/* Estilos para el layout principal de la página de colección */

:root {
    --color-primario: #5867dd;
    --color-secundario: #fff;
    --color-terciario: #79829c;
    --color-acento: #34d399;
    --border-radius-main: 8px;
    --shadow-main: 0 8px 16px rgba(0,0,0,.05);
    --text-primary-browse: #2d3748;
    --text-secondary-browse: #4a5568;
    --card-bg-browse: #fff;
    --color-borde: #e2e8f0;
}

main.collection-main-container {
    flex-grow: 1;
    padding: 1.5rem 2.5rem;
    background-color: #f9fafd;
    overflow-x: hidden;
}

#catalog-rows-container, #search-results-container {
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
}

.view-hidden {
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    height: 0; /* Añadir height 0 para colapsar espacio */
    overflow: hidden; /* Asegurar que no ocupe espacio */
}

/* --- ESTILOS DEL CARRUSEL DE LIBROS (REVISADOS) --- */
.row-carousel-wrapper {
    position: relative; /* Necesario para posicionar los botones */
}

.scroll-btn {
    position: absolute;
    top: 50%;
    /* Ajuste para centrar mejor verticalmente con respecto a las tarjetas */
    transform: translateY(-70%); /* Puede requerir ajuste fino */
    background: linear-gradient(135deg, rgba(88, 103, 221, 0.85) 0%, rgba(74, 88, 192, 0.85) 100%);
    backdrop-filter: blur(5px);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    width: 40px; /* Tamaño ligeramente reducido */
    height: 40px;
    font-size: 1.6rem; /* Tamaño de flecha ajustado */
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    opacity: 0; /* Oculto por defecto */
    pointer-events: none; /* No interactivo por defecto */
    transition: opacity 0.3s ease, transform 0.2s ease, background-color 0.2s ease;
}

/* Mostrar botones en hover SOLO si el wrapper tiene la clase 'scrollable' */
.row-carousel-wrapper.scrollable:hover .scroll-btn:not(:disabled) {
    opacity: 1;
    pointer-events: auto;
}

.scroll-btn:hover:not(:disabled) {
    transform: translateY(-70%) scale(1.1); /* Mantener el translateY */
    background: linear-gradient(135deg, rgba(74, 88, 192, 0.95) 0%, rgba(88, 103, 221, 0.95) 100%);
}

.scroll-btn.prev {
    left: 0.5rem; /* Más cerca del borde */
}

.scroll-btn.next {
    right: 0.5rem; /* Más cerca del borde */
}

.scroll-btn:disabled {
    opacity: 0 !important; /* Ocultar completamente si está deshabilitado */
    cursor: default;
    pointer-events: none;
    transform: translateY(-70%); /* Mantener el translateY */
}

.row-inner-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap; /* Mantiene los elementos en una línea */
    /* Padding inferior para que las sombras de las tarjetas no se corten */
    padding: .5rem .25rem 1.5rem .25rem;
    /* Ocultar barra de scroll estándar */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none;  /* IE y Edge */
    scroll-behavior: smooth; /* Desplazamiento suave */
}
.row-inner-scroll::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}
/* --- FIN ESTILOS CARRUSEL --- */


.search-and-filters-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    background-color: var(--color-secundario);
    border-bottom: 1px solid #e2e8f0;
    box-shadow: var(--shadow-main);
    border-radius: var(--border-radius-main);
}

.search-container {
    display: flex;
    gap: .8rem;
    align-items: center;
}

#search-input {
    flex-grow: 1;
    padding: .8rem 1rem;
    font-size: 1rem;
    font-family: 'Nunito', sans-serif;
    border-radius: 6px;
    border: 1px solid #cbd5e1;
    box-shadow: inset 0 1px 2px rgba(0,0,0,.05);
}

#search-input:focus {
    outline: none;
    border-color: var(--color-primario);
    box-shadow: 0 0 0 3px rgba(88,103,221,.2), inset 0 1px 2px rgba(0,0,0,.05);
}

.btn.search-btn {
    padding: .8rem 1.5rem;
    font-size: .95rem;
    background-color: var(--color-primario);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color .2s ease;
}

.btn.search-btn:hover {
    background-color: #4a58c0;
}

.filters-container {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.filter-dropdown {
    padding: .8rem 1rem;
    font-size: .95rem;
    font-family: 'Nunito', sans-serif;
    border-radius: 6px;
    border: 1px solid #cbd5e1;
    background-color: #fff;
    min-width: 200px;
    box-shadow: 0 1px 2px rgba(0,0,0,.03);
}

#collection-content {
    width: 100%;
    padding-top: 1rem;
}

.books-row {
    margin-bottom: 3rem;
    position: relative; /* Asegura contexto para botones absolutos */
}

.row-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.row-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary-browse);
    margin: 0;
}

.all-books-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
    /* Quitar estilos específicos que la hacían diferente si no es necesario */
    /* background-color: #fdfdff; */
    /* padding: 2rem; */
    /* margin: 3rem -2.5rem -1.5rem -2.5rem; */
}


.empty-row-message {
    color: var(--text-secondary-browse);
    font-style: italic;
    padding: 1rem 0;
    text-align: center;
    width: 100%;
}

.offline-alert {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #cc0000;
    color: #fff;
    padding: .8rem 1.5rem;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,.2);
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity .4s ease,visibility .4s ease,bottom .4s ease;
}

.offline-alert.show {
    opacity: 1;
    visibility: visible;
    bottom: 30px;
}

footer { text-align: center; padding: 2rem; font-size: 0.9rem; color: var(--color-terciario); margin-top: auto; }


@media (min-width: 768px) {
    .search-and-filters-section {
        flex-direction: row;
        align-items: center;
    }
}


@media (max-width: 767px) {
    main.collection-main-container {
        padding: 1rem;
    }

    .row-carousel-wrapper {
        margin: 0 -1rem; /* Extender visualmente */
        padding: 0 0.5rem; /* Reducir padding interno para compensar */
    }
    /* Ocultar botones de scroll en móvil explícitamente */
    .scroll-btn {
        display: none !important;
    }

    .search-container {
        flex-direction: column;
        align-items: stretch;
    }
    .filters-container{
        flex-direction:column;
        align-items: stretch;
    }
    .filter-dropdown{
        width:100%;
    }
    .row-title{
        margin-left:0;
        font-size:1.4rem
    }
    .row-inner-scroll{
        padding:.5rem 0 1.5rem 0
    }
    .all-books-section {
        padding: 1.5rem 0;
        margin: 2rem -1rem -1rem -1rem;
    }
}

#infinite-scroll-loader {
    display: none;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary-browse);
    font-weight: 600;
}

#infinite-scroll-loader .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--color-primario);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.skeleton-loader { display: flex; flex-direction: column; gap: 2.5rem; position: relative; overflow: hidden; }
.skeleton-row .skeleton-title { height: 30px; width: 200px; background-color: #e2e8f0; border-radius: 6px; margin-bottom: 1.5rem; }
.skeleton-grid { display: flex; gap: 1.2rem; }
.skeleton-card { width: 170px; height: 255px; background-color: #e2e8f0; border-radius: 8px; flex-shrink: 0; }
.skeleton-title, .skeleton-card { background: linear-gradient(90deg, #e2e8f0 25%, #f0f4f8 50%, #e2e8f0 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Estilos para Resultados de Búsqueda de Autores (sin cambios) */
.search-results-section { margin-bottom: 2rem; }
.search-results-title { font-size: 1.5rem; font-weight: 700; color: var(--text-primary-browse); margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--color-borde); }
.authors-grid-flat { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1.5rem; padding-top: 1rem; }
.author-search-card { background-color: var(--card-bg-browse); border-radius: var(--border-radius-main); padding: 1rem; display: flex; flex-direction: column; align-items: center; text-align: center; box-shadow: var(--shadow-main); transition: transform 0.2s ease, box-shadow 0.2s ease; text-decoration: none; position: relative; }
.author-search-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.08); }
.author-photo-small { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; margin-bottom: 0.75rem; border: 3px solid #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
.author-name { font-weight: 700; color: var(--text-primary-browse); font-size: 1rem; line-height: 1.3; margin-bottom: 0.5rem; }
.author-profile-link { display: flex; align-items: center; justify-content: center; text-decoration: none; color: var(--color-primario); font-weight: 600; font-size: 0.85rem; margin-top: auto; padding-top: 0.5rem; width: 100%; }
.author-profile-link svg { width: 18px; height: 18px; margin-left: 0.25rem; transition: transform 0.2s ease; }
.author-search-card:hover .author-profile-link svg { transform: translateX(3px); }