:root{--bg:#f5f7fb;--panel:#fff;--text:#172033;--muted:#6b7280;--line:#e5e7eb;--accent:#1d4ed8;--danger:#b91c1c;--ok:#166534;--warn:#92400e}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}.topbar{height:64px;background:#0f172a;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:700}.brand img{height:38px;max-width:120px;object-fit:contain;background:#fff;border-radius:6px;padding:3px}.userbox{font-size:14px}.userbox a{color:#bfdbfe;margin-left:12px}.shell{display:flex;min-height:calc(100vh - 64px)}.sidebar{width:220px;background:#111827;padding:18px 10px}.sidebar a{display:block;color:#d1d5db;padding:11px 12px;border-radius:8px;margin:2px 0}.sidebar a:hover{background:#1f2937;color:#fff}.content{flex:1;padding:26px;max-width:1500px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:18px;box-shadow:0 1px 2px rgba(0,0,0,.03)}h1,h2,h3{margin-top:0}h1{font-size:26px}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.card .num{font-size:26px;font-weight:800;margin-top:8px}.muted{color:var(--muted);font-size:13px}.btn{display:inline-block;border:0;border-radius:8px;padding:9px 13px;background:var(--accent);color:#fff;cursor:pointer;font-weight:600}.btn.secondary{background:#475569}.btn.danger{background:var(--danger)}.btn.success{background:var(--ok)}.btn.light{background:#e2e8f0;color:#111827}.toolbar{display:flex;gap:8px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:14px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.form-group{margin-bottom:12px}.form-group label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}.form-control,select,textarea,input[type=text],input[type=number],input[type=date],input[type=password],input[type=email]{width:100%;padding:9px 10px;border:1px solid #cbd5e1;border-radius:8px;background:#fff}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;background:#fff}th,td{border-bottom:1px solid var(--line);padding:10px 9px;text-align:left;vertical-align:top;font-size:14px}th{background:#f8fafc;font-size:12px;text-transform:uppercase;color:#475569}.badge{display:inline-block;padding:4px 8px;border-radius:999px;font-size:11px;font-weight:800}.badge.unpaid{background:#fef3c7;color:#92400e}.badge.paid{background:#dcfce7;color:#166534}.badge.batch{background:#dbeafe;color:#1e40af}.alert{padding:12px 14px;border-radius:8px;margin-bottom:14px}.alert.success{background:#dcfce7;color:#166534}.alert.error{background:#fee2e2;color:#991b1b}.alert.warning{background:#fef3c7;color:#92400e}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(420px,100%);background:#fff;padding:28px;border:1px solid var(--line);border-radius:14px}.section{border:1px solid var(--line);border-radius:10px;padding:14px;margin:12px 0}.inline{display:flex;gap:8px;align-items:end;flex-wrap:wrap}.right{text-align:right}.print-only{display:none}@media(max-width:900px){.sidebar{width:170px}.grid{grid-template-columns:repeat(2,1fr)}.form-grid{grid-template-columns:1fr}.content{padding:16px}}@media(max-width:650px){.shell{display:block}.sidebar{width:100%;display:flex;overflow:auto}.sidebar a{white-space:nowrap}.grid{grid-template-columns:1fr}.topbar{padding:0 12px}.userbox{font-size:12px}}@media print{.topbar,.sidebar,.no-print,.alert{display:none!important}.shell{display:block}.content{padding:0;max-width:none}.panel{border:0;box-shadow:none}.print-only{display:block}body{background:#fff}}