*,*:before,*:after{box-sizing:border-box}:root{--bg: #fff7ed;--card: #ffffff;--ink: #1f2937;--ink-soft: #4b5563;--muted: #9ca3af;--line: #f1e9dd;--accent: #f97316;--accent-soft: #ffedd5;--good: #16a34a;--good-soft: #dcfce7;--bad: #dc2626;--bad-soft: #fee2e2;--shadow: 0 8px 32px rgba(31, 41, 55, .08);--radius: 14px;--radius-sm: 10px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,Hiragino Sans,Yu Gothic UI,sans-serif;color:var(--ink)}body{margin:0;background:var(--bg);min-height:100vh;-webkit-font-smoothing:antialiased}button{font-family:inherit;font-size:1rem;cursor:pointer}.app{max-width:640px;margin:0 auto;padding:24px 16px 80px}.app-header{position:relative;text-align:center;margin-bottom:20px;min-height:36px}.back-button{position:absolute;left:0;top:4px;background:transparent;border:1.5px solid var(--line);color:var(--ink-soft);padding:6px 12px;border-radius:999px;font-size:.85rem;font-weight:500;transition:border-color .15s ease,color .15s ease}.back-button:hover{border-color:var(--accent);color:var(--accent)}.app-header h1{margin:0;font-size:1.75rem;letter-spacing:-.02em}.tagline{margin:4px 0 0;color:var(--ink-soft);font-size:.95rem}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.card-title{margin:0 0 6px;font-size:1.25rem}.card-sub{margin:0 0 18px;color:var(--ink-soft);font-size:.95rem;line-height:1.45}.language-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.language-button{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:14px;border:2px solid var(--line);border-radius:var(--radius-sm);background:#fff;text-align:left;transition:border-color .15s ease,transform .05s ease;min-height:76px}.language-button:hover{border-color:var(--accent)}.language-button:active{transform:scale(.98)}.flag{font-size:1.5rem;margin-bottom:2px}.lang-name{font-weight:600;font-size:1rem;color:var(--ink)}.lang-native{font-size:.85rem;color:var(--ink-soft)}.status-bar{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--ink-soft);margin-bottom:16px;flex-wrap:wrap}.status-item{font-variant-numeric:tabular-nums;font-weight:500}.status-item.muted,.status-sep{color:var(--muted)}.category-tag{display:inline-block;background:var(--accent-soft);color:var(--accent);font-size:.75rem;text-transform:uppercase;font-weight:700;letter-spacing:.06em;padding:3px 8px;border-radius:999px;margin:0 0 10px}.question-text{font-size:1.2rem;line-height:1.5;margin-bottom:18px;color:var(--ink)}.tokenized{display:inline}.token{display:inline;background:transparent;border:none;padding:0 1px;margin:0;font:inherit;color:inherit;text-decoration:underline;text-decoration-style:dotted;text-decoration-color:#f9731699;text-decoration-thickness:1px;text-underline-offset:3px;cursor:pointer;border-radius:3px}.token:hover{background:var(--accent-soft)}.token-disabled{color:var(--ink);text-decoration:none;cursor:default}.token-disabled:hover{background:transparent}.choices{display:flex;flex-direction:column;gap:10px}.choice{display:flex;align-items:center;gap:12px;padding:14px;border:2px solid var(--line);border-radius:var(--radius-sm);background:#fff;font-size:1rem;line-height:1.4;min-height:52px;transition:border-color .15s ease,background-color .15s ease;user-select:none}.choice:not(.choice-locked):hover{border-color:var(--accent);background:#fffaf3}.choice-letter{flex:0 0 26px;height:26px;width:26px;display:inline-flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent);border-radius:999px;font-weight:700;font-size:.85rem}.choice-text{flex:1}.choice-correct{border-color:var(--good);background:var(--good-soft)}.choice-correct .choice-letter{background:var(--good);color:#fff}.choice-wrong{border-color:var(--bad);background:var(--bad-soft)}.choice-wrong .choice-letter{background:var(--bad);color:#fff}.choice-faded{opacity:.55}.choice-locked{cursor:default}.feedback{margin-top:18px;padding:14px;border-radius:var(--radius-sm);border-left:4px solid var(--muted);background:#fafafa}.feedback-correct{border-left-color:var(--good);background:var(--good-soft)}.feedback-wrong{border-left-color:var(--bad);background:var(--bad-soft)}.feedback-headline{margin:0 0 6px;font-weight:700;font-size:.95rem}.feedback-explanation{margin:0;line-height:1.45;color:var(--ink)}.feedback-toggle{margin-top:8px;background:transparent;border:none;color:var(--accent);font-size:.85rem;font-weight:600;padding:0;text-decoration:underline}.feedback-en{margin:8px 0 0;color:var(--ink-soft);font-size:.95rem;line-height:1.45;font-style:italic}.next-button{display:block;width:100%;margin-top:18px;padding:14px 18px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:1rem;font-weight:600;transition:background-color .15s ease,transform .05s ease}.next-button:hover{background:#ea6b0d}.next-button:active{transform:scale(.99)}.hint-popover{position:absolute;transform:translate(-50%);background:#1f2937;color:#fff;padding:10px 12px;border-radius:10px;box-shadow:0 12px 28px #0000002e;z-index:100;min-width:140px;max-width:240px;text-align:center;pointer-events:auto}.hint-word{font-weight:700;font-size:.9rem;margin-bottom:4px;color:#ffd9b3}.hint-translation{font-size:.95rem;line-height:1.35}.summary-card{text-align:center}.summary-title{margin:0 0 4px;font-size:1.4rem}.summary-language{margin:0 0 14px;color:var(--ink-soft)}.big-score{display:flex;align-items:baseline;justify-content:center;gap:6px;margin:18px 0 14px}.big-score-num{font-size:4rem;font-weight:800;color:var(--accent);line-height:1}.big-score-of{font-size:1.4rem;color:var(--ink-soft);font-weight:500}.summary-target{font-size:1.15rem;font-weight:600;margin:6px 0 4px}.summary-en{margin:0 0 18px;color:var(--ink-soft);line-height:1.45}.app-footer{text-align:center;margin-top:28px;font-size:.8rem;color:var(--muted)}.app-footer a{display:inline-flex;align-items:center;gap:6px;color:var(--ink-soft);text-decoration:none;padding:4px 10px;border-radius:999px;transition:color .15s ease,background-color .15s ease;letter-spacing:.01em}.app-footer a:hover{color:var(--accent);background:var(--accent-soft)}.footer-glyph{display:inline-block;font-size:.95rem;line-height:1;transform:translateY(-.5px);transition:transform .2s ease}.app-footer a:hover .footer-glyph{transform:translate(2px,-2.5px)}@media (max-width: 420px){.app{padding:16px 12px 72px}.card{padding:18px 16px}.question-text{font-size:1.1rem}.language-grid{grid-template-columns:1fr}.big-score-num{font-size:3.2rem}.back-button{position:static;display:inline-flex;margin-bottom:8px}.app-header{text-align:left}}