:root{--bg:#f7f8fb;--surface:#fff;--text:#18212f;--muted:#667085;--border:#e6e8ec;--primary:#2457d6;--primary-dark:#183e9e;--danger:#b42318;--radius:16px;--shadow:0 8px 28px #1018280f}*{box-sizing:border-box}html{background:var(--bg)}body{color:var(--text);background:var(--bg);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.shell{max-width:1120px;margin:0 auto;padding:28px 20px 64px}.topbar{border:1px solid var(--border);box-shadow:var(--shadow);z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#fffffff0;border-radius:18px;justify-content:space-between;align-items:center;gap:16px;padding:14px 18px;display:flex;position:sticky;top:12px}.brand{letter-spacing:-.02em;align-items:center;gap:12px;font-weight:800;display:flex}.brandMark{width:38px;height:38px;color:var(--primary);background:#eef3ff;border-radius:12px;place-items:center;font-weight:900;display:grid}.nav{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.nav a,.nav button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:10px;padding:9px 11px}.nav a:hover,.nav button:hover{color:var(--text);background:#f2f4f7}.hero{margin:46px 0 24px}.eyebrow{color:var(--primary);text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;font-weight:750}h1{letter-spacing:-.045em;margin:8px 0 12px;font-size:clamp(2rem,5vw,3.2rem);line-height:1.03}h2{letter-spacing:-.02em;margin:0 0 12px;font-size:1.3rem}p{line-height:1.55}.muted{color:var(--muted)}.grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.subjectHead{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.subjectBadge{color:#fff;border-radius:11px;place-items:center;min-width:46px;height:38px;padding:0 10px;font-size:.78rem;font-weight:800;display:grid}.progress{background:#eef0f3;border-radius:99px;height:9px;overflow:hidden}.progress>span{border-radius:99px;height:100%;display:block}.stats{color:var(--muted);gap:18px;margin:14px 0 4px;font-size:.88rem;display:flex}.stats strong{color:var(--text);font-size:1.08rem;display:block}.actions{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.button{background:var(--primary);color:#fff;cursor:pointer;border:1px solid #0000;border-radius:11px;justify-content:center;align-items:center;gap:8px;padding:11px 15px;font-weight:750;display:inline-flex}.button:hover{background:var(--primary-dark)}.button.secondary{color:var(--text);border-color:var(--border);background:#fff}.button.secondary:hover{background:#f8fafc}.panel{max-width:760px;margin:42px auto 0}.form{gap:14px;display:grid}label{gap:7px;font-weight:650;display:grid}input,select{background:#fff;border:1px solid #d7dce2;border-radius:11px;outline:none;width:100%;padding:11px 12px}input:focus,select:focus{border-color:#7aa2ff;box-shadow:0 0 0 3px #2457d61f}.practice{max-width:820px;margin:38px auto 0}.questionMeta{color:var(--muted);margin-bottom:8px;font-size:.87rem}.question{margin:0 0 22px;font-size:1.45rem;line-height:1.35}.optionList{gap:9px;display:grid}.option{text-align:left;border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:11px;padding:12px 14px}.option.selected{border-color:var(--primary);background:#eef3ff}.feedback{border-radius:12px;margin-top:16px;padding:14px 16px}.feedback.good{color:#166534;background:#ecfdf3}.feedback.bad{color:#991b1b;background:#fff1f0}.kicker{color:var(--muted);margin-bottom:6px;font-size:.84rem}.bigNumber{letter-spacing:-.04em;font-size:2rem;font-weight:850}.empty{text-align:center;padding:42px 20px}.footerNote{color:var(--muted);margin-top:30px;font-size:.85rem}.stack{gap:12px;display:grid}.userRow{border-bottom:1px solid var(--border);justify-content:space-between;gap:12px;padding:11px 0;display:flex}@media (max-width:820px){.grid{grid-template-columns:1fr}.topbar{align-items:flex-start;position:static}.stats{flex-wrap:wrap}}