/* GrangeRN visual layer. Calculation arithmetic and the question bank stay unchanged. */
:root{--navy:#052861;--blue:#052861;--red:#3DC2FE;--ink:#1F2E4A;--muted:#465c78;--line:#c8d7e8}
body{background:#EAF2FA;font-family:Arial,Helvetica,sans-serif;line-height:1.6}
header{border-bottom:6px solid #3DC2FE}
.brand{gap:32px;padding:24px 28px}.brand img{width:230px;height:87px}.brand>div{padding-left:30px}.eyebrow{color:#3DC2FE;letter-spacing:.16em}.appTitle{font-weight:800;letter-spacing:-.025em}
h1{font-family:Arial,Helvetica,sans-serif;font-weight:800;letter-spacing:-.035em}h2,h3{letter-spacing:-.025em}input{font-family:Arial,Helvetica,sans-serif}
button{border-radius:7px;font-weight:700}.topic{border:2px solid #052861;border-radius:10px;box-shadow:5px 5px 0 #3DC2FE;transition:transform .15s,box-shadow .15s}.topic:hover{filter:none;transform:translateY(-2px);box-shadow:7px 7px 0 #3DC2FE}.topic:active{transform:translateY(1px)}.modeChoices .topic{padding:30px}.modeChoices b{font-size:1.45em}
main:has(#homeTitle){min-height:460px;padding-top:58px;padding-bottom:58px;padding-right:440px;background:url('assets/original-dosage.png') right 28px center/350px auto no-repeat}.modeChoices{grid-template-columns:1fr;gap:22px;margin-top:30px}.practicePrompt{font-size:clamp(30px,3.1vw,42px);max-width:600px}.panel{border-radius:10px;box-shadow:5px 5px 0 #c8ddf0}.side,.calcHandle{background:#EAF2FA}.secondary{border-width:2px}.topicBox{background:#f5f9fe}.tag{font-weight:800;letter-spacing:.025em}.feedback{border-radius:8px}.homeIcon svg path{stroke:#052861}.homeIcon svg path:nth-child(2){fill:#3DC2FE}.homeIcon svg path:nth-child(3){fill:#335B94}
footer{border-color:#c0d2e5}footer .footerCredit{font-family:Georgia,serif;font-size:1.1em}.timerBadge{background:#052861;border-color:#3DC2FE}.floatingCalc{border-radius:10px}.calcKeys button{background:#052861}.calcKeys button[data-key='=']{background:#3DC2FE;color:#052861}.calcKeys button[data-key='C']{background:#EAF2FA;color:#052861;border:1px solid #052861}
button:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #335B94;outline-offset:4px}header a:focus-visible{outline-color:#3DC2FE}
@media(max-width:900px){main:has(#homeTitle){padding-right:360px;background-size:285px}.brand img{width:200px;height:76px}.brand{gap:24px}.brand>div{padding-left:24px}}
@media(max-width:650px){.brand{gap:14px;padding:22px 20px;flex-wrap:wrap}.brand img{width:185px;height:70px}.brand>div{flex-basis:100%;border-left:0;border-top:1px solid #ffffff60;padding:16px 0 0}.appTitle{font-size:28px;margin-top:6px}.eyebrow{font-size:12px}main:has(#homeTitle){padding:30px 20px 285px;background-position:center bottom 12px;background-size:240px;min-height:0}.practicePrompt{font-size:32px}.modeChoices .topic{padding:24px}.modeChoices b{font-size:1.35em}.modeChoices{gap:20px}.panel{padding:22px 18px}.topic:hover{transform:none}.question{font-size:20px}footer{margin-top:12px}.actions button{min-height:48px}}
@media(prefers-reduced-motion:reduce){.topic{transition:none}.topic:hover{transform:none}}
/* Landing page v2. All selectors are scoped to the home state. */
.landingNav{display:none}body:has(#homeTitle){background:#fff}body:has(#homeTitle) .brand{justify-content:space-between;max-width:1220px;padding:18px 36px}body:has(#homeTitle) .brand img{width:210px;height:80px}body:has(#homeTitle) .brand>div{display:none}body:has(#homeTitle) header{border-bottom:0}body:has(#homeTitle) .landingNav{display:flex;gap:28px;font-size:15px;font-weight:700}.landingNav a{color:white;text-decoration:none;padding:12px 0}.landingNav a:hover{text-decoration:underline;text-underline-offset:6px}main:has(#homeTitle){background:none;max-width:none;padding:0;min-height:0}.landing{color:#1F2E4A}.landingHero{background:#EAF2FA;display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center;padding:64px max(36px,calc((100vw - 1148px)/2)) 66px}.landingKicker{font-size:12px;font-weight:800;letter-spacing:.16em;line-height:1.5;color:#335B94;margin:0 0 22px}.landingHero h1{font-size:clamp(54px,6.4vw,82px);letter-spacing:-.065em;line-height:.99;margin:0 0 28px;font-weight:800}.landingHero h1 span{color:#052861;text-decoration:underline;text-decoration-color:#3DC2FE;text-decoration-thickness:8px;text-underline-offset:9px}.heroLead{font-size:19px;line-height:1.6;max-width:490px;margin:0 0 28px}.landingActions{display:flex;align-items:center;gap:28px;flex-wrap:wrap}.landingButton{display:inline-flex;justify-content:center;align-items:center;gap:24px;background:#052861;color:white;text-decoration:none;padding:16px 23px;border:2px solid #052861;border-radius:5px;font:700 16px/1.4 Arial,Helvetica,sans-serif;min-height:56px;box-shadow:4px 4px 0 #3DC2FE;cursor:pointer}.landingButton:hover{filter:brightness(1.12)}.landingButton span[aria-hidden]{font-size:23px;line-height:1}.textLink{font-size:15px;font-weight:700;color:#052861;text-underline-offset:5px}.heroNote{font-size:13px;color:#465c78;margin:24px 0 0}.heroFigure{margin:0;position:relative}.heroFigure img{display:block;width:100%;height:auto;max-width:480px;margin:auto}.heroFigure figcaption{font-family:Georgia,serif;font-style:italic;font-size:19px;line-height:1.35;text-align:right;color:#052861;margin:4px 12px 0 0}.factStrip{display:grid;grid-template-columns:repeat(3,1fr);background:#3DC2FE;padding:28px max(36px,calc((100vw - 1148px)/2));gap:24px;border-top:2px solid #052861;border-bottom:2px solid #052861}.factStrip p{margin:0;display:flex;align-items:center;gap:15px}.factStrip strong{font-size:30px;letter-spacing:-.04em;color:#052861;line-height:1.1}.factStrip span{font-size:13px;line-height:1.35;max-width:105px}.modeSection{max-width:1220px;margin:auto;padding:84px 36px;display:grid;grid-template-columns:.8fr 1.6fr;gap:44px}.landing h2{font-size:clamp(32px,3.6vw,46px);line-height:1.06;letter-spacing:-.05em;margin:0 0 22px}.sectionIntro>p:last-child{font-size:16px;line-height:1.65}.landingModes{display:grid;grid-template-columns:1fr 1fr;gap:20px}.landingModes article{border:2px solid #052861;padding:28px 26px;display:flex;flex-direction:column;align-items:flex-start}.learningCard{background:#EAF2FA;box-shadow:6px 6px 0 #3DC2FE}.quizCard{background:#052861;color:white}.modeNumber{font-size:11px;letter-spacing:.13em;font-weight:800;margin:0 0 28px}.landingModes h3{font-size:27px;letter-spacing:-.04em;line-height:1.1;margin:0 0 16px}.quizCard h3{color:white}.landingModes p:not(.modeNumber):not(.modeFoot){font-size:15px;line-height:1.6;margin:0 0 26px}.landingModes .landingButton{font-size:14px;padding:12px 16px;gap:12px;margin-top:auto}.quizCard .landingButton{background:#3DC2FE;color:#052861;border-color:#3DC2FE;box-shadow:4px 4px 0 #335B94}.modeFoot{font-size:11px;margin:18px 0 0;line-height:1.4}.howSection{background:#f2f6fb;padding:70px max(36px,calc((100vw - 1148px)/2))}.sectionTop{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}.sectionTop h2{width:65%;margin-bottom:42px}.howGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.stepNumber{display:block;border-bottom:3px solid #3DC2FE;font-size:42px;font-weight:800;line-height:1;padding-bottom:18px;color:#335B94;margin-bottom:22px}.howGrid h3{font-size:22px;margin:0 0 12px;letter-spacing:-.03em}.howGrid p{font-size:16px;line-height:1.65;margin:0}.topicSection{max-width:1220px;margin:auto;padding:76px 36px}.topicSection h2{max-width:720px}.topicPills{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}.topicPills li{border:1.5px solid #052861;padding:10px 18px;border-radius:30px;font-size:14px;font-weight:700;background:#fff}.topicPills li:nth-child(3n+1){background:#EAF2FA}.tutorialSection{background:#052861;color:white;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:56px max(36px,calc((100vw - 1148px)/2))}.tutorialSection img{display:block;width:100%;height:auto;border:2px solid #3DC2FE}.tutorialSection .landingKicker{color:#3DC2FE}.tutorialSection h2{color:white}.tutorialSection p:not(.landingKicker){font-size:17px;line-height:1.65;margin-bottom:28px}.tutorialSection .landingButton{background:#3DC2FE;color:#052861;border-color:#3DC2FE;box-shadow:4px 4px 0 #335B94}body:has(#homeTitle) footer{margin:0 auto;padding-top:30px;border:0}body:has(#homeTitle) #homeTutorials{display:none}.landing section[id]{scroll-margin-top:24px}
@media(max-width:1000px){.landingHero{grid-template-columns:1.1fr 1fr;padding-top:46px;padding-bottom:46px}.landingHero h1{font-size:60px}.heroLead{font-size:17px}.modeSection{grid-template-columns:1fr;gap:24px}.sectionIntro{max-width:600px}.sectionIntro h2 br{display:none}.factStrip p{display:block}.factStrip strong,.factStrip span{display:block}.factStrip span{max-width:none;margin-top:6px}.tutorialSection{gap:30px}}
@media(max-width:650px){body:has(#homeTitle) .brand{padding:14px 22px;gap:8px;display:block}body:has(#homeTitle) .brand img{width:175px;height:65px}body:has(#homeTitle) .landingNav{gap:25px;font-size:13px;margin-top:5px}.landingNav a{padding:8px 0}.landingHero{grid-template-columns:1fr;padding:38px 22px 28px;gap:22px}.landingHero h1{font-size:57px;margin-bottom:28px}.landingHero h1 span{text-decoration-thickness:6px;text-underline-offset:7px}.landingKicker{font-size:10px;letter-spacing:.13em;margin-bottom:18px}.heroLead{font-size:17px;margin-bottom:24px}.landingActions{gap:24px}.landingButton{font-size:15px;padding:14px 18px;gap:20px}.heroNote{margin-top:20px}.heroFigure img{max-width:320px}.heroFigure figcaption{font-size:17px;margin:0 8px 0 0}.factStrip{padding:24px 22px;gap:13px;grid-template-columns:1fr 1fr 1.2fr}.factStrip strong{font-size:26px}.factStrip span{font-size:11px}.modeSection{padding:48px 22px;gap:24px}.landing h2{font-size:36px}.landingModes{grid-template-columns:1fr;gap:24px}.landingModes article{padding:28px}.modeNumber{margin-bottom:20px}.landingModes h3{font-size:29px}.landingModes p:not(.modeNumber):not(.modeFoot){font-size:16px}.landingModes .landingButton{font-size:15px;min-height:52px}.modeFoot{font-size:12px}.howSection{padding:46px 22px}.sectionTop{display:block}.sectionTop h2{width:auto;margin-bottom:34px}.howGrid{grid-template-columns:1fr;gap:28px}.stepNumber{font-size:34px;padding-bottom:12px;margin-bottom:16px}.howGrid h3{font-size:24px}.topicSection{padding:48px 22px}.topicPills{gap:9px}.topicPills li{font-size:13px;padding:8px 13px}.tutorialSection{grid-template-columns:1fr;padding:36px 22px 44px;gap:32px}.tutorialSection>img{max-width:440px}.tutorialSection p:not(.landingKicker){font-size:16px}.landing .landingButton{width:auto}body:has(#homeTitle) footer{padding:22px}.landing section[id]{scroll-margin-top:18px}}
.tutorialType{font-size:clamp(60px,6vw,90px);font-weight:800;letter-spacing:-.065em;line-height:1.03;color:#fff}.tutorialType span{color:#3DC2FE}.heroFigure img{border-radius:8px}@media(max-width:650px){.tutorialType{font-size:62px}}
/* V3: simplified landing page following annotated reference. */
.landingActions{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:430px;scroll-margin-top:24px}.landingActions .landingButton{padding:16px 18px}.landingActions .quizHeroButton{background:#3DC2FE;color:#052861;box-shadow:4px 4px 0 #335B94}.landingHero{padding-bottom:64px}.tutorialSection{border-top:3px solid #3DC2FE}@media(max-width:650px){.landingActions{gap:12px;max-width:none}.landingActions .landingButton{width:100%;padding:14px 10px;font-size:15px}.landingHero{padding-bottom:32px}}
/* Accessibility fixes preserve question allocation, scoring and timer logic. */
.practiceSkip{position:absolute;left:-10000px;top:10px;z-index:1000;background:white;color:#052861;padding:12px 16px;font-weight:700;border:2px solid #052861}.practiceSkip:focus{left:10px}button:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #052861;outline-offset:4px;box-shadow:0 0 0 6px white}header a:focus-visible{outline-color:#3DC2FE;box-shadow:0 0 0 6px #052861}.chainViewport{overflow-x:auto;overflow-y:visible;max-width:100%;padding:6px 0}.chainViewport:focus-visible{outline-offset:1px}.guideOnline{display:inline-flex;align-items:center;min-height:44px;justify-self:start}.guideDownloadButton{grid-column:2;grid-row:1}.guideOnline{grid-column:2;grid-row:2}.guideDownload>div{grid-row:1/3}.guideDownload{row-gap:12px}@media(max-width:750px){.guideDownloadButton,.guideOnline,.guideDownload>div{grid-column:1;grid-row:auto}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* Preserve reflow with user letter/word-spacing overrides. */
.landingHero>*,.tutorialSection>*{min-width:0}.landing h1,.landing h2,.landing h3,.tutorialType{overflow-wrap:anywhere}.landingNav{flex-wrap:wrap}
.guideDownload{max-width:1148px;margin:28px auto}@media(max-width:1220px){.guideDownload{margin:28px 36px}}@media(max-width:650px){.guideDownload{margin:24px 22px}}