:root{--primary:#4f46e5;--primary-dark:#3730a3;--bg:#f4f6fb;--text:#1f2937;--muted:#6b7280;--card:#fff;--border:#e5e7eb;--success:#16a34a;--warning:#f59e0b;--danger:#dc2626;--info:#2563eb}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.sidebar{position:fixed;top:0;left:0;width:260px;height:100vh;background:#111827;color:#fff;overflow-y:auto;z-index:10}.brand{font-size:24px;font-weight:700;padding:22px;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar nav{padding:12px}.sidebar a{display:block;padding:10px 12px;border-radius:8px;color:#d1d5db;margin:2px 0}.sidebar a:hover{background:#1f2937;color:#fff}.nav-group{font-size:12px;text-transform:uppercase;color:#9ca3af;margin:18px 12px 6px}.topbar{position:fixed;left:260px;right:0;top:0;height:68px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:9}.topbar h1{font-size:20px;margin:0}.menu-btn{display:none;border:0;background:var(--primary);color:#fff;border-radius:8px;padding:8px 12px}.user-menu{display:flex;gap:16px;align-items:center}.user-menu a{color:var(--primary);font-weight:700}.main-content{margin-left:260px;padding:92px 24px 32px}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 4px 18px rgba(17,24,39,.04);margin-bottom:18px}.grid{display:grid;gap:18px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.page-actions{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;gap:12px}.btn{display:inline-block;border:0;border-radius:8px;padding:10px 14px;font-weight:700;cursor:pointer;background:var(--primary);color:#fff}.btn:hover{background:var(--primary-dark)}.btn-secondary{background:#64748b}.btn-danger{background:var(--danger)}.btn-success{background:var(--success)}.btn-light{background:#e5e7eb;color:#111827}.alert{padding:12px 14px;border-radius:8px;margin-bottom:16px}.alert-success{background:#dcfce7;color:#166534}.alert-danger{background:#fee2e2;color:#991b1b}.alert-warning{background:#fef3c7;color:#92400e}.alert-info{background:#dbeafe;color:#1e40af}.badge{padding:5px 9px;border-radius:999px;font-size:12px;font-weight:700}.badge-success{background:#dcfce7;color:#166534}.badge-warning{background:#fef3c7;color:#92400e}.badge-danger{background:#fee2e2;color:#991b1b}.badge-info{background:#dbeafe;color:#1e40af}.muted{color:var(--muted)}.profile-row{display:grid;grid-template-columns:200px 1fr;border-bottom:1px solid var(--border);padding:12px 0}.profile-row strong{color:#374151}.toolbar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}.empty{padding:24px;text-align:center;color:var(--muted)}@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:translateX(0)}.topbar{left:0}.menu-btn{display:block}.main-content{margin-left:0}.grid-4,.grid-2{grid-template-columns:1fr}.page-actions{flex-direction:column;align-items:flex-start}}