/* ============================================================
   PDF Gallery — Estilos
   Compatible con WordPress / Kubio
   ============================================================ */

/* ── Variables ───────────────────────────────────────────── */
.pdf-gallery-wrapper {
    --pdf-columns: 3;
    --pdf-gap: 1.5rem;
    --pdf-radius: 12px;
    --pdf-shadow: 0 2px 8px rgba(0, 0, 0, 0.10);
    --pdf-shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.18);
    --pdf-accent: #c4b8dc;
    --pdf-accent-hover: #b0a2cc;
    --pdf-bg: #c4b8dc;
    --pdf-border: #e5e7eb;
/*    --pdf-text: #111827; */
    --pdf-text: #ffffff;
    --pdf-muted: #6b7280;
    --pdf-transition: 0.22s ease;

    font-family: inherit;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    box-sizing: border-box;
}

/* Contenedor interior al 80% */
.pdf-gallery-wrapper > *,
.pdf-gallery-wrapper > .pdf-gallery-grid {
    width: 80%;
    margin-left: auto;
    margin-right: auto;
}

/* ── Título de galería ───────────────────────────────────── */
.pdf-gallery-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--pdf-text);
    margin: 0 0 1.5rem;
    text-align: center;
}

/* ── Grid ────────────────────────────────────────────────── */
.pdf-gallery-grid {
    display: grid;
    grid-template-columns: repeat(var(--pdf-columns), 1fr);
    gap: var(--pdf-gap);
    list-style: none;
    margin: 0;
    padding: 0;
}

/* ── Tarjeta ─────────────────────────────────────────────── */
.pdf-gallery-card {
    background: var(--pdf-bg);
    border: 1px solid var(--pdf-border);
    border-radius: var(--pdf-radius);
    box-shadow: var(--pdf-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: box-shadow var(--pdf-transition), transform var(--pdf-transition);
}

.pdf-gallery-card:hover {
    box-shadow: var(--pdf-shadow-hover);
    transform: translateY(-3px);
}

/* ── Área de previsualización ────────────────────────────── */
.pdf-card-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;       /* proporción de página A4 */
    background: #f3f4f6;
    overflow: hidden;
    cursor: pointer;
}

.pdf-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pdf-thumbnail.loaded {
    opacity: 1;
}

/* ── Spinner de carga ────────────────────────────────────── */
.pdf-card-spinner {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f3f4f6;
    transition: opacity 0.3s ease;
}

.pdf-card-spinner.hidden {
    opacity: 0;
    pointer-events: none;
}

.pdf-card-spinner svg {
    width: 40px;
    height: 40px;
    stroke: var(--pdf-accent);
    animation: pdf-spin 0.9s linear infinite;
}

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

/* ── Overlay de acciones (al pasar el ratón) ─────────────── */
.pdf-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--pdf-transition);
}

.pdf-gallery-card:hover .pdf-card-overlay {
    opacity: 1;
}

/* ── Cuerpo de la tarjeta ────────────────────────────────── */
.pdf-card-body {
    padding: 0.875rem 1rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.pdf-card-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--pdf-text);
    margin: 0;
    line-height: 1.35;
    /* truncar a 2 líneas */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-transform: capitalize;
}

.pdf-btn-size {
    font-size: 0.78em;
    font-weight: 400;
    opacity: 0.85;
}

/* ── Botones ─────────────────────────────────────────────── */
.pdf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.45rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: background var(--pdf-transition), color var(--pdf-transition), transform 0.1s;
    white-space: nowrap;
}

.pdf-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.pdf-btn:active {
    transform: scale(0.97);
}

/* Botón "Ver" (en el overlay) */
.pdf-btn-view {
    background: rgba(255, 255, 255, 0.95);
    color: var(--pdf-accent);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.pdf-btn-view:hover {
    background: #ffffff;
    color: var(--pdf-accent-hover);
}

/* Botón "Descargar" */
.pdf-btn-download {
    background: #8f84b9;
    color: #ffffff !important;
    width: 100%;
    margin-top: auto;
}

.pdf-btn-download:hover {
    background: #b0a2cc;    
	color: #ffffff;
}

/* ── Mensajes de estado ──────────────────────────────────── */
.pdf-gallery-error,
.pdf-gallery-empty {
    padding: 1.25rem 1.5rem;
    border-radius: var(--pdf-radius);
    font-size: 0.95rem;
    line-height: 1.6;
}

.pdf-gallery-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.pdf-gallery-empty {
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    color: #0369a1;
}

.pdf-gallery-error code,
.pdf-gallery-empty code {
    font-size: 0.85em;
    background: rgba(0,0,0,0.06);
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

/* ── Menú de pestañas ────────────────────────────────────── */
.pdf-tabs-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 1.75rem;
    border-bottom: 2px solid rgba(196, 184, 220, 0.35);
    width: 80%;
    margin-left: auto;
    margin-right: auto;
}

.pdf-tab-btn {
    padding: 0.65rem 1.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--pdf-muted);
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    border-radius: 6px 6px 0 0;
    transition: color var(--pdf-transition), background var(--pdf-transition), border-color var(--pdf-transition);
    letter-spacing: 0.01em;
}

.pdf-tab-btn:hover {
    color: var(--pdf-accent-hover);
    background: rgba(196, 184, 220, 0.12);
}

.pdf-tab-btn.active {
    color: var(--pdf-accent);
    border-bottom-color: var(--pdf-accent);
}

.pdf-tab-btn:focus-visible {
    outline: 2px solid var(--pdf-accent);
    outline-offset: 2px;
}

.pdf-panel-hidden {
    display: none;
}

/* ── Barra de ordenación ─────────────────────────────────── */
.pdf-gallery-wrapper .pdf-sort-bar {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    scrollbar-width: none;
}

.pdf-gallery-wrapper .pdf-sort-bar::-webkit-scrollbar {
    display: none;
}

/* Botones de tipo de ordenación — color secundario corporativo #c4b8dc */
.pdf-gallery-wrapper .pdf-sort-btn {
    padding: 0.15rem 1rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: #ffffff !important;
    background: rgba(196, 184, 220, 0.35) !important;
    border: 1px solid rgba(196, 184, 220, 0.6) !important;
    border-radius: 999px;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    letter-spacing: 0.01em;
    transition: color var(--pdf-transition), background var(--pdf-transition), border-color var(--pdf-transition);
}

.pdf-gallery-wrapper .pdf-sort-btn:hover {
    color: #ffffff !important;
    background: rgba(196, 184, 220, 0.65) !important;
    border-color: #c4b8dc !important;
}

.pdf-gallery-wrapper .pdf-sort-btn.active {
    color: rgba(255, 255, 255, 0.4) !important;
    background: rgba(196, 184, 220, 0.1) !important;
    border-color: rgba(196, 184, 220, 0.3) !important;
    font-weight: 400;
}

.pdf-gallery-wrapper .pdf-sort-btn:focus-visible {
    outline: 2px solid #c4b8dc;
    outline-offset: 2px;
}

/* Botón de dirección — rojo oscuro, claramente diferenciado */
.pdf-gallery-wrapper .pdf-sort-dir {
    padding: 0.15rem 1rem;
    font-size: 0.78rem;
    font-weight: 700;
    background: #b52828 !important;
    color: #ffffff !important;
    border: none !important;
    border-radius: 999px;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    margin-left: 0.5rem;
    transition: background var(--pdf-transition);
}

.pdf-gallery-wrapper .pdf-sort-dir:hover {
    background: #982020 !important;
}

.pdf-gallery-wrapper .pdf-sort-dir:focus-visible {
    outline: 2px solid #b52828;
    outline-offset: 2px;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1400px) {
    .pdf-gallery-grid {
        grid-template-columns: repeat(min(var(--pdf-columns), 6), 1fr);
    }
}

@media (max-width: 1100px) {
    .pdf-gallery-grid {
        grid-template-columns: repeat(min(var(--pdf-columns), 4), 1fr);
    }
}

@media (max-width: 768px) {
    .pdf-gallery-wrapper > *,
    .pdf-gallery-wrapper > .pdf-gallery-grid {
        width: 92%;
    }

    .pdf-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .pdf-gallery-title {
        font-size: 1.4rem;
    }

    .pdf-gallery-wrapper .pdf-sort-btn,
    .pdf-gallery-wrapper .pdf-sort-dir {
        padding: 0.12rem 0.75rem;
        font-size: 0.72rem;
    }

    .pdf-tabs-nav {
        width: 92%;
    }

    .pdf-tab-btn {
        padding: 0.55rem 1.1rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .pdf-gallery-grid {
        grid-template-columns: 1fr;
    }

    .pdf-gallery-card:hover {
        transform: none;
    }

    .pdf-tab-btn {
        flex: 1 1 auto;
        min-width: 0;
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .pdf-gallery-wrapper .pdf-sort-btn,
    .pdf-gallery-wrapper .pdf-sort-dir {
        padding: 0.1rem 0.6rem;
        font-size: 0.68rem;
    }
}

/* ── Modo oscuro (respeta prefers-color-scheme) ──────────── */
@media (prefers-color-scheme: dark) {
    .pdf-gallery-wrapper {
        --pdf-bg: #1f2937;
        --pdf-border: #374151;
        --pdf-text: #f9fafb;
        --pdf-muted: #9ca3af;
        --pdf-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
        --pdf-shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.55);
    }

    .pdf-card-preview {
        background: #374151;
    }

    .pdf-card-spinner {
        background: #374151;
    }

    .pdf-gallery-wrapper .pdf-sort-dir {
        background: #c0392b !important;
    }

    .pdf-gallery-wrapper .pdf-sort-dir:hover {
        background: #a93226 !important;
    }
}