:root{--bg:#f5f7fb;--surface:#fff;--surface2:#f8fafc;--text:#172033;--muted:#667085;--line:#e4e7ec;--primary:#ff9900;--primary2:#232f3e;--success:#067647;--successbg:#ecfdf3;--danger:#b42318;--dangerbg:#fef3f2;--shadow:0 14px 40px rgba(16,24,40,.08);--radius:18px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit}.shell{max-width:1180px;margin:auto;padding:0 22px}.topbar{background:var(--primary2);color:#fff;position:sticky;top:0;z-index:10;box-shadow:0 2px 10px rgba(0,0,0,.12)}.topbar .shell{height:68px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:12px;align-items:center;font-weight:800;font-size:18px;text-decoration:none}.brand-badge{width:36px;height:36px;border-radius:10px;background:var(--primary);display:grid;place-items:center;color:#111;font-weight:900}.small{font-size:13px;color:var(--muted)}.hero{padding:58px 0 34px}.hero h1{font-size:clamp(32px,5vw,54px);line-height:1.06;letter-spacing:-.04em;margin:0 0 16px}.hero p{max-width:760px;color:var(--muted);font-size:18px}.pill{display:inline-flex;gap:8px;align-items:center;background:#fff7ed;color:#9a3412;padding:7px 11px;border-radius:999px;font-weight:700;font-size:12px;border:1px solid #fed7aa}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;padding-bottom:54px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.exam-card{display:flex;flex-direction:column;min-height:215px}.exam-card h3{font-size:20px;margin:10px 0 8px}.exam-card .meta{color:var(--muted);margin-bottom:20px}.btn{appearance:none;border:0;border-radius:12px;padding:12px 16px;background:var(--primary2);color:#fff;text-decoration:none;font-weight:800;cursor:pointer;display:inline-flex;justify-content:center;align-items:center;gap:8px}.btn:hover{filter:brightness(1.05)}.btn.primary{background:var(--primary);color:#111}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}.actions{display:flex;gap:10px;margin-top:auto}.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;padding:34px 0 60px}.question-card{padding:28px}.progress{height:8px;background:#eaecf0;border-radius:999px;overflow:hidden;margin:14px 0 22px}.progress>span{display:block;height:100%;background:var(--primary);border-radius:999px}.qtop{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.qtop h1{font-size:23px;line-height:1.35;margin:8px 0 20px}.choice{display:block;border:1px solid var(--line);border-radius:14px;padding:15px 16px;margin:11px 0;cursor:pointer;background:#fff;transition:.15s}.choice:hover{border-color:#98a2b3;transform:translateY(-1px)}.choice input{margin-right:10px;accent-color:var(--primary)}.choice.correct{border-color:#6ce9a6;background:var(--successbg)}.choice.wrong{border-color:#fda29b;background:var(--dangerbg)}.feedback{border-radius:14px;padding:16px;margin:18px 0}.feedback.ok{background:var(--successbg);color:var(--success)}.feedback.no{background:var(--dangerbg);color:var(--danger)}.note{border-left:4px solid var(--primary);padding:12px 14px;background:#fffbeb;border-radius:0 12px 12px 0;color:#7a2e0e;margin-top:16px}.side .card{position:sticky;top:90px}.stat{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line)}.stat:last-child{border-bottom:0}.result-score{font-size:56px;font-weight:900;letter-spacing:-.05em}.result-list{display:grid;gap:12px;margin-top:20px}.result-item{padding:16px;border:1px solid var(--line);border-radius:14px}.result-item.ok{border-left:5px solid #12b76a}.result-item.no{border-left:5px solid #f04438}.footer{color:var(--muted);padding:30px 0 50px;text-align:center}.notice{background:#eff8ff;border:1px solid #b2ddff;padding:14px 16px;border-radius:12px;color:#175cd3;margin:16px 0}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.kbd{font-family:ui-monospace,monospace;background:#f2f4f7;border:1px solid #d0d5dd;border-bottom-width:2px;border-radius:6px;padding:2px 6px;font-size:12px}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.practice-layout{grid-template-columns:1fr}.side .card{position:static}}@media(max-width:620px){.grid{grid-template-columns:1fr}.shell{padding:0 14px}.hero{padding-top:34px}.question-card{padding:20px}.topbar .small{display:none}.actions{flex-direction:column}.btn{width:100%}}