/* ============================================
   COMPONENTE: LAYOUT
   Contenedores y estructuras de página
   
   USO: Todas las vistas deben usar .main-container
   como contenedor principal para mantener consistencia.
   
   Ejemplo:
   <div class="main-container">
       <!-- contenido de la página -->
   </div>
   ============================================ */

/* ===== MAIN CONTAINER (Contenedor estándar para TODAS las vistas) ===== */
.main-container {
    width: calc(100% - 80px);
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 0 2rem;
    min-height: calc(100vh - 100px);
}

/* Variante centrada para formularios/páginas pequeñas */
.main-container.centered {
    max-width: 600px;
}

/* Variante más ancha para tablas con muchas columnas */
.main-container.wide {
    max-width: 1400px;
}

/* ===== MAIN CONTENT (Alias - usar main-container preferiblemente) ===== */
.main-content {
    width: calc(100% - 80px);
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 0 2rem;
    min-height: calc(100vh - 100px);
}

/* ===== PAGE HEADER ===== */
.page-header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.page-header h2,
.page-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: #1a1a2e;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-header h2 i,
.page-header h4 i {
    color: #667eea;
}

/* ===== WELCOME BANNER ===== */
.welcome-banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    color: white;
    margin-bottom: 1.25rem;
}

.welcome-banner h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 0.25rem;
}

.welcome-banner p {
    opacity: 0.9;
    font-size: 0.85rem;
    margin: 0;
}

/* ===== SECTION HEADER ===== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e9ecef;
}

.section-header h5,
.section-header h6 {
    margin: 0;
    font-weight: 600;
    color: #1a1a2e;
}

/* ===== CARD CONTAINER ===== */
.card-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #e9ecef;
    overflow: hidden;
}

.card-container .card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.85rem 1.25rem;
    border-bottom: none;
}

.card-container .card-header h5,
.card-container .card-header h6 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
}

.card-container .card-body {
    padding: 1.25rem;
}

/* ===== GRADIENT HEADER ===== */
.gradient-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    color: white;
    margin-bottom: 1.25rem;
}

.gradient-header h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.gradient-header p {
    opacity: 0.9;
    font-size: 0.85rem;
    margin: 0.25rem 0 0;
}

/* ===== BACK BUTTON ===== */
.back-btn {
    background: rgba(255, 255, 255, 0.95);
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    color: #667eea;
    font-weight: 600;
    font-size: 0.8rem;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.back-btn:hover {
    background: white;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    color: #764ba2;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    .main-container,
    .main-content {
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    .main-container,
    .main-content {
        width: 100%;
        padding: 0.75rem;
    }
    
    .page-header {
        padding: 0.75rem 1rem;
    }
    
    .page-header h2,
    .page-header h4 {
        font-size: 0.9rem;
    }
    
    .welcome-banner,
    .gradient-header {
        padding: 1rem;
    }
}