:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#143653;background:#fff;line-height:1.6;font-size:17px;--ink:#143653;--muted:#526879;--accent:#147D82;--tint:#edf7f6;--line:#d9e4e8;--purple:#7356A6;--petrol:#147D82}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button,.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:1px solid var(--accent);border-radius:8px;padding:11px 18px;background:var(--accent);color:#fff;font-weight:650;text-decoration:none;cursor:pointer;line-height:1.4;min-height:46px}button:hover,.button:hover{filter:brightness(.94)}button:disabled{cursor:default;opacity:.65}.secondary{color:var(--ink);background:#fff;border-color:#94aab7}.text-button{background:none;color:var(--ink);border-color:transparent;text-decoration:underline;padding-inline:5px}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #ab346d;outline-offset:4px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,4.8vw,52px);line-height:1.14;letter-spacing:-.035em;margin-bottom:20px}h2{font-size:26px;line-height:1.3;letter-spacing:-.02em}h3{font-size:22px;line-height:1.35}p{margin-bottom:16px}.small,small{font-size:14px;color:var(--muted)}.eyebrow{font-size:13px;font-weight:750;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}.lead{font-size:20px;line-height:1.65;max-width:660px}.site-header{background:#f2f9fc}.header-inner{max-width:1200px;padding:20px 28px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{width:218px;flex-shrink:0;display:block}.brand img{width:100%;height:auto;display:block}nav{display:flex;gap:24px;flex-wrap:wrap;font-size:14px;font-weight:600}nav a{text-decoration:none}nav [aria-current]{border-bottom:2px solid #147D82}.brand-bar{height:4px;background:linear-gradient(to right,#e95b99 0 33.33%,#60b9e3 33.33% 66.66%,#85ab68 66.66%)}main{max-width:1200px;margin:auto;padding:44px 28px 80px;min-height:78vh}.hero{display:grid;grid-template-columns:1.7fr 1fr;align-items:center;gap:40px;margin:5px 0 38px}.hero img{width:100%;height:auto;max-width:260px;justify-self:center}.hero .lead{margin-bottom:20px}.pills{display:flex;gap:8px;flex-wrap:wrap}.pill{font-size:13px;border:1px solid var(--line);border-radius:30px;padding:5px 12px;background:#fff}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:30px 0 42px}.subject-card{padding:22px 24px;border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:10px;text-decoration:none;display:flex;flex-direction:column;background:var(--tint)}.subject-card h2{margin-bottom:8px;font-size:24px}.subject-card p{font-size:15px;margin-bottom:12px}.subject-card strong{font-size:14px;margin-top:auto}.math{--accent:#85ab68;--tint:#f5f8f1}.reading{--accent:#7356A6;--tint:#f5f1fa}.language{--accent:#147D82;--tint:#edf7f6}.subject-card[aria-current]{outline:2px solid var(--accent);outline-offset:3px}.section-heading{display:flex;align-items:baseline;gap:20px;justify-content:space-between;margin:40px 0 22px}.section-heading h2{margin:0}.section-heading p{margin:0}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.topic-card{border:1px solid var(--line);border-radius:12px;padding:24px;display:flex;flex-direction:column;align-items:flex-start}.topic-card .eyebrow{font-size:11px;margin-bottom:12px}.topic-card p{font-size:15px}.topic-card button{margin-top:auto}.topic-meta{margin:4px 0 18px;font-size:13px;color:var(--muted)}.resume{border:1px solid #92b9b2;background:#f1f8f5;border-radius:12px;padding:20px 24px;display:flex;gap:20px;align-items:center;justify-content:space-between;margin-bottom:28px}.resume h2{font-size:21px;margin-bottom:5px}.resume p{margin:0}.notice{background:#f5f8fa;border-left:3px solid #60b9e3;padding:16px 20px;font-size:14px;margin-top:32px}.notice p:last-child{margin-bottom:0}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:20px}.round-top{display:flex;gap:20px;align-items:center;justify-content:space-between;margin-bottom:24px}.round-title{font-size:32px;letter-spacing:-.025em;margin-bottom:12px}.progress-label{font-size:14px;color:var(--muted);display:flex;justify-content:space-between;gap:15px}progress{display:block;width:100%;height:9px;border:0;border-radius:20px;overflow:hidden;background:#e9eef2;accent-color:var(--accent);margin:10px 0 28px}progress::-webkit-progress-bar{background:#e9eef2}progress::-webkit-progress-value{background:var(--accent)}.exercise-layout{max-width:760px;margin:0 auto}.exercise-layout.with-passage{max-width:none;display:grid;grid-template-columns:1.05fr 1fr;gap:28px;align-items:start}.passage{border:1px solid var(--line);border-radius:12px;background:#fbfafc;padding:28px}.passage h2{font-size:25px}.passage p{line-height:1.9}.passage p:last-child{margin:0}.paragraph-number{font-size:12px;color:#6c627c;margin-right:10px}.question-card{padding:28px;border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:12px;min-width:0}.question-card h2{font-size:23px;line-height:1.5;letter-spacing:0}.question-card fieldset{padding:0;margin:0;border:0;min-width:0}.options{display:grid;gap:12px;margin:22px 0}.option{display:flex;gap:12px;align-items:flex-start;padding:14px;border:1px solid #aabdca;border-radius:8px;cursor:pointer;font-size:16px}.option:has(input:checked){border-color:var(--accent);background:var(--tint);box-shadow:inset 3px 0 var(--accent)}.option input{width:19px;height:19px;flex-shrink:0;margin-top:4px;accent-color:var(--accent)}.option.correct-option{border-color:#4f7d43;background:#f1f7ee}.answer-input{display:block;width:100%;border:1px solid #8198a8;border-radius:7px;padding:12px;margin:8px 0;color:var(--ink);background:white;min-width:0}.answer-input:disabled{color:var(--ink);opacity:1;background:#f3f6f8}.hint,.feedback{padding:18px;border-radius:8px;margin-top:20px}.hint{background:#fff9e8;border-left:3px solid #c5a743}.feedback{background:#eef6ec;border-left:4px solid #567e45}.feedback.incorrect{background:#fdf0f6;border-color:#b64479}.hint p,.feedback p{margin:8px 0 0}.error{background:#fff0f4;color:#8b214d;border-left:4px solid #b13d6f;padding:14px}.summary{max-width:820px;margin:auto}.summary h1{margin-top:18px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:30px 0}.metric{padding:20px;border:1px solid var(--line);border-radius:10px;background:var(--tint)}.metric strong{display:block;font-size:36px;line-height:1.3}.metric span{font-size:14px}.review{margin-top:32px}.review details{padding:18px 0;border-top:1px solid var(--line)}summary{cursor:pointer;font-weight:650;line-height:1.7}.review details p:first-of-type{margin-top:15px}.review details .passage{margin:16px 0}.review details .passage p:first-of-type{margin-top:0}.review-label{display:block;font-size:13px;font-weight:500;color:var(--muted)}footer{max-width:1144px;margin:0 auto;padding:22px 0;display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.skip{position:absolute;top:-100px;left:16px;background:white;padding:10px;z-index:10}.skip:focus{top:10px}dialog{max-width:520px;width:calc(100% - 32px);padding:28px;border:1px solid var(--line);border-radius:12px;color:var(--ink)}dialog::backdrop{background:#14365377}
@media(max-width:940px){.header-inner{flex-wrap:wrap;gap:18px}.header-inner nav{gap:18px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{grid-template-columns:1.8fr 1fr;gap:15px}.exercise-layout.with-passage{grid-template-columns:1fr}.passage{padding:24px}}
@media(max-width:620px){main{padding:30px 18px 50px}.header-inner{padding:16px 18px}.brand{width:190px}nav{gap:13px!important;font-size:13px}.hero{grid-template-columns:1fr;margin-bottom:24px}.hero img{display:none}.lead{font-size:18px}.subject-grid,.topic-grid{grid-template-columns:1fr}.subject-grid{gap:12px;margin-bottom:30px}.subject-card{padding:18px 20px}.subject-card p{margin-bottom:8px}.subject-card h2{font-size:22px}.section-heading{display:block}.section-heading p{margin-top:8px}.resume{flex-direction:column;align-items:flex-start}.question-card,.passage{padding:21px}.round-top{align-items:flex-start}.round-title{font-size:28px}.question-card h2{font-size:21px}.actions>button,.actions>.button{flex-grow:1}.metrics{gap:8px}.metric{padding:14px 10px}.metric strong{font-size:30px}.metric span{font-size:12px}footer{padding:20px 18px;flex-direction:column}.topic-card{padding:22px}.option{padding:12px}.progress-label{font-size:13px}}

h1:focus,main:focus{outline:none}