/* Sidebar colapsado - ocultar submenús */
.sidebar.collapsed .submenu {
    display: none;
}

.sidebar.collapsed .nav-link.has-submenu .submenu-toggle {
    display: none;
}

/* Animación de colapso suave */
.submenu.collapsing,
.submenu.collapse.show {
    transition: height 0.3s ease;
}

/* Responsive - Mobile */
@media (max-width: 768px) {
    .submenu .nav-link {
        padding: 8px 15px 8px 35px;
        font-size: 0.85rem;
    }
    
    .submenu .nav-link:before {
        left: 25px;
        font-size: 1rem;
    }
}

/* ============================================================================
   SUBMENU STYLES COMPLETO - MENÚS DESPLEGABLES AVANZADOS
   ============================================================================ */

.nav-item {
    margin-bottom: 3px;
}

.nav-link {
    transition: all 0.3s ease;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s;
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link.has-submenu {
    padding-right: 45px;
}

.nav-link.has-submenu .submenu-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.3s ease;
    font-size: 0.75rem;
    opacity: 0.8;
    pointer-events: none;
}

.nav-link.has-submenu.collapsed .submenu-toggle {
    transform: translateY(-50%) rotate(-90deg);
}

.nav-link.has-submenu:not(.collapsed) .submenu-toggle {
    transform: translateY(-50%) rotate(0deg);
    opacity: 1;
}

.submenu {
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    margin: 5px 0 8px 0;
    padding: 8px 0;
    backdrop-filter: blur(10px);
    border-left: 3px solid rgba(255,255,255,0.2);
}

.submenu .nav-link {
    padding: 8px 15px 8px 40px;
    font-size: 0.85rem;
    margin-bottom: 2px;
    border-radius: 6px;
    position: relative;
    font-weight: 500;
}

.submenu .nav-link:before {
    content: "▸";
    position: absolute;
    left: 25px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.6;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.submenu .nav-link:hover {
    background: rgba(255,255,255,0.15);
    padding-left: 42px;
}

.submenu .nav-link:hover:before {
    opacity: 1;
    left: 27px;
    color: #fff;
}

.submenu .nav-link.active {
    background: rgba(255,255,255,0.25);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    border-left: 3px solid rgba(255,255,255,0.5);
}

.submenu .nav-link.active:before {
    content: "▶";
    opacity: 1;
    color: #fff;
    font-weight: bold;
}

/* Sidebar colapsado */
.sidebar.collapsed .submenu {
    display: none !important;
}

.sidebar.collapsed .nav-link.has-submenu .submenu-toggle {
    display: none;
}

.sidebar.collapsed .nav-link.has-submenu {
    padding-right: 25px;
}

/* Animaciones mejoradas */
.submenu.collapsing {
    transition: height 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.submenu.collapse.show {
    animation: slideIn 0.35s ease-out;
}

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

/* Indicadores de cantidad en submenús */
.submenu-badge {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    color: white;
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* Responsive mejorado */
@media (max-width: 768px) {
    .nav-link.has-submenu {
        padding-right: 40px;
    }
    
    .submenu .nav-link {
        padding: 10px 12px 10px 35px;
        font-size: 0.9rem;
    }
    
    .submenu .nav-link:before {
        left: 20px;
        font-size: 0.8rem;
    }
    
    .submenu .nav-link:hover {
        padding-left: 37px;
    }
    
    .submenu .nav-link:hover:before {
        left: 22px;
    }
}

/* Efectos de hover en menú principal */
.nav-link:not(.has-submenu):hover {
    transform: translateX(5px);
    box-shadow: 0 3px 12px rgba(0,0,0,0.15);
}

.sidebar.collapsed .nav-link:hover {
    transform: none;
}

/* Estados especiales */
.nav-link.active:not(.has-submenu) {
    background: rgba(255,255,255,0.2);
    box-shadow: 0 3px 12px rgba(0,0,0,0.2);
    border-left: 4px solid rgba(255,255,255,0.8);
}