:root{color-scheme:light;--navy:#14253b;--teal:#076e65;--aqua:#4edac8;--line:#d8e1e9;--muted:#536478;--bg:#eef2f6;--good:#087466;--bad:#a42d43}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--navy);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;font-size:16px;line-height:1.65}header{background:var(--navy);color:white;padding:20px max(18px,calc((100% - 1020px)/2));border-bottom:4px solid var(--aqua)}header small{font-size:14px;color:#c4d1df}h1{font-size:24px;margin:2px 0;font-weight:760}main{max-width:1060px;margin:auto;padding:22px 20px 48px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:20px}.stat{background:white;padding:13px 12px;border:1px solid var(--line);border-radius:12px}.stat strong{display:block;font-size:25px;line-height:1.35}.stat span{font-size:14px;color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.75fr);gap:20px}.panel{background:white;border:1px solid var(--line);border-radius:16px;padding:22px}.filters{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:22px}label{display:block;font-size:14px;font-weight:680;margin:0 0 6px}select,input,button{font:inherit;min-height:48px;border-radius:9px}select,input{padding:10px;border:1px solid #b8c5d2;background:white;color:var(--navy);width:100%}button{cursor:pointer;border:1px solid var(--line);background:#f4f7fa;color:var(--navy);padding:10px 12px;font-weight:680}button:hover{background:#e7edf3}button:disabled{opacity:.5;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #159589;outline-offset:3px}.question-head{display:flex;align-items:end;gap:12px;border-left:4px solid #128579;padding-left:15px;margin-bottom:16px}.question-head p{margin:0;font-size:14px;color:var(--muted)}.question-head h2{font-size:33px;line-height:1.2;margin:1px 0;letter-spacing:-.035em}.badge{font-size:13px;background:#edf3f8;padding:4px 9px;border-radius:6px;margin-bottom:5px}.stem{font-size:18px;font-weight:680;line-height:1.7;margin:0 0 16px}.choices{display:grid;gap:10px}.choice{display:grid;grid-template-columns:34px 1fr;gap:10px;width:100%;text-align:left;align-items:start;background:white;border:1.5px solid #cdd7e1;padding:13px 14px;min-height:56px;font-weight:500}.choice .num{display:grid;place-items:center;width:29px;height:29px;border-radius:50%;background:#eaf0f5;font-weight:750}.choice.selected{border-color:#087a70;background:#eefaf7;box-shadow:0 0 0 1px #087a70}.choice.selected .num{background:#087a70;color:white}.choice.answer-good{border-color:var(--good);background:#e9f7f3}.choice.answer-bad{border-color:var(--bad);background:#fff1f2}.submit{width:100%;margin-top:16px;background:var(--teal);color:white;border:0}.result{margin-top:18px;border-radius:12px;padding:16px;border:1px solid var(--line)}.result[hidden]{display:none}.result.good{background:#edf9f6;border-color:#a8dcd2}.result.bad{background:#fff3f4;border-color:#ebbdc5}.result h3{margin:0 0 7px;font-size:20px}.result p{margin:6px 0;white-space:pre-line}.source{display:inline-block;color:#06675e;margin-top:8px;font-size:14px}.row{display:flex;gap:8px;margin-top:12px}.row>*{flex:1}.message{min-height:25px;font-size:14px;color:var(--teal);margin-top:8px}.side-title{margin:0 0 12px;font-size:18px}.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;max-height:330px;overflow:auto;padding:3px}.grid button{padding:4px;min-height:42px;font-size:14px}.grid button.current{outline:2px solid var(--navy);outline-offset:0}.grid button.correct{background:#e6f5ef;color:#086459}.grid button.wrong{background:#fff0f1;color:#9f3244}.empty{grid-column:1/-1;color:var(--muted);font-size:14px}.legend{font-size:13px;color:var(--muted);margin:12px 0 0}progress{width:100%;height:5px;accent-color:var(--teal);display:block;margin-top:12px}.numberform{display:flex;gap:8px;margin-top:18px;align-items:end}.numberform>div{flex:1}.numberform button{flex:none}details{margin-top:19px;font-size:14px;color:var(--muted)}summary{cursor:pointer;font-weight:680;min-height:44px;color:var(--navy)}details p{margin:7px 0}footer{font-size:13px;color:var(--muted);margin-top:20px}footer a{color:#076e65}.loading{padding:40px 0;text-align:center;color:var(--muted)}@media(max-width:760px){main{padding:17px 15px 36px}.layout{grid-template-columns:1fr}.panel{padding:17px}.stats{gap:7px}.stat{padding:11px 8px}.stat strong{font-size:23px}.stat span{font-size:12px}header{padding:17px 18px}h1{font-size:21px}.stem{font-size:17px}.grid{max-height:240px}.question-head h2{font-size:29px}}@media(prefers-reduced-motion:no-preference){button{transition:background .15s,border-color .15s}}

/* Self-hosted V1: readable responsive controls and explicit states. */
[hidden]{display:none!important}
.choice:disabled{opacity:1;cursor:default}.choice:disabled:hover{background:inherit}
.choice.answer-good:disabled:hover{background:#e9f7f3}.choice.answer-bad:disabled:hover{background:#fff1f2}
.choice span:last-child,.stem,.result{overflow-wrap:anywhere;min-width:0}
.choice .verdict{font-size:14px;font-weight:700;display:block;margin-top:5px}
.question-head{flex-wrap:wrap}.badge{font-size:14px}.legend,footer{font-size:14px}
.warning{padding:12px;border:1px solid #e4be78;background:#fff8e7;color:#654514;border-radius:9px;font-size:14px}
.panel{min-width:0}.grid button{min-height:44px}.grid button span{display:block;font-size:12px}
#questionNumber:focus{outline:none}.row{flex-wrap:wrap}.row>*{min-width:120px}
@media(max-width:420px){.filters{grid-template-columns:1fr}.stat span{font-size:14px}.stat strong{font-size:21px}.panel{padding:14px}main{padding:14px 10px 30px}.choice{padding:12px 10px;grid-template-columns:29px 1fr}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}