:root{--blue:#2563eb;--navy:#0f172a;--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#64748b;--line:#e7ebf2;--green:#10b981;--red:#ef4444}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Tahoma,Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.login{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 20% 10%,#dbeafe,transparent 40%),linear-gradient(135deg,#f8fafc,#eff6ff)}.login-card{width:min(430px,92%);background:#fff;padding:40px;border-radius:28px;box-shadow:0 25px 70px #1e3a8a20}.brand{display:flex;gap:13px;align-items:center;font-weight:800;font-size:20px}.logo{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#2563eb,#60a5fa);color:#fff;display:grid;place-items:center;font-weight:900}.login h1{font-size:28px;margin:34px 0 8px}.muted{color:var(--muted)}label{display:block;font-size:13px;font-weight:700;margin:16px 0 7px}input,select,textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:12px;padding:11px 13px;font:inherit;outline:none}input:focus,select:focus,textarea:focus{border-color:#93c5fd;box-shadow:0 0 0 4px #dbeafe}.btn{border:0;background:var(--blue);color:#fff;padding:11px 16px;border-radius:12px;font-weight:700;cursor:pointer;display:inline-flex;gap:7px;align-items:center}.btn.light{background:#eff6ff;color:#1d4ed8}.btn.red{background:#fee2e2;color:#b91c1c}.btn.green{background:#d1fae5;color:#047857}.login .btn{width:100%;justify-content:center;margin-top:22px}.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.sidebar{background:var(--navy);color:#cbd5e1;padding:22px 15px;position:fixed;width:260px;height:100vh;overflow:auto}.sidebar .brand{color:#fff;padding:0 9px 24px}.nav-title{font-size:10px;text-transform:uppercase;letter-spacing:1.4px;color:#64748b;padding:18px 12px 8px}.nav a{display:flex;align-items:center;gap:11px;padding:11px 13px;margin:3px 0;border-radius:11px;font-size:14px}.nav a:hover,.nav a.active{background:#1e293b;color:#fff}.main{grid-column:2;padding:24px 28px}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.top h1{margin:0;font-size:25px}.user{display:flex;gap:10px;align-items:center;background:#fff;border:1px solid var(--line);padding:7px 12px;border-radius:14px}.avatar{width:34px;height:34px;border-radius:10px;background:#dbeafe;color:#1d4ed8;display:grid;place-items:center;font-weight:800}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stat,.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 6px 24px #0f172a08}.stat span{font-size:13px;color:var(--muted)}.stat strong{display:block;font-size:25px;margin-top:9px}.stat i{float:right;width:42px;height:42px;border-radius:13px;background:#eff6ff;color:#2563eb;display:grid;place-items:center;font-style:normal}.card{margin-top:18px}.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.card h3{margin:0;font-size:17px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:14px}th{text-align:left;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.5px;padding:12px;border-bottom:1px solid var(--line)}td{padding:13px 12px;border-bottom:1px solid #f1f5f9}.badge{display:inline-block;padding:5px 9px;border-radius:99px;background:#d1fae5;color:#047857;font-size:11px;font-weight:800}.badge.low{background:#fee2e2;color:#b91c1c}.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.form-grid .wide{grid-column:span 2}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.toolbar input{max-width:260px}.alert{padding:12px 15px;border-radius:12px;margin-bottom:17px;background:#d1fae5;color:#065f46}.alert.error{background:#fee2e2;color:#991b1b}.pos{display:grid;grid-template-columns:1.45fr .8fr;gap:18px}.products{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.product{border:1px solid var(--line);background:#fff;border-radius:15px;padding:15px;cursor:pointer}.product:hover{border-color:#93c5fd;transform:translateY(-1px)}.product b{display:block;margin-bottom:6px}.cart{position:sticky;top:20px}.cart-row{display:grid;grid-template-columns:1fr 65px 90px 30px;gap:7px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}.totals{margin-top:16px;border-top:2px dashed var(--line);padding-top:12px}.total-line{display:flex;justify-content:space-between;padding:6px 0}.total-line.big{font-size:20px;font-weight:900}.empty{text-align:center;color:var(--muted);padding:35px}.footer-note{text-align:center;color:#94a3b8;font-size:12px;padding:25px}@media(max-width:1000px){.grid{grid-template-columns:repeat(2,1fr)}.pos{grid-template-columns:1fr}.products{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:span 1}}@media(max-width:720px){.app{display:block}.sidebar{position:relative;width:100%;height:auto}.main{padding:18px}.grid{grid-template-columns:1fr}.products{grid-template-columns:1fr}.top{align-items:flex-start}.user .name{display:none}}