/* Pass the License
   Identity: an exam answer sheet. White paper, booklet navy, highlighter yellow,
   and fill-in bubbles for answers. Bricolage Grotesque for headings, Atkinson Hyperlegible for reading. */
:root{
  --paper:#ffffff; --wash:#eef1f8; --ink:#141b3d; --muted:#525b78; --line:#d9deea;
  --navy:#1d2b6b; --navy-2:#2a3c8f; --link:#2a43c0; --hl:#ffe14d; --hl-2:#ffd21f;
  --on-navy:#ffffff; --on-navy-muted:#c4ccec;
  --ok:#137a4b; --ok-bg:#e2f3e9; --bad:#c42d24; --bad-bg:#fde8e6;
  --pencil:#1d2b6b;
  --head:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;
  --body:"Atkinson Hyperlegible",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#0d1330; --wash:#141c41; --ink:#e9ecf8; --muted:#a6aecb; --line:#29325e;
    --navy:#18235a; --navy-2:#24348a; --link:#9fb0ff;
    --on-navy-muted:#b9c2e6;
    --ok:#5fd394; --ok-bg:#12362a; --bad:#ff8a80; --bad-bg:#3d1a1c;
    --pencil:#c9d2ff;
  }
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--hl-2);outline-offset:2px;border-radius:4px}
img{max-width:100%}
.wrap{max-width:1040px;margin:0 auto;padding:0 18px}
.narrow{max-width:700px}
h1,h2,h3{font-family:var(--head);font-weight:800;letter-spacing:-.02em;line-height:1.08;margin:0;color:inherit}
h2{font-size:clamp(26px,4vw,34px)}
h3{font-size:20px;font-weight:700}
[hidden]{display:none!important}
.skip{position:absolute;left:-999px}
.skip:focus{left:16px;top:8px;background:var(--paper);padding:8px 12px;z-index:9}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* header */
header.top{background:var(--paper);border-bottom:2px solid var(--ink);position:sticky;top:0;z-index:5}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:62px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--head);font-weight:800;font-size:21px;letter-spacing:-.02em;color:var(--ink);white-space:nowrap}
.logo .mark{display:block;flex:none}
nav.main{display:flex;align-items:center;gap:2px}
nav.main a{text-decoration:none;color:var(--ink);font-size:15px;font-weight:700;padding:8px 11px;border-radius:8px}
nav.main a:hover{background:var(--wash)}
nav.main a[aria-current="page"]{text-decoration:underline;text-decoration-color:var(--hl-2);text-decoration-thickness:4px;text-underline-offset:7px}
nav.main a.cta{background:var(--hl);color:#141b3d;margin-left:8px;border:2px solid #141b3d}
nav.main a.cta:hover{background:var(--hl-2)}
.menu-btn{display:none;background:none;border:2px solid var(--ink);border-radius:8px;color:var(--ink);font:inherit;font-size:15px;font-weight:700;padding:6px 12px;cursor:pointer}
@media (max-width:760px){
  .menu-btn{display:block}
  nav.main{display:none;position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:2px solid var(--ink);flex-direction:column;align-items:stretch;padding:8px 18px 16px}
  nav.main.open{display:flex}
  nav.main a{padding:12px 6px;font-size:17px}
  nav.main a.cta{margin:8px 0 0;text-align:center}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:10px;border:2px solid var(--navy);background:var(--navy);color:#fff;font:inherit;font-weight:700;font-size:16px;cursor:pointer;text-decoration:none;line-height:1.2}
.btn:hover{background:var(--navy-2);border-color:var(--navy-2);color:#fff;text-decoration:none}
.btn.go{background:var(--hl);color:#141b3d;border-color:#141b3d;box-shadow:3px 3px 0 #141b3d}
.btn.go:hover{background:var(--hl-2);color:#141b3d}
.btn.go:active{transform:translate(2px,2px);box-shadow:1px 1px 0 #141b3d}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--ink);background:transparent;color:var(--ink)}
.btn.block{width:100%}
.btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}
@media (prefers-color-scheme: dark){.btn{background:#2f44b0;border-color:#2f44b0}.btn:hover{background:#3b52c8;border-color:#3b52c8}.btn.ghost{border-color:var(--line)}}
.actions{display:flex;gap:10px;flex-wrap:wrap}

/* home hero */
.hero{background:var(--navy);color:var(--on-navy);padding:52px 0 58px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr;gap:34px}}
.hero h1{font-size:clamp(38px,6.4vw,64px);max-width:12ch}
.hero .lede{color:var(--on-navy-muted);font-size:19px;margin:18px 0 26px;max-width:36ch}
.state-pick label{display:block;font-weight:700;margin-bottom:8px}
.state-pick .row{display:flex;gap:10px;flex-wrap:wrap}
.state-pick select{flex:1 1 200px;min-width:0;padding:13px 12px;border-radius:10px;border:2px solid #fff;background:#fff;color:#141b3d;font:inherit;font-size:16px}
.hero .small{font-size:15px;color:var(--on-navy-muted);margin:14px 0 0}
.hero .small a{color:#fff}
.sample{background:var(--paper);color:var(--ink);border-radius:16px;padding:22px;box-shadow:8px 8px 0 rgba(0,0,0,.28)}
.sample .tag{font-size:14px;color:var(--muted);margin:0 0 8px}
.sample .qtext{font-size:18px}
.sample .after{margin-top:14px;font-size:15px}

/* page heads + sections */
.page-head{padding:30px 0 20px}
.page-head h1{font-size:clamp(32px,5.6vw,50px);margin:10px 0 12px;max-width:20ch}
.lede{color:var(--muted);font-size:19px;margin:0;max-width:60ch}
.crumbs{font-size:14px;color:var(--muted)}
.crumbs a{color:var(--muted)}
section.block{margin:56px 0}
section.block > h2{margin-bottom:8px}
section.block > .sub{color:var(--muted);margin:0 0 18px;max-width:60ch}
.band{background:var(--wash);padding:8px 0;margin:56px 0}
.band section.block{margin:44px 0}
.card{background:var(--paper);border:2px solid var(--ink);border-radius:14px;padding:22px}
.prose{font-size:17px}
.prose h2{font-size:24px;margin:30px 0 8px}
.prose p,.prose ul{margin:0 0 12px}
.muted{color:var(--muted)}
.ad-slot{display:none}
.note{color:var(--muted);font-size:15px;margin-top:14px}

/* states: rows that start with a filled bubble holding the state code */
.states{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:0 28px;border-top:2px solid var(--ink)}
.states a{display:flex;align-items:center;gap:14px;padding:13px 2px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}
.states a:hover .nm{text-decoration:underline;text-decoration-color:var(--hl-2);text-decoration-thickness:4px;text-underline-offset:4px}
.states .code{flex:none;width:42px;height:42px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-family:var(--head);font-weight:800;font-size:15px;letter-spacing:.02em}
.states .nm{font-weight:700;font-size:17px}
.states .ct{margin-left:auto;color:var(--muted);font-size:14px;white-space:nowrap}
@media (prefers-color-scheme: dark){.states .code{background:#2f44b0}}

/* exams */
.exams{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.exam{display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:14px;border:2px solid var(--ink);background:var(--paper);text-decoration:none;color:var(--ink)}
a.exam:hover{background:var(--wash)}
.exam h3{font-size:22px}
.exam p{margin:0;color:var(--muted);font-size:15px}
.exam .go{margin-top:auto;padding-top:10px;font-weight:700;color:var(--link)}
.pill{align-self:flex-start;font-size:13px;font-weight:700;padding:2px 10px;border-radius:99px;background:var(--hl);color:#141b3d}
.pill.soon{background:var(--wash);color:var(--muted)}
.exam.dim{border-style:dashed;border-color:var(--line)}

/* topic lists: ruled index, not cards */
.tgroup{margin-bottom:26px}
.tgroup h3{font-size:19px;margin:0 0 6px}
.tlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:0 28px;border-top:2px solid var(--ink)}
.tlist a{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:12px 2px;border-bottom:1px solid var(--line);color:var(--ink);font-weight:700;text-decoration:none}
.tlist a:hover{text-decoration:underline;text-decoration-color:var(--hl-2);text-decoration-thickness:4px;text-underline-offset:4px}
.tlist a span{font-weight:400;color:var(--muted);font-size:14px;white-space:nowrap}

/* how it works: a real sequence, so it is numbered */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:26px;counter-reset:s}
.steps div{color:var(--muted)}
.steps b{display:block;color:var(--ink);font-family:var(--head);font-size:20px;margin-bottom:4px}
.steps div::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:40px;height:40px;border-radius:50%;border:2px solid var(--ink);color:var(--ink);font-family:var(--head);font-weight:800;margin-bottom:12px}

/* faq */
details.faq{border-top:1px solid var(--line);padding:16px 0}
details.faq:last-child{border-bottom:1px solid var(--line)}
details.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px}
details.faq summary::after{content:"+";font-family:var(--head);font-size:22px;line-height:1}
details.faq[open] summary::after{content:"\2212"}
details.faq summary::-webkit-details-marker{display:none}
details.faq p{margin:8px 0 0;color:var(--muted)}

/* study list */
.sq{padding:20px 0;border-top:1px solid var(--line)}
.sq .qt{font-weight:700;margin:0 0 8px}
.sq ol{margin:0 0 10px;padding-left:24px;list-style:upper-alpha}
.sq details summary{cursor:pointer;color:var(--link);font-weight:700;font-size:15px}
.sq details div{margin-top:10px;padding:12px 14px;border-left:4px solid var(--hl-2);background:var(--wash);font-size:16px}
.sq details div b{color:var(--ok)}
.cite{font-size:14px;color:var(--muted);margin-top:6px}
.cite a{color:var(--muted)}
.callout{padding:12px 14px;border-left:4px solid var(--hl-2);background:var(--wash);font-size:15px;color:var(--muted);margin-bottom:8px}
.study-h{font-size:21px;margin:30px 0 4px}

/* quiz component */
.quiz{scroll-margin-top:80px}
.setup h2{font-size:26px;margin-bottom:6px}
.setup .sub{color:var(--muted);font-size:15px;margin:0 0 20px}
.field{margin-bottom:20px}
.field .l{display:block;font-size:15px;font-weight:700;margin-bottom:8px}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg button{flex:1 1 0;min-width:86px;padding:11px 10px;border-radius:10px;border:2px solid var(--line);background:transparent;color:var(--ink);font:inherit;font-size:15px;font-weight:700;cursor:pointer;line-height:1.25}
.seg button small{display:block;font-weight:400;color:var(--muted);font-size:13px;margin-top:2px}
.seg button:hover{border-color:var(--muted)}
.seg button[aria-pressed="true"]{border-color:var(--ink);background:var(--hl);color:#141b3d}
.seg button[aria-pressed="true"] small{color:#3d4565}
.select{width:100%;padding:12px;border-radius:10px;border:2px solid var(--line);background:var(--paper);color:var(--ink);font:inherit;font-size:16px}
.qbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:4px 0 10px;font-size:15px;color:var(--muted)}
.qbar .quit{background:none;border:0;color:var(--muted);font:inherit;font-size:15px;cursor:pointer;text-decoration:underline;padding:0}
.progress{height:8px;background:var(--wash);border-radius:99px;overflow:hidden;margin-bottom:16px;border:1px solid var(--line)}
.progress i{display:block;height:100%;background:var(--hl-2);width:0;transition:width .2s}
.qsec{font-size:14px;color:var(--muted);margin-bottom:8px}
.qtext{font-size:20px;font-weight:700;line-height:1.4;margin:0 0 18px}
.choices{display:grid;gap:8px}
.choice{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:12px 14px;border-radius:12px;border:2px solid transparent;background:transparent;color:var(--ink);font:inherit;font-size:17px;cursor:pointer;line-height:1.4}
.choice:hover:not(:disabled){background:var(--wash)}
/* the answer-sheet bubble */
.choice .k{flex:none;width:34px;height:34px;border-radius:50%;border:2px solid var(--muted);display:grid;place-items:center;font-weight:700;font-size:14px;color:var(--muted);transition:background .12s,border-color .12s,color .12s}
.choice.picked .k{background:var(--pencil);border-color:var(--pencil);color:var(--paper)}
.choice.right{background:var(--ok-bg)}
.choice.right .k{background:var(--ok);border-color:var(--ok);color:#fff}
.choice.wrong{background:var(--bad-bg)}
.choice.wrong .k{background:var(--bad);border-color:var(--bad);color:#fff}
.choice:disabled{cursor:default;color:var(--ink)}
.explain{margin-top:14px;padding:14px 16px;border-left:4px solid var(--hl-2);background:var(--wash);font-size:16px}
.explain b{display:block;margin-bottom:4px}
.explain.ok b{color:var(--ok)} .explain.no b{color:var(--bad)}
.explain .source{display:block;margin-top:8px;font-size:14px;color:var(--muted)}
.explain .report{display:block;margin-top:8px;font-size:13px;color:var(--muted)}
.qnav{display:flex;gap:10px;justify-content:space-between;margin-top:18px}
.hint{font-size:13px;color:var(--muted);text-align:center;margin-top:12px}
@media (max-width:600px){.hint{display:none}}
.score{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.ring{--p:0;width:124px;height:124px;border-radius:50%;background:conic-gradient(var(--c) calc(var(--p)*1%),var(--wash) 0);display:grid;place-items:center;flex:none;border:2px solid var(--ink)}
.ring div{width:96px;height:96px;border-radius:50%;background:var(--paper);display:grid;place-items:center;font-family:var(--head);font-size:30px;font-weight:800;border:2px solid var(--ink)}
.score h2{font-size:28px;margin-bottom:6px}
.score p{margin:0;color:var(--muted)}
table.brk{width:100%;border-collapse:collapse;margin-top:8px;font-size:15px}
table.brk th,table.brk td{text-align:left;padding:10px 4px;border-bottom:1px solid var(--line)}
table.brk th{font-size:14px;color:var(--muted);font-weight:700;border-bottom:2px solid var(--ink)}
table.brk .n{text-align:right;white-space:nowrap}
.bar{height:6px;border-radius:99px;background:var(--wash);overflow:hidden;margin-top:5px}
.bar i{display:block;height:100%}
.ritem{padding:14px 0;border-top:1px solid var(--line);font-size:16px}
.ritem .rq{font-weight:700;margin-bottom:6px}
.ritem .ra{color:var(--bad)} .ritem .rc{color:var(--ok)}
.ritem .re{color:var(--muted);margin-top:4px}
.gap{margin-top:16px}

/* footer */
footer.site{background:var(--navy);color:var(--on-navy-muted);margin-top:72px;padding:40px 0 48px;font-size:15px}
footer.site a{color:var(--on-navy-muted)}
.fcols{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:22px;margin-bottom:26px}
.fcols h4{margin:0 0 10px;font-family:var(--head);font-size:17px;color:#fff}
.fcols a{display:block;text-decoration:none;padding:3px 0}
.fcols a:hover{color:#fff;text-decoration:underline}
footer.site .fine{font-size:14px;margin:0 0 8px;max-width:75ch}
footer.site .fine a{color:#fff}