:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --bg-hover: #252535;
    --accent: #f97316;
    --accent-hover: #ea580c;
    --accent-glow: rgba(249, 115, 22, 0.3);
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b5;
    --text-muted: #6b6b80;
    --border: #2a2a3a;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #eab308;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #fb923c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { color: var(--text-secondary); font-weight: 500; padding: 0.5rem 1rem; border-radius: var(--radius); transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--accent); background: var(--bg-hover); }

.cart-badge {
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    padding: 0.15rem 0.5rem;
    border-radius: 50px;
    margin-left: 0.3rem;
}

/* Flash Messages */
.flash {
    max-width: 1400px;
    margin: 1rem auto;
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 500;
    animation: slideDown 0.3s ease;
}
.flash.success { background: rgba(34, 197, 94, 0.15); border: 1px solid var(--success); color: var(--success); }
.flash.error { background: rgba(239, 68, 68, 0.15); border: 1px solid var(--danger); color: var(--danger); }

@keyframes slideDown { from { transform: translateY(-20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
    padding: 4rem 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}
.hero h1 { font-size: 2.5rem; margin-bottom: 1rem; }
.hero p { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; margin: 0 auto 2rem; }

/* Search & Filter */
.search-bar {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.search-bar input, .search-bar select {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}
.search-bar input:focus, .search-bar select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-bar input { flex: 1; min-width: 200px; }
.search-bar select { min-width: 150px; }

/* Product Grid */
.products-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}
.product-card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: var(--shadow), 0 0 20px var(--accent-glow); }

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 3rem;
}
.product-image img { width: 100%; height: 100%; object-fit: cover; }

.product-info { padding: 1.25rem; }
.product-info h3 { font-size: 1.1rem; margin-bottom: 0.5rem; color: var(--text-primary); }
.product-sku { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 0.5rem; }
.product-aplicacion { color: var(--accent); font-size: 0.9rem; margin-bottom: 0.75rem; }
.product-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.price-container { display: flex; align-items: baseline; gap: 0.75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.price-original { color: var(--text-muted); text-decoration: line-through; font-size: 0.9rem; }
.price-final { color: var(--success); font-size: 1.4rem; font-weight: 700; }
.discount-badge { background: var(--danger); color: white; padding: 0.2rem 0.6rem; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
    font-size: 0.95rem;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); transform: scale(1.02); }
.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border); }
.btn-danger { background: var(--danger); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-warning { background: var(--warning); color: #000; }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
.btn-block { width: 100%; }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

/* Auth Pages */
.auth-container {
    min-height: calc(100vh - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}
.auth-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow);
}
.auth-box h2 { text-align: center; margin-bottom: 2rem; font-size: 1.8rem; }

/* Tables */
.table-container { overflow-x: auto; background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 1rem; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg-hover); color: var(--text-secondary); font-weight: 600; text-transform: uppercase; font-size: 0.85rem; }
tr:hover td { background: var(--bg-hover); }

/* Status badges */
.badge { padding: 0.3rem 0.8rem; border-radius: 50px; font-size: 0.8rem; font-weight: 600; }
.badge-pending { background: rgba(234, 179, 8, 0.2); color: var(--warning); }
.badge-approved { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge-sent { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.badge-delivered { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge-cancelled { background: rgba(239, 68, 68, 0.2); color: var(--danger); }

/* Admin layout */
.admin-grid { display: grid; grid-template-columns: 250px 1fr; min-height: calc(100vh - 60px); }
.admin-sidebar { background: var(--bg-secondary); border-right: 1px solid var(--border); padding: 1.5rem; }
.admin-sidebar a { display: block; padding: 0.75rem 1rem; margin-bottom: 0.5rem; border-radius: var(--radius); color: var(--text-secondary); transition: var(--transition); }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--accent); color: white; }
.admin-content { padding: 2rem; }
.admin-content h2 { margin-bottom: 1.5rem; font-size: 1.5rem; }

/* Cart */
.cart-item { display: flex; align-items: center; gap: 1rem; padding: 1rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 1rem; }
.cart-item img { width: 80px; height: 80px; object-fit: cover; border-radius: 8px; }
.cart-item-info { flex: 1; }
.cart-item-qty { display: flex; align-items: center; gap: 0.5rem; }
.cart-item-qty input { width: 60px; text-align: center; }
.cart-summary { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }

/* Modal */
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.7); z-index: 2000; align-items: center; justify-content: center; }
.modal.active { display: flex; }
.modal-content { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius); padding: 2rem; max-width: 600px; width: 90%; max-height: 90vh; overflow-y: auto; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 1.5rem; cursor: pointer; }

/* Tabs */
.tabs { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.tab { padding: 0.5rem 1rem; border-radius: var(--radius) var(--radius) 0 0; cursor: pointer; color: var(--text-secondary); transition: var(--transition); }
.tab:hover, .tab.active { color: var(--accent); background: var(--bg-hover); }

/* ==================== RESPONSIVE ADMIN (MÓVIL) ==================== */
@media (max-width: 768px) {
    /* Forzar grid a 1 columna */
    .admin-grid { 
        grid-template-columns: 1fr !important; 
        display: block !important;
    }
    
    /* Sidebar horizontal compacto */
    .admin-sidebar {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        overflow-y: hidden !important;
        padding: 6px 8px !important;
        margin: 0 0 1rem 0 !important;
        gap: 6px !important;
        align-items: center !important; /* 🔑 Clave: evita que estire los botones */
        justify-content: flex-start !important;
        height: auto !important;
        min-height: auto !important;
        max-height: 42px !important; /* 🔑 Tope estricto */
        line-height: 1 !important;
        border-right: none !important;
        border-bottom: 1px solid var(--border) !important;
        background: var(--bg-secondary) !important;
        scrollbar-width: thin;
        scrollbar-color: var(--accent) transparent;
    }

    /* Botones del menú */
    .admin-sidebar a {
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        height: 34px !important; /* 🔑 Altura fija estricta */
        padding: 0 12px !important;
        margin: 0 !important;
        font-size: 0.82rem !important;
        line-height: 1 !important;
        white-space: nowrap !important;
        flex: 0 0 auto !important; /* No crece, no encoge */
        box-sizing: border-box !important;
        border-radius: 6px !important;
        text-decoration: none !important;
        transition: all 0.2s ease !important;
        color: var(--text-secondary) !important;
    }

    /* Estado activo */
    .admin-sidebar a:hover,
    .admin-sidebar a.active { 
        background: var(--accent) !important; 
        color: #ffffff !important;
        transform: none !important;
        box-shadow: none !important;
    }

    /* Contenido principal */
    .admin-content { 
        padding: 0.5rem 0 !important; 
        width: 100% !important;
        overflow-x: hidden !important;
    }
    
    .admin-content h2 { 
        font-size: 1.2rem !important; 
        margin: 0.5rem 1rem 0.75rem 1rem !important; 
        padding-left: 0.5rem !important;
    }

    /* Tablas y contenedores en móvil */
    .table-container { 
        overflow-x: auto !important; 
        width: 100% !important;
        border-radius: 0 !important;
    }
    
    table { 
        min-width: 600px !important; /* Fuerza scroll horizontal en tablas */
    }
}

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.fade-in { animation: fadeIn 0.3s ease; }

/* PWA Install Banner */
.install-banner { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--bg-card); border: 1px solid var(--accent); border-radius: var(--radius); padding: 1rem 1.5rem; display: flex; align-items: center; gap: 1rem; z-index: 3000; box-shadow: var(--shadow); }
.install-banner.hidden { display: none; }

/* ==================== ESTILOS PARA IMPRESIÓN ==================== */
@media print {
    /* Reset general */
    * { 
        box-shadow: none !important; 
        text-shadow: none !important; 
        background: transparent !important; 
        color: #000 !important;
    }
    
    body {
        background: #fff !important;
        font-size: 11pt;
        line-height: 1.4;
    }
    
    /* Ocultar elementos no necesarios */
    .navbar, .footer, .no-print, button, [onclick], .flash, .install-banner {
        display: none !important;
    }
    
    /* Ajustar contenedores */
    .modal-content, .admin-content, .auth-box {
        max-width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
        border: none !important;
        background: #fff !important;
    }
    
    /* Tablas imprimibles */
    table { 
        width: 100%; 
        border-collapse: collapse; 
        font-size: 10pt;
    }
    th, td { 
        border: 1px solid #000 !important; 
        padding: 6px 8px !important; 
    }
    th { 
        background: #f0f0f0 !important; 
        font-weight: bold; 
    }
    
    /* Precios y totales */
    .price-final, .total-final { 
        font-weight: bold !important; 
        font-size: 12pt !important;
    }
    
    /* Badge de estado para impresión */
    .badge { 
        border: 1px solid #000 !important; 
        padding: 2px 8px !important; 
        border-radius: 4px !important;
    }
    
    /* Saltos de página */
    .page-break { 
        page-break-after: always; 
    }
    
    /* Encabezado de impresión */
    .print-header {
        display: block !important;
        text-align: center;
        margin-bottom: 20px;
        border-bottom: 2px solid #000;
        padding-bottom: 15px;
    }
}

/* Clase para mostrar solo en impresión */
.print-only { 
    display: none; 
}
@media print { 
    .print-only { 
        display: block !important; 
    }
    .no-print { 
        display: none !important; 
    }
}

/* Tabs de configuración */
.tabs { display: flex; gap: 0.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0; margin-bottom: 1.5rem; }
.tab { padding: 0.75rem 1.25rem; border-radius: var(--radius) var(--radius) 0 0; cursor: pointer; color: var(--text-secondary); transition: var(--transition); font-weight: 500; border: 1px solid transparent; border-bottom: none; }
.tab:hover { color: var(--accent); background: var(--bg-hover); }
.tab.active { color: var(--accent); background: var(--bg-card); border-color: var(--border); border-bottom-color: var(--bg-card); font-weight: 600; }
.tab-content { animation: fadeIn 0.2s ease; }

/* Responsive para settings */
@media (max-width: 768px) {
    .tabs { overflow-x: auto; padding-bottom: 0.5rem; }
    .tab { flex-shrink: 0; }
}