:root{
  --bg:#f4f6fa; --panel:#fff; --ink:#1f2733; --muted:#6b7280;
  --primary:#2563eb; --primary-d:#1d4ed8; --line:#e5e7eb;
  --green:#16a34a; --red:#dc2626; --amber:#d97706;
  --radius:10px; --shadow:0 1px 3px rgba(16,24,40,.08),0 1px 2px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",Tahoma,"Noto Sans Bengali",Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
a{color:var(--primary);text-decoration:none}
.layout{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{width:230px;background:#0f172a;color:#cbd5e1;flex-shrink:0;display:flex;flex-direction:column;padding:16px 0}
.brand{font-size:20px;font-weight:700;color:#fff;padding:4px 20px 10px}
.shop-pill{margin:0 16px 14px;padding:6px 10px;background:#1e293b;border-radius:8px;font-size:12px;color:#93c5fd}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 20px;color:#cbd5e1;border-left:3px solid transparent}
.nav-item:hover{background:#1e293b;color:#fff}
.nav-item.active{background:#1e293b;color:#fff;border-left-color:var(--primary)}
.nav-item .ic{width:20px;text-align:center}

/* Main */
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{height:60px;background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.page-title{font-size:18px;font-weight:600}
.user-box{display:flex;align-items:center;gap:14px}
.uname small{color:var(--muted)}
.content{padding:24px;flex:1}

/* Cards */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:20px}
.card h2,.card h3{margin-top:0}
.grid{display:grid;gap:16px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr 1fr}}

/* Stat tiles */
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.stat .label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}
.stat .value{font-size:24px;font-weight:700;margin-top:6px}
.stat.green .value{color:var(--green)} .stat.red .value{color:var(--red)} .stat.blue .value{color:var(--primary)}

/* Tables */
table{width:100%;border-collapse:collapse}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left}
th{background:#f8fafc;font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
tbody tr:hover{background:#f8fafc}
.text-right{text-align:right} .text-center{text-align:center}
.num{text-align:right;font-variant-numeric:tabular-nums}

/* Forms */
.form-row{margin-bottom:14px}
label{display:block;font-weight:600;margin-bottom:5px;font-size:13px}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.inline{display:flex;gap:12px;flex-wrap:wrap}
.inline>*{flex:1}

/* Buttons */
.btn{display:inline-block;padding:9px 16px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:600;cursor:pointer;background:var(--primary);color:#fff}
.btn:hover{background:var(--primary-d)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{background:#f1f5f9}
.btn-danger{background:var(--red)} .btn-success{background:var(--green)}
.btn-sm{padding:5px 10px;font-size:12px}

/* Badges */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.badge-green{background:#dcfce7;color:#15803d} .badge-red{background:#fee2e2;color:#b91c1c}
.badge-amber{background:#fef3c7;color:#b45309} .badge-blue{background:#dbeafe;color:#1d4ed8}
.badge-gray{background:#f1f5f9;color:#475569}

/* Flash */
.flash{padding:11px 16px;border-radius:8px;margin-bottom:16px;font-weight:500}
.flash-success{background:#dcfce7;color:#166534} .flash-error{background:#fee2e2;color:#991b1b}
.flash-info{background:#dbeafe;color:#1e40af}

/* Auth */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e293b,#0f172a)}
.auth-card{background:#fff;border-radius:14px;box-shadow:0 20px 40px rgba(0,0,0,.3);padding:34px;width:360px}
.auth-card h1{margin:0 0 4px;font-size:22px}
.auth-card .sub{color:var(--muted);margin-bottom:22px}
.auth-help{text-align:right;margin:-4px 0 18px;font-size:13px}

.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:12px;flex-wrap:wrap}
.muted{color:var(--muted)}