/* 
 * THC Gestión Blog - Sistema de Imágenes Placeholder
 * Genera imágenes placeholder elegantes hasta que se suban las imágenes reales
 */

/* Contenedor base para placeholders */
.blog-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0066ff 0%, #8b5cf6 100%);
    color: white;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Efecto de grid en el fondo */
.blog-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') repeat;
    opacity: 0.3;
}

/* Contenido del placeholder */
.blog-placeholder-content {
    position: relative;
    z-index: 2;
    padding: 20px;
}

/* Icono del placeholder */
.blog-placeholder-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.9;
}

/* Texto del placeholder */
.blog-placeholder-text {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    opacity: 0.95;
}

/* Subtítulo del placeholder */
.blog-placeholder-subtitle {
    font-size: 14px;
    opacity: 0.7;
    font-weight: 400;
}

/* Tamaños específicos */
.blog-placeholder-hero {
    width: 100%;
    height: 400px;
}

.blog-placeholder-card {
    width: 100%;
    height: 200px;
}

.blog-placeholder-small {
    width: 100%;
    height: 120px;
}

.blog-placeholder-small .blog-placeholder-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.blog-placeholder-small .blog-placeholder-text {
    font-size: 14px;
    margin-bottom: 4px;
}

.blog-placeholder-small .blog-placeholder-subtitle {
    font-size: 12px;
}

/* Diferentes variantes de color para diferentes categorías */
.blog-placeholder.ofertas {
    background: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
    color: #000;
}

.blog-placeholder.guias {
    background: linear-gradient(135deg, #0066ff 0%, #0052cc 100%);
}

.blog-placeholder.funcionalidades {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: #000;
}

.blog-placeholder.casos-exito {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.blog-placeholder.legal {
    background: linear-gradient(135deg, #84cc16 0%, #65a30d 100%);
    color: #000;
}

.blog-placeholder.tutoriales {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

/* Efecto hover */
.blog-placeholder:hover {
    transform: scale(1.02);
    transition: transform 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .blog-placeholder-hero {
        height: 250px;
    }
    
    .blog-placeholder-card {
        height: 180px;
    }
    
    .blog-placeholder-icon {
        font-size: 36px;
    }
    
    .blog-placeholder-text {
        font-size: 16px;
    }
}

/* Clase para ocultar placeholders cuando se cargan imágenes reales */
.blog-placeholder.loaded {
    display: none;
}

/* Efecto de carga simulado */
.blog-placeholder.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255,255,255,0.2), 
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}