:root{--ink:#172332;--muted:#526172;--paper:#edf0f4;--card:#ffffff;--line:#cbd3dd;--green:#1556b8;--lime:#dce9fb;--gold:#1556b8;--danger:#aa2636;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}a{color:inherit}:focus-visible{outline:3px solid #d28a11;outline-offset:4px}.topbar{max-width:1160px;margin:auto;padding:26px 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{text-decoration:none;display:flex;align-items:center;gap:12px;font-size:19px;font-weight:700}.mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--green);border-radius:50%;font-family:Arial,Helvetica,sans-serif;font-size:18px}.mark span{margin-left:-2px;margin-top:8px;font-style:italic}.tag,.small{font-size:13px;color:var(--muted);line-height:1.7}main{max-width:1096px;margin:auto;padding:0 32px}.intro{padding:56px 0 38px}.eyebrow{font-size:11px;letter-spacing:.18em;font-weight:750;color:var(--green)}h1{font-family:Arial,Helvetica,sans-serif;font-size:clamp(40px,6vw,65px);line-height:1.08;letter-spacing:-.035em;margin:16px 0 22px;font-weight:400}h1 em{color:var(--green)}.intro>p:last-child{color:var(--muted);line-height:1.8;font-size:16px}h2,h3{font-weight:650}h2{font-size:21px;margin:0}h3{font-size:19px}.section-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:20px 0}.section-heading>span{font-size:12px;color:var(--muted)}.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic{background:var(--card);border:1px solid var(--line);border-radius:12px;text-align:left;padding:25px;display:flex;flex-direction:column;min-height:220px;transition:transform .15s,border-color .15s}.topic:hover{transform:translateY(-3px);border-color:var(--green)}.topic[aria-pressed=true]{border:2px solid var(--green);padding:24px;background:#e9f0fc}.topic .number{font:700 20px Arial,Helvetica,sans-serif;color:var(--gold)}.topic h3{margin:18px 0 8px}.topic p{font-size:14px;line-height:1.6;color:var(--muted);margin:0 0 20px}.topic .go{margin-top:auto;font-size:13px;font-weight:650}.panel{background:var(--card);padding:32px;border:1px solid var(--line);border-radius:14px;margin:24px 0}.panel>p{line-height:1.7}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}label{font-size:14px;font-weight:600;display:block}select,input[type=text]{display:block;background:white;color:var(--ink);width:100%;padding:12px;border:1px solid #a8b4a7;border-radius:7px;margin-top:8px;min-height:48px}input[type=checkbox]{width:18px;height:18px;vertical-align:middle;margin-right:7px}.check-label{margin:18px 0;font-weight:400}.actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:24px}.primary,.secondary,.text-button{border:0;border-radius:7px;padding:12px 18px;font-weight:650;min-height:44px}.primary{background:var(--green);color:white}.primary:hover{background:#103e83}.secondary{background:#e3eaf3;color:var(--green)}.text-button{background:transparent;color:var(--green);padding:8px 4px;text-decoration:underline;text-underline-offset:4px}.danger{color:var(--danger)}.session{max-width:820px;margin:20px auto 36px}.session-top{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px;margin-bottom:20px}.session h2{font-family:Arial,Helvetica,sans-serif;font-size:30px;font-weight:400;margin:20px 0}.cue,.notice{padding:15px 18px;background:#e9f0fc;border-left:3px solid #1556b8;border-radius:4px;line-height:1.6}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px}.answer-grid label span{font-size:12px;color:var(--muted);font-weight:400}.answer-grid input[readonly]{background:#f0f3f7}.feedback{margin-top:24px;padding:20px;background:#eaf1fb;border-radius:9px;line-height:1.7}.feedback h3{margin:0 0 8px}.feedback ul{padding-left:22px}.feedback .miss{color:var(--danger)}.study-list{display:grid;grid-template-columns:1fr 1fr;list-style:none;padding:0;gap:10px}.study-list li{padding:14px;background:#f0f3f7;border-radius:6px;line-height:1.6}.study-list small{display:block;color:var(--muted)}.progress-section{padding:24px 0 36px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.stat{padding:20px;border-top:1px solid var(--line)}.stat strong{font:700 32px Arial,Helvetica,sans-serif;display:block}.stat span{font-size:12px;color:var(--muted)}details{margin-top:20px;font-size:14px;line-height:1.7}summary{cursor:pointer}.file-label{margin:18px 0}footer{max-width:1096px;margin:auto;padding:25px 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;font-size:12px;color:var(--muted)}.skip{position:absolute;top:-80px;left:20px;background:white;padding:15px;z-index:10}.skip:focus{top:10px}[hidden]{display:none!important}.score{font:700 48px Arial,Helvetica,sans-serif;margin:20px 0}.pill{display:inline-block;padding:5px 10px;border-radius:20px;background:var(--lime);font-size:12px}.error{color:var(--danger)}@media(max-width:700px){.topbar{padding:18px 20px}.tag{display:none}main{padding:0 20px}.intro{padding-top:34px}.topics{grid-template-columns:1fr}.topic{min-height:0;padding:20px}.topic[aria-pressed=true]{padding:19px}.topic .number{font-size:26px}.topic h3{margin:12px 0 6px}.topic p{margin-bottom:14px}.form-grid,.answer-grid,.study-list{grid-template-columns:1fr}.panel{padding:22px}.stats{grid-template-columns:1fr 1fr}.stat{padding:15px 5px}.section-heading>span{display:none}footer{padding:22px 20px;flex-direction:column}.session h2{font-size:27px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Version 1.1: compact, sans-serif quiz interface. */
.topbar{max-width:none;background:#172332;color:#fff;padding:20px max(24px,calc((100vw - 1032px)/2));border:0;min-height:78px}
.topbar .tag{color:#c1cedd}.brand{font-size:20px;letter-spacing:.01em}.mark{border:0;border-radius:5px;background:#2874db;font:700 17px Arial,Helvetica,sans-serif}.mark span{font-style:normal;margin-top:0;margin-left:0}
.intro{padding:32px 0 24px;border-bottom:1px solid var(--line);margin-bottom:26px}h1{font-size:clamp(30px,4.5vw,44px);line-height:1.15;letter-spacing:-.025em;font-weight:750;margin:12px 0 16px}.intro>p:last-child{font-size:16px;line-height:1.6;margin-bottom:0}.eyebrow{letter-spacing:.1em}.topic{border-radius:6px;min-height:205px;border-top:4px solid #1556b8}.topic[aria-pressed=true]{border-width:2px;border-top-width:4px;padding:24px;background:#eaf1fb}.topic .number{display:inline-flex;background:#e4edfa;border-radius:4px;width:38px;height:34px;align-items:center;justify-content:center}.topic h3{margin-top:16px}.topic:hover{transform:none;box-shadow:0 3px 10px #17233212}.panel{border-radius:6px}.session h2{font-weight:700;font-size:27px}.primary,.secondary{border-radius:4px}.study-list li{border-radius:4px}.feedback{border-radius:5px}.stat{border-top:3px solid var(--line)}.stat strong{color:#172332}.score{color:#1556b8}.pill{border-radius:4px}
@media(max-width:700px){.topbar{padding:18px 20px}.topic{min-height:0}.intro{padding-top:26px}.topic[aria-pressed=true]{padding:19px}.actions>.primary,.actions>.secondary{min-height:46px}.session h2{font-size:24px}}