:root{--nav:#111827;--nav2:#1f2937;--bg:#f5f7fb;--text:#162033;--muted:#667085;--line:#e6eaf0;--primary:#2563eb;--danger:#dc2626}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}
.hidden{display:none!important}.login-screen{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 20% 10%,#334155,#0f172a 58%)}
.login-card{width:min(430px,92vw);background:#fff;padding:38px;border-radius:26px;box-shadow:0 30px 90px #0007}.login-card h1{margin:18px 0 4px}.login-card p{color:var(--muted);margin:0 0 24px}
.logo-mark{width:58px;height:58px;border-radius:17px;display:grid;place-items:center;background:linear-gradient(135deg,#2563eb,#7c3aed);color:#fff;font-weight:900;font-size:20px;box-shadow:0 10px 25px #2563eb55}.logo-mark.small{width:42px;height:42px;border-radius:13px;font-size:15px}
label{font-size:13px;font-weight:650;color:#344054}input,select,textarea{width:100%;padding:12px 13px;margin:6px 0 12px;border:1px solid #d8dee8;border-radius:11px;background:#fff;color:var(--text);font:inherit;outline:none}input:focus,select:focus,textarea:focus{border-color:#7aa2ff;box-shadow:0 0 0 3px #2563eb16}
textarea{min-height:92px;resize:vertical}.btn,button{border:0;border-radius:11px;padding:11px 15px;font:inherit;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px}.primary{background:var(--primary);color:#fff}.ghost{background:#fff;border:1px solid var(--line);color:var(--text)}.danger{background:#fee2e2;color:#b91c1c}.success{background:#dcfce7;color:#166534}.wide{width:100%}.error{color:#b42318;margin-top:12px}
.app{display:grid;grid-template-columns:245px minmax(0,1fr);min-height:100vh}aside{background:linear-gradient(180deg,var(--nav),#0b1220);color:#fff;padding:20px 14px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:12px;padding:6px 9px 25px;font-weight:800;font-size:19px}.brand small{display:block;font-size:10px;color:#93c5fd;letter-spacing:2px}
nav{display:flex;flex-direction:column;gap:5px}nav button,.logout{background:transparent;color:#cbd5e1;text-align:right;justify-content:flex-start;width:100%}nav button span{width:25px;text-align:center}nav button:hover,nav button.active{background:#ffffff14;color:#fff}.logout{margin-top:auto;color:#fca5a5}
main{padding:28px 32px;min-width:0}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}header h1{margin:0;font-size:28px}header p{margin:5px 0 0;color:var(--muted)}.header-actions{display:flex;gap:10px;align-items:center}.header-actions select{width:250px;margin:0}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:#fff;border:1px solid #edf0f4;border-radius:18px;padding:20px;box-shadow:0 8px 28px #1620330a}.metric-label{color:var(--muted);font-size:14px}.metric{font-size:31px;font-weight:850;margin-top:8px}.metric-icon{float:left;width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:#eff6ff}
.toolbar{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-bottom:15px}.toolbar-left{display:flex;gap:9px}.search{max-width:320px;margin:0}
.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:17px}table{width:100%;border-collapse:collapse}th,td{padding:13px 14px;text-align:right;border-bottom:1px solid #eef1f5;vertical-align:middle}th{font-size:12px;color:#667085;background:#fafbfc}.actions{display:flex;gap:6px}.actions button{padding:7px 10px;font-size:12px}
.badge{display:inline-block;padding:5px 10px;border-radius:999px;font-size:12px;font-weight:700}.badge.on{background:#dcfce7;color:#166534}.badge.off{background:#fee2e2;color:#991b1b}.badge.warn{background:#fff7d6;color:#8a5b00}
.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.category-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.category-head{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;background:#fafbfc;border-bottom:1px solid var(--line)}.category-head h3{margin:0}.product-list{padding:8px}.product-row{display:grid;grid-template-columns:58px 1fr auto;gap:12px;align-items:center;padding:10px;border-bottom:1px solid #f0f2f5}.product-row:last-child{border:0}.thumb{width:58px;height:58px;border-radius:12px;object-fit:cover;background:#eef2f7}.product-name{font-weight:750}.muted{color:var(--muted);font-size:13px}.price{font-weight:850}
.modal{position:fixed;inset:0;background:#0f172acc;display:grid;place-items:center;padding:20px;z-index:50}.modal-box{width:min(820px,96vw);max-height:92vh;overflow:auto;background:#fff;border-radius:20px;padding:22px;box-shadow:0 25px 80px #0007}.modal-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.modal-top h2{margin:0}.close{background:#eef2f7;color:#334155;padding:8px 11px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 14px}.full{grid-column:1/-1}.checks{display:flex;gap:15px;flex-wrap:wrap}.checks label{display:flex;align-items:center;gap:6px}.checks input{width:auto;margin:0}
.upload-box{border:1px dashed #b9c4d4;border-radius:13px;padding:12px;background:#fafcff}.upload-preview{width:100%;height:140px;object-fit:cover;border-radius:11px;background:#eef2f7;margin-top:8px}.upload-box input[type=file]{border:0;padding:5px;margin:0}
.qr-panel{text-align:center;max-width:620px;margin:auto}.qr-panel img{width:min(340px,90%);padding:18px;background:#fff;border-radius:20px;border:1px solid var(--line)}.qr-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:18px}
#toast{position:fixed;left:28px;bottom:28px;z-index:80}.toast-item{background:#111827;color:#fff;padding:13px 17px;border-radius:12px;box-shadow:0 10px 30px #0004;margin-top:8px}.toast-item.bad{background:#b42318}
.empty{text-align:center;padding:45px;color:var(--muted)}.stat-list{display:grid;gap:8px;margin-top:15px}.stat-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line)}
@media(max-width:1050px){.grid{grid-template-columns:repeat(2,1fr)}.catalog-grid{grid-template-columns:1fr}}
@media(max-width:780px){.app{grid-template-columns:1fr}aside{height:auto;position:static;flex-direction:row;overflow:auto;align-items:center;padding:10px}.brand{display:none}nav{flex-direction:row}nav button{white-space:nowrap}.logout{margin:0 0 0 auto;width:auto}main{padding:16px}header{align-items:flex-start;flex-direction:column;gap:13px}.header-actions{width:100%}.header-actions select{flex:1;width:auto}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}}
@media(max-width:520px){.grid{grid-template-columns:1fr}.toolbar{align-items:stretch;flex-direction:column}.toolbar-left{flex-wrap:wrap}.product-row{grid-template-columns:48px 1fr}.product-row .actions{grid-column:1/-1}.header-actions{flex-direction:column;align-items:stretch}.qr-actions{flex-direction:column}}