:root{--bg:#f5f7fb;--card:#fff;--text:#1f2937;--muted:#6b7280;--primary:#2563eb;--primary-hover:#1d4ed8;--border:#e5e7eb;--danger:#dc2626;--success:#16a34a}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1100px;margin:0 auto;padding:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:20px;box-shadow:0 1px 2px #0000000a}h1{margin:0 0 16px;font-size:22px}h2{margin:0 0 12px;font-size:18px}label{color:var(--muted);margin-bottom:4px;font-size:13px;display:block}input,select,textarea{border:1px solid var(--border);width:100%;color:var(--text);background:#fff;border-radius:6px;padding:9px 10px;font-size:14px}input:focus,select:focus,textarea:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #2563eb26}.row{grid-template-columns:repeat(2,1fr);gap:14px;display:grid}.row-3{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.field{margin-bottom:12px}.btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:9px 16px;font-size:14px;font-weight:500;display:inline-block}.btn:hover{background:var(--primary-hover)}.btn.secondary{color:var(--text);border:1px solid var(--border);background:#fff}.btn.danger{background:var(--danger)}.btn:disabled{opacity:.6;cursor:not-allowed}.nav{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;padding:12px 24px;display:flex}.nav .links a{color:var(--text);margin-right:16px;font-weight:500}.nav .user{color:var(--muted);font-size:14px}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--border);padding:10px 12px;font-size:14px}th{color:var(--muted);background:#f9fafb;font-weight:600}.alert{border-radius:6px;margin-bottom:12px;padding:10px 12px;font-size:14px}.alert.error{color:#991b1b;background:#fee2e2}.alert.success{color:#166534;background:#dcfce7}.login-wrap{background:linear-gradient(135deg,#eef2ff 0%,#f5f7fb 100%);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{width:100%;max-width:380px}@media (max-width:640px){.row,.row-3{grid-template-columns:1fr}}