:root{--primary: #2563eb;--secondary: #0f172a;--bg: #f8fafc;--card: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--danger: #dc2626;--success: #16a34a;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:15px}a{color:var(--primary);text-decoration:none}h1,h2,h3{margin:0 0 12px}.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--secondary);color:#fff;padding:16px 12px;display:flex;flex-direction:column;gap:4px;flex-shrink:0}.sidebar .brand{display:flex;align-items:center;gap:10px;padding:8px 10px 20px;font-weight:700;font-size:18px}.sidebar .brand img{width:32px;height:32px;border-radius:6px;object-fit:cover}.sidebar a{color:#cbd5e1;padding:10px 12px;border-radius:8px;display:block}.sidebar a.active,.sidebar a:hover{background:#ffffff1f;color:#fff}.sidebar .spacer{flex:1}.content{flex:1;padding:24px;max-width:1200px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:12px;flex-wrap:wrap}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.grid{display:grid;gap:14px}.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.grid.cols-4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}.stat .label{color:var(--muted);font-size:13px}.stat .value{font-size:26px;font-weight:700;margin-top:4px}button,.btn{background:var(--primary);color:#fff;border:0;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer}button:hover,.btn:hover{filter:brightness(1.08)}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}button.danger{background:var(--danger)}button.small{padding:6px 10px;font-size:13px}input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;background:#fff;color:var(--text)}input:focus,select:focus,textarea:focus{outline:2px solid var(--primary);outline-offset:-1px}label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}tr:hover td{background:#f1f5f9}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600;background:#e2e8f0}.badge.success{background:#dcfce7;color:var(--success)}.badge.danger{background:#fee2e2;color:var(--danger)}.badge.warn{background:#fef9c3;color:#a16207}.alert{padding:12px 16px;border-radius:8px;margin-bottom:14px;font-size:14px}.alert.error{background:#fee2e2;color:var(--danger)}.alert.success{background:#dcfce7;color:var(--success)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.auth-card{width:100%;max-width:460px}.auth-card .logo{text-align:center;font-size:26px;font-weight:800;color:var(--primary);margin-bottom:18px}.pos-grid{display:grid;grid-template-columns:1fr 340px;gap:16px;align-items:start}.pos-total{font-size:34px;font-weight:800;text-align:right}.pos-search-results{position:absolute;background:#fff;border:1px solid var(--border);border-radius:8px;width:100%;z-index:20;max-height:300px;overflow:auto;box-shadow:0 8px 24px #0000001f}.pos-search-results div{padding:10px 14px;cursor:pointer}.pos-search-results div:hover,.pos-search-results div.selected{background:#f1f5f9}.receipt{max-width:300px;margin:0 auto;font-family:Courier New,monospace;font-size:12px}.receipt hr{border:0;border-top:1px dashed #000}.receipt table td,.receipt table th{padding:2px 4px;border:0;font-size:12px}@media print{body *{visibility:hidden}.receipt,.receipt *{visibility:visible}.receipt{position:absolute;left:0;top:0;max-width:80mm}}.busy-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:999;background:transparent;cursor:progress}.toast-stack{position:fixed;right:16px;bottom:16px;z-index:1000;display:flex;flex-direction:column;gap:8px;align-items:flex-end;pointer-events:none}.toast{display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:8px;font-size:14px;background:var(--card);box-shadow:0 4px 12px #0f172a26}.toast.loading{color:var(--muted);border:1px solid var(--border)}.toast.success{background:var(--success);color:#fff}.spinner{width:12px;height:12px;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.help-tip{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;padding:0;margin-left:6px;border:1px solid var(--border);border-radius:50%;background:var(--card);color:var(--muted);font-size:11px;font-weight:700;line-height:1;cursor:pointer;vertical-align:middle}.help-tip:hover{color:var(--primary);border-color:var(--primary)}.help-tip-text{margin:4px 0 0;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--muted);font-size:13px}@media (max-width: 820px){.layout{flex-direction:column}.sidebar{width:100%;flex-direction:row;overflow-x:auto;align-items:center;padding:8px}.sidebar .brand{padding:4px 10px}.sidebar a{white-space:nowrap;padding:8px 10px}.sidebar .spacer{display:none}.content{padding:14px}.pos-grid{grid-template-columns:1fr}}