*{box-sizing:border-box}body{margin:0;background:#f3f6fb;color:#172033;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.app-shell{min-height:100vh;display:flex}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;background:#111827;color:#fff;padding:22px 16px;display:flex;flex-direction:column}.brand{font-weight:800;font-size:1.35rem;padding:8px 10px 24px}.sidebar nav{display:grid;gap:6px}.sidebar .nav-link{color:#d1d5db;border-radius:12px;padding:11px 12px;text-decoration:none}.sidebar .nav-link:hover{background:#1f2937;color:#fff}.sidebar .disabled{opacity:.45;pointer-events:none}.sidebar-footer{margin-top:auto;padding:12px}.main-content{margin-left:250px;width:calc(100% - 250px);padding:28px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.topbar h1{font-size:1.65rem;margin:0}.topbar p{margin:4px 0 0;color:#6b7280}.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.stat-card{background:#fff;border-radius:18px;padding:20px;box-shadow:0 12px 35px rgba(15,23,42,.06);border:1px solid #e8edf5}.stat-card span{display:block;color:#64748b;font-weight:600}.stat-card strong{display:block;font-size:2rem;margin-top:8px}.stat-card small{color:#94a3b8}.stat-card.warning{border-left:5px solid #f59e0b}.stat-card.danger{border-left:5px solid #ef4444}.panel{background:#fff;border-radius:18px;padding:24px;box-shadow:0 12px 35px rgba(15,23,42,.06);border:1px solid #e8edf5}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.panel h2{font-size:1.2rem;margin:0}.panel p{margin:5px 0 0;color:#64748b}.module-card{padding:18px;border-radius:14px;background:#f8fafc;border:1px solid #e2e8f0;display:grid;gap:6px}.btn-primary{background:var(--primary,#2563eb);border-color:var(--primary,#2563eb)}.login-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top left,#dbeafe,#f8fafc 45%,#eef2ff)}.login-card{width:min(430px,92vw);background:#fff;border-radius:24px;padding:32px;box-shadow:0 30px 80px rgba(15,23,42,.15)}.login-card h1{text-align:center;margin:14px 0 4px}.login-card>p{text-align:center;color:#64748b;margin-bottom:24px}.login-brand{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;margin:auto;background:#2563eb;color:#fff;font-size:2rem;font-weight:800}.demo-box{margin-top:20px;padding:12px;border-radius:12px;background:#f8fafc;color:#475569;font-size:.9rem}@media(max-width:900px){.sidebar{position:static;width:100%;min-height:auto}.app-shell{display:block}.main-content{margin-left:0;width:100%;padding:18px}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.stats-grid{grid-template-columns:1fr}.topbar{align-items:flex-start;gap:12px}.sidebar nav{grid-template-columns:1fr 1fr}.sidebar-footer{padding-bottom:0}}

.pos-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(330px,.75fr);gap:20px}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.product-tile{border:1px solid #e2e8f0;background:#fff;border-radius:15px;padding:15px;text-align:left;display:flex;flex-direction:column;gap:5px;transition:.15s}.product-tile:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 22px rgba(15,23,42,.08)}.product-tile span,.product-tile small{color:#64748b}.product-tile b{color:var(--primary)}.pos-cart{position:sticky;top:20px;align-self:start}.cart-line{display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center;padding:11px 0;border-bottom:1px solid #eef2f7}.cart-line small{display:block;color:#64748b}.qty{display:flex;align-items:center;gap:8px}.qty button,.remove{width:30px;height:30px;border:0;border-radius:8px;background:#eef2f7}.remove{color:#dc2626}.total-box{padding:16px;background:#111827;color:#fff;border-radius:14px;display:flex;justify-content:space-between;align-items:center}.total-box strong{font-size:1.4rem}.one-col{grid-template-columns:1fr}.invoice{position:relative;max-width:780px;margin:auto;background:#fff;padding:32px;border:1px solid #e5e7eb;border-radius:16px}.invoice header{text-align:center}.invoice table{width:100%;border-collapse:collapse;margin:20px 0}.invoice th,.invoice td{padding:9px;border-bottom:1px solid #e5e7eb;text-align:left}.invoice-totals{text-align:right}.invoice footer{text-align:center;margin-top:30px}.invoice-cancelled{position:absolute;inset:45% auto auto 28%;font-size:4rem;font-weight:900;color:rgba(220,38,38,.25);transform:rotate(-18deg)}@media(max-width:1100px){.pos-grid{grid-template-columns:1fr}.pos-cart{position:static}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.product-grid{grid-template-columns:1fr}}@media print{.sidebar,.topbar,.invoice-actions,.alert{display:none!important}.main-content{margin:0;width:100%;padding:0}.invoice{border:0;border-radius:0;max-width:none}.panel{box-shadow:none}}
/* Fase 8: navegación dinámica, alertas y cabecera de usuario */
.sidebar{padding:0;overflow:hidden}.brand{display:flex;align-items:center;flex:0 0 auto;padding:20px 18px 16px;border-bottom:1px solid rgba(255,255,255,.08)}.brand img{max-width:44px;max-height:44px;object-fit:contain;margin-right:9px}.sidebar-nav{display:flex!important;flex-direction:column;gap:6px;overflow-y:auto;overflow-x:hidden;min-height:0;padding:14px 16px 24px;scrollbar-width:thin;scrollbar-color:#475569 transparent}.sidebar-nav::-webkit-scrollbar{width:7px}.sidebar-nav::-webkit-scrollbar-thumb{background:#475569;border-radius:10px}.inventory-alert-link{display:flex!important;justify-content:space-between;align-items:center;gap:8px}.inventory-alert-link.has-alerts{background:#7f1d1d!important;color:#fff!important;border:1px solid #ef4444}.inventory-alert-badge{min-width:25px;height:25px;border-radius:999px;background:#ef4444;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:800;box-shadow:0 0 0 3px rgba(239,68,68,.18)}.topbar-user{display:flex;align-items:center;gap:12px}.user-role-box{display:flex;flex-direction:column;align-items:flex-end;gap:4px}.user-name{font-weight:700}.inventory-warning-banner{border-left:5px solid #b91c1c}.profit-card{border-left:5px solid #16a34a;background:linear-gradient(135deg,#fff,#f0fdf4)}.welcome-panel{background:linear-gradient(135deg,#fff,#eff6ff)}
@media(max-width:900px){.sidebar{position:static;max-height:none}.sidebar-nav{overflow:visible}.topbar-user{align-items:flex-end}.user-role-box{display:none}}
@media(max-width:560px){.topbar{flex-direction:column}.topbar-user{width:100%;justify-content:space-between}.inventory-warning-banner{align-items:flex-start!important;gap:12px;flex-direction:column}}
/* Dervimarket Enterprise */
.inventory-value-card{border-left:5px solid #0ea5e9;background:linear-gradient(135deg,#fff,#f0f9ff)}
.net-profit-card{border-left:5px solid #7c3aed;background:linear-gradient(135deg,#fff,#f5f3ff)}
.sidebar-nav .nav-link{flex:0 0 auto}
.table small{color:#64748b}
@media(min-width:1200px){.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}