:root{--primary:#1d4e89;--ink:#1a1a1a;--muted:#5f6b7a;--line:#e3e8ee;--bg:#f7f9fb;--card:#ffffff;--ok:#1e7e34;--warn:#b7791f;--bad:#c0392b}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;font-size:16px}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.topbar{background:var(--primary);color:#fff;padding:0 20px}.topbar-inner{max-width:1000px;margin:0 auto;display:flex;align-items:center;gap:20px;min-height:56px}.brand{color:#fff;font-weight:700;font-size:1.1rem}.brand:hover{text-decoration:none}.nav{display:flex;gap:16px;margin-left:8px}.nav a{color:rgba(255,255,255,.88);font-size:.95rem}.nav a:hover{color:#fff}.nav-spacer{flex:1 1}.userbox{display:flex;align-items:center;gap:12px;font-size:.9rem;color:rgba(255,255,255,.9)}.userbox button.linklike{background:none;border:none;color:#fff;cursor:pointer;font-size:.9rem;text-decoration:underline;padding:0}.wrap{max-width:1000px;margin:0 auto;padding:28px 20px 60px}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:20px 22px;margin-bottom:16px}.card h2,.card h3{margin-top:0}h1{font-size:1.7rem;margin:0 0 16px}h2{font-size:1.25rem}.muted{color:var(--muted)}.small{font-size:.88rem}.btn{display:inline-block;border:1px solid var(--primary);background:var(--primary);color:#fff;padding:9px 18px;border-radius:8px;font-size:.95rem;cursor:pointer}.btn:hover{text-decoration:none;filter:brightness(1.07)}.btn.secondary{background:#fff;color:var(--primary)}.btn.danger{background:var(--bad);border-color:var(--bad)}.btn:disabled{opacity:.55;cursor:default}.field{margin-bottom:14px}.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.93rem}.field input[type=email],.field input[type=number],.field input[type=password],.field input[type=text],.field input[type=url],.field select,.field textarea{width:100%;padding:9px 12px;font-size:1rem;border:1px solid #c9d2dc;border-radius:8px;background:#fff;color:var(--ink)}.field textarea{min-height:110px;resize:vertical}.field .hint{font-size:.85rem;color:var(--muted);margin-top:4px}.table{width:100%;border-collapse:collapse;font-size:.95rem}.table td,.table th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}.table th{color:var(--muted);font-weight:600;font-size:.85rem;text-transform:uppercase;letter-spacing:.03em}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.8rem;font-weight:600;background:#eef2f6;color:#3c4a5a;border:1px solid var(--line)}.badge.ok{background:#e6f4ea;color:var(--ok);border-color:#bfe3c9}.badge.warn{background:#fdf3e3;color:var(--warn);border-color:#f0dcae}.badge.bad{background:#fbe9e7;color:var(--bad);border-color:#f2c4bf}.badge.info{background:#e7eff9;color:var(--primary);border-color:#c3d7ee}.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:.95rem}.alert.error{background:#fdecea;border:1px solid #f5c6c0;color:#8e2f24}.alert.ok{background:#e8f5ec;border:1px solid #bfe3c9;color:#1c5b2a}.grid2{display:grid;grid-template-columns:1fr 1fr;grid-gap:16px;gap:16px}@media (max-width:700px){.grid2{grid-template-columns:1fr}.nav{display:none}}.lesson-block{margin-bottom:18px}.lesson-block.video iframe,.lesson-block.video video{width:100%;aspect-ratio:16/9;border-radius:8px;border:1px solid var(--line)}.quiz-q{border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin-bottom:12px;background:#fff}.quiz-q p{font-weight:600;margin:0 0 8px}.quiz-q label{display:block;padding:6px 0;cursor:pointer}.cert{border:2px solid var(--primary);border-radius:12px;padding:40px;text-align:center;background:#fff;max-width:640px;margin:0 auto}.cert h1{font-size:2rem;margin-bottom:4px}.cert .code{font-family:ui-monospace,monospace;font-size:1.2rem;letter-spacing:.08em}.row-actions{display:flex;gap:8px;align-items:center}.inline-form{display:inline}.progress{height:8px;background:#e8edf2;border-radius:999px;overflow:hidden}.progress>div{height:100%;background:var(--primary)}.footer{text-align:center;color:var(--muted);font-size:.85rem;padding:24px}