:root{--ink:#152521;--muted:#52645f;--paper:#fbfcf9;--card:#fff;--line:#dce6df;--accent:#168a87;--accent-light:#dff6f3;--dark:#132d3e;font-family:system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.65}a{color:#165951;text-decoration-thickness:1px;text-underline-offset:.19em}a:hover{color:var(--accent)}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.shell{max-width:1140px;margin:auto;padding:0 22px}.skip{position:absolute;top:-80px;left:15px;background:#fff;padding:10px;z-index:5}.skip:focus{top:8px}.masthead{background:var(--dark);color:#fff;border-bottom:3px solid var(--accent)}.top{min-height:82px;display:flex;justify-content:space-between;align-items:center;gap:24px}.wordmark{display:inline-flex;align-items:center;gap:9px;color:white;text-decoration:none;font-weight:800;font-size:1.25rem;white-space:nowrap}.wordmark:hover{color:white}.brand-mark{display:inline-grid;place-items:center;border:1px solid #ffffff55;background:#ffffff18;color:#fff;border-radius:9px;width:34px;height:34px;font-size:.85rem}.top nav{display:flex;flex-wrap:wrap;gap:5px}.top nav a{color:#f1f6f2;padding:7px 10px;text-decoration:none;border-radius:7px;font-size:.86rem}.top nav a:hover,.top nav a.current{background:#ffffff25;color:#fff}.eyebrow{color:var(--accent);font-size:.76rem;text-transform:uppercase;letter-spacing:.15em;font-weight:800;margin-top:36px}.hero{padding:20px 0 30px;max-width:860px}h1{font-weight:830;line-height:1.12;letter-spacing:-.04em;font-size:clamp(2.1rem,4.4vw,3.6rem);margin:8px 0 18px}h2{font-size:1.5rem;letter-spacing:-.025em;line-height:1.25;margin:0 0 15px}.lead{font-size:1.18rem;color:var(--muted);line-height:1.6;max-width:760px}.hero-note{border-left:4px solid var(--accent);background:var(--accent-light);color:#473e32;padding:13px 17px;margin:24px 0 0;max-width:730px;border-radius:0 8px 8px 0;font-size:.94rem}.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}.article-section{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px 30px;margin-bottom:18px}.article-section p{margin:0 0 16px;color:#34443d}.article-section p:last-child{margin-bottom:0}.detail-list{padding-left:20px;margin:0;color:#354840}.detail-list li{margin:9px 0}.layout aside{position:sticky;top:20px;padding:24px;border:1px solid var(--line);border-radius:14px;background:#f1f6f0}.layout aside h2{font-size:1.08rem}.topic-grid{display:grid;gap:10px}.topic-card{display:grid;gap:5px;padding:15px;background:white;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink);transition:border-color .15s}.topic-card:hover{border-color:var(--accent)}.topic-card strong{line-height:1.28}.topic-card span:last-child{font-size:.85rem;color:var(--muted)}.topic-tag{font-size:.67rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--accent)}.faq details{padding:13px 0;border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:750}.faq details p{margin:10px 0 3px}.sources a{overflow-wrap:anywhere}.closing{background:var(--dark);color:white;padding:27px;border-radius:14px;margin:26px 0 55px}.closing p{color:#e5eee7}.closing h2{margin-bottom:8px}footer{border-top:1px solid var(--line);color:var(--muted);font-size:.83rem;padding:20px 0 30px}.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px}.footer-inner p{margin:0}@media(max-width:880px){.layout{grid-template-columns:1fr}.layout aside{position:static}.top{display:block;padding-top:15px;padding-bottom:12px}.top nav{padding-top:12px}.shell{padding-left:16px;padding-right:16px}.article-section{padding:21px}.hero{padding-bottom:18px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* R9: guided information architecture, compact index, accessible navigation */
.top nav{gap:3px}.top nav a{white-space:nowrap}.guide-directory{background:#fff;border:1px solid var(--line);border-radius:14px;margin:18px 0;padding:25px}.guide-directory>p{color:var(--muted);margin:0 0 22px}.directory-group{margin:0 0 24px}.directory-group:last-child{margin-bottom:0}.directory-group h3{font-size:.82rem;color:var(--accent);text-transform:uppercase;letter-spacing:.08em;margin:0 0 12px}.directory-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.directory-card{display:grid;gap:4px;padding:13px;border:1px solid var(--line);border-radius:9px;background:#fbfdfb;text-decoration:none;color:var(--ink)}.directory-card:hover,.directory-card:focus-visible{border-color:var(--accent)}.directory-card span{color:var(--muted);font-size:.87rem;line-height:1.45}.directory-card strong{font-size:.98rem;line-height:1.3}.directory-link{display:block;font-weight:700;margin-top:17px;font-size:.9rem}.layout aside{max-height:calc(100vh - 40px);overflow-y:auto}.masthead nav{scrollbar-width:thin}@media(max-width:880px){.layout aside{max-height:none;overflow:visible}.top{display:flex;align-items:flex-start;flex-direction:column;gap:6px}.top nav{flex-wrap:nowrap;overflow-x:auto;width:100%;padding:6px 0 8px}.top nav a{font-size:.83rem}}@media(max-width:600px){.directory-list{grid-template-columns:1fr}.guide-directory{padding:18px}.hero h1{font-size:clamp(1.95rem,8vw,3rem)}.article-section{padding:19px}}