:root{--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#64748b;--line:#e2e8f0;--primary:#2563eb;--danger:#dc2626}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;background:#0f172a;color:#fff}.brand{font-weight:800}.topbar a{color:#dbeafe;text-decoration:none;margin-left:18px;font-size:14px}.container{max-width:1180px;margin:28px auto;padding:0 20px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:0 10px 30px rgba(15,23,42,.06);padding:22px;margin-bottom:18px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.stat{font-size:30px;font-weight:800}.muted{color:var(--muted)}
input,select,textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}label{display:block;font-weight:650;margin:12px 0 6px}.btn{display:inline-block;border:0;border-radius:12px;background:var(--primary);color:#fff;padding:11px 16px;text-decoration:none;cursor:pointer;font-weight:700}.btn.secondary{background:#334155}.btn.danger{background:var(--danger)}table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}th,td{padding:13px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:13px;color:#475569;background:#f8fafc}.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:12px}.alert{padding:12px 14px;border-radius:12px;background:#ecfdf5;color:#065f46}.error{background:#fef2f2;color:#991b1b}.actions{display:flex;gap:8px;flex-wrap:wrap}.login{max-width:460px;margin:8vh auto}.small{font-size:12px}@media(max-width:900px){.grid{grid-template-columns:1fr}.topbar{display:block}.topbar a{display:inline-block;margin:12px 12px 0 0}}