:root{--green:#0f6b3a;--green2:#14864a;--gold:#d5a92d;--bg:#f4f7f5;--red:#d84747;--yellow:#e6a817;--blue:#2f73d9;--text:#1f2a24;--muted:#66736b;--card:#fff;--line:#dfe7e2}
*{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)}a{color:var(--green);text-decoration:none}.topbar{height:66px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--green)}.brand img{height:46px;width:58px;object-fit:contain}.userbox{display:flex;gap:14px;align-items:center;font-size:14px}.container{max-width:1180px;margin:24px auto;padding:0 16px}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:0 4px 18px rgba(20,50,30,.04);margin-bottom:16px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.stat{font-size:28px;font-weight:800;color:var(--green)}.muted{color:var(--muted);font-size:13px}.btn,button{border:0;border-radius:9px;padding:10px 14px;font-weight:700;cursor:pointer}.btn-primary,button{background:var(--green);color:#fff}.btn-secondary{background:#eef3f0;color:var(--text)}.btn-danger{background:var(--red);color:#fff}.btn-warning{background:var(--yellow);color:#fff}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}input,select,textarea{width:100%;padding:10px 11px;border:1px solid #ccd8d0;border-radius:9px;background:#fff;font:inherit}label{font-weight:650;font-size:14px;display:block;margin:10px 0 6px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;background:#fff}th,td{padding:10px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}th{background:#f0f5f2}.badge{display:inline-block;padding:4px 8px;border-radius:999px;font-size:12px;font-weight:700}.ok{background:#dff3e7;color:#17653b}.warn{background:#fff0c8;color:#835d00}.bad{background:#fde1e1;color:#9b2525}.nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.nav a{padding:9px 12px;background:#fff;border:1px solid var(--line);border-radius:9px}.login-wrap{max-width:430px;margin:7vh auto}.login-logo{display:block;height:140px;margin:auto;object-fit:contain}.exam-shell{display:grid;grid-template-columns:1fr 300px;gap:18px}.timer{font-size:42px;font-weight:900;letter-spacing:1px;color:var(--green);font-variant-numeric:tabular-nums}.question{font-size:18px;line-height:1.55}.option{display:block;border:1px solid var(--line);border-radius:10px;padding:12px;margin:8px 0;background:#fff;cursor:pointer}.option:hover{border-color:var(--green)}.qnav{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.qnum{height:38px;border-radius:8px;border:0;color:#fff;font-weight:800}.q-blank{background:var(--red)}.q-skip{background:var(--yellow)}.q-answered{background:var(--green2)}.q-active{background:var(--blue);outline:3px solid #b7cdf4}.media img,.media video{max-width:100%;max-height:430px;border-radius:10px}.media audio{width:100%}.alert{padding:11px 13px;border-radius:9px;margin:10px 0;background:#e9f3ff;color:#214e86}.alert-danger{background:#fde8e8;color:#9d2727}.center{text-align:center}.score{font-size:64px;font-weight:900;color:var(--green)}
@media(max-width:850px){.grid{grid-template-columns:1fr 1fr}.exam-shell{grid-template-columns:1fr}.qnav{grid-template-columns:repeat(10,1fr)}}
@media(max-width:560px){.grid,.form-grid{grid-template-columns:1fr}.topbar{padding:0 10px}.userbox span{display:none}.timer{font-size:30px}.qnav{grid-template-columns:repeat(5,1fr)}}