:root{font-family:Inter,Segoe UI,Arial,sans-serif;color:#172033;background:#f4f6fa}*{box-sizing:border-box}body{margin:0}.sidebar{position:fixed;inset:0 auto 0 0;width:235px;background:#111827;color:white;padding:24px 18px;display:flex;flex-direction:column}.brand{font-size:20px;font-weight:800;margin-bottom:28px}.brand small{display:block;font-size:11px;font-weight:500;color:#9ca3af;margin-top:5px}.sidebar nav{display:grid;gap:6px}.sidebar nav a{color:#d1d5db;text-decoration:none;padding:11px 12px;border-radius:8px}.sidebar nav a:hover{background:#1f2937;color:white}.user{margin-top:auto;font-size:12px;color:#9ca3af}.user button{margin-top:10px;background:none;border:1px solid #374151;color:white;padding:7px 12px;border-radius:7px}.content{margin-left:235px;padding:30px;min-height:100vh}.login-content{min-height:100vh;display:grid;place-items:center}.login-card{width:min(420px,92vw);background:white;padding:34px;border-radius:16px;box-shadow:0 15px 50px #0002}.login-card form{display:grid;gap:10px}.login-card small{display:block;margin-top:18px;color:#64748b}.page-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.page-head h1{margin:0}.page-head p{margin:5px 0 0;color:#64748b}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:18px}.stat,.panel{background:white;border:1px solid #e5e7eb;border-radius:13px;padding:20px}.stat span,.stat small{display:block;color:#64748b}.stat strong{display:block;font-size:27px;margin:8px 0}.grid2{display:grid;grid-template-columns:2fr 1fr;gap:18px;margin-bottom:18px}.panel h2{margin-top:0;font-size:18px}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:11px;border-bottom:1px solid #edf0f4;font-size:14px}th{color:#64748b;font-size:12px;text-transform:uppercase}.empty{text-align:center;color:#94a3b8;padding:25px}.inventory-alert{display:flex;align-items:baseline;gap:10px;padding:10px 0}.inventory-alert strong{font-size:30px}.button,button{display:inline-block;border:0;border-radius:8px;padding:10px 15px;text-decoration:none;cursor:pointer;background:#e5e7eb;color:#172033;font:inherit}.primary{background:#2563eb!important;color:white!important}.full{width:100%}label{display:grid;gap:6px;font-size:13px;font-weight:600}input,select,textarea{width:100%;border:1px solid #cbd5e1;border-radius:8px;padding:10px 11px;font:inherit;background:white}textarea{min-height:90px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:850px}.span2{grid-column:1/-1}.form-actions{display:flex;justify-content:flex-end;gap:10px}.validation{color:#b91c1c}.alert{padding:12px 15px;border-radius:9px;margin-bottom:15px}.success{background:#dcfce7;color:#166534}.error{background:#fee2e2;color:#991b1b}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}.product-card{background:white;border:1px solid #e5e7eb;border-radius:13px;overflow:hidden}.product-card>div:last-child{padding:16px}.product-card.inactive{opacity:.55}.product-image{height:150px;background:#eef2f7;display:grid;place-items:center;color:#94a3b8}.product-image img{width:100%;height:100%;object-fit:cover}.product-card h3{margin:6px 0}.product-card p{font-size:13px;color:#64748b;min-height:34px}.price{font-size:21px;font-weight:800}.stock{margin:8px 0}.actions{display:flex;gap:10px;align-items:center}.actions form{display:inline}.actions button{padding:5px 8px}.sale-layout{display:grid;grid-template-columns:1fr 360px;gap:18px}.sale-products{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px;margin-top:14px}.sale-product{text-align:left;background:#f8fafc;border:1px solid #e2e8f0;display:grid;gap:4px}.sale-product span{font-weight:700}.sale-product small{color:#64748b}.cart{position:sticky;top:20px;height:max-content}.cart-row{display:grid;grid-template-columns:1fr 70px 30px;gap:8px;align-items:center;padding:9px 0;border-bottom:1px solid #eee}.cart-row input{padding:7px}.cart-row button{padding:5px}.totals{margin:15px 0;display:grid;gap:10px}.totals>div{display:flex;justify-content:space-between}.grand{font-size:20px}.receipt{max-width:750px;margin:auto}.receipt-head{display:grid;gap:5px;text-align:center;margin-bottom:20px}.receipt-total{margin-left:auto;width:280px;display:grid;gap:7px;text-align:right;margin-top:20px}@media(max-width:1000px){.cards{grid-template-columns:1fr 1fr}.sale-layout{grid-template-columns:1fr}.cart{position:static}.grid2{grid-template-columns:1fr}}@media(max-width:720px){.sidebar{position:static;width:100%;height:auto}.content{margin-left:0;padding:16px}.sidebar nav{grid-template-columns:repeat(2,1fr)}.user{margin-top:20px}.cards{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.span2{grid-column:auto}.page-head{align-items:flex-start;gap:12px}.product-grid{grid-template-columns:1fr 1fr}}@media print{.sidebar,.page-head button,.page-head a{display:none!important}.content{margin:0;padding:0}.receipt{border:0}}