:root{--navy:#0b2545;--teal:#13838f;--gold:#f2a541;--bg:#f6f8fb;--line:#dde3ea;--red:#c0392b;--green:#1e8449}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:#1b2430;line-height:1.5}
a{color:var(--teal)}main{max-width:1080px;margin:0 auto;padding:24px 20px 60px}
.top{background:var(--navy);color:#fff;display:flex;justify-content:space-between;align-items:center;padding:12px 24px}
.top nav{display:flex;gap:18px;align-items:center}.top a{color:#fff;text-decoration:none}.brand{font-weight:800;font-size:22px}.brand span{color:var(--gold)}
.btn,button{background:var(--teal);color:#fff;border:0;border-radius:6px;padding:10px 18px;font-size:15px;cursor:pointer;text-decoration:none;display:inline-block}
.btn.small{padding:6px 12px}.btn.gold{background:var(--gold);color:var(--navy)}.btn.red,button.red{background:var(--red)}button.link{background:none;padding:0;color:#fff;text-decoration:underline}
.inline{display:inline}.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin:14px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}.muted{color:#6b7785;font-size:14px}
.tag{display:inline-block;font-size:12px;padding:2px 8px;border-radius:10px;background:#e8f4f5;color:var(--teal);margin-left:6px}.tag.lock{background:#f3f0e8;color:#8a6d1d}.tag.red{background:#fdecea;color:var(--red)}.tag.green{background:#e9f7ef;color:var(--green)}
table{width:100%;border-collapse:collapse;background:#fff}td,th{border-bottom:1px solid var(--line);padding:8px;text-align:left;font-size:14px;vertical-align:top}
input[type=email],input[type=text],select,textarea{padding:9px;border:1px solid var(--line);border-radius:6px;font-size:15px;width:100%;max-width:420px}
.lessons li{padding:6px 0;border-bottom:1px solid var(--line);list-style:none}.lessons{padding:0}
video{width:100%;border-radius:8px;background:#000}.flash{background:#fff7e6;border:1px solid var(--gold);padding:10px 14px;border-radius:6px}
.exam-bar{position:sticky;top:0;background:var(--navy);color:#fff;padding:10px 16px;border-radius:8px;display:flex;justify-content:space-between;align-items:center;z-index:5}
.timer{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums}.timer.low{color:var(--gold)}
.q{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px 18px;margin:12px 0}.q label{display:block;padding:6px 8px;border-radius:6px;cursor:pointer}.q label:hover{background:#f0f6f7}
.q.right{border-left:5px solid var(--green)}.q.wrong{border-left:5px solid var(--red)}.correct{background:#e9f7ef}.chosen-wrong{background:#fdecea}
.terms{max-height:380px;overflow:auto;background:#fff;border:1px solid var(--line);padding:14px;white-space:pre-wrap;font-size:13px}
footer{text-align:center;padding:20px;border-top:1px solid var(--line);font-size:13px}
.quiz .q{margin:14px 0;padding-bottom:8px;border-bottom:1px solid #eee}.quiz .opt{display:block;padding:6px 8px;border-radius:6px;cursor:pointer}
.quiz .opt:hover{background:#f4f6fa}.quiz .opt.right{background:#e6f6ea}.quiz .opt.wrong{background:#fde8e8}.quiz .ok{color:#1b7a3a}.quiz .bad{color:#b42318}