:root{color-scheme:light;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;--ink:#20364b;--muted:#627486;--blue:#1767b5;--deep-blue:#124f8a;--line:#dce5ed;--paper:#f4f8fb;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0}a{color:var(--blue);text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid #62a6e6;outline-offset:4px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:absolute;top:-80px;left:24px;z-index:10;background:white;padding:10px 16px}.skip-link:focus{top:12px}
.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:1180px;margin:auto;min-height:82px;padding:18px 40px;display:flex;align-items:center;gap:38px}.site-name{display:inline-block;color:#263e55;text-decoration:none;font-size:24px;letter-spacing:-1px;line-height:1.2;font-weight:450;white-space:nowrap}.site-name span{color:var(--blue);font-weight:700}.site-header nav{display:flex;gap:29px;margin-left:40px}.site-header nav a{color:#647386;font-size:14px;text-decoration:none}.site-header nav a[aria-current=page]{color:#233d56;font-weight:600}.site-header nav a:hover,.signin-link:hover{text-decoration:underline}.signin-link{margin-left:auto;text-decoration:none;color:var(--blue);font-size:14px;font-weight:600;padding:7px 0}.preview-note{max-width:1100px;margin:16px auto -15px;font-size:12px;color:#76653e;line-height:1.6;padding:8px 12px;background:#fff9ea;border:1px solid #e8ddbd;border-radius:5px}
main{max-width:1180px;margin:auto;padding:0 40px}.practice-section{padding:57px 0 45px}.intro{display:flex;justify-content:space-between;align-items:flex-end;gap:35px;margin-bottom:30px}.intro-label{color:#627486;font-size:13px;margin:0 0 14px}.intro h1{font-size:43px;line-height:1.18;letter-spacing:-1.5px;font-weight:600;margin:0;color:#233e56}.intro h1 span{color:#527c9d;font-weight:450}.intro-copy{font-size:15px;line-height:1.9;color:var(--muted);margin:0 0 5px;max-width:330px}
.practice-card{background:white;border:1px solid #d9e3eb;border-radius:11px;box-shadow:0 9px 30px #234a6b07;overflow:hidden;scroll-margin-top:28px}.card-heading{padding:27px 31px 0}.card-heading h2{font-size:21px;font-weight:600;line-height:1.4;letter-spacing:-.4px;margin:0 0 5px;color:#253e55}.card-heading p{color:var(--muted);font-size:14px;margin:0}.practice-card form{padding:22px 31px 26px}.exam-field{border:0;padding:0;margin:0;min-width:0}.step-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.step-option{position:relative;display:flex;align-items:flex-start;gap:13px;min-height:123px;padding:19px 19px 18px;border:1px solid #d8e2eb;border-radius:7px;cursor:pointer;background:#fff;transition:border-color .12s,background .12s}.step-option:hover{border-color:#87b0d4}.step-option:has(input:checked){background:#f0f6fc;border-color:#4b8ec9;box-shadow:inset 0 0 0 1px #4b8ec9}.step-option:has(input:focus-visible){outline:3px solid #62a6e6;outline-offset:3px}.step-option input{margin:5px 0 0;accent-color:var(--blue);width:16px;height:16px;flex-shrink:0}.step-content strong{display:block;font-size:19px;font-weight:600;letter-spacing:-.25px;line-height:1.4;color:#254563}.step-content>span{display:block;color:#63798c;font-size:13px;line-height:1.6;margin-top:8px}.block-settings{display:grid;grid-template-columns:190px 1fr 220px;gap:20px;align-items:end;margin-top:24px}.block-settings label{display:flex;flex-direction:column;gap:7px;min-width:0;font-size:13px;font-weight:500;color:#51677b}.block-settings select{border:1px solid #cfdae5;border-radius:5px;min-height:45px;width:100%;padding:10px 12px;background:#fff;color:#2d485e;font-size:14px;font-weight:400}.start-button{width:100%;min-height:45px;padding:11px 20px;border:1px solid var(--blue);border-radius:5px;background:var(--blue);color:white;font-size:14px;font-weight:600;cursor:pointer}.start-button:hover{background:var(--deep-blue)}.start-button:disabled{background:#7296b8;border-color:#7296b8;cursor:wait}.card-foot{background:#fbfcfe;border-top:1px solid #e5ebf1;padding:15px 31px;display:flex;justify-content:space-between;gap:20px}.card-foot p{font-size:12px;color:#627486;line-height:1.7;margin:0}.card-foot a{font-weight:500;text-decoration:none;margin-left:5px}.card-foot a:hover{text-decoration:underline}.practice-note{font-size:12px;line-height:1.8;color:#627486;margin:17px 0 0;text-align:center}#startStatus{font-size:13px;color:#9a3232;line-height:1.7;margin:14px 0 0}#startStatus:empty{display:none}
.mission-section{display:grid;grid-template-columns:1fr 1.18fr;gap:100px;border-top:1px solid var(--line);padding:43px 0 45px}.section-label{font-size:12px;color:#6c8397;margin:0 0 12px}.mission-heading h2{font-size:29px;font-weight:500;line-height:1.3;letter-spacing:-.7px;color:#29445d;margin:0}.mission-copy{padding-top:4px}.mission-copy p{font-size:14px;line-height:1.9;color:#607285;margin:0 0 14px}.mission-copy p:last-child{margin:0}.questions-section{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.18fr;gap:100px;padding:39px 0 46px}.questions-heading h2{font-size:21px;font-weight:500;letter-spacing:-.35px;margin:0 0 9px;color:#29445d}.questions-heading p{font-size:13px;line-height:1.8;color:#627486;max-width:230px;margin:0}.source-notes{margin:0}.source-notes>div{margin-bottom:20px}.source-notes>div:last-child{margin:0}.source-notes dt{font-size:13px;font-weight:600;color:#435e75;margin-bottom:5px}.source-notes dd{font-size:13px;line-height:1.85;color:#627486;margin:0}.site-footer{max-width:1100px;margin:auto;border-top:1px solid var(--line);padding:26px 0 35px;display:flex;align-items:center;justify-content:space-between;gap:25px}.site-footer>div{display:flex;align-items:center;gap:27px}.site-footer .site-name{font-size:20px}.site-footer p{font-size:11px;line-height:1.8;color:#627486;margin:0}.site-footer>a{font-size:12px;text-decoration:none;color:#597891}
@media(max-width:1000px){.header-inner,main{padding-left:28px;padding-right:28px}.site-header nav{margin-left:10px;gap:21px}.site-header nav a{font-size:13px}.practice-section{padding-top:40px}.intro h1{font-size:39px}.card-heading{padding-left:25px;padding-right:25px}.practice-card form{padding-left:25px;padding-right:25px}.card-foot{padding-left:25px;padding-right:25px}.step-option{padding:17px 13px;gap:9px}.block-settings{grid-template-columns:160px 1fr 180px;gap:16px}.mission-section,.questions-section{gap:55px}.site-footer{margin:0 28px}.preview-note{margin-left:28px;margin-right:28px}}
@media(max-width:720px){.header-inner{flex-wrap:wrap;gap:18px;min-height:0;padding-top:20px;padding-bottom:15px}.site-header nav{order:3;flex-basis:100%;margin:0;gap:25px;padding-top:13px;border-top:1px solid #edf1f5}.site-header nav a{font-size:12px}.signin-link{padding:0}.practice-section{padding:31px 0}.intro{align-items:flex-start;flex-direction:column;gap:16px;margin-bottom:24px}.intro-label{font-size:12px;margin-bottom:11px}.intro h1{font-size:35px;letter-spacing:-1.1px}.intro-copy{font-size:14px;line-height:1.75;max-width:none}.intro-copy br{display:none}.step-choices{grid-template-columns:1fr;gap:10px}.step-option{min-height:0;padding:15px 17px;align-items:center;gap:13px}.step-option input{margin:0}.step-content{display:flex;align-items:center;gap:20px;width:100%}.step-content strong{font-size:17px;min-width:88px}.step-content>span{font-size:12px;margin:0;line-height:1.6}.card-heading{padding:23px 21px 0}.card-heading h2{font-size:20px}.card-heading p{font-size:13px;line-height:1.8}.practice-card form{padding:19px 21px 22px}.block-settings{grid-template-columns:1fr 1.3fr;gap:16px;margin-top:20px}.block-settings label{font-size:12px}.block-settings select{padding:10px 8px;font-size:12px}.start-button{grid-column:1/-1;min-height:46px}.card-foot{padding:14px 21px;flex-direction:column;gap:4px}.card-foot p{font-size:11px}.practice-note{text-align:left;font-size:11px;margin-top:14px}.mission-section,.questions-section{grid-template-columns:1fr;gap:22px;padding:30px 0}.mission-heading h2{font-size:27px}.mission-heading h2 br{display:none}.mission-copy{padding:0}.mission-copy p{font-size:13px}.questions-heading p{max-width:none}.source-notes dd{font-size:12px}.site-footer{padding:22px 0 28px;align-items:flex-start}.site-footer>div{align-items:flex-start;flex-direction:column;gap:10px}.site-footer p{font-size:10px}.preview-note{margin-top:12px;margin-bottom:0;font-size:11px}}
@media(max-width:380px){.header-inner,main{padding-left:20px;padding-right:20px}.site-name{font-size:22px}.site-header nav{gap:17px}.site-header nav a{font-size:11px}.intro h1{font-size:32px}.step-content{gap:12px}.step-content strong{font-size:16px;min-width:80px}.step-content>span{font-size:11px}.card-heading{padding:20px 17px 0}.practice-card form{padding:17px}.card-foot{padding:13px 17px}.site-footer{margin:0 20px}.preview-note{margin-left:20px;margin-right:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.step-option{transition:none}}

/* Prominent source attribution; retains the established medical-blue design. */
.source-intro{margin:0 0 28px;padding:0 0 0 18px;border-left:3px solid var(--blue);max-width:880px}
.source-intro h2{margin:0 0 8px;color:var(--ink);font-size:21px;line-height:1.4;letter-spacing:-.35px;font-weight:600}
.source-intro p{margin:0;color:#51677b;font-size:14px;line-height:1.8;max-width:820px}
.source-intro .source-independence{margin-top:8px;font-size:12px;color:var(--muted)}
@media(max-width:720px){.source-intro{margin-bottom:24px;padding-left:14px}.source-intro h2{font-size:19px}.source-intro p{font-size:13px}.source-intro .source-independence{font-size:11px}}