*{box-sizing:border-box}
:root{--bg:#f4f7fb;--card:#fff;--text:#182230;--muted:#718096;--line:#e5eaf0;--primary:#1769ff;--primary2:#0d55d8}
body{margin:0;font-family:Tahoma,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.8}
a{color:var(--primary);text-decoration:none}
.topbar{background:#101827;color:#fff;padding:14px 6%;display:flex;align-items:center;justify-content:space-between;gap:20px;position:sticky;top:0;z-index:10}
.topbar nav{display:flex;gap:16px;flex-wrap:wrap}.topbar nav a{color:#fff}
.muted-light{color:#b8c2d1}.container{width:min(1180px,92%);margin:30px auto}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}.page-head h1{margin:0}.muted{color:var(--muted)}
.card,.stat-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 8px 28px rgba(20,38,70,.04);margin-bottom:20px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}.stat-card{margin:0;color:var(--text);display:flex;justify-content:space-between;align-items:center}.stat-card strong{font-size:28px}
label{display:block;font-weight:700;margin:9px 0 5px}input,textarea,select{width:100%;border:1px solid #d8e0ea;border-radius:10px;padding:11px 12px;font:inherit;background:#fff}input:focus,textarea:focus,select:focus{outline:2px solid rgba(23,105,255,.15);border-color:var(--primary)}
.grid-2,.grid-3,.grid-4{display:grid;gap:14px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}
.btn{display:inline-block;border:0;border-radius:10px;padding:10px 17px;font:inherit;cursor:pointer}.btn.primary{background:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary2)}.btn.secondary{background:#edf2f7;color:#253247}.btn.small{padding:6px 10px;font-size:13px}.btn.full{width:100%;margin-top:14px}
.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;min-width:680px}th,td{text-align:right;padding:12px;border-bottom:1px solid var(--line)}th{background:#f8fafc}.total-row{font-weight:700}.qty{max-width:90px}
.badge{display:inline-block;border-radius:999px;padding:4px 10px;font-size:13px}.badge.big{font-size:15px;padding:7px 14px}.badge-blue{background:#e7f0ff;color:#1557c0}.badge-yellow{background:#fff5d7;color:#8b6500}.badge-purple{background:#f0e9ff;color:#6434b5}.badge-green{background:#e3f8eb;color:#13723a}.badge-red{background:#ffe8e8;color:#b92b2b}
.alert{padding:12px 15px;border-radius:10px;margin:13px 0}.alert.error{background:#ffecec;color:#9c2525}.alert.success{background:#e8faef;color:#176b38}.alert.warning{background:#fff5dc;color:#785b0b}
.auth-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,#eef4ff,#f8fbff)}.auth-card{width:min(430px,100%);background:#fff;padding:30px;border-radius:20px;box-shadow:0 20px 60px rgba(30,55,90,.12)}.auth-card h1{text-align:center}.brand-icon{width:58px;height:58px;border-radius:18px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:30px;font-weight:700;margin:auto}
.product-edit{border-bottom:1px solid var(--line);padding:15px 0}.actions{display:flex;align-items:center;gap:8px;margin-top:8px}.inline-form{display:inline}
@media(max-width:850px){.stats,.grid-4,.grid-3,.grid-2{grid-template-columns:1fr 1fr}.topbar{align-items:flex-start;flex-direction:column}}
@media(max-width:560px){.stats,.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}.page-head{align-items:flex-start;flex-direction:column}.container{width:94%;margin:18px auto}.card{padding:15px}.topbar{padding:12px 4%}}