:root {
    /* Paleta oficial de BZ Ingeniería */
    --bz-navy-dark: #0e1a2b;
    --bz-navy-header: #1e3a5f;
    --bz-navy-panel: #172a45;
    --bz-navy-border: #2c4d75;
    --bz-accent: #3182ce;
    --bz-accent-hover: #2b6cb0;
    --bz-gold: #d69e2e;
    --bz-success: #2f855a;
    --bz-success-hover: #276749;
    --bz-danger: #e53e3e;
    --bz-danger-hover: #c53030;
    --text-main: #f7fafc;
    --text-muted: #a0aec0;
    --card-bg: #1e3656;
    --input-bg: #0b1524;
}

body.theme-light {
    --bz-navy-dark: #f0f4f8;
    --bz-navy-header: #1e3a5f;
    --bz-navy-panel: #ffffff;
    --bz-navy-border: #cbd5e0;
    --bz-accent: #2b6cb0;
    --bz-accent-hover: #1c4ed8;
    --bz-gold: #d69e2e;
    --bz-success: #2f855a;
    --bz-danger: #e53e3e;
    --text-main: #1a202c;
    --text-muted: #4a5568;
    --card-bg: #ffffff;
    --input-bg: #f8fafc;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', system-ui, sans-serif; }

/* Corrección: 100dvh para compatibilidad móvil y evitar advertencias */
body { 
    background: var(--bz-navy-dark); 
    color: var(--text-main); 
    height: 100vh; 
    height: 100dvh; 
    display: flex; 
    flex-direction: column; 
    overflow: hidden; 
    transition: background 0.25s, color 0.25s; 
}

header.pos-header {
    background: var(--bz-navy-header);
    border-bottom: 2px solid var(--bz-navy-border);
    padding: 0.65rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
    flex-shrink: 0;
}

.brand-title { display: flex; align-items: center; gap: 0.75rem; font-weight: 800; font-size: 1.3rem; color: white; text-decoration: none; }
.brand-title img { width: 38px; height: 38px; border-radius: 6px; object-fit: contain; background: white; padding: 2px; }
.brand-title span { color: #63b3ed; font-weight: 900; }

.pos-tabs { display: flex; gap: 0.4rem; }
.tab-btn {
    background: rgba(255,255,255,0.08);
    color: #cbd5e0;
    border: 1px solid transparent;
    padding: 0.55rem 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.88rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.tab-btn:hover, .tab-btn.active {
    background: var(--bz-accent);
    color: white;
    border-color: #63b3ed;
    box-shadow: 0 2px 8px rgba(49, 130, 206, 0.4);
}

.user-status { display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; color: white; }
.shift-badge { padding: 0.3rem 0.8rem; border-radius: 50px; font-weight: 700; font-size: 0.8rem; }
.shift-open { background: rgba(47, 133, 90, 0.25); color: #68d391; border: 1px solid var(--bz-success); }
.shift-closed { background: rgba(229, 62, 62, 0.25); color: #fc8181; border: 1px solid var(--bz-danger); }
.sync-badge { background: rgba(49, 130, 206, 0.25); color: #63b3ed; border: 1px solid var(--bz-accent); padding: 0.3rem 0.8rem; border-radius: 50px; font-weight: 700; font-size: 0.8rem; }

.panic-btn {
    background: var(--bz-danger);
    color: white;
    border: 0; /* Corrección: border 0 en lugar de none */
    padding: 0.5rem 0.9rem;
    border-radius: 8px;
    font-weight: 800;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    animation: pulse 2s infinite;
}
.panic-btn:hover { background: var(--bz-danger-hover); }

@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(229, 62, 62, 0.7); } 70% { box-shadow: 0 0 0 10px rgba(229, 62, 62, 0); } 100% { box-shadow: 0 0 0 0 rgba(229, 62, 62, 0); } }

.theme-toggle-btn {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
}

main.pos-main { flex: 1; display: flex; overflow: hidden; min-height: 0; }
.tab-content { display: none; width: 100%; height: 100%; }
.tab-content.active { display: flex; width: 100%; height: 100%; }

.pos-grid, #tab-venta.active { display: grid; grid-template-columns: 1fr 380px; width: 100%; height: 100%; }
.products-section, .catalog-section { padding: 1.25rem; display: flex; flex-direction: column; gap: 1rem; overflow-y: auto; border-right: 1px solid var(--bz-navy-border); background: var(--bz-navy-dark); flex: 1; height: 100%; }

.search-bar { display: flex; gap: 0.75rem; }

/* Corrección: Outline transparente para accesibilidad */
.search-bar input, .search-input {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--bz-navy-border);
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    outline: 2px solid transparent;
    outline-offset: 2px;
}
.search-bar input:focus, .search-input:focus { border-color: var(--bz-accent); }

.shortcuts-bar { display: flex; gap: 0.6rem; font-size: 0.78rem; color: var(--text-muted); background: var(--bz-navy-panel); padding: 0.4rem 0.8rem; border-radius: 6px; border: 1px solid var(--bz-navy-border); }
.kbd { background: rgba(255,255,255,0.15); color: white; padding: 0.1rem 0.4rem; border-radius: 4px; font-weight: 700; font-family: monospace; }

.filter-pills { display: flex; gap: 0.5rem; margin-top: 0.5rem; flex-wrap: wrap; }
.pill-btn { background: var(--bz-navy-panel); border: 1px solid var(--bz-navy-border); color: var(--text-muted); padding: 0.35rem 0.8rem; border-radius: 20px; font-size: 0.8rem; cursor: pointer; font-weight: 600; }
.pill-btn.active, .pill-btn:hover { background: var(--bz-accent); color: white; border-color: #63b3ed; }

.products-grid, .products-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; overflow-y: auto; padding: 0.5rem 0 2rem 0; }
.product-card {
    background: var(--card-bg);
    border: 1px solid var(--bz-navy-border);
    border-radius: 10px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 140px;
}
.product-card:hover { transform: translateY(-3px); border-color: #63b3ed; }
.product-card h4 { font-size: 0.92rem; color: var(--text-main); margin-bottom: 0.5rem; line-height: 1.3; font-weight: 700; }
.product-card .price { font-size: 1.15rem; font-weight: 900; color: #63b3ed; }
.product-card .stock { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.4rem; }

.cart-section { background: var(--bz-navy-panel); padding: 1.25rem; display: flex; flex-direction: column; justify-content: space-between; border-left: 1px solid var(--bz-navy-border); overflow: hidden; height: 100%; }
.cart-header { font-size: 1rem; font-weight: 800; border-bottom: 2px solid var(--bz-navy-border); padding-bottom: 0.75rem; display: flex; justify-content: space-between; align-items: center; color: white; }

.cart-list, .cart-items { flex: 1; overflow-y: auto; margin: 1rem 0; display: flex; flex-direction: column; gap: 0.6rem; }
.cart-item {
    background: var(--bz-navy-dark);
    padding: 0.75rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    border: 1px solid var(--bz-navy-border);
}
.cart-item-title { font-weight: 700; font-size: 0.88rem; max-width: 150px; }
.cart-item-controls { display: flex; align-items: center; gap: 0.5rem; }
.qty-btn { background: var(--bz-navy-border); border: 0; color: white; width: 26px; height: 26px; border-radius: 4px; font-weight: bold; cursor: pointer; }

.cart-summary { background: var(--input-bg); padding: 1.25rem; border-radius: 10px; border: 1px solid var(--bz-navy-border); }
.summary-row { display: flex; justify-content: space-between; margin-bottom: 0.4rem; font-size: 0.95rem; color: var(--text-muted); }
.summary-total, .total-row { font-size: 1.4rem; font-weight: 900; color: #68d391; border-top: 1px solid var(--bz-navy-border); padding-top: 0.6rem; margin-top: 0.4rem; }

.quick-discount-bar { display: flex; gap: 0.4rem; margin-top: 0.6rem; }
.disc-btn { flex: 1; background: rgba(255,255,255,0.08); border: 1px solid var(--bz-navy-border); color: var(--text-muted); padding: 0.3rem; border-radius: 4px; font-size: 0.75rem; cursor: pointer; font-weight: bold; }
.disc-btn:hover { background: var(--bz-gold); color: black; }

.btn-primary { background: var(--bz-accent); color: white; border: 0; padding: 0.65rem 1.2rem; border-radius: 8px; font-weight: 700; cursor: pointer; transition: background 0.2s; }
.btn-primary:hover { background: var(--bz-accent-hover); }
.btn-secondary { background: var(--bz-navy-panel); border: 1px solid var(--bz-navy-border); color: #cbd5e0; padding: 0.65rem 1.2rem; border-radius: 8px; font-weight: 700; cursor: pointer; }
.btn-danger { background: var(--bz-danger); color: white; border: 0; padding: 0.55rem 0.9rem; border-radius: 8px; font-weight: 700; cursor: pointer; transition: background 0.2s; }
.btn-danger:hover { background: var(--bz-danger-hover); }
.btn-success { background: var(--bz-success); color: white; border: 0; padding: 0.65rem 1.2rem; border-radius: 8px; font-weight: 700; cursor: pointer; transition: background 0.2s; }
.btn-success:hover { background: var(--bz-success-hover); }
.btn-act { background: var(--bz-navy-border); border: 0; color: white; padding: 0.4rem 0.8rem; border-radius: 6px; cursor: pointer; font-size: 0.82rem; font-weight: 600; }

.form-group { margin-bottom: 1rem; text-align: left; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.35rem; font-weight: 600; }

/* Corrección: Outline transparente para accesibilidad */
.form-control {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--bz-navy-border);
    color: var(--text-main);
    padding: 0.65rem 0.9rem;
    border-radius: 8px;
    font-size: 0.95rem;
    outline: 2px solid transparent;
    outline-offset: 2px;
}
.form-control:focus { border-color: var(--bz-accent); }

.pay-btn, .btn-pay {
    background: var(--bz-success);
    color: white;
    border: 0;
    padding: 0.85rem 1.2rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 900;
    cursor: pointer;
    transition: background 0.2s;
}
.pay-btn:hover, .btn-pay:hover { background: var(--bz-success-hover); }

#toast-container, .toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 10000; display: flex; flex-direction: column; gap: 0.5rem; }
.toast { background: var(--bz-navy-panel); color: white; padding: 0.8rem 1.4rem; border-radius: 8px; border-left: 5px solid var(--bz-accent); box-shadow: 0 4px 15px rgba(0,0,0,0.3); font-weight: 600; }

.modal, .modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.75);
    display: none; align-items: center; justify-content: center;
    z-index: 999;
}
.modal-content, .modal-card {
    background: var(--bz-navy-panel); border-radius: 12px; padding: 2rem;
    width: 90%; max-width: 520px; border: 1px solid var(--bz-navy-border); color: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.modal-actions { display: flex; justify-content: flex-end; gap: 0.75rem; margin-top: 1.5rem; }

.inventory-table, .pos-table { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: 0.9rem; }
.inventory-table th, .inventory-table td, .pos-table th, .pos-table td { padding: 0.85rem 1rem; text-align: left; border-bottom: 1px solid var(--bz-navy-border); }
.inventory-table th, .pos-table th { background: var(--bz-navy-header); color: #cbd5e0; font-weight: 700; }

@media print {
    body { background: white !important; color: black !important; overflow: visible !important; height: auto !important; }
    header, main, .no-print { display: none !important; }
    
    #modal-etiqueta { 
        display: block !important; 
        position: absolute !important; 
        top: 0; left: 0; right: 0; bottom: 0; 
        background: white !important; 
        width: 100% !important; 
        padding: 0 !important; 
        margin: 0 !important; 
        overflow: visible !important;
    }
    #modal-etiqueta .modal-content { 
        display: block !important; 
        position: static !important; 
        width: 100% !important; 
        max-width: 100% !important; 
        background: white !important; 
        color: black !important; 
        box-shadow: none !important; 
        border: none !important; 
        padding: 20px !important; 
    }
}