.yex2-app{max-width:980px;margin:24px auto;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:#172033}.yex2-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.yex2-head h2{margin:2px 0 0;font-size:28px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.08em;color:#667085}.yex2-head #yex2-study-clock{font-weight:800;background:#111827;color:white;border-radius:999px;padding:10px 14px;white-space:nowrap}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.cards>div{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:18px;box-shadow:0 4px 18px rgba(0,0,0,.04)}.cards b{display:block;font-size:28px}.cards span{font-size:12px;color:#667085}.analysis{margin:16px 0;background:#f8fafc;border:1px solid #e2e8f0;border-radius:16px;padding:18px}.analysis h3{margin-top:0}.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.modes button,.nextrow button,.qtop button,.empty button{border:1px solid #d0d5dd;background:white;border-radius:12px;padding:14px;font-weight:800;cursor:pointer}.modes button:hover{transform:translateY(-1px);box-shadow:0 5px 18px rgba(0,0,0,.06)}.qtop{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.badges{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0}.badges span{font-size:12px;font-weight:800;background:#f2f4f7;border-radius:999px;padding:7px 10px}.qbody{font-size:20px;line-height:1.8;background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:20px}.choices{display:grid;gap:10px}.choice{display:flex;gap:12px;align-items:flex-start;text-align:left;border:1px solid #d0d5dd;background:#fff;border-radius:14px;padding:15px;cursor:pointer;font-size:16px;line-height:1.65}.choice i{font-style:normal;font-weight:900;display:grid;place-items:center;min-width:28px;height:28px;border-radius:50%;background:#111827;color:#fff}.choice:disabled{opacity:.75}.confidence{display:flex;gap:14px;flex-wrap:wrap;margin:16px 0;font-size:13px}.judge{font-size:20px;font-weight:900;padding:14px;border-radius:12px;margin-top:14px}.judge.ok{background:#ecfdf3}.judge.ng{background:#fff1f2}.explain{border:1px solid #e5e7eb;border-radius:14px;padding:16px;margin-top:10px;line-height:1.8}.nextrow{display:flex;justify-content:space-between;gap:10px;margin-top:14px}.nextrow .primary{background:#111827;color:#fff;border-color:#111827}.empty{text-align:center;padding:40px;border:1px solid #e5e7eb;border-radius:16px}.yex2-loading{padding:30px;text-align:center}@media(max-width:700px){.cards{grid-template-columns:repeat(2,1fr)}.modes{grid-template-columns:1fr}.yex2-head{align-items:flex-start}.yex2-head h2{font-size:22px}.qbody{font-size:17px;padding:16px}.choice{font-size:15px}.qtop{align-items:flex-start;gap:8px;flex-direction:column}.nextrow{flex-direction:column}.nextrow button{width:100%}}
.yex2-question-image{display:block;width:100%;height:auto;max-width:980px;margin:0 auto;background:#fff}.yex2-app .qbody{background:#fff;padding:12px;border-radius:10px;overflow:auto}.yex2-app .answer-guide{font-weight:700;margin:14px 0 8px}.yex2-app .choice.selected{outline:3px solid currentColor;transform:translateY(-1px)}
.yex2-question-image{display:block;max-width:100%;height:auto;margin:0 auto}.yex2-dataset{font-size:12px;opacity:.72;margin-top:3px}
/* v0.4.3 readability + timer controls */
.qzoom{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:12px 0 8px;padding:10px 12px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px}.qzoom button,.mock-controls button,.study-reset{border:1px solid #cbd5e1;background:#fff;border-radius:10px;padding:9px 12px;font-weight:800;cursor:pointer}.qzoom span{font-size:13px;color:#667085}.mock-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:10px 0 14px;padding:11px;background:#111827;color:#fff;border-radius:12px}.mock-controls strong{font-size:20px;margin-right:auto}.mock-controls button{color:#111827}.yex2-question-image{cursor:zoom-in;image-rendering:auto}.qbody{-webkit-overflow-scrolling:touch;overflow-x:auto!important}.yex2-clockbox{display:flex;gap:7px;align-items:center}.study-reset{padding:8px 10px;font-size:12px}
@media(max-width:700px){.yex2-app{margin:12px auto}.qbody{padding:10px!important;border-radius:12px!important}.yex2-question-image{max-width:none!important}.qzoom{position:sticky;top:0;z-index:5;background:#fff}.qzoom button{min-width:46px;font-size:18px;padding:10px}.qzoom span{width:100%;font-size:12px}.mock-controls{align-items:stretch}.mock-controls strong{width:100%;font-size:24px;text-align:center}.mock-controls button{flex:1;min-width:105px}.badges span{font-size:11px}.answer-guide{font-size:16px}.confidence{font-size:14px}.yex2-head{flex-direction:column}.yex2-clockbox{width:100%;justify-content:space-between}}

/* v0.4.4 hints + active correction */
.hintbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:10px 0}.hintbar button{border:1px solid #d0d5dd;background:#fff;border-radius:10px;padding:10px 13px;font-weight:800;cursor:pointer}.hintbar span{font-size:12px;color:#667085}.hintbox{margin:8px 0 14px;padding:14px 16px;border:1px solid #f2c94c;background:#fffbea;border-radius:12px;line-height:1.7;font-size:15px}.correction-box{margin-top:12px;padding:16px;border:2px solid #f0a23a;background:#fff8ee;border-radius:14px;line-height:1.75}.correction-box h4{margin:0 0 8px}.retry{background:#fff7ed!important;border-color:#fb923c!important}.nextrow .primary:disabled{opacity:.45;cursor:not-allowed}.choice.correction-ok{outline:3px solid #16a34a;background:#f0fdf4}.choice.correction-ng{outline:3px solid #dc2626;background:#fef2f2}.choice:disabled.correction-ok{opacity:1}
@media(max-width:700px){.hintbar{display:grid;grid-template-columns:1fr 1fr}.hintbar button{font-size:16px;padding:13px 10px}.hintbar span{grid-column:1/-1}.hintbox{font-size:16px}.correction-box{font-size:16px}.nextrow{gap:8px}}
.choice-explanation{margin:14px 0;padding:14px 16px;border-radius:12px;font-size:16px;line-height:1.8}.choice-explanation h5,.main-explanation h5,.memory-tip h5{margin:0 0 6px;font-size:17px}.correct-exp{background:#eef9f0;border-left:5px solid #2e7d32}.wrong-exp{background:#fff2f2;border-left:5px solid #c62828}.memory-tip{margin:14px 0;padding:14px 16px;background:#fff8df;border-radius:12px}.choice-detail{margin:8px 0;padding:10px 12px;background:#f7f7f7;border-radius:10px}.choice-detail summary{font-weight:700;cursor:pointer}.explain-title{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.verified{font-size:12px;background:#e7f6eb;padding:4px 8px;border-radius:999px}.checking{font-size:12px;background:#fff3cd;padding:4px 8px;border-radius:999px}.answer-meta{opacity:.75;font-size:13px}@media(max-width:700px){.choice-explanation{font-size:17px;line-height:1.9}.choice-explanation h5,.main-explanation h5,.memory-tip h5{font-size:18px}}


/* v0.5.2 user issue reporting */
.report-wrap{margin:18px 0 4px;border-top:1px solid #e5e7eb;padding-top:14px}.report-open{background:#fff;border:1px solid #cbd5e1;color:#334155;border-radius:9px;padding:10px 14px;font-weight:700}.report-panel{margin-top:10px;padding:16px;border:1px solid #cbd5e1;border-radius:12px;background:#f8fafc}.report-panel h4{margin:0 0 8px}.report-panel p{margin:0 0 12px;color:#475569}.report-panel label{display:block;font-weight:700;margin:10px 0}.report-panel select,.report-panel textarea{box-sizing:border-box;width:100%;margin-top:6px;border:1px solid #94a3b8;border-radius:8px;padding:10px;background:#fff;font:inherit}.report-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.report-status{margin-top:10px;font-weight:700;color:#334155}@media(max-width:700px){.report-panel{padding:13px}.report-open{width:100%;font-size:15px}.report-actions button{min-height:44px;flex:1}}