*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:#f5f7fb;color:#1f2937}.top{background:#111827;color:white;padding:14px 5%;display:flex;justify-content:space-between;align-items:center}.top a{color:#fff}.wrap{width:min(1120px,94%);margin:24px auto}.card{background:white;border-radius:14px;padding:18px;margin-bottom:18px;box-shadow:0 4px 16px #0001}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}.btn{display:inline-block;background:#111827;color:white;border:0;border-radius:9px;padding:10px 15px;text-decoration:none;cursor:pointer}.btn.secondary{background:#e5e7eb;color:#111827}.btn.success{background:#047857}.btn.danger{background:#b91c1c}.field{margin-bottom:12px}.field label{display:block;font-weight:600;margin-bottom:5px}.field input,.field select,.field textarea{width:100%;padding:11px;border:1px solid #d1d5db;border-radius:8px}.alert{padding:12px;border-radius:8px;margin-bottom:14px}.success{background:#d1fae5}.error{background:#fee2e2}.stat{font-size:1.7rem;font-weight:700}.muted{color:#6b7280}.badge{display:inline-block;padding:5px 8px;border-radius:99px;background:#e5e7eb;font-size:.82rem}.nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.nav a{padding:8px 11px;background:white;border-radius:8px;text-decoration:none;color:#111827}.course{display:flex;justify-content:space-between;gap:16px}.locked{opacity:.55}table{width:100%;border-collapse:collapse;background:white}th,td{padding:10px;border-bottom:1px solid #e5e7eb;text-align:left}footer{text-align:center;padding:30px;color:#6b7280}@media(max-width:640px){.course{display:block}.top{font-size:14px}}