:root{--primary: #4f46e5;--primary-dark: #4338ca;--primary-soft: #eef2ff;--ink: #0f172a;--ink-soft: #475569;--ink-faint: #94a3b8;--bg: #f1f5f9;--card: #ffffff;--line: #e2e8f0;--ok: #16a34a;--ok-soft: #f0fdf4;--ng: #dc2626;--ng-soft: #fef2f2;--accent: #f59e0b;--radius: 14px;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 16px rgba(15, 23, 42, .06)}*{box-sizing:border-box}body{margin:0;font-family:Hiragino Sans,Yu Gothic UI,Yu Gothic,Meiryo,system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.8;-webkit-font-smoothing:antialiased}.app{min-height:100vh;display:flex;flex-direction:column}.header{position:sticky;top:0;z-index:10;background:var(--card);border-bottom:1px solid var(--line)}.header-inner{max-width:760px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:10px}.logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;font-weight:800;font-size:.95rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}.header h1{font-size:1.05rem;font-weight:700;margin:0;cursor:pointer;letter-spacing:.01em}.header .subtitle{margin-left:auto;font-size:.72rem;color:var(--ink-faint)}main{width:100%;max-width:760px;margin:0 auto;padding:20px 20px 56px;flex:1}.exam-picker{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px;margin-bottom:16px}.exam-picker label{display:block;font-size:.72rem;font-weight:700;color:var(--ink-faint);letter-spacing:.08em;margin-bottom:6px}.exam-picker select{width:100%;padding:11px 38px 11px 13px;font-size:1rem;font-weight:700;font-family:inherit;color:var(--primary);background-color:var(--primary-soft);background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg 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.15s,border-color .15s,background .15s}.reset-btn:hover{color:var(--ng);border-color:var(--ng);background:var(--ng-soft)}.stats-summary{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}.stats-rate{font-size:2.4rem;font-weight:800;color:var(--primary);line-height:1}.stats-rate small{font-size:1.1rem;font-weight:700}.stats-detail{font-size:.9rem;color:var(--ink-soft)}.category-stats{list-style:none;margin:16px 0 0;padding:14px 0 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;font-size:.82rem}.category-stats li{display:flex;align-items:center;gap:10px}.cat-name{flex:0 0 92px;color:var(--ink-soft);font-weight:600}.cat-bar{flex:1;height:8px;background:var(--bg);border-radius:999px;overflow:hidden}.cat-bar-fill{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#7c3aed);border-radius:999px;transition:width .4s}.cat-rate{flex:0 0 104px;text-align:right;color:var(--ink-faint);font-variant-numeric:tabular-nums}.mode-btn{display:flex;align-items:center;gap:14px;width:100%;padding:15px 18px;margin-bottom:10px;font-size:.98rem;font-weight:600;font-family:inherit;text-align:left;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:12px;cursor:pointer;transition:transform .1s,box-shadow .15s,border-color .15s}.mode-btn:hover:not(:disabled){border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-1px)}.mode-btn:disabled{opacity:.45;cursor:default}.mode-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0;background:var(--primary-soft)}.mode-label{flex:1;line-height:1.5}.mode-count{font-size:.78rem;font-weight:500;color:var(--ink-faint);display:block}.mode-btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.mode-btn.primary 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.15s}.check-btn:hover{border-color:var(--accent);color:#b45309}.check-btn.on{background:#fffbeb;border-color:var(--accent);color:#b45309}.question-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:14px}.question-meta{display:flex;align-items:center;gap:8px;margin-bottom:10px}.tag{background:var(--primary-soft);color:var(--primary);border-radius:999px;padding:2px 12px;font-size:.72rem;font-weight:700}.question-text{font-size:1.02rem;margin:0;white-space:pre-wrap}.figure{border:1px solid var(--line);border-radius:10px;padding:10px;margin-top:14px;text-align:center;background:#fff}.figure img{max-width:100%;height:auto}.source-label{font-size:.7rem;color:var(--ink-faint);text-align:right;margin:12px 0 0}.choices{display:flex;flex-direction:column;gap:9px}.choice{display:flex;align-items:baseline;gap:12px;padding:13px 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.choice-label{background:var(--ng);color:#fff}.choice.disabled{opacity:.55}.choice:disabled{cursor:default}.feedback{margin-top:16px}.verdict{display:flex;align-items:center;gap:10px;font-size:1rem;font-weight:700;border-radius:12px;padding:12px 16px;margin:0 0 12px}.verdict.ok{color:var(--ok);background:var(--ok-soft);border:1px solid #bbf7d0}.verdict.ng{color:var(--ng);background:var(--ng-soft);border:1px solid #fecaca}.verdict-icon{width:26px;height:26px;border-radius:50%;color:#fff;font-size:.85rem;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.verdict.ok .verdict-icon{background:var(--ok)}.verdict.ng .verdict-icon{background:var(--ng)}.explanation{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px;margin-bottom:16px}.explanation h3{font-size:.78rem;font-weight:700;color:var(--primary);letter-spacing:.08em;margin:0 0 6px;display:flex;align-items:center;gap:6px}.explanation h3:before{content:"";width:3px;height:14px;border-radius:2px;background:var(--primary)}.explanation>p{margin:0 0 14px;font-size:.92rem}.explanation .pending{color:var(--ink-faint);font-style:italic}.choice-notes{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;font-size:.88rem}.choice-notes li{display:flex;align-items:baseline;gap:10px;padding:10px 12px;background:var(--bg);border-radius:10px;line-height:1.7}.choice-notes li.note-correct{background:var(--ok-soft)}.choice-notes li.note-correct .choice-label{background:var(--ok);color:#fff}.next-btn{display:block;width:100%;padding:15px;font-size:1rem;font-weight:700;font-family:inherit;color:#fff;background:var(--primary);border:none;border-radius:12px;cursor:pointer;transition:background .15s}.next-btn:hover{background:var(--primary-dark)}.result{text-align:center;padding-top:40px}.result-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:36px 24px;max-width:420px;margin:0 auto}.result h2{margin-bottom:20px}.score-rate-big{font-size:3.2rem;font-weight:800;color:var(--primary);line-height:1}.score-rate-big small{font-size:1.4rem}.score{font-size:.95rem;color:var(--ink-soft);margin:10px 0 24px}.score strong{color:var(--ink)}.footer{border-top:1px solid var(--line);background:var(--card)}.footer p{max-width:760px;margin:0 auto;padding:16px 20px 0;font-size:.7rem;color:var(--ink-faint);line-height:1.7}.footer-nav{max-width:760px;margin:0 auto;padding:10px 20px 18px;display:flex;flex-wrap:wrap;gap:16px;font-size:.72rem}.footer-nav a{color:var(--ink-soft);text-decoration:none}.footer-nav a:hover{text-decoration:underline}@media(max-width:480px){main{padding:14px 12px 40px}.card,.question-card{padding:16px}.cat-name{flex-basis:78px}.cat-rate{flex-basis:92px}}.overline{text-decoration:overline;padding:0 1px}