*{box-sizing:border-box}
body{margin:0;font-family:Inter,Arial,sans-serif;background:#f4f7fb;color:#1f2937}
a{text-decoration:none;color:inherit}
.layout{display:flex;min-height:100vh}
.sidebar{width:260px;background:linear-gradient(180deg,#0f172a 0%,#111827 100%);color:#e5e7eb;padding:22px 16px;position:sticky;top:0;height:100vh}
.logo{font-size:24px;font-weight:800;color:#fff;margin-bottom:22px}
.logo span{color:#38bdf8}
.nav a{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:14px;color:#cbd5e1;margin-bottom:8px}
.nav a:hover,.nav a.active{background:rgba(255,255,255,.08);color:#fff}
.main{flex:1;padding:24px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}
.topbar h1{margin:0;font-size:28px}
.muted{color:#6b7280}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-bottom:22px}
.stat{background:#fff;border-radius:20px;padding:20px;box-shadow:0 10px 30px rgba(15,23,42,.06)}
.stat .label{font-size:13px;color:#6b7280}
.stat .value{font-size:32px;font-weight:800;margin-top:8px}
.hero{background:linear-gradient(135deg,#0ea5e9 0%,#2563eb 100%);border-radius:24px;padding:26px;color:#fff;margin-bottom:22px;box-shadow:0 16px 40px rgba(37,99,235,.25)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px}
.card{background:#fff;border-radius:20px;padding:20px;box-shadow:0 10px 30px rgba(15,23,42,.06)}
.product-title{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:12px;font-weight:700}
.price{font-size:28px;font-weight:800;margin:10px 0 8px}
.stock{margin:10px 0 0;color:#065f46;font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:11px 16px;font-weight:700;cursor:pointer}
.btn-primary{background:#111827;color:#fff}
.btn-soft{background:#eff6ff;color:#1d4ed8}
.btn-danger{background:#dc2626;color:#fff}
.btn-line{background:#fff;border:1px solid #d1d5db;color:#111827}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.table-wrap{background:#fff;border-radius:20px;box-shadow:0 10px 30px rgba(15,23,42,.06);overflow:hidden}
table{width:100%;border-collapse:collapse}
th,td{padding:14px 16px;border-bottom:1px solid #eef2f7;text-align:left;font-size:14px}
th{background:#f8fafc;color:#64748b}
.notice{padding:14px 16px;border-radius:14px;background:#ecfeff;color:#155e75;margin-bottom:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
label{font-size:14px;font-weight:600;display:block;margin-bottom:8px}
input,textarea,select{width:100%;padding:12px 14px;border:1px solid #d6deea;border-radius:14px;background:#fff}
textarea{min-height:220px;resize:vertical}
.login-wrap{max-width:420px;margin:70px auto;background:#fff;border-radius:22px;padding:24px;box-shadow:0 18px 45px rgba(15,23,42,.12)}
.login-head{text-align:center;margin-bottom:20px}
.list-clean{margin:0;padding-left:18px}
.code{background:#0f172a;color:#e2e8f0;padding:12px 14px;border-radius:14px;font-family:Consolas,monospace;overflow:auto}
@media (max-width: 900px){
  .layout{display:block}
  .sidebar{width:auto;height:auto;position:relative}
  .form-grid{grid-template-columns:1fr}
}