipbook-viewer-view-wrap {
        min-height: 300px;
        height: 80vh;
        max-height: 80vh;
        padding: 0.35rem 0;
    }
    .flipbook-viewer-mode-embedded .flipbook-viewer-nav-btn {
        width: 40px;
        min-width: 40px;
        height: 40px;
    }
    .flipbook-viewer-mode-embedded .flipbook-viewer-nav-icon svg {
        width: 20px;
        height: 20px;
    }
}

/* Botón fullscreen móvil: overlay central, solo en viewport móvil */
.flipbook-viewer-fullscreen-btn {
    display: none;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 25;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    transition: background 0.2s, transform 0.2s;
    -webkit-tap-highlight-color: transparent;
}
.flipbook-viewer-fullscreen-btn:hover,
.flipbook-viewer-fullscreen-btn:focus {
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
}
.flipbook-viewer-fullscreen-btn svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}
@media (min-width: 769px) {
    .flipbook-viewer-fullscreen-btn {
        display: none !important;
    }
}
@media (max-width: 768px) {
    .flipbook-viewer-view-zone {
        position: relative;
    }
    .flipbook-viewer-fullscreen-btn {
        display: flex;
    }
}

/* Zonas táctiles fullscreen móvil: ocultas por defecto, visibles solo en fullscreen */
.flipbook-viewer-tap-prev,
.flipbook-viewer-tap-next {
    display: none;
    position: absolute;
    top: 0;
    bottom: 0;
    width: 33%;
    z-index: 20;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.flipbook-viewer-tap-prev {
    left: 0;
}
.flipbook-viewer-tap-next {
    right: 0;
}

/* Fullscreen móvil: flechas arriba fuera del contenido. Sin swipe ni tap-navegación. */
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-view-wrap {
    min-height: 100vh;
    height: 100vh;
    max-height: 100vh;
    padding: 0;
    display: grid;
    grid-template-rows: auto 1fr;
    grid-template-columns: 1fr 1fr;
}
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-arrow-prev {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
    align-self: center;
    margin: 0.5rem 0.75rem;
}
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-arrow-next {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
    margin: 0.5rem 0.75rem;
}
/* Zona de revista debajo de las flechas, sin overlays que interfieran con hotspots */
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-view-zone {
    grid-column: 1 / -1;
    grid-row: 2;
    flex: 1 1 0;
    min-height: 0;
    width: 100%;
    max-width: 100%;
}
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-fullscreen-btn {
    display: none;
}
/* Fullscreen móvil: tap zones desactivadas, no hay navegación por tap */
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-tap-prev,
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-tap-next {
    display: none;
    pointer-events: none;
}
.flipbook-viewer-core.flipbook-viewer--fullscreen-mobile .flipbook-viewer-toolbar {
    flex-shrink: 0;
}

/* Hotspots - clickable zones on /flipbook/{slug} only */
.flipbook-hotspots-layer {
    pointer-events: none;
    box-sizing: border-box;
}
.flipbook-hotspot {
    display: block;
    pointer-events: auto;
    cursor: pointer;
    transition: background 0.15s ease;
    box-sizing: border-box;
    touch-action: manipulation;
}
.flipbook-hotspot:hover {
    background: rgba(13, 110, 253, 0.15);
}