.quiz-shell{margin-top:24px}.quiz-progress{margin-bottom:14px}.quiz-progress-copy{color:var(--ink-soft);font-family:var(--mono);justify-content:space-between;gap:16px;margin-bottom:8px;font-size:11px;display:flex}.quiz-progress progress{background:var(--paper-deep);width:100%;height:5px;accent-color:var(--primary);border:0;border-radius:999px;display:block;overflow:hidden}.quiz-progress progress::-webkit-progress-bar{background:var(--paper-deep)}.quiz-progress progress::-webkit-progress-value{background:var(--primary)}.quiz-card{border:1px solid var(--line);background:#ffffffb8;padding:28px;position:relative}.quiz-card-meta{color:var(--ink-soft);font-family:var(--mono);letter-spacing:.06em;justify-content:space-between;gap:16px;font-size:10px;display:flex}.quiz-stem{max-width:720px;font-family:var(--serif);margin:18px 0 24px;font-size:clamp(22px,3vw,30px);font-weight:700;line-height:1.5}.quiz-options{border:0;gap:9px;margin:0;padding:0;display:grid}.quiz-option{border:1px solid var(--line);background:var(--white);cursor:pointer;align-items:flex-start;gap:12px;min-height:52px;padding:13px 15px;transition:border-color .14s,background .14s;display:flex}.quiz-option:hover{border-color:var(--line-strong);background:#fbfdfb}.quiz-option input{width:18px;height:18px;accent-color:var(--primary);flex:none;margin:3px 0 0}.quiz-option-key{min-width:18px;color:var(--primary-deep);font-family:var(--mono);font-size:12px;font-weight:700}.quiz-option>span:last-child{line-height:1.6}.quiz-option-tag{color:var(--primary-deep);font-family:var(--mono);white-space:nowrap;border:1px solid;margin-left:auto;padding:1px 5px;font-size:9px}.quiz-submit,.quiz-next{border:1px solid var(--primary);background:var(--primary);min-height:46px;color:var(--white);cursor:pointer;border-radius:2px;justify-content:center;align-items:center;margin-top:20px;padding:0 18px;font-weight:600;display:inline-flex}.quiz-submit:hover,.quiz-next:hover{background:var(--primary-deep)}.quiz-submit:disabled{border-color:var(--line);background:var(--paper-deep);color:var(--ink-soft);cursor:not-allowed}.quiz-nav{flex-wrap:wrap;gap:10px;margin-top:20px;display:flex}.quiz-nav .quiz-next{border-color:var(--accent);color:var(--accent-ink);background:0 0;margin-top:0}.quiz-nav-hint{color:var(--ink-soft);margin:14px 0 0;font-size:12px}.quiz-nav-button{border:1px solid var(--line-strong);min-height:46px;color:var(--primary-deep);cursor:pointer;background:0 0;border-radius:2px;justify-content:center;align-items:center;padding:0 16px;font-weight:600;display:inline-flex}.quiz-nav-button:disabled{border-color:var(--line);color:var(--ink-soft);cursor:not-allowed;opacity:.55}.quiz-submit:focus-visible,.quiz-next:focus-visible,.quiz-secondary-link:focus-visible,.quiz-option:focus-within{outline:2px solid var(--accent);outline-offset:3px}.quiz-answer{border-left:3px solid var(--line-strong);background:var(--paper);margin-top:22px;padding:22px}.quiz-verdict{font-family:var(--serif);margin:0 0 14px;font-size:20px;font-weight:700}.quiz-gap{color:var(--alert);margin:8px 0;font-size:14px}.quiz-reference,.quiz-explanation,.quiz-sources{margin-top:16px}.quiz-reference>span,.quiz-explanation>span,.quiz-sources>span{color:var(--ink-soft);font-family:var(--mono);letter-spacing:.08em;margin-bottom:5px;font-size:10px;display:block}.quiz-reference strong{font-size:15px;line-height:1.7}.quiz-explanation p{color:var(--ink);margin:0;font-size:15px;line-height:1.8}.quiz-sources ul{gap:7px;margin:0;padding:0;list-style:none;display:grid}.quiz-sources li{color:var(--ink-soft);flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;display:flex}.source-badge{border:1px solid var(--line);min-height:20px;font-family:var(--mono);align-items:center;padding:1px 6px;font-size:10px;display:inline-flex}.quiz-discrepancy{background:#fff5f4;border:1px solid #b6413c59;margin-top:18px;padding:12px 14px}.quiz-discrepancy strong{color:var(--alert);font-size:13px}.quiz-discrepancy p{color:#74302c;margin:5px 0 0;font-size:13px;line-height:1.7}.quiz-count{color:var(--ink-soft);font-family:var(--mono);font-size:11px;position:absolute;bottom:20px;right:28px}.quiz-short-answer{gap:8px;display:grid}.quiz-short-answer>span{color:var(--ink-soft);font-size:13px}.quiz-short-answer textarea{border:1px solid var(--line);background:var(--white);width:100%;color:var(--ink);font:inherit;resize:vertical;border-radius:0;padding:12px 14px;line-height:1.7}.quiz-short-answer textarea:focus{outline:2px solid var(--accent);outline-offset:2px}.quiz-finish{border:1px solid var(--line);background:linear-gradient(135deg,#fff 0%,#edf5f0 100%);padding:32px}.quiz-eyebrow{color:var(--primary);font-family:var(--mono);letter-spacing:.08em;margin:0;font-size:11px}.quiz-finish h3{font-family:var(--serif);margin:16px 0 4px;font-size:clamp(28px,4vw,42px);line-height:1.2}.quiz-accuracy{color:var(--primary-deep);margin:0;font-size:17px;font-weight:600}.quiz-finish-note{max-width:560px;color:var(--ink-soft);margin:16px 0 0}.quiz-finish-actions{flex-wrap:wrap;align-items:center;gap:16px;margin-top:8px;display:flex}.quiz-secondary-link{min-height:44px;color:var(--primary-deep);text-underline-offset:3px;align-items:center;text-decoration:underline;display:inline-flex}.quiz-empty{border:1px dashed var(--line-strong);color:var(--ink-soft);background:#ffffff80;gap:4px;padding:28px;display:grid}.quiz-memory-aid{background:#ffffff75;border:1px solid #2f6bff29;border-radius:14px;margin-top:16px}.quiz-memory-aid summary{min-height:40px;color:var(--primary-deep);cursor:pointer;padding:8px 12px;font-size:12px;font-weight:700;list-style:none}.quiz-memory-aid summary::-webkit-details-marker{display:none}.quiz-memory-aid summary:after{float:right;color:var(--primary);content:"+"}.quiz-memory-aid[open] summary:after{content:"−"}.quiz-memory-aid p{color:var(--ink-soft);margin:0;padding:0 12px 12px;font-size:13px;line-height:1.75}.quiz-memory-link{color:var(--primary-deep);text-underline-offset:3px;margin:0 12px 10px;font-size:12px;text-decoration:underline;display:inline-block}.quiz-memory-link:hover{color:var(--primary)}.quiz-empty strong{color:var(--ink)}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@media (width<=680px){.quiz-card,.quiz-finish{padding:20px}.quiz-count{bottom:16px;right:20px}}.practice-page{max-width:920px;padding:64px 0 84px}.practice-heading h1{font-family:var(--serif);margin:0;font-size:clamp(36px,5vw,60px);line-height:1.18}.practice-heading>p:last-of-type{max-width:680px;color:var(--ink-soft);margin:18px 0 0}.practice-setup{border-top:2px solid var(--ink);margin-top:34px}.practice-filter-group{border:0;border-bottom:1px solid var(--line);margin:0;padding:22px 0}.practice-filter-group legend,.practice-order legend{color:var(--ink-soft);font-family:var(--mono);letter-spacing:.08em;padding:0;font-size:10px}.practice-check-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:7px;margin-top:12px;display:grid}.practice-check-grid label,.practice-order label{border:1px solid var(--line);cursor:pointer;background:#ffffff8c;align-items:center;gap:9px;min-height:44px;padding:8px 10px;font-size:13px;display:flex}.practice-check-grid label:hover,.practice-order label:hover{border-color:var(--line-strong)}.practice-check-grid input,.practice-order input{width:16px;height:16px;accent-color:var(--primary);flex:none}.practice-hint{color:var(--ink-soft);margin:9px 0 0;font-size:12px}.practice-row{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:end;gap:28px;padding:22px 0;display:flex}.practice-count{color:var(--ink-soft);font-family:var(--mono);letter-spacing:.08em;gap:7px;font-size:10px;display:grid}.practice-count select{border:1px solid var(--line);background:var(--white);min-width:150px;min-height:44px;color:var(--ink);font:inherit;border-radius:0;padding:0 10px}.practice-order{border:0;align-items:center;gap:7px;margin:0;padding:0;display:flex}.practice-order legend{margin-bottom:7px}.practice-order label{min-height:40px}.practice-source{border-bottom:1px solid var(--line);flex-wrap:wrap;padding:18px 0}.practice-source label{min-height:40px}.practice-wrong-only{min-height:44px;color:var(--ink-soft);align-items:center;gap:9px;font-size:13px;display:flex}.practice-wrong-only input{width:16px;height:16px;accent-color:var(--primary)}.practice-start-row{justify-content:space-between;align-items:center;gap:20px;margin-top:18px;display:flex}.practice-match{color:var(--ink-soft);font-family:var(--mono);margin:0;font-size:11px}.practice-session{margin-top:30px}.practice-session-bar{border-bottom:1px solid var(--line);color:var(--ink-soft);font-family:var(--mono);letter-spacing:.06em;justify-content:space-between;align-items:center;gap:16px;padding-bottom:10px;font-size:10px;display:flex}.practice-exit{color:var(--ink-soft);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:4px 0;text-decoration:underline}.practice-page{padding:42px}@media (width<=680px){.practice-page{padding:42px 0 58px}.practice-check-grid{grid-template-columns:1fr 1fr}.practice-row{align-items:start;gap:18px;display:grid}.practice-start-row{flex-direction:column;align-items:flex-start}}.quiz-card{backdrop-filter:blur(22px)saturate(140%);background:linear-gradient(145deg,#ffffffc2,#eefaff7a);border:1px solid #ffffffeb;border-radius:26px;box-shadow:0 26px 60px #2f6bff21,inset 0 1px #fffffff5}.quiz-card-meta,.quiz-count,.quiz-progress-copy{color:#607594}.quiz-stem{letter-spacing:-.025em;font-weight:800}.quiz-option{background:#ffffffad;border-color:#2f6bff29;border-radius:14px;box-shadow:inset 0 1px #ffffffe6}.quiz-option:hover{background:#ffffffdb;border-color:#2f6bff61}.quiz-option:has(input:checked){border-color:var(--primary);background:linear-gradient(135deg,#2f6bff1a,#18c9e61a)}.quiz-option[data-correct=true],.quiz-option[data-correct=true]:has(input:checked){border-color:var(--success);background:var(--success-bg)}.quiz-option[data-wrong=true],.quiz-option[data-wrong=true]:has(input:checked){border-color:var(--alert);background:var(--danger-bg)}.quiz-option-tag{color:var(--success);border-radius:999px}.quiz-option-tag.is-wrong{color:var(--alert)}.quiz-submit{background:linear-gradient(135deg,#2557e6,#0ea5c4);border-color:#0000;border-radius:14px;box-shadow:0 14px 28px #2f6bff3d}.quiz-submit:hover{background:linear-gradient(135deg,#1e49c7,#0da8c4)}.quiz-submit:disabled{color:#71829c;box-shadow:none;background:#e1f1fbb8;border-color:#2f6bff1f}.quiz-next{background:linear-gradient(135deg,#2557e6,#0ea5c4);border-color:#0000;border-radius:14px;box-shadow:0 12px 26px #2f6bff33}.quiz-next:hover{background:linear-gradient(135deg,#1e49c7,#0da8c4)}.quiz-nav-button{color:var(--primary-deep);background:#ffffff6b;border-color:#2f6bff4d;border-radius:14px}.quiz-nav-button:hover:not(:disabled){border-color:var(--primary);background:#ffffffb8}.quiz-nav .quiz-next{border-color:var(--accent);color:var(--accent-ink);box-shadow:none;background:#ffffff61}.quiz-nav .quiz-next:hover{background:#18c9e61f}.quiz-nav-hint{color:#607594}.quiz-answer{background:#ffffff8f;border-radius:18px;box-shadow:inset 0 1px #ffffffdb}.quiz-answer.is-correct{border-left-color:var(--success)}.quiz-answer.is-wrong{border-left-color:var(--alert)}.is-correct .quiz-verdict{color:var(--success)}.is-wrong .quiz-verdict,.quiz-gap{color:var(--alert)}.source-badge{border-radius:999px}.source-courseware{color:var(--primary-deep);background:#2f6bff12;border-color:#2f6bff47}.source-textbook{color:#5b42cf;background:#7a5cff12;border-color:#7a5cff4d}.source-external{color:var(--accent-ink);background:#18c9e614;border-color:#18c9e65c}.source-past_exam{color:var(--alert);background:#e0566b14;border-color:#e0566b5c}.quiz-discrepancy{background:#fff0f3d1;border-color:#e0566b47;border-radius:14px}.quiz-finish{backdrop-filter:blur(22px);background:linear-gradient(135deg,#ffffffc7,#e3f8ff7a);border:1px solid #ffffffeb;border-radius:26px;box-shadow:0 26px 62px #2f6bff24,inset 0 1px #fffffff5}.quiz-finish h3{letter-spacing:-.03em;font-weight:800}.quiz-accuracy{color:var(--primary-deep)}.quiz-empty{background:#ffffff75;border-radius:18px}.practice-filter-group{border-bottom-color:#2f6bff24}.practice-check-grid label,.practice-order label{background:#ffffff80;border-color:#2f6bff29;border-radius:12px}.practice-check-grid label:hover,.practice-order label:hover{background:#ffffffbf;border-color:#2f6bff5c}.practice-check-grid label:has(input:checked),.practice-order label:has(input:checked){border-color:var(--primary);background:linear-gradient(135deg,#2f6bff1a,#18c9e61a)}.practice-count select{background:#fff9;border-color:#2f6bff2e;border-radius:12px}.practice-wrong-only{color:#607594}.practice-start-row .quiz-submit{margin-top:0}.practice-session-bar{color:#607594;border-bottom-color:#2f6bff29}.practice-exit{color:#607594}.practice-exit:hover{color:var(--primary-deep)}