:root{--navy:#112b4a;--ink:#18334f;--muted:#53657b;--teal:#067276;--teal-pale:#e8f5f3;--paper:#f4f7fa;--line:#dce4ec;--white:#fff;--gold:#bf8423;--radius:16px;--shadow:0 8px 32px #20365008}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:Inter,"Segoe UI","Microsoft YaHei",system-ui,sans-serif;font-size:15px;line-height:1.75}a{color:inherit;text-decoration:none}a:hover{color:var(--teal)}button,input,select{font:inherit}button,a,input,summary{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #28aca9;outline-offset:3px}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(29px,3.8vw,47px);letter-spacing:-1.3px;line-height:1.25;margin-bottom:20px}h2{font-size:23px;line-height:1.4;letter-spacing:-.4px;margin-bottom:17px}h3{font-size:17px;margin-bottom:10px}p{margin-bottom:16px}small{font-size:12px}.eyebrow{display:block;font-size:11px;letter-spacing:2.5px;font-weight:750;color:var(--teal);margin-bottom:17px}.muted{color:var(--muted)}.small{font-size:13px}.mono{font-family:"Cascadia 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@media(min-width:1500px){.frame{gap:52px}}
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@media(max-width:900px){.frame{display:block;padding:24px}.sidebar{display:none}.head-nav{gap:22px}.site-head{padding:0 24px;gap:30px}.site-footer{padding:20px 24px}.detail-grid{grid-template-columns:minmax(0,1fr) 240px}.practice-layout{grid-template-columns:minmax(0,1fr) 190px}.mobile-context{display:block}.hero h1{max-width:600px}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.article-exam-nav{display:flex;flex-wrap:wrap;gap:10px}.article-teaser{display:flex;align-items:center;justify-content:space-between;gap:25px}.article-teaser .eyebrow{margin-bottom:10px}.article-teaser h2{margin-bottom:8px}.article-teaser p{margin-bottom:0;max-width:580px}.article-teaser .actions{flex-shrink:0}.filter-row{display:flex;align-items:flex-start;gap:20px;margin-top:19px}.filter-label{font-size:12px;color:var(--muted);flex:0 0 62px;padding-top:7px}.filter-options{display:flex;flex-wrap:wrap;gap:8px}.filter-chip{border:1px solid var(--line);background:#fff;color:var(--muted);font-size:12px;border-radius:7px;padding:7px 13px;min-height:37px}.filter-chip:hover{border-color:var(--teal);color:var(--teal)}.filter-chip[aria-pressed=true]{background:var(--teal-pale);border-color:#7cbeb7;color:var(--teal);font-weight:700}.filter-summary{margin:24px 0 16px;font-size:12px;color:var(--muted)}.article-empty{text-align:center;background:#f6f9fb;border:1px dashed #c5d3df;border-radius:12px;padding:30px 24px}.article-empty .eyebrow{margin-bottom:12px}.article-empty h3{font-size:19px}.article-empty p{font-size:13px;color:var(--muted);max-width:540px;margin:0 auto}.article-direction-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.article-direction-grid .eyebrow{font-size:10px;letter-spacing:1.5px;margin-bottom:15px}.article-skeleton{border:1px dashed #c4d0db;border-radius:11px;padding:7px 20px;background:#f8fafc}.article-skeleton>div{padding:19px 0;border-bottom:1px dashed #d6e0e9;display:flex;justify-content:space-between;gap:20px;align-items:center}.article-skeleton>div:last-child{border-bottom:0}.article-skeleton span{font-size:14px;font-weight:650}.article-skeleton em{font-style:normal;font-size:11px;color:#8593a2;text-align:right}.frame>main{min-width:0}
@media(max-width:1150px){.article-teaser{display:block}.article-teaser .actions{margin-top:18px}.article-direction-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){.article-direction-grid{grid-template-columns:1fr}.article-exam-nav .btn{flex:1;min-width:90px;font-size:12px;padding:10px}.filter-row{display:block;margin-top:20px}.filter-label{display:block;padding:0;margin-bottom:9px}.filter-chip{min-height:40px;padding:8px 12px}.article-empty{padding:25px 18px}.article-skeleton{padding:4px 16px}.article-skeleton>div{display:block;padding:16px 0}.article-skeleton em{display:block;text-align:left;margin-top:7px}.article-teaser .btn{width:100%}.article-teaser .actions{display:block}.article-teaser .btn+.btn{margin-top:10px}}

/* Readable body and controls at the original 375px acceptance width. */
@media(max-width:760px){body{font-size:16px}main p,main li,main label,main input,main select,main textarea,main button,main .btn{font-size:16px}.paper-study-hero .paper-study-lead,.paper-study-hero .paper-study-scope{font-size:16px}}