:root{--ink:#182337;--muted:#52647a;--line:#dae3e9;--accent:#126c63;--bg:#f3f6f6}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Pretendard,"Noto Sans KR",system-ui,sans-serif;line-height:1.65}a{color:var(--accent);text-underline-offset:4px}header{max-width:1180px;margin:auto;padding:22px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:750}.brand b{background:var(--accent);color:white;border-radius:12px;padding:8px 12px}nav{display:flex;align-items:center;flex-wrap:wrap;gap:18px;font-size:13px}nav a{text-decoration:none}main{max-width:1120px;margin:auto;padding:0 28px 60px}.hero{padding:54px 0 30px}.eyebrow{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.16em}h1{font-size:clamp(32px,5vw,52px);letter-spacing:-.045em;line-height:1.18;margin:16px 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4px;overflow-wrap:anywhere}.actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px}.card.done{border-color:#47978e;background:#f5fbf9}.check{display:flex;align-items:flex-start;gap:9px;margin:10px 0;font-size:14px}.check input{width:18px;height:18px;flex-shrink:0;margin-top:3px;accent-color:var(--accent)}.exam-bar{position:sticky;top:65px;background:#182f39;color:white;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;border-radius:12px;z-index:1;margin-bottom:18px}.timer{font-variant-numeric:tabular-nums;font-size:22px;font-weight:800}.options{display:grid;gap:10px;margin-top:18px}.option{padding:11px 14px;border:1px solid var(--line);border-radius:9px;display:flex;gap:10px;align-items:flex-start;cursor:pointer;font-size:14px}.option:has(input:checked){border-color:var(--accent);background:#edf7f3}.option input{margin-top:5px;accent-color:var(--accent)}.prompt{white-space:pre-wrap;font-size:14px;overflow-wrap:anywhere}.editor{width:100%;min-height:220px;resize:vertical;border:1px solid #b9cad4;border-radius:10px;padding:15px;background:#f8fafc;color:#182337;font:14px/1.7 Consolas,monospace;tab-size:4}.answer{white-space:pre-wrap;overflow-wrap:anywhere;background:#eff4f5;padding:18px;border-radius:9px;font-size:13px;line-height:1.8;margin-top:12px}.answer.code{font-family:Consolas,monospace;overflow-x:auto}.good{color:#146858}.bad{color:#af3440}.question.wrong{border-color:#dda4a7}.score{font-size:42px;font-weight:850;line-height:1.2;margin:12px 0}.score small{font-size:16px;color:var(--muted)}.result-line{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:12px 0}.result-line:last-child{border:0}.result-line span{color:var(--muted);font-size:13px}.rubric{margin-top:18px;border-top:1px solid var(--line);padding-top:12px}.hint{font-size:13px;color:var(--muted)}.storage-note,footer{font-size:12px;color:var(--muted)}footer{padding:24px;text-align:center;border-top:1px solid var(--line)}details{margin:12px 0}summary{cursor:pointer;font-size:14px;font-weight:700}#status{font-size:13px;color:#af3440}@media(max-width:700px){header{align-items:flex-start;padding:16px;flex-direction:column}main{padding:0 16px 36px}.hero{padding-top:34px}.grid{grid-template-columns:1fr}.tabs{top:0}.tabs button{font-size:12px;padding:9px 10px;flex:1;min-width:135px}.exam-bar{top:108px;padding:12px;flex-wrap:wrap}.card,.question,.result{padding:18px}.stats{gap:8px}.stats>div{min-width:125px;padding:10px 12px}nav{gap:13px}.editor{font-size:14px}.result-line{flex-direction:column;gap:2px}}

.drill-controls{margin-bottom:16px}.drill-controls label{display:flex;align-items:center;gap:8px;max-width:100%;min-width:0}.drill-controls select{font:inherit;padding:9px;border:1px solid var(--line);border-radius:9px;max-width:400px;min-width:0;width:100%;background:white}.drill-controls button[aria-pressed="true"]{background:var(--accent);color:white}.drill-controls select:focus-visible{outline:3px solid #4c9ed4;outline-offset:3px}.editor[readonly]{background:#edf2f5}@media(max-width:700px){.drill-controls label{width:100%}.drill-controls select{max-width:100%}}

/* Keep large supplied numeric arrays out of the question reading flow. */
.provided-reference .provided-data-code{max-height:320px;overflow:auto;white-space:pre;overscroll-behavior:contain}