:root{color-scheme:light;--paper:#f6f3eb;--card:#fffefa;--ink:#172a3a;--muted:#61717a;--line:#d9d9ce;--teal:#477d78;--teal-dark:#315e5a;--error:#a34f3e;--ok:#316e56;--soft:#e9eee9;--shadow:0 8px 24px #172a3a0b;font-family:system-ui,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif}
:root[data-theme=dark]{color-scheme:dark;--paper:#17232b;--card:#202f38;--ink:#edf1e9;--muted:#b2c0c1;--line:#405158;--teal:#83b8ae;--teal-dark:#a2cdc5;--error:#e49a89;--ok:#96c7a3;--soft:#2a3d43;--shadow:0 8px 24px #0003}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-size:17px;line-height:1.6}button,input,textarea,select{font:inherit;color:inherit}button,select,input[type=text],input[type=number],textarea{min-height:44px}a{color:inherit}.skip-link{position:absolute;top:-100px;left:12px;background:var(--card);padding:12px;z-index:5}.skip-link:focus{top:12px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--teal);outline-offset:3px}
.site-header{max-width:1200px;margin:auto;padding:20px 28px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;text-decoration:none;align-items:center;font-weight:700}.brand small{display:block;font-size:10px;letter-spacing:.12em;color:var(--muted);font-weight:500}.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:var(--ink);color:var(--paper);border-radius:50%;font:600 13px ui-monospace,monospace}.header-tools{display:flex;align-items:center;gap:9px}.header-tools select{border:1px solid var(--line);border-radius:8px;background:var(--card);padding:6px 10px}.save-status{font-size:13px;color:var(--muted);margin-right:6px}
main{max-width:1120px;margin:0 auto;padding:48px 28px 80px}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--teal-dark);font-weight:700;margin:0 0 8px}.page-title{font-size:clamp(28px,4vw,40px);line-height:1.2;letter-spacing:-.035em;margin:0 0 12px}.lede{color:var(--muted);margin:0 0 30px}.section-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:32px 0 14px}.section-row h2{margin:0;font-size:20px}.round-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.round-card,.panel,.question-card,.review-card,.practice-card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.round-card{padding:20px;display:flex;align-items:center;gap:18px}.round-no{font:600 14px ui-monospace,monospace;color:var(--teal-dark);min-width:42px}.round-copy{flex:1;min-width:0}.round-copy h3{font-size:17px;margin:0 0 3px}.round-copy p{font-size:14px;color:var(--muted);margin:0}.round-card .button{flex:none}.button{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:9px;border:1px solid transparent;padding:9px 16px;min-height:44px;cursor:pointer;font-weight:650}.primary{background:var(--ink);color:var(--paper)}.primary:hover{opacity:.88}.secondary{border-color:var(--line);background:var(--card)}.text-button{background:none;border:0;color:var(--teal-dark);text-decoration:underline;cursor:pointer;min-height:44px;padding:6px}.button-row{display:flex;gap:10px;flex-wrap:wrap}.stats{display:flex;gap:10px;flex-wrap:wrap}.chip{border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:13px;color:var(--muted)}.empty{padding:24px;border:1px dashed var(--line);border-radius:12px;color:var(--muted)}
.exam-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.exam-title{margin:0;font-size:23px}.progress-wrap{margin-bottom:22px}.progress-label{display:flex;justify-content:space-between;color:var(--muted);font-size:14px;margin-bottom:7px}.progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden}.progress span{display:block;height:100%;background:var(--teal);border-radius:inherit}.exam-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:20px;align-items:start}.question-card{padding:clamp(20px,4vw,34px);min-height:360px}.q-meta{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:18px}.q-number{font:600 13px ui-monospace,monospace;color:var(--teal-dark)}.question-prompt{font-size:21px;line-height:1.55;margin:0 0 20px;white-space:pre-line}.figure{margin:20px 0;padding:12px;overflow:auto;border:1px solid var(--line);border-radius:10px;background:var(--paper)}.figure svg{display:block;max-width:100%;height:auto;min-width:min(100%,440px)}.fig-label{font:12px system-ui;fill:var(--ink)}.fig-value{font:11px ui-monospace;fill:var(--ink)}.answer-area{margin-top:20px}.answer-area input[type=text],.answer-area input[type=number],.answer-area textarea{width:100%;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px 12px}.answer-area textarea{min-height:120px;resize:vertical}.choices{border:0;padding:0;margin:0;display:grid;gap:9px}.choices legend{font-weight:650;margin-bottom:10px}.choice{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);border-radius:9px;padding:10px 12px;cursor:pointer}.choice:has(input:checked){border-color:var(--teal);background:var(--soft)}.choice input{width:20px;height:20px;accent-color:var(--teal);flex:none;margin:2px 0 0}.process-label{display:block;margin:14px 0 5px;font-weight:650}.exam-nav{padding:17px;background:var(--card);border:1px solid var(--line);border-radius:12px}.exam-nav h2{font-size:15px;margin:0 0 12px}.jump-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.jump{min-height:42px;border:1px solid var(--line);border-radius:8px;background:var(--card);cursor:pointer}.jump.current{outline:2px solid var(--teal);outline-offset:1px}.jump.answered{background:var(--soft);border-color:var(--teal)}.jump.incorrect{border-color:var(--error)}.nav-legend{font-size:12px;color:var(--muted);margin:12px 0 0}.exam-controls{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:18px}.submit-hint{color:var(--muted);font-size:13px;margin:12px 0}
.panel{padding:20px;margin:20px 0}.panel h2,.panel h3{margin:0 0 10px}.review-card{padding:22px;margin:14px 0}.review-card h3{margin:0 0 8px;font-size:18px}.review-result{font-weight:700}.review-result.good{color:var(--ok)}.review-result.bad{color:var(--error)}.explanation{padding:12px 14px;margin-top:12px;background:var(--soft);white-space:pre-line}.source{color:var(--muted);font-size:13px;margin-top:12px}.rubric-list{list-style:none;padding:0;margin:12px 0}.rubric-list label{display:flex;align-items:flex-start;gap:10px;padding:7px 0}.rubric-list input{width:20px;height:20px;accent-color:var(--teal);flex:none;margin:3px 0 0}.self-score{font-weight:700;color:var(--teal-dark)}.practice-card{padding:20px;margin:12px 0}.practice-card p{white-space:pre-line}.notice{padding:12px 14px;border-radius:9px;background:var(--soft);color:var(--muted)}.dialog-card{padding:26px;background:var(--card);color:var(--ink);border:0;min-width:min(90vw,480px)}dialog{padding:0;border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);box-shadow:0 18px 70px #0004}dialog::backdrop{background:#0e1b22a6}dialog h2{margin:0 0 10px}.muted{color:var(--muted)}.score-big{font-size:28px;font-weight:750;letter-spacing:-.03em}
@media(max-width:760px){.site-header{padding:14px 16px;align-items:flex-start}.header-tools{gap:5px;flex-wrap:wrap;justify-content:flex-end}.save-status{width:100%;text-align:right;order:2}.theme-label{font-size:13px}.brand small{font-size:9px}main{padding:30px 16px 56px}.round-grid{grid-template-columns:1fr}.round-card{padding:16px;gap:10px}.round-card .button{padding:8px 11px}.exam-layout{grid-template-columns:1fr}.exam-nav{order:2}.jump-grid{grid-template-columns:repeat(10,minmax(0,1fr))}.exam-nav h2{margin-bottom:9px}.question-card{min-height:0}.question-prompt{font-size:19px}.exam-top{align-items:flex-start}.exam-controls .button{flex:1}.exam-controls{flex-wrap:wrap}.exam-controls .muted{width:100%;text-align:center;order:3}}
@media(max-width:380px){.brand{gap:8px;font-size:15px}.brand-mark{width:36px;height:36px}.site-header{padding-inline:12px}.header-tools select{max-width:95px;padding-inline:5px}main{padding-inline:12px}.jump-grid{gap:4px}.jump{min-height:38px;font-size:14px}.round-card{gap:7px}.round-no{min-width:34px}}