/* ============================================================
   JeFlip Viewer v2.0 — CSS
   Visor de catálogo flipbook con imágenes pre-renderizadas
   ============================================================ */

/* --- Variables --- */
:root {
    --jeflip-bg: #1e1e22;
    --jeflip-bg-overlay: rgba(30, 30, 34, 0.95);
    --jeflip-controls-bg: rgba(255, 255, 255, 0.08);
    --jeflip-controls-hover: rgba(255, 255, 255, 0.15);
    --jeflip-controls-text: rgba(255, 255, 255, 0.85);
    --jeflip-controls-text-dim: rgba(255, 255, 255, 0.5);
    --jeflip-shadow: rgba(0, 0, 0, 0.4);
    --jeflip-page-shadow: rgba(0, 0, 0, 0.25);
    --jeflip-accent: #4a9eff;
    --jeflip-radius: 8px;
    --jeflip-transition: 0.2s ease;
}

/* --- Reset dentro del visor --- */
.jeflip-viewer *,
.jeflip-viewer *::before,
.jeflip-viewer *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ============================================================
   TRIGGER (Lightbox — botón en footer)
   ============================================================ */
.jeflip-trigger {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: transform var(--jeflip-transition), opacity var(--jeflip-transition);
    -webkit-tap-highlight-color: transparent;
}

.jeflip-trigger:hover,
.jeflip-trigger:focus-visible {
    transform: scale(1.05);
}

.jeflip-trigger:active {
    transform: scale(0.97);
}

.jeflip-trigger-thumb {
    width: 120px;
    height: auto;
    border-radius: var(--jeflip-radius);
    box-shadow: 0 4px 20px var(--jeflip-shadow);
    transition: box-shadow var(--jeflip-transition);
}

.jeflip-trigger:hover .jeflip-trigger-thumb {
    box-shadow: 0 6px 30px var(--jeflip-shadow), 0 0 0 2px var(--jeflip-accent);
}

.jeflip-trigger-label {
    font-size: 13px;
    font-weight: 500;
    color: inherit;
    opacity: 0.8;
    letter-spacing: 0.02em;
}

.jeflip-trigger-text {
    font-size: 16px;
    padding: 12px 24px;
    background: var(--jeflip-controls-bg);
    border-radius: var(--jeflip-radius);
    color: var(--jeflip-controls-text);
}

/* ============================================================
   OVERLAY (Lightbox)
   ============================================================ */
.jeflip-overlay {
    position: fixed;
    inset: 0;
    z-index: 999999;
    background: var(--jeflip-bg-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
}

.jeflip-overlay.jeflip-active {
    opacity: 1;
    visibility: visible;
}

/* ============================================================
   VISOR (contenedor principal)
   ============================================================ */
.jeflip-viewer {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--jeflip-bg);
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

/* Modo embed */
.jeflip-embed-wrap .jeflip-viewer {
    border-radius: var(--jeflip-radius);
}

/* ============================================================
   BOOK (el libro abierto)
   ============================================================ */
.jeflip-book-area {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 20px 60px;
    perspective: 2000px;
}

.jeflip-book {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: 100%;
}

/* ============================================================
   PÁGINAS — Modo doble (escritorio)
   ============================================================ */
.jeflip-spread {
    display: flex;
    align-items: stretch;
    max-height: calc(100vh - 120px);
    filter: drop-shadow(0 8px 40px var(--jeflip-shadow));
}

.jeflip-embed-wrap .jeflip-spread {
    max-height: 100%;
}

.jeflip-page {
    position: relative;
    flex: 0 0 auto;
    overflow: hidden;
    background: #fff;
}

.jeflip-page img {
    display: block;
    width: auto;
    height: 100%;
    max-height: calc(100vh - 120px);
    object-fit: contain;
    /* Calidad de imagen perfecta — sin procesamiento */
    image-rendering: auto;
    -webkit-font-smoothing: antialiased;
}

.jeflip-embed-wrap .jeflip-page img {
    max-height: 100%;
}

/* Sombra de encuadernación central */
.jeflip-page-left {
    box-shadow: inset -8px 0 20px -8px var(--jeflip-page-shadow);
}

.jeflip-page-right {
    box-shadow: inset 8px 0 20px -8px var(--jeflip-page-shadow);
}

/* Página vacía (cuando estamos en portada o contraportada) */
.jeflip-page-empty {
    background: #f5f5f0;
    min-width: 100px;
}

/* Loader de página */
.jeflip-page-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f0;
}

.jeflip-page-loader::after {
    content: '';
    width: 32px;
    height: 32px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--jeflip-accent);
    border-radius: 50%;
    animation: jeflip-spin 0.8s linear infinite;
}

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

/* ============================================================
   ANIMACIÓN 3D — Paso de página
   ============================================================ */
.jeflip-flipping {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    transform-style: preserve-3d;
    transform-origin: left center;
    z-index: 10;
    pointer-events: none;
}

.jeflip-flipping.jeflip-flip-right {
    right: 0;
    left: auto;
    transform-origin: left center;
}

.jeflip-flipping.jeflip-flip-left {
    left: 0;
    transform-origin: right center;
}

.jeflip-flip-front,
.jeflip-flip-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    overflow: hidden;
}

.jeflip-flip-back {
    transform: rotateY(180deg);
}

.jeflip-flip-front img,
.jeflip-flip-back img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Animación hacia adelante (página gira de derecha a izquierda) */
@keyframes jeflip-turn-forward {
    0%   { transform: rotateY(0deg); }
    100% { transform: rotateY(-180deg); }
}

/* Animación hacia atrás (página gira de izquierda a derecha) */
@keyframes jeflip-turn-backward {
    0%   { transform: rotateY(-180deg); }
    100% { transform: rotateY(0deg); }
}

.jeflip-flipping.jeflip-anim-forward {
    animation: jeflip-turn-forward 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.jeflip-flipping.jeflip-anim-backward {
    animation: jeflip-turn-backward 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* Sombra dinámica durante el giro */
.jeflip-flip-shadow {
    position: absolute;
    inset: 0;
    background: linear-gradient(to left, rgba(0,0,0,0.15) 0%, transparent 60%);
    pointer-events: none;
}

/* ============================================================
   CONTROLES — Barra inferior
   ============================================================ */
.jeflip-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    background: var(--jeflip-controls-bg);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-radius: 40px;
    margin-bottom: 16px;
    z-index: 10;
}

.jeflip-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--jeflip-controls-text);
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--jeflip-transition), transform var(--jeflip-transition);
    -webkit-tap-highlight-color: transparent;
    flex-shrink: 0;
}

.jeflip-btn:hover {
    background: var(--jeflip-controls-hover);
}

.jeflip-btn:active {
    transform: scale(0.92);
}

.jeflip-btn:disabled {
    opacity: 0.3;
    cursor: default;
    pointer-events: none;
}

.jeflip-btn svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Indicador de página */
.jeflip-page-indicator {
    font-size: 13px;
    color: var(--jeflip-controls-text-dim);
    min-width: 80px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.03em;
    white-space: nowrap;
    padding: 0 8px;
}

/* Separador */
.jeflip-sep {
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.12);
    margin: 0 4px;
}

/* ============================================================
   FLECHAS LATERALES de navegación
   ============================================================ */
.jeflip-nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 20;
    width: 48px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--jeflip-controls-bg);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: none;
    color: var(--jeflip-controls-text);
    cursor: pointer;
    transition: background var(--jeflip-transition), opacity var(--jeflip-transition);
    opacity: 0;
    -webkit-tap-highlight-color: transparent;
}

.jeflip-viewer:hover .jeflip-nav-arrow,
.jeflip-nav-arrow:focus-visible {
    opacity: 1;
}

.jeflip-nav-arrow:hover {
    background: var(--jeflip-controls-hover);
}

.jeflip-nav-arrow:disabled {
    opacity: 0 !important;
    cursor: default;
    pointer-events: none;
}

.jeflip-nav-prev {
    left: 0;
    border-radius: 0 var(--jeflip-radius) var(--jeflip-radius) 0;
}

.jeflip-nav-next {
    right: 0;
    border-radius: var(--jeflip-radius) 0 0 var(--jeflip-radius);
}

.jeflip-nav-arrow svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ============================================================
   BOTÓN CERRAR (Lightbox)
   ============================================================ */
.jeflip-close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 30;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--jeflip-controls-bg);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: none;
    border-radius: 50%;
    color: var(--jeflip-controls-text);
    cursor: pointer;
    transition: background var(--jeflip-transition), transform var(--jeflip-transition);
    -webkit-tap-highlight-color: transparent;
}

.jeflip-close:hover {
    background: var(--jeflip-controls-hover);
}

.jeflip-close:active {
    transform: scale(0.9);
}

.jeflip-close svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ============================================================
   ZOOM
   ============================================================ */
.jeflip-zoom-container {
    overflow: hidden;
    cursor: grab;
}

.jeflip-zoom-container.jeflip-zoomed {
    cursor: grab;
}

.jeflip-zoom-container.jeflip-dragging {
    cursor: grabbing;
}

.jeflip-zoom-inner {
    transition: transform 0.3s ease;
    transform-origin: center center;
}

.jeflip-zoom-container.jeflip-dragging .jeflip-zoom-inner {
    transition: none;
}

/* ============================================================
   RESPONSIVE — Móvil (página única)
   ============================================================ */
@media (max-width: 768px) {
    .jeflip-book-area {
        padding: 12px 8px;
    }

    .jeflip-page img {
        max-height: calc(100vh - 100px);
        max-width: 100vw;
        width: 100%;
        height: auto;
    }

    .jeflip-embed-wrap .jeflip-page img {
        max-height: 100%;
    }

    .jeflip-controls {
        gap: 2px;
        padding: 8px 12px;
        margin-bottom: 10px;
    }

    .jeflip-btn {
        width: 36px;
        height: 36px;
    }

    .jeflip-btn svg {
        width: 18px;
        height: 18px;
    }

    .jeflip-page-indicator {
        font-size: 12px;
        min-width: 60px;
    }

    .jeflip-nav-arrow {
        width: 36px;
        height: 60px;
        opacity: 0.6;
    }

    .jeflip-nav-arrow svg {
        width: 20px;
        height: 20px;
    }

    .jeflip-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }

    /* En móvil, la sombra central no tiene sentido con página única */
    .jeflip-page-left,
    .jeflip-page-right {
        box-shadow: none;
    }
}

/* ============================================================
   FULLSCREEN
   ============================================================ */
.jeflip-viewer:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
}

.jeflip-viewer:fullscreen {
    width: 100vw;
    height: 100vh;
}

/* ============================================================
   ACCESIBILIDAD
   ============================================================ */
.jeflip-btn:focus-visible,
.jeflip-close:focus-visible,
.jeflip-nav-arrow:focus-visible,
.jeflip-trigger:focus-visible {
    outline: 2px solid var(--jeflip-accent);
    outline-offset: 2px;
}

/* Respetar preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
    .jeflip-flipping.jeflip-anim-forward,
    .jeflip-flipping.jeflip-anim-backward {
        animation-duration: 0.01s;
    }
    .jeflip-zoom-inner {
        transition-duration: 0.01s;
    }
}