:root{--navy:#142e53;--blue:#2367e8;--ink:#1d304d;--muted:#596b81;--line:#dde5ef;--bg:#f5f8fc}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Tahoma,Arial,sans-serif;font-size:16px;line-height:1.9}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
button,a,select,input,summary{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #f0ab34;outline-offset:4px}
header{background:#fff;border-bottom:1px solid var(--line)}
.header-inner{max-width:1240px;margin:auto;padding:24px 32px;display:flex;align-items:center;gap:64px}
.brand{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:bold;line-height:1.35}
.brand-mark{display:grid;place-items:center;background:var(--navy);color:#fff;width:45px;height:48px;border-radius:12px;font-size:30px}
.brand small{display:block;font:10px Arial;letter-spacing:2px;margin-top:6px}
.blue{color:var(--blue)}
nav{display:flex;gap:30px;font-size:14px}
nav a{padding:12px 0}
.active{color:var(--blue);font-weight:bold}
.header-note{margin-right:auto;font-size:13px;color:var(--muted)}
main{max-width:1240px;margin:auto;padding:0 32px}
.intro{display:grid;grid-template-columns:1.3fr 1fr;gap:80px;padding:54px 0 50px;align-items:center}
.eyebrow{font-size:13px;color:var(--blue);font-weight:bold;margin:0 0 12px}
h1{font-size:46px;line-height:1.7;letter-spacing:-1.6px;margin:0;font-weight:800}
h1 span{color:var(--blue)}
.intro-copy{color:var(--muted);margin:12px 0 20px}
.intro-link{font-size:14px;font-weight:bold;display:flex;align-items:center;gap:30px;width:fit-content}
.intro-link span{background:#e4ecfc;width:32px;height:32px;border-radius:50%;text-align:center;color:var(--blue)}
.study-note{background:var(--navy);color:#fff;border-radius:20px;padding:26px 32px;box-shadow:9px 9px 0 #e0e8f5}
.note-label{font-size:13px;color:#b8d1fb;display:block;margin-bottom:14px}
.step{display:flex;gap:20px;align-items:center;padding:16px 0;border-bottom:1px solid #ffffff1f}
.step:last-child{border:0;padding-bottom:4px}
.step b{font:28px Tahoma;color:#83aeff}
.step strong{font-size:16px;display:block}
.step span{font-size:13px;color:#c0cee0}
.official,.archive{background:white;border:1px solid var(--line);border-radius:20px;padding:30px}
.official{margin-bottom:28px}
.section-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}
h2{font-size:24px;margin:0;line-height:1.8}
.section-head .eyebrow{margin-bottom:4px}
.sample-badge{font-size:12px;background:#edf3fc;padding:5px 12px;border-radius:20px;color:#435c7e;white-space:nowrap}
.verified-badge{font-size:12px;background:#eaf7f1;padding:5px 12px;border-radius:20px;color:#28634f;white-space:nowrap}
.official-intro{max-width:780px;color:var(--muted);font-size:14px;margin:-8px 0 20px}
.source-filters{display:flex;gap:8px;margin-bottom:18px}
.source-filter{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:22px;padding:7px 16px}
.source-filter.active{background:var(--navy);border-color:var(--navy);color:white}
.official-tools{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px;margin-bottom:12px}
.official-tools>label{font-size:12px;color:var(--muted)}
.official-tools select{margin-top:0}
.official-search{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;background:#f7f9fc;padding:0 14px;min-height:46px}
.official-search>span:first-child{font-size:26px;line-height:1;color:var(--blue)}
.official-search input{padding:8px 10px}
.official-count{font-size:13px;font-weight:bold;margin:8px 0 14px}
.official-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.source-card{border:1px solid var(--line);border-radius:12px;padding:18px;display:flex;flex-direction:column;min-height:220px}
.source-card-top{display:flex;align-items:center;gap:10px}
.source-logo{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;background:#eaf1ff;color:var(--blue);font-weight:bold;font-size:20px}
.source-card.maze .source-logo{background:#f1eaff;color:#7042b7}
.source-card-top strong,.source-card-top span{display:block}
.source-card-top span{font-size:12px;color:var(--muted)}
.source-card h3{font-size:16px;line-height:1.7;margin:16px 0 4px}
.source-card>p{font-size:13px;color:var(--muted);margin:0}
.source-card-foot{display:flex;align-items:end;justify-content:space-between;gap:8px;margin-top:auto;padding-top:20px}
.source-card-foot>span{font-size:11px;border-radius:4px;padding:2px 7px}
.public-access{background:#eaf7f1;color:#28634f}
.login-access{background:#fff2dd;color:#865313}
.source-card-foot a{font-size:13px;color:var(--blue);font-weight:bold}
.source-note{background:#f5f8fc;border-right:3px solid #8ba3c2;color:var(--muted);font-size:12px;padding:11px 14px;margin:20px 0 0}
.search{display:flex;align-items:center;background:#f7f9fc;border:1px solid var(--line);border-radius:10px;padding:0 16px;gap:12px}
.search span{font-size:32px;line-height:1;color:var(--blue)}
input{min-width:0;width:100%;border:0;background:transparent;padding:15px 0;color:var(--ink);font-size:14px}
input::placeholder{color:#69798c}
.filter-row{display:flex;gap:16px;margin-top:18px;align-items:end}
.filter-row label{flex:1;font-size:13px;color:var(--muted)}
select{display:block;width:100%;margin-top:6px;padding:10px 12px;background:#fff;border:1px solid var(--line);border-radius:8px;color:var(--ink);font-size:14px;min-height:46px}
.reset{background:white;border:1px solid var(--line);border-radius:8px;padding:10px 16px;font-size:14px;min-height:46px;color:var(--muted)}
.results-heading{display:flex;justify-content:space-between;gap:16px;align-items:center;margin:18px 0 12px;font-size:13px}
.results-heading p{margin:0;font-weight:bold}
.results-heading span{color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 20px #142e530b}
.card-main{padding:20px}
.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;gap:8px}
.subject-icon{width:40px;height:40px;border-radius:10px;background:var(--tint);color:var(--accent);display:grid;place-items:center;font-size:20px;font-family:Arial;font-weight:bold}
.card-kind{font-size:12px;color:var(--muted)}
.card h3{font-size:17px;margin:0 0 7px}
.card .topic{font-size:13px;color:var(--muted);margin:0;min-height:50px}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}
.tags span{font-size:12px;background:#f3f6fa;border-radius:4px;padding:2px 8px}
.card-meta{display:flex;gap:14px;color:var(--muted);font-size:12px}
.card-action{display:flex;justify-content:space-between;align-items:center;background:#fafcff;padding:12px 20px;border-top:1px solid var(--line)}
.card-action span{font-size:12px;color:#397062}
.card-action button{border:0;color:var(--blue);background:transparent;padding:6px 0;font-weight:bold;font-size:14px}
.content-notice{background:#f5f8fc;color:var(--muted);font-size:13px;padding:13px 16px;border-radius:8px;margin:24px 0 0}
.guide{display:grid;grid-template-columns:1fr 1.1fr;gap:70px;padding:54px 0}
.guide p:not(.eyebrow){color:var(--muted);font-size:14px;max-width:430px}
.guide-details{border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line);padding:15px 0}
summary{cursor:pointer;font-size:14px;font-weight:bold}
details p{margin-bottom:0}
footer{border-top:1px solid var(--line);max-width:1176px;margin:auto;padding:24px 0;display:flex;gap:24px;align-items:center;color:var(--muted);font-size:13px}
footer span:last-child{margin-right:auto;font:12px Arial;letter-spacing:1px}
.footer-brand{font-size:18px;color:var(--navy);font-weight:bold}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.skip{position:absolute;top:-100px}
.skip:focus{top:0;background:#fff;padding:16px;z-index:10}
#empty{text-align:center;padding:40px 16px}
.empty-icon{font-size:42px;color:var(--blue)}
#empty p{color:var(--muted)}
.primary{background:var(--blue);color:white;padding:12px 20px;border:0;border-radius:8px}
dialog{width:min(800px,calc(100% - 32px));max-height:88vh;border:1px solid var(--line);border-radius:16px;padding:28px;color:var(--ink);overscroll-behavior:contain}
dialog::backdrop{background:#07192db8;backdrop-filter:blur(4px)}
body:has(dialog[open]){overflow:hidden}
.dialog-header{display:flex;align-items:center;justify-content:space-between}
.close{background:#f0f4fa;border:0;width:42px;height:42px;border-radius:50%;font-size:28px;color:var(--ink)}
#exam-meta{color:var(--muted);font-size:14px}
.dialog-tools{display:flex;gap:12px;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:20px}
.view-buttons{display:flex;gap:4px;background:#edf2f9;border-radius:8px;padding:4px}
.view-buttons button{font-size:13px;padding:8px;border:0;border-radius:5px;background:transparent;color:var(--muted)}
.view-buttons button[aria-pressed=true]{background:white;color:var(--blue);box-shadow:0 1px 5px #142e5314}
.question{padding:14px 0;border-bottom:1px solid var(--line)}
.question h3{font-size:16px;margin:0 0 12px}
.options{display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:14px}
.options span{border:1px solid var(--line);border-radius:8px;padding:8px 12px}
.answer{background:#f0f7f5;border-right:3px solid #43866f;padding:12px 16px;font-size:14px}
.answer strong{color:#28634f}
.noscript{padding:24px;background:#fff3d2;text-align:center}
@media(max-width:900px){.header-note{display:none}
.header-inner{justify-content:space-between;gap:24px}
.intro{gap:32px}
h1{font-size:36px}
.cards,.official-grid{grid-template-columns:repeat(2,1fr)}
.guide{gap:32px}
footer{margin:0 32px}
.filter-row{flex-wrap:wrap}
.filter-row label{min-width:25%}
.filter-row .reset{width:100%}
}
@media(max-width:600px){.header-inner{padding:18px 20px;gap:16px}
.brand{font-size:20px}
.brand-mark{width:36px;height:40px}
.brand small{font-size:8px}
nav{gap:14px;font-size:12px}
nav a:last-child{display:none}
main{padding:0 16px}
.intro{grid-template-columns:1fr;padding:30px 4px;gap:28px}
h1{font-size:34px}
.intro-copy{font-size:14px}
.study-note{padding:20px 24px}
.step{padding:10px 0}
.official,.archive{padding:20px 16px;border-radius:14px}
.official-tools{grid-template-columns:1fr 1fr}
.official-search{grid-column:1/-1}
.section-head{align-items:start;flex-direction:column;gap:10px}
h2{font-size:21px}
.filter-row{gap:12px}
.filter-row label{min-width:40%}
.filter-row label:last-of-type{min-width:100%}
.cards,.official-grid{grid-template-columns:1fr}
.results-heading{align-items:start}
.results-heading span{font-size:12px}
.card .topic{min-height:0}
.guide{grid-template-columns:1fr;gap:16px;padding:32px 4px}
footer{margin:0 20px;flex-wrap:wrap;gap:8px 20px}
footer span:last-child{width:100%;margin:0}
dialog{padding:20px}
.dialog-tools{flex-direction:column}
.view-buttons button{flex:1}
.options{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*{transition:none!important}
}
@media print{body{background:#fff;font-size:12pt}
body>*:not(dialog){display:none!important}
dialog[open]{position:static;display:block;width:100%;max-height:none;overflow:visible;border:0;padding:0;margin:0}
dialog::backdrop{display:none}
.dialog-tools,.close{display:none}
.question{break-inside:avoid}
.options{grid-template-columns:1fr 1fr}
.answer{background:white}
body:has(dialog[open]){overflow:visible}
}