@charset "UTF-8";
:root{--ink:#213d38;--muted:#65766d;--green:#164c43;--mint:#e8f1e8;--paper:#f7f7ef;--line:#dce1d5;--orange:#b35835;--white:#fff;--serif:"Hiragino Mincho ProN","Yu Mincho",serif;font-family:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;color:var(--ink);background:var(--paper);font-size:15px;line-height:1.7}
*{box-sizing:border-box}body{margin:0}a{color:var(--green);text-underline-offset:4px}button,a,input,select{touch-action:manipulation}button,input,select{font:inherit}button{cursor:pointer;background:white;border:1px solid var(--line);border-radius:8px;color:var(--ink);padding:10px 16px;min-height:44px}button:hover{border-color:var(--green);background:#f0f4eb}button:disabled{cursor:default;opacity:.6}button.primary,.primary{background:var(--green);color:white;border-color:var(--green)}button.primary:hover{background:#236357}button.danger{color:#a32929;border-color:#d6a4a4}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #cc742d;outline-offset:4px}header{max-width:1200px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:24px 38px;border-bottom:1px solid var(--line);gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:750;letter-spacing:.06em;font-size:21px}.brand small{display:block;font:9px system-ui;letter-spacing:.2em;color:var(--muted)}.mark{display:grid;place-items:center;width:42px;height:42px;background:var(--green);color:white;font-family:var(--serif);font-size:23px;border-radius:12px}nav{display:flex;gap:28px;font-size:13px}nav a{text-decoration:none}main{max-width:1124px;margin:0 auto;padding:42px 0 64px;min-height:70vh}h1,h2,h3,p{margin-top:0}h1{font-family:var(--serif);font-weight:600;font-size:48px;letter-spacing:.02em;line-height:1.5}h2{font-size:25px;font-weight:650;line-height:1.5}h3{font-size:18px;line-height:1.5}.eyebrow{font-size:11px;letter-spacing:.18em;font-weight:700;color:var(--green);margin-bottom:12px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center;margin-bottom:34px}.hero p{color:var(--muted);max-width:500px}.hero h1{margin-bottom:18px}.hero h1 span{color:var(--green)}.study-note{padding:26px 30px;background:var(--mint);border-radius:16px;border:1px solid #d8e3d3;position:relative}.study-note .big{font-family:var(--serif);font-size:28px;color:var(--ink);margin-bottom:16px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;border-top:1px solid #cbd8c8;padding-top:20px}.steps small{display:block;font-size:10px;color:var(--muted)}.steps strong{font-size:14px}.tag{display:inline-block;border-radius:5px;padding:3px 8px;background:var(--mint);font-size:11px;color:var(--green);font-weight:600}.muted{color:var(--muted)}.small{font-size:12px}.notice{border-left:3px solid #ccaa60;background:#f1eedf;padding:12px 16px;font-size:12px;color:#756743;margin:26px 0}.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:32px 0 18px}.section-head h2{margin:0}.cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}.exam-card{display:block;background:white;border:1px solid var(--line);border-radius:14px;padding:26px 28px;text-decoration:none;position:relative}.exam-card:hover{border-color:var(--green);box-shadow:0 7px 20px #233c3510}.exam-card h2{font-family:var(--serif);font-size:29px;margin:15px 0 8px}.exam-card p{font-size:13px;color:var(--muted);margin-bottom:20px}.exam-card .arrow{float:right;font-size:25px}.exam-card .card-foot{border-top:1px solid var(--line);padding-top:16px;display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:13px}.tag.orange{background:#f6e9df;color:var(--orange)}.stats{display:grid;grid-template-columns:repeat(3,1fr);background:white;border:1px solid var(--line);border-radius:12px;margin:24px 0;padding:20px}.stat{text-align:center;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat strong{display:block;font-size:30px;line-height:1.35}.stat small{font-size:12px;color:var(--muted)}.bar{height:5px;background:#e8eade;border-radius:4px;overflow:hidden;margin-top:12px}.bar span{display:block;height:100%;background:var(--green)}.breadcrumb{font-size:12px;margin-bottom:24px}.title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.title-row h1{font-size:36px;margin:8px 0}.title-row p{max-width:700px}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.toolbar{display:flex;gap:12px;flex-wrap:wrap;background:white;padding:16px;border:1px solid var(--line);border-radius:10px;margin:24px 0}.toolbar label{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}.toolbar select{background:white;border:1px solid var(--line);border-radius:6px;padding:9px;color:var(--ink);min-height:44px}.tabs{display:flex;gap:8px;flex-wrap:wrap}.tabs button[aria-pressed=true]{background:var(--green);color:white;border-color:var(--green)}.layout{display:grid;grid-template-columns:1fr 280px;gap:24px}.panel{background:white;border:1px solid var(--line);border-radius:12px;padding:26px}.panel h3{margin:0 0 14px}.topic-row{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:12px 0;font-size:13px;gap:16px}.topic-row:last-child{border-bottom:0}.topic-row span{color:var(--muted)}.question-list{display:grid;gap:12px}.question-row{display:flex;justify-content:space-between;gap:18px;align-items:center;width:100%;text-align:left;padding:18px 20px;background:white;border-radius:10px}.question-row strong{display:block;font-size:15px}.question-row small{font-size:11px;color:var(--muted)}.question-row .state{font-size:12px;white-space:nowrap}.empty{text-align:center;padding:45px 18px;background:white;border:1px dashed var(--line);border-radius:12px}.empty h2{font-size:21px}.empty p{color:var(--muted);font-size:13px}.quiz{max-width:800px;margin:auto}.quiz-meta{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:16px;font-size:12px}.quiz h1{font-size:29px;margin-bottom:12px;line-height:1.5}.quiz-prompt{font-size:17px;margin:18px 0 26px;font-weight:600;line-height:1.9}.choices{display:grid;gap:12px}.choice{display:flex;align-items:flex-start;text-align:left;gap:15px;padding:16px 18px;width:100%}.letter{display:grid;place-items:center;flex-shrink:0;min-width:28px;height:28px;border-radius:50%;border:1px solid var(--line);font-size:12px}.choice[aria-pressed=true]{border:2px solid var(--green);background:var(--mint);padding:15px 17px}.choice.correct{border-color:#267158;background:#eaf3e8;opacity:1}.choice.incorrect{border-color:#b66750;background:#fbf0eb;opacity:1}.answer-actions{margin:22px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.feedback{margin:26px 0 0;border-top:1px solid var(--line);padding-top:24px}.result{font-weight:700;font-size:20px;color:var(--green)}.result.wrong{color:#a64b2f}.explanations{display:grid;gap:12px}.explanation{padding:14px 16px;border-left:3px solid var(--line);background:#f8f9f4}.explanation.correct{border-color:var(--green)}.explanation strong{font-size:13px}.explanation p{font-size:13px;margin:6px 0 0}.source{font-size:12px;color:var(--muted);margin:20px 0 0}.guide{max-width:840px;margin:auto}.guide section{margin:24px 0}.guide li{margin:8px 0}.guide h1{font-size:36px}.guide h2{font-size:21px}.guide p,.guide li{font-size:14px}.guide table{width:100%;border-collapse:collapse;font-size:13px}.guide td,.guide th{padding:12px;text-align:left;border-bottom:1px solid var(--line)}.history{display:grid;gap:8px;margin-top:22px}.history-item{border-bottom:1px solid var(--line);padding:12px 0;display:flex;justify-content:space-between;gap:16px;font-size:13px}.history-item small{display:block;color:var(--muted)}footer{border-top:1px solid var(--line);max-width:1124px;margin:auto;padding:24px 0;display:flex;gap:24px;justify-content:space-between;flex-wrap:wrap;font-size:11px;color:var(--muted)}.skip{position:fixed;top:-100px;left:15px;background:white;padding:10px;z-index:3}.skip:focus{top:10px}.warning{position:fixed;bottom:14px;left:14px;right:14px;background:#fff2dc;border:1px solid #d7ad66;border-radius:10px;padding:14px;z-index:10;font-size:13px}dialog{border:1px solid var(--line);border-radius:14px;padding:28px;max-width:min(500px,calc(100% - 32px));color:var(--ink)}dialog::backdrop{background:#183b3655}dialog h2{font-size:22px}dialog p{font-size:14px}main:focus{outline:none}
@media(max-width:1180px){main,footer{margin-left:28px;margin-right:28px}header{padding:22px 28px}}
@media(max-width:700px){header{padding:17px 20px;display:block}.brand{font-size:18px}.mark{width:36px;height:36px}nav{margin-top:18px;justify-content:space-between;gap:16px;font-size:12px}main{padding-top:28px;margin:0 20px 0}h1{font-size:32px}.hero{display:block;margin-bottom:24px}.hero h1{font-size:34px}.hero p{font-size:13px}.study-note{margin-top:26px;padding:20px}.study-note .big{font-size:22px}.steps{gap:8px}.steps strong{font-size:12px}.cards{grid-template-columns:1fr;gap:14px}.exam-card{padding:22px}.exam-card h2{font-size:26px}.section-head h2{font-size:21px}.section-head{align-items:flex-start}.layout{grid-template-columns:1fr}.layout aside{order:-1}.title-row{display:block}.title-row h1{font-size:30px}.stats{padding:16px 8px}.stat strong{font-size:25px}.stat small{font-size:10px}.toolbar{padding:12px}.tabs{gap:6px}.tabs button{font-size:12px;padding:8px 11px}.panel{padding:20px}.quiz h1{font-size:25px}.quiz-prompt{font-size:15px}.choice{padding:14px 12px;gap:10px;font-size:14px}.choice[aria-pressed=true]{padding:13px 11px}.quiz-meta{align-items:flex-start}.quiz-meta button{font-size:12px;padding:7px 10px}.guide h1{font-size:29px}.guide table{font-size:12px}.guide td,.guide th{padding:9px}.history-item{display:block}.history-item>span{font-size:11px}footer{margin:0 20px;padding:24px 0;display:block}footer span,footer a{display:block;margin-bottom:8px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}