:root{--ink:#101828;--muted:#667085;--line:#d0d5dd;--paper:#fff;--bg:#f2f4f7;--brand:#6536e8;--brand2:#9b6cff;--ok:#067647;--okbg:#ecfdf3;--bad:#b42318;--badbg:#fef3f2}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Pretendard,"Noto Sans KR",system-ui,sans-serif;font-size:16px;line-height:1.55}button{font:inherit}.shell{max-width:760px;margin:auto;min-height:100vh;background:var(--paper)}header{padding:14px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fffc;backdrop-filter:blur(12px);z-index:3}.close,.back{border:0;background:none;color:var(--muted);font-weight:800;padding:4px 0 10px}.close{font-size:1.6rem;line-height:1}.eyebrow{font-size:.75rem;font-weight:900;letter-spacing:.04em;color:var(--brand)}.topline{display:flex;justify-content:space-between;gap:12px;align-items:end}h1{font-size:1.18rem;line-height:1.35;margin:4px 0 0}h2{font-size:1.08rem;margin:24px 0 12px}.score{white-space:nowrap;font-weight:900}.bar{height:7px;background:#eaecf0;border-radius:99px;overflow:hidden;margin-top:12px}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:width .25s}.content{padding:28px 20px 110px}.question{font-size:1.2rem;font-weight:800;line-height:1.65;margin:0 0 22px}.choices{display:grid;gap:10px}.choice{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:14px;padding:15px 16px;display:flex;gap:10px;color:var(--ink)}.choice:hover{border-color:#9b8afb;background:#faf9ff}.choice:disabled{cursor:default}.choice.correct{border:2px solid var(--ok);background:var(--okbg)}.choice.wrong{border:2px solid var(--bad);background:var(--badbg)}.num{font-weight:900}.hintbtn{margin:18px 0 0;border:0;background:none;color:var(--brand);font-weight:900;padding:8px 0}.hint{background:#f9fafb;border-left:4px solid #98a2b3;padding:12px 14px;margin-top:6px}.feedback{margin-top:20px;border-radius:16px;padding:18px}.feedback.ok{background:var(--okbg);color:#054f31}.feedback.bad{background:var(--badbg);color:#7a271a}.feedback h2{margin:0 0 8px}.feedback p{margin:7px 0}.feedback summary{font-weight:800;cursor:pointer}.feedback ul{padding-left:20px}.next{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(760px,100%);padding:14px 20px calc(14px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line)}.primary{width:100%;border:0;border-radius:13px;background:var(--ink);color:#fff;font-weight:900;padding:15px}.home{padding:24px 20px 60px}.hero{background:linear-gradient(145deg,#171126,#43239a);color:#fff;border-radius:24px;padding:30px 22px;margin-bottom:22px}.brand{display:inline-block;background:#ffffff1c;border:1px solid #ffffff30;border-radius:99px;padding:4px 10px;font-size:.78rem;font-weight:900}.hero h1{font-size:1.8rem;margin:14px 0 4px}.hero p{margin:0;color:#ddd6fe}.subjects{display:grid;grid-template-columns:1fr 1fr;gap:12px}.subjects button{text-align:left;border:1px solid var(--line);background:#fff;border-radius:18px;padding:20px 16px;color:var(--ink)}.subjects b{display:block;font-size:1.18rem}.subjects span{display:block;color:var(--muted);font-size:.84rem;margin-top:6px}.today{margin-top:20px;background:#f5f3ff;border-radius:16px;padding:16px;color:#3d247d}.today p{margin:6px 0 0}.subject-title{padding:14px 0 18px}.subject-title span{font-size:.75rem;color:var(--brand);font-weight:900;letter-spacing:.08em}.subject-title h1{font-size:1.8rem}.subject-title p{color:var(--muted);margin:6px 0}.sets{display:grid;gap:11px}.set{display:block;text-decoration:none;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:15px;padding:16px}.set.focus{border-color:#b8a5ff;background:#faf9ff}.set strong{display:block;margin-bottom:4px}.set span{font-size:.86rem;color:var(--muted)}.result{text-align:center}.ring{width:150px;height:150px;border-radius:50%;margin:20px auto;display:grid;place-items:center;background:conic-gradient(var(--brand) var(--p),#eaecf0 0);position:relative}.ring:after{content:"";position:absolute;width:118px;height:118px;border-radius:50%;background:#fff}.ring b{z-index:1;font-size:1.8rem}.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:20px 0}.stats div{background:#f9fafb;padding:14px;border-radius:12px}.stats b{display:block;font-size:1.3rem}.result-copy{color:var(--muted)}.actions{display:grid;gap:10px;margin-top:20px}.secondary{width:100%;border:1px solid var(--line);background:#fff;border-radius:13px;padding:14px;font-weight:800}@media(max-width:420px){.question{font-size:1.1rem}.choice{padding:14px}.hero h1{font-size:1.5rem}.subjects{grid-template-columns:1fr}}