/* =================================================================
   content/css/contenido-lista.css
   =================================================================
   Estilos para la página pública content/lista.php (el listado de
   tarjetas de cursos/tutoriales/proyectos). Reutiliza las variables
   ya definidas en /assets/css/style.css.
   ================================================================= */

.page-header {
    padding: 40px 0;
    background: var(--primary-dark, #1FCB6B);
    color: #fff;
    text-align: center;
}

.page-header h1 {
    margin-bottom: 6px;
}

/* -----------------------------------------------------------------
   Pestañas de filtro por categoría
   ----------------------------------------------------------------- */
.filtro-categorias {
    display: flex;
    gap: 10px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.filtro-categorias a {
    padding: 8px 18px;
    border-radius: 999px;
    background: var(--light-color, #F4F7F6);
    color: var(--text-color, #1B2330);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--border-soft, #E3E9EC);
    transition: all 0.15s ease;
}

.filtro-categorias a:hover {
    border-color: var(--primary-color, #39FF8E);
}

.filtro-categorias a.activo {
    background: var(--primary-color, #39FF8E);
    color: var(--dark-color, #0B1320);
    border-color: var(--primary-color, #39FF8E);
}

/* -----------------------------------------------------------------
   Cuadrícula de tarjetas de contenido
   ----------------------------------------------------------------- */
.contenido-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 26px;
    margin-bottom: 50px;
}

.contenido-card {
    background: #fff;
    border-radius: var(--border-radius, 10px);
    overflow: hidden;
    box-shadow: var(--shadow, 0 2px 14px rgba(11,19,32,0.08));
    transition: transform 0.18s ease, box-shadow 0.18s ease;
    display: flex;
    flex-direction: column;
}

.contenido-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg, 0 12px 32px rgba(11,19,32,0.16));
}

.contenido-card-imagen {
    height: 150px;
    background: var(--dark-color, #0B1320);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.contenido-card-imagen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contenido-card-icono {
    font-size: 3rem;
}

.contenido-card-body {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.contenido-card-categoria {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--secondary-color, #00C8FF);
    margin-bottom: 6px;
}

.contenido-card-body h3 {
    margin: 0 0 8px;
    font-family: var(--font-display, sans-serif);
}

.contenido-card-body p {
    color: var(--text-light, #5C6B7A);
    font-size: 0.9rem;
    flex: 1;
    margin-bottom: 16px;
}

.btn-ver {
    display: inline-block;
    text-align: center;
    padding: 10px 16px;
    border-radius: 8px;
    background: var(--primary-color, #39FF8E);
    color: var(--dark-color, #0B1320);
    font-weight: 700;
    text-decoration: none;
    transition: background 0.15s ease;
}

.btn-ver:hover {
    background: var(--primary-dark, #1FCB6B);
}

.btn-bloqueado {
    background: var(--light-color, #F4F7F6);
    color: var(--text-color, #1B2330);
    border: 1px solid var(--border-soft, #E3E9EC);
}

.btn-bloqueado:hover {
    background: #E3E9EC;
}

/* -----------------------------------------------------------------
   Estado vacío y avisos de error
   ----------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light, #5C6B7A);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.aviso-error {
    background: rgba(229, 62, 62, 0.08);
    border: 1px solid #E53E3E;
    color: #9B2C2C;
    padding: 14px 18px;
    border-radius: var(--border-radius, 10px);
    margin-bottom: 20px;
}

/* -----------------------------------------------------------------
   Responsive
   ----------------------------------------------------------------- */
@media (max-width: 480px) {
    .contenido-grid {
        grid-template-columns: 1fr;
    }
}