:root{--bg:#f1f5f9;--card:#fff;--text:#0f172a;--muted:#64748b;--primary:#2563eb;--primary-d:#1d4ed8;--border:#e2e8f0;--green:#15803d;--red:#b91c1c;--amber:#b45309}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI","Noto Sans Bengali","Kalpurush",sans-serif;background:var(--bg);color:var(--text);line-height:1.55}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
.nav{background:#0f172a;color:#fff;padding:0 16px}
.nav .in{max-width:1180px;margin:0 auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap;min-height:56px}
.nav a{color:#cbd5e1;padding:8px 10px;border-radius:6px;font-size:14px}
.nav a:hover,.nav a.on{background:#1e293b;color:#fff;text-decoration:none}
.brand{font-weight:700;font-size:18px;color:#fff!important;margin-right:12px}
.sp{flex:1}
.nav form{display:inline}.nav button{background:none;border:0;color:#cbd5e1;cursor:pointer;font-size:14px;padding:8px 10px}
.wrap{max-width:1180px;margin:24px auto;padding:0 16px}
h1{font-size:24px;margin:0 0 16px}h2{font-size:18px;margin:0 0 12px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:18px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.stat .n{font-size:26px;font-weight:700}.stat .l{color:var(--muted);font-size:13px}
.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:8px;padding:9px 16px;font-size:14px;cursor:pointer}
.btn:hover{background:var(--primary-d);text-decoration:none}
.btn.sm{padding:5px 10px;font-size:12px}.btn.gray{background:#64748b}.btn.red{background:var(--red)}.btn.green{background:var(--green)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border);vertical-align:top}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.03em}
.scroll{overflow-x:auto}
label{display:block;font-size:13px;font-weight:600;margin:12px 0 4px}
input[type=text],input[type=email],input[type=password],input[type=number],select,textarea{width:100%;padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;font:inherit;background:#fff}
textarea{min-height:90px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}
.row{display:flex;gap:14px;flex-wrap:wrap}.row>*{flex:1;min-width:180px}
.badge{display:inline-block;padding:2px 9px;border-radius:99px;font-size:12px;font-weight:600}
.badge.green{background:#dcfce7;color:var(--green)}.badge.red{background:#fee2e2;color:var(--red)}
.badge.amber{background:#fef3c7;color:var(--amber)}.badge.gray{background:#e2e8f0;color:#475569}
.flash{padding:11px 14px;border-radius:8px;margin-bottom:12px;font-size:14px}
.flash.success{background:#dcfce7;color:#14532d}.flash.error{background:#fee2e2;color:#7f1d1d}.flash.info{background:#dbeafe;color:#1e3a8a}
.muted{color:var(--muted);font-size:13px}.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}
.hero{text-align:center;padding:40px 10px}.hero h1{font-size:34px}
.price{font-size:22px;font-weight:700}
.inline{display:inline}
.center{max-width:420px;margin:40px auto}
pre.log{background:#0f172a;color:#e2e8f0;padding:12px;border-radius:8px;overflow:auto;font-size:12px;max-height:260px}
@media(max-width:640px){.hero h1{font-size:26px}}