/* All additions belong to the MRI practice page. Shared styles stay untouched. */
.quiz-page {padding:0 0 65px;}
.quiz-page [hidden] {display:none!important;}
.quiz-breadcrumb {padding-top:27px;font-size:12px;color:var(--muted);}
.quiz-breadcrumb ol {display:flex;flex-wrap:wrap;gap:9px;list-style:none;margin:0;padding:0;}
.quiz-breadcrumb li+li:before {content:'/';margin-right:9px;color:#82928b;}
.quiz-hero {display:grid;grid-template-columns:minmax(0,1.6fr) minmax(250px,.7fr);gap:55px;align-items:center;padding:40px 0 43px;border-bottom:1px solid var(--line);}
.quiz-hero h1 {font:normal clamp(37px,4.3vw,59px)/1.1 var(--serif);letter-spacing:-1.5px;margin:18px 0 23px;}
.quiz-hero h1 em {font-style:normal;color:var(--orange);}
.quiz-deck {font-size:18px;line-height:1.75;color:var(--muted);max-width:650px;}
.quiz-byline {font-size:12px;color:var(--muted);line-height:1.8;}
.quiz-label {display:block;font-size:11px;font-weight:700;line-height:1.6;letter-spacing:.1em;text-transform:uppercase;color:#49685e;}
.quiz-intro-card {border:1px solid #c9d5ca;background:#edf1e9;padding:26px;}
.quiz-intro-card h2 {font:normal 28px/1.25 var(--serif);margin:13px 0 23px;}
.quiz-intro-card ul {list-style:none;padding:0;margin:0 0 23px;}
.quiz-intro-card li {padding:10px 0;border-top:1px solid #cbd6cb;font-size:13px;}
.quiz-intro-card a {font-size:13px;text-decoration:underline;text-underline-offset:4px;}
.quiz-layout {display:grid;grid-template-columns:minmax(0,760px) minmax(180px,250px);gap:64px;align-items:start;padding-top:37px;}
.quiz-main {min-width:0;}
.quiz-main p {font-size:16px;line-height:1.85;color:#435e54;}
.quiz-main h2 {font:normal clamp(27px,3vw,35px)/1.2 var(--serif);margin:0 0 22px;letter-spacing:-.4px;}
.quiz-main section {margin-bottom:43px;scroll-margin-top:25px;}
.quiz-main a:not(.btn) {text-decoration:underline;text-underline-offset:4px;}
.quiz-main .quiz-small {font-size:13px;line-height:1.8;}
.quiz-section-head {border-top:3px solid var(--ink);padding-top:24px;}
.quiz-section-head h2 {margin-top:10px;}
.quiz-progress {display:flex;align-items:center;justify-content:space-between;gap:15px;border-block:1px solid var(--line);padding:12px 0;margin:22px 0 28px;}
.quiz-progress p {margin:0;font-size:13px;font-weight:700;color:var(--ink);}
.quiz-page button {font:inherit;}
.quiz-progress button,.quiz-controls button:not(.btn) {background:transparent;color:var(--ink);border:1px solid #c2cfc4;padding:11px 14px;font-size:13px;min-height:44px;}
.quiz-question {border:0;border-bottom:1px solid var(--line);margin:0 0 33px;padding:0 0 28px;min-width:0;}
.quiz-question legend {width:100%;padding:0;margin:0 0 22px;}
.quiz-question:focus {outline:2px solid #a8411b;outline-offset:7px;}
.quiz-stem {display:block;font:normal 25px/1.45 var(--serif);margin-top:12px;color:var(--ink);}
.quiz-options {display:grid;gap:11px;}
.quiz-option {display:grid;grid-template-columns:20px 24px minmax(0,1fr);gap:9px;align-items:start;padding:16px;border:1px solid #c7d2c8;background:#fcfcf8;font-size:15px;line-height:1.65;cursor:pointer;}
.quiz-option input {appearance:auto;accent-color:#183b36;width:17px;height:17px;margin:5px 0 0;}
.quiz-option:has(input:checked) {border-color:var(--ink);background:#edf1e9;box-shadow:inset 3px 0 var(--ink);}
.quiz-option:has(input:focus-visible) {outline:2px solid #a8411b;outline-offset:3px;}
.quiz-letter {font-weight:700;color:#647b6e;}
.quiz-option-mark {grid-column:3;font-size:12px;font-weight:700;}
.quiz-option-mark:empty {display:none;}
.quiz-option[data-state=correct] {border:2px solid #49685e;background:#e8eee6;}
.quiz-option[data-state=incorrect] {border:2px dashed #a2522d;background:#f8f0e7;}
.quiz-answer-status {font-weight:700;}
.quiz-explanation {margin-top:20px;background:#f1f3ec;border:1px solid #ccd4c7;padding:17px 20px;}
.quiz-explanation summary {font-size:14px;font-weight:700;cursor:pointer;min-height:30px;}
.quiz-explanation h3 {font-size:14px;margin:22px 0 10px;}
.quiz-explanation ul {padding-left:20px;}
.quiz-explanation li {font-size:14px;line-height:1.8;margin-bottom:7px;color:#435e54;}
.quiz-controls {display:flex;flex-wrap:wrap;gap:11px;align-items:center;}
.quiz-controls .btn {font-size:13px;min-height:44px;padding:12px 16px;}
.quiz-controls button:disabled {opacity:.5;cursor:default;}
.quiz-error {padding:16px 19px;border:1px solid #ab5b35;background:#f8eee2;}
.quiz-results {border:1px solid #c3d0c2;border-top:3px solid var(--ink);padding:27px;background:#eef2e9;}
.quiz-results h2 {margin-top:10px;}
.quiz-main .quiz-results {margin-bottom:24px;}
.quiz-main .quiz-score {font:normal 39px/1.2 var(--serif);color:var(--ink);margin:0 0 16px;}
.quiz-topic-results {list-style:none;padding:0;}
.quiz-topic-results li {border-top:1px solid #c6d2c4;padding:13px 0;font-size:14px;}
.quiz-topic-results strong {display:block;}
.quiz-topic-results [data-topic-score] {display:block;font-size:13px;margin-top:4px;}
.quiz-topic-results a {display:inline-block;font-size:13px;margin-top:8px;}
.quiz-main .quiz-study {display:grid;grid-template-columns:135px minmax(0,1fr);gap:25px;margin:0 0 36px;border:1px solid #c6d0c0;border-top:3px solid var(--orange);padding:28px;background:#f5f3eb;}
.quiz-study-count {display:flex;flex-direction:column;align-items:flex-start;border-right:1px solid #d2d6ca;padding:9px 20px 0 0;}
.quiz-study-count strong {font:normal 70px/1 var(--serif);letter-spacing:-3px;color:var(--ink);}
.quiz-study-count>span {font-size:12px;line-height:1.7;margin-top:8px;color:#49685e;}
.quiz-study-count .quiz-study-format {font-size:10px;text-transform:uppercase;letter-spacing:.08em;border-top:1px solid #d2d6ca;padding-top:13px;margin-top:18px;}
.quiz-main .quiz-study h2 {font-size:30px;margin:10px 0 16px;}
.quiz-main .quiz-study-copy>p {font-size:15px;line-height:1.8;margin:0 0 16px;}
.quiz-study-features {display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;padding:0;margin:0 0 20px;font-size:12px;color:#49685e;}
.quiz-study-features li::before {content:'·';margin-right:7px;color:var(--orange);font-weight:700;}
.quiz-study .btn {font-size:13px;line-height:1.6;min-height:44px;margin:0 0 13px;padding:13px 17px;text-align:center;white-space:normal;}
.quiz-product-detail {display:inline-block;font-size:13px;}
.quiz-study .quiz-product-detail {display:block;width:fit-content;margin-bottom:16px;}
.quiz-main .quiz-study-copy>.quiz-small {font-size:12px;line-height:1.75;margin:0;color:var(--muted);}
.quiz-sidebar {position:sticky;top:25px;border-top:3px solid var(--ink);padding-top:23px;}
.quiz-sidebar h2 {font:normal 25px/1.3 var(--serif);margin:10px 0 18px;}
.quiz-sidebar p {font-size:13px;line-height:1.85;color:var(--muted);}
.quiz-sidebar>a {font-size:13px;text-decoration:underline;text-underline-offset:4px;}
.quiz-jumps {display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:7px;margin:22px 0;}
.quiz-jumps button {min-height:44px;min-width:0;border:1px solid #b9c9ba;background:transparent;color:var(--ink);font-size:13px;}
.quiz-jumps .is-answered {background:#183b36;color:white;}
.quiz-jumps [aria-current] {outline:2px solid var(--orange);outline-offset:1px;}
@media(max-width:1000px){.quiz-layout{gap:35px;grid-template-columns:minmax(0,1fr) 190px}.quiz-hero{gap:30px}.quiz-hero h1{font-size:46px}.quiz-intro-card{padding:21px}}
@media(max-width:800px){.quiz-hero{grid-template-columns:1fr}.quiz-layout{grid-template-columns:1fr}.quiz-sidebar{position:static;grid-row:1}.quiz-sidebar h2,.quiz-sidebar>p,.quiz-sidebar>a{display:none}.quiz-sidebar{padding:0;border:0}.quiz-jumps{grid-template-columns:repeat(8,minmax(0,1fr));margin:0}.quiz-layout{gap:25px}.quiz-hero h1{font-size:45px}.quiz-intro-card ul{margin-bottom:16px}}
@media(max-width:520px){.quiz-hero{padding:28px 0 30px;gap:23px}.quiz-hero h1{font-size:37px;letter-spacing:-1px}.quiz-deck{font-size:17px}.quiz-layout{padding-top:25px}.quiz-jumps{grid-template-columns:repeat(5,minmax(0,1fr))}.quiz-stem{font-size:23px}.quiz-option{padding:14px 11px;grid-template-columns:18px 17px minmax(0,1fr);gap:7px}.quiz-progress{align-items:flex-start;flex-direction:column;gap:10px}.quiz-results{padding:20px}.quiz-controls{gap:9px}.quiz-controls .btn,.quiz-controls button:not(.btn){padding:11px 12px;font-size:12px}.quiz-explanation{padding:16px}.quiz-page{padding-bottom:40px}.quiz-main .quiz-study{grid-template-columns:1fr;gap:20px;padding:22px}.quiz-study-count{display:grid;grid-template-columns:auto 1fr;column-gap:17px;align-items:center;border-right:0;border-bottom:1px solid #d2d6ca;padding:0 0 16px}.quiz-study-count strong{grid-row:1 / 3;font-size:62px}.quiz-study-count>span{margin:0}.quiz-study-count .quiz-study-format{border:0;padding:0;margin:0}.quiz-main .quiz-study h2{font-size:29px}.quiz-study .btn{display:block;width:100%}}
@media print{.quiz-sidebar,.quiz-controls,.quiz-progress,.quiz-study{display:none!important}.quiz-layout,.quiz-hero{display:block}.quiz-question{break-inside:avoid}}