.quiz{margin-top:2.5rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);padding:1.4rem 1.6rem 1.6rem}.quiz-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1.5rem;flex-wrap:wrap}.quiz-title{display:flex;align-items:center;gap:.45rem;margin:0;font-size:1.1rem;color:var(--heading);font-weight:700}.quiz-icon{width:1.1em;height:1.1em;color:var(--accent);flex-shrink:0}.quiz-meta{font-size:.75rem;color:var(--text-muted);background:var(--surface-elevated);border:1px solid var(--border);border-radius:999px;padding:2px 9px;white-space:nowrap;margin-left:auto}.quiz-progress{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1.25rem}.quiz-progress-label{font-size:.78rem;color:var(--text-muted)}.quiz-progress-track{height:4px;background:var(--surface-elevated);border-radius:999px;overflow:hidden}.quiz-progress-fill{height:100%;background:var(--accent);border-radius:999px;transition:width .3s ease}.quiz-question-area{display:flex;flex-direction:column;gap:.75rem}.quiz-q{margin:0;font-size:.97rem;color:var(--text);font-weight:600;line-height:1.5}.quiz-num{color:var(--accent);margin-right:.15rem}.quiz-opts{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.45rem}.quiz-opt{display:flex;align-items:center;gap:.6rem;width:100%;padding:.5rem .8rem;background:var(--surface-elevated);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-muted);font-family:inherit;font-size:.88rem;font-weight:500;text-align:left;cursor:pointer;transition:background-color .12s,border-color .12s,color .12s;line-height:1.4}.quiz-opt:hover:not(:disabled){background:color-mix(in srgb,var(--accent) 10%,var(--surface-elevated));border-color:var(--accent);color:var(--text)}.quiz-opt:disabled{cursor:default;opacity:.75}.quiz-opt.is-correct{background:color-mix(in srgb,var(--success-border) 12%,var(--surface-elevated));border-color:var(--success-border);color:var(--success-fg);opacity:1}.quiz-opt.is-wrong{background:color-mix(in srgb,var(--accent) 12%,var(--surface-elevated));border-color:var(--accent);color:var(--error-fg);opacity:1}.quiz-opt-letter{display:inline-flex;align-items:center;justify-content:center;min-width:1.25rem;height:1.25rem;border-radius:3px;background:color-mix(in srgb,var(--text-muted) 22%,var(--surface-elevated));color:var(--text);font-size:.68rem;font-weight:700;flex-shrink:0;transition:background-color .12s,color .12s}.quiz-opt:hover:not(:disabled) .quiz-opt-letter{background:color-mix(in srgb,var(--accent) 20%,var(--surface-elevated));color:var(--heading)}.quiz-opt.is-correct .quiz-opt-letter{background:var(--success-border);color:#fff}.quiz-opt.is-wrong .quiz-opt-letter{background:var(--accent);color:#fff}.quiz-hint-area{margin-top:.6rem;display:flex;flex-direction:column;gap:.4rem}.quiz-hint-btn{align-self:flex-start;background:none;border:1px dashed var(--border-muted);border-radius:var(--radius);color:var(--text-muted);font-family:inherit;font-size:.78rem;font-weight:600;padding:.25rem .65rem;cursor:pointer;transition:border-color .12s,color .12s}.quiz-hint-btn:before{content:"? "}.quiz-hint-btn:hover{border-color:var(--accent-soft);color:var(--accent-soft)}.quiz-hint-text{margin:0;padding:.5rem .75rem;background:color-mix(in srgb,var(--surface-elevated) 80%,transparent);border-left:2px solid var(--border-muted);border-radius:0 var(--radius) var(--radius) 0;font-size:.82rem;color:var(--text-muted);line-height:1.5;font-style:italic}.quiz-feedback{margin-top:1rem;padding:.75rem .9rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface-elevated);display:flex;flex-direction:column;gap:.5rem}.quiz-feedback.is-correct{border-color:var(--success-border);background:color-mix(in srgb,var(--success-border) 8%,var(--surface-elevated))}.quiz-feedback.is-wrong{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--surface-elevated))}.quiz-fb-label{margin:0;font-size:.85rem;font-weight:700;color:var(--text)}.quiz-feedback.is-correct .quiz-fb-label{color:var(--success-fg)}.quiz-feedback.is-wrong .quiz-fb-label{color:var(--error-fg)}.quiz-fb-text{margin:0;font-size:.84rem;color:var(--text-muted);line-height:1.55}.quiz-next{align-self:flex-start;margin-top:.25rem;padding:.15rem .75rem;min-height:32px;display:inline-flex;align-items:center;justify-content:center;background:transparent;border:1px solid var(--border-muted);border-radius:5px;color:var(--text-muted);font-family:inherit;font-size:.82rem;font-weight:700;cursor:pointer;transition:background-color .2s,border-color .2s,color .2s}.quiz-next:hover,.quiz-next:focus-visible{border-color:var(--text-muted);background:color-mix(in srgb,var(--border-muted) 15%,transparent);color:var(--text)}.quiz-feedback.is-correct .quiz-next{border-color:var(--success-border);color:var(--success-fg);animation:quiz-next-correct .4s ease forwards}.quiz-feedback.is-correct .quiz-next:hover,.quiz-feedback.is-correct .quiz-next:focus-visible{background:color-mix(in srgb,var(--success-border) 12%,transparent);border-color:var(--success-fg);color:var(--success-fg)}.quiz-feedback.is-wrong .quiz-next{border-color:var(--accent);color:var(--error-fg);animation:quiz-next-wrong .4s ease forwards}.quiz-feedback.is-wrong .quiz-next:hover,.quiz-feedback.is-wrong .quiz-next:focus-visible{background:color-mix(in srgb,var(--accent) 12%,transparent);border-color:var(--accent-hover);color:var(--error-fg)}@keyframes quiz-next-correct{0%{border-color:var(--border-muted);color:var(--text-muted)}to{border-color:var(--success-border);color:var(--success-fg)}}@keyframes quiz-next-wrong{0%{border-color:var(--border-muted);color:var(--text-muted)}to{border-color:var(--accent);color:var(--error-fg)}}.quiz-summary{display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:1.5rem 1rem;text-align:center}.quiz-score-display{font-size:3rem;font-weight:800;line-height:1;color:var(--heading);letter-spacing:-.02em}.quiz-score-sep{font-size:2rem;color:var(--text-muted);margin:0 .1rem;font-weight:400}.quiz-summary.is-perfect .quiz-score-display{color:var(--success-fg)}.quiz-score-text{margin:0;font-size:.88rem;color:var(--text-muted)}.quiz-score-text strong{color:var(--text)}.quiz-score-bar-wrap{width:100%;max-width:220px;height:6px;background:var(--surface-elevated);border-radius:999px;overflow:hidden}.quiz-score-bar{height:100%;background:var(--accent);border-radius:999px;transition:width .5s ease}.quiz-summary.is-perfect .quiz-score-bar{background:var(--success-border)}.quiz-retake{padding:.4rem 1.1rem;background:transparent;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-muted);font-family:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:border-color .12s,color .12s;margin-top:.25rem}.quiz-retake:hover{border-color:var(--accent);color:var(--accent)}@media(max-width:500px){.quiz{padding:1rem .9rem 1.2rem}.quiz-meta{margin-left:0}}