:root {
            --azul-principal: #0A66C2;
            --azul-secundario: #1E90FF;
            --negro: #111111;
            --gris-borde: #E0E0E0;
            --gris-fondo: #F5F5F5;
            --blanco: #FFFFFF;
            --gris-medio: #B0B0B0;
            --gris-oscuro: #C0C0C0;
            --gris-texto: #666666;
            --sombra-suave: 0 4px 20px rgba(0, 0, 0, 0.08);
            --transicion: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--gris-fondo);
            color: var(--negro);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        /* ========== BORDES RECTOS GLOBAL ========== */
        .btn,
        .form-control,
        .dropdown-menu,
        .card,
        .input-group,
        .navbar,
        .nav-link,
        .mega-menu,
        .badge {
            border-radius: 0 !important;
        }

        /* ========== TOP BAR (oculta en móvil) ========== */
        .top-bar {
            background-color: var(--negro);
            color: var(--blanco);
            font-size: 0.8rem;
            padding: 6px 0;
            letter-spacing: 0.4px;
        }
        .top-bar a {
            color: var(--gris-oscuro);
            text-decoration: none;
            transition: var(--transicion);
            font-size: 0.8rem;
        }
        .top-bar a:hover {
            color: var(--blanco);
        }
        .top-bar .bi {
            font-size: 0.9rem;
            margin-right: 3px;
            color: var(--azul-secundario);
        }

        /* ========== NAVBAR PRINCIPAL ========== */
        .navbar-principal {
            background-color: var(--blanco);
            padding: 0;
            box-shadow: var(--sombra-suave);
            min-height: 72px;
            z-index: 1030;
            position: relative;
        }

        /* Logo */
        .navbar-brand-custom {
            display: flex;
            align-items: center;
            text-decoration: none;
            gap: 10px;
            flex-shrink: 0;
        }
        .navbar-brand-custom .logo-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--azul-principal) 0%, var(--azul-secundario) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--blanco);
            letter-spacing: -1px;
        }
        .navbar-brand-custom .logo-text {
            line-height: 1.15;
        }
        .navbar-brand-custom .logo-text .brand-name {
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--negro);
            letter-spacing: 0.5px;
            display: block;
        }
        .navbar-brand-custom .logo-text .brand-sub {
            font-size: 0.6rem;
            color: var(--gris-texto);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-weight: 600;
        }

        /* Buscador */
        .search-form {
            flex: 1;
            max-width: 520px;
            margin: 0 auto;
        }
        .search-form .input-group {
            border: 2px solid var(--gris-borde);
            background: var(--gris-fondo);
            transition: var(--transicion);
        }
        .search-form .input-group:focus-within {
            border-color: var(--azul-principal);
            box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.08);
        }
        .search-form .form-control {
            border: none;
            background: transparent;
            padding: 10px 16px;
            font-size: 0.9rem;
            color: var(--negro);
            box-shadow: none;
        }
        .search-form .form-control::placeholder {
            color: var(--gris-medio);
            font-weight: 400;
        }
        .search-form .btn-search {
            background: transparent;
            border: none;
            color: var(--azul-principal);
            padding: 10px 16px;
            font-size: 1.15rem;
            transition: var(--transicion);
        }
        .search-form .btn-search:hover {
            color: var(--azul-secundario);
            background: rgba(10, 102, 194, 0.04);
        }

        /* Iconos derecha */
        .nav-icons .icon-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            color: var(--negro);
            text-decoration: none;
            transition: var(--transicion);
            font-size: 1.35rem;
        }
        .nav-icons .icon-link:hover {
            color: var(--azul-principal);
            background: var(--gris-fondo);
        }
        .nav-icons .cart-badge {
            position: absolute;
            top: 4px;
            right: 2px;
            background: var(--azul-principal);
            color: var(--blanco);
            font-size: 0.65rem;
            font-weight: 700;
            min-width: 18px;
            height: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 4px;
            border: 2px solid var(--blanco);
        }

        /* ========== BARRA CATEGORÍAS / PRODUCTOS (oculta en móvil) ========== */
        .barra-categorias {
            background-color: var(--blanco);
            border-top: 1px solid var(--gris-borde);
            border-bottom: 2px solid var(--gris-borde);
        }
        .barra-categorias .btn-cat {
            background: transparent;
            border: none;
            padding: 12px 24px;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--negro);
            text-transform: uppercase;
            letter-spacing: 0.6px;
            transition: var(--transicion);
            cursor: pointer;
            position: relative;
        }
        .barra-categorias .btn-cat:hover,
        .barra-categorias .btn-cat.active {
            color: var(--azul-principal);
        }
        .barra-categorias .btn-cat i {
            margin-left: 5px;
            font-size: 0.75rem;
            transition: var(--transicion);
        }
        .barra-categorias .btn-cat:hover i {
            transform: rotate(180deg);
        }

        /* ========== MEGA MENÚ 4 COLUMNAS ========== */
        .mega-menu-container {
            position: absolute;
            left: 0;
            right: 0;
            top: 100%;
            z-index: 1020;
            background: var(--blanco);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.13);
            border-top: 3px solid var(--azul-principal);
            display: none;
        }
        .mega-menu-container.show {
            display: block;
        }
        .mega-menu-inner {
            padding: 28px 32px;
        }
        .mega-col-title {
            font-weight: 700;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            color: var(--azul-principal);
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--gris-borde);
        }
        .mega-menu-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mega-menu-list li {
            margin-bottom: 6px;
        }
        .mega-menu-list li a {
            display: block;
            padding: 7px 0;
            color: var(--gris-texto);
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transicion);
            border-left: 2px solid transparent;
            padding-left: 8px;
        }
        .mega-menu-list li a:hover {
            color: var(--azul-principal);
            border-left-color: var(--azul-principal);
            background: var(--gris-fondo);
            padding-left: 14px;
        }
        .mega-menu-list li a .badge-nuevo {
            background: var(--azul-secundario);
            color: var(--blanco);
            font-size: 0.6rem;
            padding: 2px 6px;
            margin-left: 5px;
            font-weight: 700;
            text-transform: uppercase;
            vertical-align: middle;
        }
        .mega-menu-list li a .badge-oferta {
            background: #dc3545;
            color: var(--blanco);
            font-size: 0.6rem;
            padding: 2px 6px;
            margin-left: 5px;
            font-weight: 700;
            text-transform: uppercase;
            vertical-align: middle;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 991.98px) {
            /* Móvil: logo al centro */
            .navbar-principal .container {
                position: relative;
                flex-wrap: nowrap;
            }
            .navbar-principal .navbar-toggler {
                order: 1;
                margin-right: 0;
                border: none;
                padding: 8px 4px;
                color: var(--negro);
                font-size: 1.5rem;
            }
            .navbar-principal .navbar-brand-custom {
                order: 2;
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .navbar-principal .search-form {
                order: 3;
                display: none;
                /* El buscador se oculta en móvil, se puede mostrar en el offcanvas */
            }
            .navbar-principal .nav-icons {
                order: 4;
                margin-left: auto;
                display: flex;
                gap: 2px;
            }
            /* Ocultar barra de categorías */
            .barra-categorias {
                display: none !important;
            }
            /* Logo más pequeño */
            .navbar-brand-custom .logo-icon {
                width: 38px;
                height: 38px;
                font-size: 1.1rem;
            }
            .navbar-brand-custom .logo-text .brand-name {
                font-size: 1.1rem;
            }
            .navbar-brand-custom .logo-text .brand-sub {
                font-size: 0.55rem;
            }
            .navbar-principal {
                min-height: 60px;
            }
            /* Offcanvas */
            .offcanvas {
                border-radius: 0 !important;
            }
            .offcanvas-header {
                background: var(--negro);
                color: var(--blanco);
                border-radius: 0 !important;
            }
            .offcanvas-header .btn-close {
                filter: invert(1);
            }
            .offcanvas-body {
                padding: 0;
            }
            .offcanvas-body .mobile-nav-link {
                display: block;
                padding: 14px 20px;
                border-bottom: 1px solid var(--gris-borde);
                color: var(--negro);
                text-decoration: none;
                font-weight: 600;
                font-size: 0.95rem;
                transition: var(--transicion);
            }
            .offcanvas-body .mobile-nav-link:hover {
                background: var(--gris-fondo);
                color: var(--azul-principal);
            }
            .offcanvas-body .mobile-nav-link i {
                margin-right: 10px;
                color: var(--azul-principal);
            }
            /* Buscador móvil dentro del offcanvas */
            .mobile-search {
                padding: 12px 16px;
                background: var(--gris-fondo);
                border-bottom: 1px solid var(--gris-borde);
            }
            .mobile-search .input-group {
                border: 1px solid var(--gris-borde);
                background: var(--blanco);
            }
            .mobile-search .form-control {
                border: none;
            }
            .mobile-search .btn {
                border: none;
                background: var(--azul-principal);
                color: var(--blanco);
            }
            /* Categorías en offcanvas como acordeón */
            .accordion-cat .accordion-button {
                font-weight: 600;
                font-size: 0.9rem;
                padding: 12px 20px;
                box-shadow: none;
                border-bottom: 1px solid var(--gris-borde);
                background: var(--blanco);
            }
            .accordion-cat .accordion-button:not(.collapsed) {
                background: var(--gris-fondo);
                color: var(--azul-principal);
            }
            .accordion-cat .accordion-body {
                padding: 0;
                background: var(--gris-fondo);
            }
            .accordion-cat .accordion-body a {
                display: block;
                padding: 10px 28px;
                font-size: 0.85rem;
                color: var(--gris-texto);
                text-decoration: none;
                border-bottom: 1px solid var(--gris-borde);
                transition: var(--transicion);
            }
            .accordion-cat .accordion-body a:hover {
                color: var(--azul-principal);
                background: var(--blanco);
                padding-left: 34px;
            }
        }

        @media (min-width: 992px) {
            .navbar-toggler {
                display: none;
            }
            .offcanvas {
                display: none !important;
            }
            .navbar-principal .container {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 16px;
            }
            .nav-icons {
                display: flex;
                align-items: center;
                gap: 8px;
                flex-shrink: 0;
            }
        }

        /* Animaciones */
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .mega-menu-container.show {
            animation: fadeInDown 0.2s ease forwards;
        }

        /* Ocultar mega menú en móvil */
        @media (max-width: 991.98px) {
            .mega-menu-container {
                display: none !important;
            }
        }