/* ============================================================
   search-articles.css
   Estilos para búsqueda, filtros y paginación AJAX
============================================================ */

/* Input de búsqueda */
.search-input {
    width: 100%;
    padding: 14px 18px;
    font-size: 1rem;
    border: 2px solid #ede9f5;
    border-radius: 8px;
    background: #fafafa;
    color: #1a0e35;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s ease;
    margin-bottom: 20px;
}

.search-input:focus {
    outline: none;
    border-color: #7c3aed;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.08);
}

.search-input::placeholder {
    color: #b0a0c8;
}

/* Filtros avanzados */
.advanced-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 0;
}

.advanced-filters label {
    font-size: 0.95rem;
    color: #5a4d72;
    cursor: pointer;
    font-weight: 500;
    transition: color 0.2s ease;
    user-select: none;
}

.advanced-filters label:hover {
    color: #7c3aed;
}

.advanced-filters input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #7c3aed;
}

/* Spinner de carga */
#loading-spinner {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px 20px;
    font-size: 1.1rem;
    color: #7c3aed;
    display: none;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Botón "Cargar más" */
#load-more-btn {
    grid-column: 1 / -1;
    padding: 14px 28px;
    margin: 40px auto;
    font-size: 1rem;
    font-weight: 600;
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    display: none;
}

#load-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
}

#load-more-btn:active {
    transform: translateY(0);
}

/* Estado deshabilitado */
#load-more-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Mensaje vacío */
.listing-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: #5a4d72;
}

.listing-empty p {
    margin: 10px 0;
    font-size: 1.05rem;
}

/* Indicador de caché */
.cache-indicator {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 0.75rem;
    color: #999;
    padding: 8px 0;
    margin-bottom: 10px;
    font-style: italic;
}

/* Responsive: Mobile */
@media (max-width: 768px) {
    .search-input {
        padding: 12px 14px;
        font-size: 0.95rem;
    }

    .advanced-filters {
        gap: 8px;
    }

    .advanced-filters label {
        font-size: 0.85rem;
    }

    .advanced-filters input[type="checkbox"] {
        width: 16px;
        height: 16px;
    }

    #load-more-btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }
}

/* Responsive: Tablet */
@media (max-width: 1024px) {
    .search-input {
        padding: 13px 16px;
    }
}

/* Accesibilidad: Focus visible */
.search-input:focus-visible,
#load-more-btn:focus-visible {
    outline: 2px solid #7c3aed;
    outline-offset: 2px;
}

/* Animación de entrada para tarjetas */
.blog-card {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Skeleton loader (opcional para mejorar UX) */
.blog-card.skeleton {
    background: linear-gradient(90deg, #f0eaf8 0%, #fafafa 50%, #f0eaf8 100%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Dark mode (si se implementa) */
@media (prefers-color-scheme: dark) {
    .search-input {
        background: #1a1a2e;
        color: #fff;
        border-color: #3a3a5a;
    }

    .search-input:focus {
        background: #252540;
        border-color: #8d5aff;
    }

    .search-input::placeholder {
        color: #8a7aa8;
    }

    .advanced-filters label {
        color: #b0a0c8;
    }

    .advanced-filters label:hover {
        color: #8d5aff;
    }

    #load-more-btn {
        background: linear-gradient(135deg, #8d5aff 0%, #7d4ae5 100%);
        box-shadow: 0 4px 12px rgba(141, 90, 255, 0.3);
    }

    #load-more-btn:hover {
        box-shadow: 0 6px 16px rgba(141, 90, 255, 0.4);
    }
}