.chapter-quiz-wrap{margin:48px 0 32px;padding:0}.chapter-quiz{background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:var(--radius);padding:28px;box-shadow:0 8px 24px var(--shadow);color:var(--text);font-family:var(--sans);transition:border-color .2s ease}.chapter-quiz:focus-within{border-top-color:var(--accent-hi)}.quiz-noscript{padding:20px;background:var(--surface-2);border-radius:8px;border-left:4px solid var(--accent)}.quiz-noscript h3{margin:0 0 8px;font-family:var(--serif);color:var(--text)}.quiz-noscript p{margin:0;color:var(--muted);font-size:15px}.quiz-header{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--line)}.quiz-header-text{flex:1;min-width:240px}.quiz-kicker{display:inline-block;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:6px}.quiz-title{margin:0 0 6px;font-family:var(--serif);font-size:24px;line-height:1.25;color:var(--text)}.quiz-subtitle{margin:0;font-size:14px;color:var(--muted);line-height:1.5}.quiz-badge-slot{display:flex;align-items:center;gap:8px}.quiz-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.02em;white-space:nowrap}.quiz-badge-mastered{background:color-mix(in srgb,var(--good) 20%,var(--surface));color:var(--good);border:1px solid var(--good)}.quiz-badge-progress{background:color-mix(in srgb,var(--accent) 18%,var(--surface));color:var(--accent-hi);border:1px solid var(--accent)}.quiz-badge-unattempted{background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}.quiz-intro-box{background:var(--surface-2);border-radius:10px;padding:24px;margin-bottom:24px;border:1px solid var(--line)}.quiz-intro-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:16px;margin:16px 0}.quiz-stat-item{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:12px 16px}.quiz-stat-label{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}.quiz-stat-val{display:block;font-size:20px;font-weight:700;color:var(--text);font-family:var(--serif)}.quiz-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:20px}.quiz-tracker{margin-bottom:20px}.quiz-tracker-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-size:13px;color:var(--muted)}.quiz-tracker-count{font-weight:600;color:var(--text)}.quiz-tracker-bar{width:100%;height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden;position:relative}.quiz-tracker-fill{height:100%;background:linear-gradient(90deg,var(--accent) 0%,var(--accent-hi) 100%);border-radius:999px;transition:width .35s ease}.quiz-question-card{margin-bottom:24px;animation:quizFadeIn .25s ease-out}@keyframes quizFadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.quiz-question-prompt{font-family:var(--serif);font-size:19px;line-height:1.45;color:var(--text);margin:0 0 20px}.quiz-options-list{display:grid;gap:10px;margin-bottom:20px}.quiz-option{display:flex;align-items:flex-start;gap:14px;padding:14px 18px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:all .15s ease;user-select:none;position:relative}.quiz-option:hover:not(.quiz-option-disabled){border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--surface-2));transform:translateX(2px)}.quiz-option.is-selected:not(.quiz-option-disabled){border-color:var(--accent);background:color-mix(in srgb,var(--accent) 15%,var(--surface-2));box-shadow:0 0 0 1px var(--accent)}.quiz-option-disabled{cursor:default}.quiz-option-indicator{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:999px;border:1.5px solid var(--line);background:var(--surface);color:var(--muted);font-size:12px;font-weight:700;flex-shrink:0;margin-top:1px;transition:all .15s ease}.quiz-option.is-selected .quiz-option-indicator{border-color:var(--accent);background:var(--accent);color:var(--ground)}.quiz-option-text{font-size:15px;line-height:1.45;color:var(--text);flex:1}.quiz-option.is-correct{border-color:var(--good)!important;background:color-mix(in srgb,var(--good) 15%,var(--surface-2))!important}.quiz-option.is-correct .quiz-option-indicator{border-color:var(--good)!important;background:var(--good)!important;color:var(--ground)!important}.quiz-option.is-incorrect{border-color:#d35e7e!important;background:color-mix(in srgb,#d35e7e 15%,var(--surface-2))!important;opacity:.85}.quiz-option.is-incorrect .quiz-option-indicator{border-color:#d35e7e!important;background:#d35e7e!important;color:var(--ground)!important}.quiz-explanation-box{margin-top:20px;padding:18px 20px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2);animation:quizSlideDown .25s ease-out}@keyframes quizSlideDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.quiz-explanation-box.is-correct{border-left:4px solid var(--good)}.quiz-explanation-box.is-incorrect{border-left:4px solid #d35e7e}.quiz-explanation-status{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;margin-bottom:8px}.quiz-explanation-box.is-correct .quiz-explanation-status{color:var(--good)}.quiz-explanation-box.is-incorrect .quiz-explanation-status{color:#d35e7e}.quiz-explanation-text{margin:0;font-size:14px;line-height:1.55;color:var(--text)}.quiz-summary-card{padding:24px;background:var(--surface-2);border-radius:12px;border:1px solid var(--line);text-align:center;margin-bottom:24px}.quiz-summary-icon{font-size:44px;margin-bottom:12px;display:inline-block}.quiz-summary-title{font-family:var(--serif);font-size:26px;margin:0 0 8px;color:var(--text)}.quiz-summary-score{font-size:36px;font-weight:800;font-family:var(--serif);color:var(--accent-hi);margin-bottom:6px}.quiz-summary-score-meta{font-size:15px;color:var(--muted);margin-bottom:16px}.quiz-review-list{text-align:left;margin:24px 0;display:grid;gap:14px}.quiz-review-item{padding:16px;border-radius:8px;background:var(--surface);border:1px solid var(--line)}.quiz-review-item.is-correct{border-left:3px solid var(--good)}.quiz-review-item.is-incorrect{border-left:3px solid #d35e7e}.quiz-review-q{font-weight:600;font-size:15px;margin-bottom:8px;color:var(--text)}.quiz-review-ans{font-size:13px;color:var(--muted);line-height:1.45}.quiz-review-ans strong{color:var(--text)}.series-progress-card{margin:28px 0;padding:24px;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:var(--radius);box-shadow:0 4px 16px var(--shadow)}.sp-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.sp-kicker{font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);font-weight:700;display:block}.sp-title{margin:4px 0 0;font-family:var(--serif);font-size:22px;color:var(--text)}.sp-badge{padding:4px 12px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line);font-size:13px;font-weight:600;color:var(--accent-hi)}.sp-bar-track{width:100%;height:8px;background:var(--surface-2);border-radius:999px;overflow:hidden;margin-bottom:16px}.sp-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent) 0%,var(--accent-hi) 100%);border-radius:999px;transition:width .4s ease}.sp-stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}.sp-stat{padding:10px 14px;background:var(--surface-2);border:1px solid var(--line);border-radius:8px;text-align:center}.sp-stat strong{display:block;font-size:18px;font-family:var(--serif);color:var(--text)}.sp-stat span{display:block;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-top:2px}.sp-actions{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:12px;border-top:1px solid var(--line)}.sp-reset-link{background:0 0;border:none;color:var(--muted);font-size:12px;text-decoration:underline;cursor:pointer;padding:0}.sp-reset-link:hover{color:var(--accent-hi)}.chapter-status-tag{display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;vertical-align:middle;letter-spacing:.02em}.chapter-status-tag.tag-mastered{background:color-mix(in srgb,var(--good) 20%,var(--surface));color:var(--good);border:1px solid var(--good)}.chapter-status-tag.tag-progress{background:color-mix(in srgb,var(--accent) 18%,var(--surface));color:var(--accent-hi);border:1px solid var(--accent)}@media(max-width:640px){.chapter-quiz{padding:20px 16px}.quiz-title{font-size:20px}.quiz-option{padding:12px 14px}.sp-stats-row{grid-template-columns:1fr}}