@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700&display=swap');
:root{--paper:#f7f6f2;--ink:#283e36;--muted:#7c847b;--green:#365947;--line:#e3e6dd;--orange:#bc754e}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.7 system-ui,'Microsoft YaHei',sans-serif}button,a,input,select{font:inherit}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #c2915d;outline-offset:4px}aside{width:242px;position:fixed;inset:0 auto 0 0;background:#eeefe7;border-right:1px solid var(--line);padding:42px 27px;display:flex;flex-direction:column}.brand{font-family:'Noto Serif SC',serif;font-size:35px;font-weight:700;text-decoration:none;color:var(--ink);letter-spacing:6px}.brand span{display:block;letter-spacing:2px;font:9px system-ui;margin-top:7px}.exam{margin:38px 0 28px;font-size:11px;letter-spacing:1px}.exam span{float:right;background:#dce3d6;padding:0 8px;border-radius:4px}nav{display:grid;gap:8px}nav button{border:0;background:none;color:#727d72;padding:12px 14px;text-align:left;border-radius:6px}nav button.active{background:#dfe6d9;color:var(--green);font-weight:650}nav button span{display:inline-block;width:29px}.aside-note{margin-top:auto;font-family:serif;font-size:18px}.aside-note p{font:12px system-ui;color:var(--muted)}.subtle{border:1px solid var(--line);background:transparent;color:var(--muted);padding:9px 15px;border-radius:5px}main{margin-left:242px;padding:0 48px;max-width:1560px}header{height:85px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.local{font-size:11px}h1,h2,h3,p{margin-top:0}h1{font-family:'Noto Serif SC',serif;font-size:34px;font-weight:600;line-height:1.4;letter-spacing:1px;margin-bottom:14px}h2{font-size:19px;font-weight:600}h3{font-size:15px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--muted);margin-bottom:16px}.hero{margin-top:30px;padding:35px 36px;background:#e8ecdf;border:1px solid #dee5d6;border-radius:10px;position:relative;overflow:hidden;display:flex;justify-content:space-between;gap:20px}.hero p{color:#697766;max-width:510px;font-size:13px}.hero-art{font-family:serif;color:#677c52;display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:155px}.hero-art b{font-size:69px;font-weight:400;line-height:1.15}.hero-art span{font-size:10px;letter-spacing:3px;margin-top:12px}.primary{background:var(--green);color:white;border:0;padding:11px 21px;border-radius:5px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0 30px}.stat{background:#fffefa;border:1px solid var(--line);border-radius:8px;padding:19px 23px}.stat label{font-size:11px;color:var(--muted);display:block}.stat b{font-size:28px;font-weight:500}.stat small{color:var(--muted);margin-left:6px;font-size:11px}.columns{display:grid;grid-template-columns:1.65fr 1fr;gap:24px}.panel{background:#fffefa;border:1px solid var(--line);border-radius:9px;padding:25px}.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.panel-head h2{margin:0}.tag{color:#798168;background:#edf0e5;border-radius:4px;padding:3px 8px;font-size:10px}.task{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid #eeeee6;align-items:center}.task:last-child{border:0}.task input{accent-color:var(--green);width:18px;height:18px}.task label{flex:1;cursor:pointer}.task strong{display:block;font-weight:500}.task small{color:var(--muted);font-size:11px}.task em{font-style:normal;font-size:11px;color:var(--muted)}.quote{font-family:'Noto Serif SC',serif;font-size:25px;line-height:1.9;margin:18px 0}.muted{color:var(--muted);font-size:12px}.progress{height:5px;background:#ebeee5;border-radius:8px;margin:15px 0}.progress i{display:block;height:100%;background:#6c8961;border-radius:8px}.notice{background:#f5eee3;border:1px solid #ede2d1;padding:15px 18px;border-radius:6px;margin-top:20px;color:#8a7155;font-size:12px}.page-title{padding:35px 0 20px}.tabs{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:22px}.tabs button{background:#fffefa;border:1px solid var(--line);border-radius:30px;padding:7px 18px;color:var(--muted)}.tabs button.active{background:var(--green);color:white}.study-card{max-width:760px;margin:auto;text-align:center;padding:40px}.word{font-family:'Noto Serif SC',serif;font-size:43px;margin:20px 0}.reading{color:var(--muted);letter-spacing:3px}.answer{background:#f1f3e9;padding:20px;border-radius:8px;margin-top:20px;text-align:left}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:20px}.row.center{justify-content:center}.question{font-size:21px;line-height:2;margin:20px 0}.options{display:grid;gap:10px}.option{border:1px solid var(--line);border-radius:6px;background:white;padding:13px 18px;text-align:left;color:var(--ink)}.option.good{background:#e4eedf;border-color:#8ca780}.option.bad{background:#fae8df;border-color:#cf997f}.stage{padding:20px 0;border-bottom:1px solid var(--line)}.stage strong{font-size:17px}.stage p{color:var(--muted);margin:10px 0 0;font-size:13px}.timer{text-align:center;font-size:78px;font-weight:300;letter-spacing:4px;margin:35px 0}.empty{text-align:center;padding:50px 15px;color:var(--muted)}footer{font-size:11px;color:#91958b;display:flex;justify-content:space-between;padding:30px 0;margin-top:15px;border-top:1px solid var(--line)}#toast{position:fixed;bottom:25px;left:50%;background:var(--green);color:white;padding:12px 25px;border-radius:5px;display:none}.history{display:flex;gap:6px;flex-wrap:wrap;margin:15px 0}.day{width:25px;height:25px;border-radius:3px;background:#edf0e7}.day.done{background:#6f8d60}select,input[type=number]{border:1px solid var(--line);padding:9px;border-radius:5px;background:white;color:var(--ink)}@media(min-width:1450px){main{padding:0 65px}}@media(max-width:1000px){aside{width:200px;padding:30px 18px}main{margin-left:200px;padding:0 25px}.columns{grid-template-columns:1fr}.stats{gap:10px}.stat{padding:15px}.hero-art{min-width:100px}.hero-art b{font-size:55px}}@media(max-width:650px){aside{position:static;width:100%;padding:17px 20px;display:block}.brand{font-size:25px}.brand span{display:inline;font-size:8px;margin-left:12px}.exam,.aside-note,aside>.subtle{display:none}nav{display:flex;overflow:auto;margin-top:13px;gap:4px}nav button{white-space:nowrap;padding:8px;font-size:12px}nav button span{width:18px}main{margin:0;padding:0 18px}header{height:55px}.local{font-size:9px}h1{font-size:25px}.hero{padding:24px 22px;margin-top:20px}.hero-art{display:none}.stats{grid-template-columns:1fr 1fr;margin:17px 0 22px}.stat b{font-size:25px}.panel{padding:20px}.study-card{padding:24px 16px}footer{display:block}footer span{display:block}.timer{font-size:55px}}

.detailed-answer{font-size:15px;line-height:1.95}.detailed-answer section{padding:22px 0;border-bottom:1px solid var(--line)}.detailed-answer h3{font-size:17px;color:var(--green);margin-bottom:12px}.detailed-answer p{margin:8px 0}.explanation-summary{padding:16px 0}.detailed-answer dl{margin:0}.detailed-answer dl>div{display:grid;grid-template-columns:minmax(140px,1fr) 2fr;gap:16px;padding:12px 0;border-bottom:1px dashed var(--line)}.detailed-answer dt{font-weight:600}.detailed-answer dd{margin:0;color:#536053}.detailed-answer ol{padding-left:24px}.detailed-answer li{padding-left:5px;margin:9px 0}.option-reason{background:#faf9f4;padding:14px 18px;margin:10px 0;border:1px solid var(--line);border-radius:6px}.option-reason strong{font-size:14px}.option-reason p{font-size:14px}.correct-reason{border-color:#91a984;background:#edf3e8}.detailed-answer .question-note{position:static;inset:auto;display:block;width:auto;min-width:0;padding:16px 20px;margin:18px 0;background:#f7eedf;border:1px solid #e8d9bf;border-radius:6px;font-size:13px;color:#80694b}.transfer{background:#f5f6ed;padding:20px!important;margin-top:20px;border-radius:6px}summary{cursor:pointer;color:var(--green);padding:9px 0}details[open]>summary{margin-bottom:12px}#feedback>.answer{background:transparent;padding:20px 0}@media(max-width:650px){.detailed-answer dl>div{grid-template-columns:1fr;gap:4px}.detailed-answer{font-size:14px}.option-reason{padding:12px}.detailed-answer h3{font-size:16px}}

#sync-dialog{width:min(620px,94vw);max-height:85vh;overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);padding:25px;font:14px/1.8 system-ui}#sync-dialog::backdrop{background:#142b2459}#sync-dialog input{width:100%;border:1px solid var(--line);border-radius:5px;padding:10px;margin:8px 0 18px;font:13px monospace}#sync-dialog label{display:block}#sync-dialog .panel-head h2{font-size:19px}header #sync-status{font-size:11px;max-width:58%;overflow-wrap:anywhere}

.question-japanese ruby{ruby-position:over;ruby-align:center}.question-japanese rt{font-size:.55em;font-weight:400;color:#687563;line-height:1.2;letter-spacing:.02em}.question-japanese rp{color:#687563}.question:has(ruby){line-height:2.5}.option:has(ruby){line-height:2.3;padding-top:17px}.hide-question-furigana .question-japanese rt,.hide-question-furigana .question-japanese rp{display:none}.furigana-toggle{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin:12px 0}.furigana-toggle input{accent-color:var(--green)}