:root{--bg:#fff;--gray:#f1f4f9;--line:#dde3ec;--navy:#0b2545;--ink:#1d3557;--muted:#4a5b75;--blue:#2f80ed;--blue-d:#1c62c4;--green:#27ae60;--green-d:#1e7e46;--amber:#9a5b00;--radius:12px;--sp1:.5rem;--sp2:1rem;--sp3:1.5rem;--sp4:2.5rem;--sp5:4rem;--max:1120px;--read:46rem}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--navy);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-d);text-underline-offset:2px}
a:hover{color:var(--navy)}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:.6rem 1rem;z-index:10}
.skip:focus{left:1rem;top:1rem}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.read{max-width:var(--read)}
h1,h2,h3{line-height:1.2;letter-spacing:-.015em;color:var(--navy)}
h1{font-size:clamp(1.9rem,4vw,2.75rem);margin:.2em 0 .4em;font-weight:800}
h2{font-size:clamp(1.4rem,2.6vw,1.8rem);margin:2.2em 0 .5em;font-weight:750}
h3{font-size:1.15rem;margin:1.6em 0 .4em;font-weight:700}
p,ul,ol{margin:0 0 1em}
li{margin:.25em 0}
code,kbd{font:.88em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--gray);border:1px solid var(--line);border-radius:5px;padding:.08em .35em}
/* top disclosure + header */
.disc{background:var(--navy);color:#dfe8f6;font-size:.84rem;line-height:1.45}
.disc .wrap{padding-top:.45rem;padding-bottom:.45rem}
.disc a{color:#fff}
header.site{border-bottom:1px solid var(--line);background:#fff}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-top:.7rem;padding-bottom:.7rem}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--navy);font-weight:800;font-size:1.08rem;letter-spacing:-.01em}
.brand img{width:34px;height:34px}
.brand span b{color:var(--blue-d)}
nav.main ul{list-style:none;display:flex;flex-wrap:wrap;gap:.15rem .2rem;margin:0;padding:0}
nav.main a{display:block;padding:.4rem .65rem;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.93rem;font-weight:550}
nav.main a:hover,nav.main a[aria-current=page]{background:var(--gray);color:var(--blue-d)}
/* breadcrumbs */
.crumbs{font-size:.86rem;color:var(--muted);padding-top:1.1rem}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.3rem}
.crumbs li+li::before{content:"/";margin-right:.3rem;color:#8a98ad}
.crumbs a{color:var(--muted)}
/* hero */
.hero{background:linear-gradient(180deg,#fff 0%,var(--gray) 100%);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:var(--sp4);align-items:center;padding-top:var(--sp4);padding-bottom:var(--sp4)}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--blue-d);margin-bottom:.3rem}
.lede{font-size:1.12rem;color:var(--ink)}
.answer{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:var(--radius);padding:1rem 1.2rem;margin:1rem 0}
.answer p:last-child{margin:0}
.btns{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1rem}
.btn{display:inline-block;padding:.6rem 1.05rem;border-radius:9px;background:var(--blue-d);color:#fff;text-decoration:none;font-weight:650;font-size:.95rem}
.btn:hover{background:var(--navy);color:#fff}
.btn.ghost{background:#fff;color:var(--blue-d);border:1px solid #b8cdee}
.btn.ghost:hover{background:var(--gray);color:var(--navy)}
/* browser mock */
.browser{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 40px -22px rgba(11,37,69,.45);overflow:hidden}
.bbar{display:flex;align-items:center;gap:.5rem;padding:.55rem .75rem;background:var(--gray);border-bottom:1px solid var(--line)}
.dots{display:flex;gap:5px}.dots i{width:10px;height:10px;border-radius:50%;background:#c9d3e1;display:block}
.url{flex:1;background:#fff;border:1px solid var(--line);border-radius:20px;font-size:.78rem;color:var(--muted);padding:.2rem .7rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.exticon{width:22px;height:22px;border-radius:6px;background:var(--blue);display:grid;place-items:center}
.exticon img{width:18px;height:18px}
.bbody{display:grid;grid-template-columns:18px 1fr;gap:10px;padding:14px}
.evalbar{border-radius:4px;overflow:hidden;display:flex;flex-direction:column;border:1px solid var(--line)}
.evalbar .b{background:#2b2b2b}.evalbar .w{background:#f5f5f5;flex:1}
.bnote{font-size:.8rem;color:var(--muted);padding:0 14px 12px;margin:0}
/* board */
.board{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);aspect-ratio:1;width:100%;border:2px solid #3b4a63;border-radius:3px;overflow:hidden}
.sq{min-width:0;min-height:0;position:relative;background:#f0d9b5}
.sq.d{background:#b58863}
.sq.hl{background:#9fc4f5}.sq.d.hl{background:#6f9fe0}
.sq img{width:100%;height:100%;display:block}
.diagram{margin:1.5rem 0;max-width:360px}
.diagram figcaption,figure figcaption{font-size:.86rem;color:var(--muted);margin-top:.5rem;line-height:1.5}
/* photos */
figure{margin:1.75rem 0}
figure.photo img{border-radius:var(--radius);border:1px solid var(--line)}
/* sections */
.band{background:var(--gray);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:var(--sp4) 0;margin-top:var(--sp4)}
.band h2:first-child{margin-top:0}
.sec{padding:var(--sp3) 0}
/* extension cards */
.cards{display:grid;gap:1rem;margin:1.5rem 0}
.ext{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.15rem 1.25rem;display:grid;grid-template-columns:56px 1fr;gap:1rem;box-shadow:0 1px 2px rgba(11,37,69,.05)}
.ext.top{border:2px solid var(--blue);box-shadow:0 10px 30px -18px rgba(47,128,237,.6)}
.ico{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-weight:800;font-size:1.15rem;color:#fff;letter-spacing:-.02em}
.ico img{width:44px;height:44px}
.ext h3{margin:0;font-size:1.2rem}
.ext h3 a{color:var(--navy);text-decoration:none}
.ext h3 a:hover{text-decoration:underline}
.rank{display:inline-block;font-size:.75rem;font-weight:800;color:var(--blue-d);background:#e6f0fd;border-radius:6px;padding:.1rem .45rem;margin-right:.4rem;vertical-align:2px}
.meta{font-size:.85rem;color:var(--muted);margin:.15rem 0 .6rem}
.ext p{margin:.3rem 0 .6rem}
.who{font-size:.95rem}
.perm{background:var(--gray);border-radius:9px;padding:.6rem .8rem;font-size:.88rem;margin-top:.6rem}
.perm strong{display:block;font-size:.76rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:.2rem}
.perm ul{margin:0;padding-left:1.1rem}
.badges{display:flex;flex-wrap:wrap;gap:.35rem;margin:.5rem 0 0}
.badge{font-size:.76rem;font-weight:700;border-radius:20px;padding:.15rem .6rem;background:#e6f0fd;color:#174f9e}
.badge.safe{background:#e3f5ea;color:var(--green-d)}
.badge.warn{background:#fff3df;color:var(--amber)}
.ext .links{font-size:.9rem;margin-top:.6rem}
/* tables */
.tbl{overflow-x:auto;margin:1.25rem 0;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;font-size:.93rem;min-width:620px}
th,td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--gray);font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink)}
tbody tr:last-child td{border-bottom:0}
td.y{color:var(--green-d);font-weight:650}
/* callouts */
.note{border:1px solid #bfe3cc;background:#f2fbf5;border-radius:var(--radius);padding:1rem 1.2rem;margin:1.5rem 0}
.note.fair{border-color:#c9d8f2;background:#f3f7fd}
.note.warn{border-color:#f0d6a8;background:#fffaf0}
.note h2,.note h3{margin-top:0;font-size:1.1rem}
.note p:last-child,.note ul:last-child{margin-bottom:0}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1.25rem 0}
.tile{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem}
.tile h3{margin-top:0;font-size:1.05rem}
.tile p{margin:0;font-size:.95rem}
.tile a{font-weight:650}
/* faq */
.faq details{border:1px solid var(--line);border-radius:10px;background:#fff;margin:.5rem 0;padding:.2rem 1rem}
.faq summary{cursor:pointer;font-weight:650;padding:.6rem 0}
.faq details p{margin:.2rem 0 .8rem}
/* article */
.article-head{padding-bottom:.5rem}
.byline{font-size:.88rem;color:var(--muted)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:var(--sp4);align-items:start}
aside.side{position:sticky;top:1rem;background:var(--gray);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;font-size:.92rem}
aside.side h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 .5rem;color:var(--muted)}
aside.side ul{list-style:none;padding:0;margin:0 0 1rem}
aside.side li{margin:.35rem 0}
/* footer */
footer.site{margin-top:var(--sp5);background:var(--navy);color:#cfdbee;font-size:.92rem}
footer.site .wrap{padding-top:var(--sp4);padding-bottom:var(--sp3)}
footer.site a{color:#fff}
.fcols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--sp3)}
.fcols h2{color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 .6rem}
.fcols ul{list-style:none;padding:0;margin:0}
.fdisc{border-top:1px solid #29466e;margin-top:var(--sp3);padding-top:var(--sp2);font-size:.85rem;color:#b9c8df}
@media (max-width:900px){.hero .wrap,.layout{grid-template-columns:1fr}aside.side{position:static}.grid3{grid-template-columns:1fr}.fcols{grid-template-columns:1fr 1fr}}
@media (max-width:560px){body{font-size:16px}.ext{grid-template-columns:1fr}.ico{width:48px;height:48px}.fcols{grid-template-columns:1fr}nav.main a{padding:.35rem .5rem;font-size:.88rem}}
.hero .wrap>*,.layout>*,.grid3>*,.ext>*,.fcols>*{min-width:0}
h1,h2,h3{overflow-wrap:break-word}