:root{
  --steel:#131B24;      /* page dark */
  --plate:#1F2A36;      /* raised dark surface */
  --seam:#34424F;       /* hairline on dark */
  --paper:#F3F4F2;      /* light surface */
  --paper-2:#E6E9EA;
  --ink:#141A20;
  --ink-2:#4A5560;
  --chrome:#C9CED3;     /* silver text on dark */
  --signal:#2F8BE0;     /* the blue rule from the brand header */
  --signal-deep:#1C63A8;
  --display:"Barlow Condensed",Impact,"Arial Narrow",sans-serif;
  --body:"Source Sans 3","Segoe UI",Helvetica,Arial,sans-serif;
  --wrap:1180px;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){ } }
:root[data-theme="dark"]{ }
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.55}
img{max-width:100%;display:block}
a{color:var(--signal-deep)}
h1,h2,h3{font-family:var(--display);font-weight:800;line-height:.95;letter-spacing:-.01em;margin:0}
h2{font-size:clamp(2.2rem,4.5vw,3.4rem)}
h3{font-size:1.5rem;font-weight:600;letter-spacing:0}
p{margin:0 0 1em;max-width:62ch}
.wrap{width:min(var(--wrap),100% - 2.5rem);margin-inline:auto}
:focus-visible{outline:3px solid var(--signal);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- header / nav ---------- */
.top{background:var(--steel);color:var(--chrome);border-bottom:1px solid var(--seam);position:sticky;top:0;z-index:50}
.top .wrap{display:flex;align-items:center;gap:1.25rem;min-height:74px}
.brand{display:flex;align-items:center;gap:.8rem;color:#fff;text-decoration:none;margin-right:auto}
.brand img{width:54px;height:54px;object-fit:cover;border-radius:50%}
.brand b{font-family:var(--display);font-size:1.35rem;font-weight:800;letter-spacing:.02em;line-height:1}
.brand small{display:block;font-family:var(--body);font-weight:400;font-size:.8rem;color:var(--chrome);letter-spacing:.04em}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:.25rem;align-items:center}
nav a,nav button{font:600 .95rem/1 var(--body);color:var(--chrome);text-decoration:none;padding:.7rem .8rem;border-radius:4px;background:none;border:0;cursor:pointer}
nav a:hover,nav button:hover{color:#fff;background:var(--plate)}
.has-menu{position:relative}
.has-menu button::after{content:"";display:inline-block;width:.45em;height:.45em;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-left:.5em;position:relative;top:-.15em}
.menu{position:absolute;right:0;top:calc(100% + .35rem);min-width:340px;max-width:440px;max-height:75vh;overflow-y:auto;background:var(--plate);border:1px solid var(--seam);border-top:3px solid var(--signal);border-radius:6px;padding:.5rem;display:none;box-shadow:0 18px 40px rgba(0,0,0,.45)}
.menu .grp{font:700 .72rem/1 var(--body);text-transform:uppercase;letter-spacing:.05em;color:var(--signal);padding:.9rem .7rem .3rem}
.has-menu[aria-expanded="true"] .menu,.has-menu:focus-within .menu{display:block}
.menu a{display:block;padding:.6rem .7rem;color:#fff;font-weight:400;font-size:.95rem;line-height:1.3}
.menu a span{display:block;color:var(--chrome);font-size:.8rem}
.menu .all{margin-top:.25rem;border-top:1px solid var(--seam);font-weight:600;color:var(--signal)}
.call{display:inline-flex;align-items:center;gap:.5rem;background:var(--signal);color:#fff!important;padding:.7rem 1rem;border-radius:4px;font-weight:600;white-space:nowrap}
.call:hover{background:var(--signal-deep)!important}
.burger{display:none;background:none;border:1px solid var(--seam);color:#fff;border-radius:4px;padding:.55rem .7rem;font:600 .9rem var(--body)}
@media (max-width:900px){
  .burger{display:inline-block}
  nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--steel);border-bottom:1px solid var(--seam);padding:.75rem 1.25rem 1rem}
  nav.open{display:block}
  nav ul{flex-direction:column;align-items:stretch;gap:0}
  nav a,nav button{display:block;width:100%;text-align:left;padding:.85rem .5rem}
  .menu{position:static;box-shadow:none;max-width:none;margin:.25rem 0 .5rem}
  .brand small{display:none}
}

/* ---------- hero ---------- */
.hero{background:var(--steel);position:relative}
.hero img{width:100%;height:auto;aspect-ratio:1568/672;object-fit:cover;object-position:18% center}
@media (max-width:700px){.hero img{aspect-ratio:auto;height:78vw;min-height:320px;object-position:0 center}}
.hero-bar{background:var(--steel);color:#fff;border-top:1px solid var(--seam)}
.hero-bar .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:1rem 2rem;padding:1.1rem 0}
.hero-bar p{margin:0;color:var(--chrome);max-width:none;flex:1 1 380px}
.hero-bar .btns{display:flex;gap:.6rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.8rem 1.25rem;border-radius:4px;font-weight:600;text-decoration:none;border:1px solid transparent}
.btn-solid{background:var(--signal);color:#fff}.btn-solid:hover{background:var(--signal-deep)}
.btn-line{border-color:var(--chrome);color:#fff}.btn-line:hover{border-color:#fff;background:var(--plate)}

/* ---------- sections ---------- */
section{padding:5rem 0}
.lede{font-size:1.25rem;color:var(--ink-2);max-width:56ch}
.kicker{color:var(--signal-deep);font-weight:600;margin-bottom:.5rem}

.pillars{background:var(--paper)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--paper-2);border:1px solid var(--paper-2);margin-top:2.5rem}
.grid-4 article{background:#fff;padding:1.6rem 1.4rem 1.8rem;border-top:4px solid var(--steel)}
.grid-4 article h3{margin-bottom:.5rem}
.grid-4 article p{font-size:1rem;color:var(--ink-2);margin:0}
.grid-4 svg{width:34px;height:34px;stroke:var(--signal-deep);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;margin-bottom:1rem}
@media (max-width:900px){.grid-4{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.grid-4{grid-template-columns:1fr}}

.dark{background:var(--steel);color:#fff}
.dark .lede{color:var(--chrome)}
.two{display:grid;grid-template-columns:1fr 1.3fr;gap:3rem;align-items:start}
@media (max-width:860px){.two{grid-template-columns:1fr}}
.svc{list-style:none;margin:0;padding:0;columns:2;column-gap:2rem}
.svc li{break-inside:avoid;padding:.6rem 0;border-bottom:1px solid var(--seam);color:#fff}
.svc li a{color:#fff;text-decoration:none;font-weight:600}
.svc li a:hover{color:var(--signal);text-decoration:underline}
.svc li small{display:block;color:var(--chrome);font-size:.9rem}
@media (max-width:600px){.svc{columns:1}}

/* papers */
.papers-head{display:flex;justify-content:space-between;align-items:end;gap:2rem;flex-wrap:wrap}
.paper-group{margin-top:2.75rem}
.paper-group h3{font-size:1.05rem;text-transform:uppercase;letter-spacing:.04em;color:var(--signal-deep);font-weight:800;margin-bottom:1rem;padding-bottom:.6rem;border-bottom:2px solid var(--paper-2)}
.paper-list{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
@media (max-width:900px){.paper-list{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.paper-list{grid-template-columns:1fr}}
.lib-count{color:var(--ink-2);font-size:.95rem;margin-top:.5rem}
.paper{background:#fff;border:1px solid var(--paper-2);border-left:4px solid var(--signal);padding:1.25rem 1.25rem 1.1rem;display:flex;flex-direction:column;text-decoration:none;color:var(--ink)}
.paper:hover{border-color:var(--signal)}
.paper .tag{font-size:.85rem;color:var(--signal-deep);font-weight:600;margin-bottom:.35rem}
.paper h3{font-size:1.3rem;margin-bottom:.4rem}
.paper p{font-size:.98rem;color:var(--ink-2);margin:0 0 .9rem;max-width:none}
.paper time{margin-top:auto;font-size:.85rem;color:var(--ink-2)}
.empty{border:1px dashed var(--seam);padding:2rem;color:var(--ink-2);text-align:center;grid-column:1/-1}

/* about */
.about .two{grid-template-columns:1.2fr 1fr}
@media (max-width:860px){.about .two{grid-template-columns:1fr}}
.cred{background:#fff;border:1px solid var(--paper-2);padding:1.5rem}
.cred dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:.55rem 1.25rem;font-size:.98rem}
.cred dt{color:var(--ink-2);font-weight:600}
.cred dd{margin:0}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin-top:2.5rem}
@media (max-width:860px){.quotes{grid-template-columns:1fr}}
.quotes blockquote{margin:0;background:#fff;border:1px solid var(--paper-2);padding:1.4rem;font-size:1rem}
.quotes blockquote p{margin:0 0 .8rem;max-width:none}
.quotes cite{font-style:normal;color:var(--ink-2);font-size:.9rem}

/* area + contact */
.area{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.25rem}
.area span{background:var(--plate);border:1px solid var(--seam);color:#fff;padding:.45rem .9rem;border-radius:3px;font-weight:600}
.contact .two{grid-template-columns:1fr 1fr}
@media (max-width:860px){.contact .two{grid-template-columns:1fr}}
.contact dl{margin:1.5rem 0 0;display:grid;grid-template-columns:auto 1fr;gap:.7rem 1.5rem}
.contact dt{font-weight:600;color:var(--chrome)}
.contact dd{margin:0}.contact dd a{color:#fff}
.form{background:var(--plate);border:1px solid var(--seam);padding:1.5rem}
.form label{display:block;font-size:.9rem;color:var(--chrome);margin:.9rem 0 .3rem}
.form input,.form select,.form textarea{width:100%;background:var(--steel);border:1px solid var(--seam);color:#fff;padding:.7rem .8rem;border-radius:4px;font:inherit}
.form textarea{min-height:120px;resize:vertical}
.form button{margin-top:1.2rem}
.form .note{font-size:.85rem;color:var(--chrome);margin:.75rem 0 0}

footer{background:#0D131A;color:var(--chrome);padding:2.5rem 0;font-size:.92rem;border-top:1px solid var(--seam)}
footer .wrap{display:flex;flex-wrap:wrap;gap:1rem 2.5rem;justify-content:space-between;align-items:center}
footer a{color:var(--chrome)}

/* ---------- paper / article pages ---------- */
.crumb{background:var(--paper-2);border-bottom:1px solid #d9dcda}
.crumb .wrap{padding:.75rem 0;font-size:.9rem;color:var(--ink-2)}
.crumb a{color:var(--ink-2);text-decoration:none;border-bottom:1px solid transparent}
.crumb a:hover{color:var(--signal-deep);border-color:var(--signal-deep)}
.article-head{background:var(--steel);color:#fff;padding:3.5rem 0 2.75rem}
.article-head .tag{display:inline-block;background:var(--signal);color:#fff;font-weight:600;font-size:.85rem;padding:.3rem .7rem;border-radius:3px;margin-bottom:1rem}
.article-head h1{font-size:clamp(2rem,4.2vw,3.1rem);max-width:22ch}
.article-head .dek{color:var(--chrome);font-size:1.15rem;margin-top:1rem;max-width:60ch}
.article-head .byline{color:var(--chrome);font-size:.9rem;margin-top:1.5rem;border-top:1px solid var(--seam);padding-top:1rem;max-width:none}
.article-body-wrap{padding:3.5rem 0 4.5rem}
.article-grid{display:grid;grid-template-columns:1fr 260px;gap:3.5rem;align-items:start}
@media (max-width:900px){.article-grid{grid-template-columns:1fr}}
.article-body{max-width:70ch;font-size:1.08rem}
.article-body h2{font-size:1.55rem;margin:2.2rem 0 .9rem;font-weight:800}
.article-body h3{font-size:1.2rem;margin:1.6rem 0 .6rem}
.article-body p{max-width:none}
.article-body ul,.article-body ol{padding-left:1.3rem;margin:0 0 1.2rem;max-width:70ch}
.article-body li{margin-bottom:.4rem}
.article-body strong{color:var(--ink)}
.article-body blockquote{border-left:4px solid var(--signal);margin:1.6rem 0;padding:.3rem 0 .3rem 1.2rem;color:var(--ink-2);font-style:italic}
.article-body a{text-decoration-thickness:1px}
.rail{position:sticky;top:95px;display:flex;flex-direction:column;gap:1.5rem}
.rail .box{background:var(--paper);border:1px solid var(--paper-2);padding:1.25rem}
.rail .box h3{font-size:1rem;text-transform:none;margin-bottom:.8rem;font-weight:800}
.rail .box p{font-size:.92rem;color:var(--ink-2);margin-bottom:1rem}
.rail .related{list-style:none;margin:0;padding:0;font-size:.92rem}
.rail .related li{margin-bottom:.75rem}
.rail .related a{color:var(--ink);text-decoration:none;font-weight:600;line-height:1.35;display:block}
.rail .related a:hover{color:var(--signal-deep)}
.rail .related span{display:block;font-weight:400;color:var(--ink-2);font-size:.82rem;margin-top:.15rem}
.back-home{display:inline-flex;align-items:center;gap:.5rem;color:var(--chrome);text-decoration:none;font-weight:600;font-size:.95rem}
.back-home:hover{color:#fff}
.back-home svg{width:16px;height:16px}
.article-end{border-top:1px solid var(--paper-2);margin-top:3rem;padding-top:2rem;display:flex;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;align-items:center}

/* ---------- standards page ---------- */
.std-cat{margin-bottom:3rem}
.std-cat h2{font-size:1.7rem;margin-bottom:.4rem}
.std-cat>p{color:var(--ink-2);margin-bottom:1.5rem}
.std-table{width:100%;border-collapse:collapse;font-size:.98rem}
.std-table th{text-align:left;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-2);border-bottom:2px solid var(--ink);padding:.5rem .6rem}
.std-table td{padding:.75rem .6rem;border-bottom:1px solid var(--paper-2);vertical-align:top}
.std-table tr:hover td{background:var(--paper)}
.std-table code{background:var(--paper-2);padding:.1rem .35rem;border-radius:3px;font-size:.9em}
.std-note{background:var(--paper);border-left:4px solid var(--signal);padding:1rem 1.25rem;font-size:.95rem;color:var(--ink-2);margin:0 0 2.5rem}

/* ---------- client review ticker ---------- */
.reviews{background:var(--steel);padding:3.5rem 0 3rem;overflow:hidden;border-top:1px solid var(--seam)}
.reviews-head{margin-bottom:2rem}
.ticker-wrap{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent);mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent)}
.ticker-track{display:flex;gap:1.25rem;width:max-content;animation:ticker 75s linear infinite}
.ticker-wrap:hover .ticker-track,.ticker-wrap:focus-within .ticker-track{animation-play-state:paused}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.rcard{flex:0 0 340px;background:var(--plate);border:1px solid var(--seam);border-top:3px solid var(--signal);border-radius:6px;padding:1.4rem;margin:0}
.rcard p{color:#fff;font-size:.98rem;line-height:1.5;margin:0 0 1rem;max-width:none}
.rcard cite{font-style:normal;color:var(--chrome);font-weight:600;font-size:.9rem}
@media (prefers-reduced-motion:reduce){
  .ticker-track{animation:none;overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:.5rem}
  .rcard{scroll-snap-align:start}
  .ticker-track > [aria-hidden="true"]{display:none}
}
@media (max-width:600px){.rcard{flex-basis:280px}}

/* ---------- development series landing page ---------- */
.phase-block{margin-bottom:3.5rem}
.phase-block h2{font-size:1.6rem;margin-bottom:.3rem}
.phase-block>p{color:var(--ink-2);margin-bottom:1.5rem}
.phase-list{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
@media (max-width:700px){.phase-list{grid-template-columns:1fr}}
.phase-item{display:flex;gap:1rem;align-items:flex-start;background:#fff;border:1px solid var(--paper-2);border-left:4px solid var(--signal);padding:1.1rem 1.25rem;text-decoration:none;color:var(--ink)}
.phase-item:hover{border-color:var(--signal)}
.phase-item .num{flex:0 0 auto;font-family:var(--display);font-weight:800;font-size:1.6rem;color:var(--signal-deep);min-width:2.2rem}
.phase-item h3{font-size:1.05rem;margin-bottom:.25rem}
.phase-item p{font-size:.92rem;color:var(--ink-2);margin:0;max-width:none}

/* ---------- document library scrolling banner ---------- */
.doclib{background:var(--paper);padding:3.5rem 0 3rem;border-top:1px solid var(--paper-2)}
.doclib-head{margin-bottom:1.75rem;display:flex;justify-content:space-between;align-items:end;gap:1.5rem;flex-wrap:wrap}
.doclib-head h2{font-size:1.9rem}
.doclib-head p{color:var(--ink-2);margin:0}
.doclib-wrap{overflow-x:auto;overflow-y:hidden;scroll-behavior:smooth;-webkit-mask-image:linear-gradient(90deg,transparent,#000 2%,#000 98%,transparent);mask-image:linear-gradient(90deg,transparent,#000 2%,#000 98%,transparent);scrollbar-width:none}
.doclib-wrap::-webkit-scrollbar{display:none}
.doclib-track{display:flex;gap:1.1rem;width:max-content;padding:.25rem .25rem 1rem}
.dc-card{flex:0 0 168px;text-decoration:none;color:var(--ink);background:#fff;border:1px solid var(--paper-2);border-radius:6px;overflow:hidden;transition:box-shadow .15s,transform .15s}
.dc-card:hover{box-shadow:0 10px 24px rgba(20,26,32,.14);transform:translateY(-2px);border-color:var(--signal)}
.dc-card img{width:100%;height:216px;object-fit:cover;object-position:top;display:block;border-bottom:1px solid var(--paper-2);background:#f3f4f2}
.dc-card .dc-title{padding:.65rem .7rem .8rem;font-size:.85rem;font-weight:600;line-height:1.3;display:block}
@media (prefers-reduced-motion:reduce){.doclib-wrap{scroll-behavior:auto}}
@media (max-width:600px){.dc-card{flex:0 0 138px}.dc-card img{height:178px}}

/* ---------- expert roster carousel (center-highlight) ---------- */
.experts{background:var(--steel);padding:3.5rem 0 3rem;border-top:1px solid var(--seam);overflow:hidden}
.experts-head{margin-bottom:1.75rem}
.experts-head h2{color:#fff;font-size:1.9rem}
.experts-head p{color:var(--chrome);margin:0}
.ex-wrap{overflow-x:auto;overflow-y:hidden;scroll-snap-type:x mandatory;scroll-behavior:smooth;scrollbar-width:none;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.ex-wrap::-webkit-scrollbar{display:none}
.ex-track{display:flex;align-items:center;gap:1.5rem;width:max-content;padding:1.5rem calc(50% - 95px) 1.5rem}
.ex-card{scroll-snap-align:center;flex:0 0 190px;text-decoration:none;color:#fff;text-align:center;opacity:.55;transform:scale(.86);transition:opacity .35s ease,transform .35s ease}
.ex-card img{width:190px;height:240px;object-fit:cover;border-radius:8px;border:2px solid var(--seam);display:block;margin:0 auto .8rem;background:#fff}
.ex-card .ex-name{display:block;font-weight:700;font-size:1rem;line-height:1.25}
.ex-card .ex-title{display:block;color:var(--chrome);font-size:.82rem;margin-top:.2rem;line-height:1.3}
.ex-card.active{opacity:1;transform:scale(1.08)}
.ex-card.active img{border-color:var(--signal);box-shadow:0 12px 30px rgba(0,0,0,.4)}
@media (max-width:600px){
  .ex-track{padding:1.5rem calc(50% - 75px) 1.5rem}
  .ex-card{flex-basis:150px}
  .ex-card img{width:150px;height:190px}
}
@media (prefers-reduced-motion:reduce){.ex-wrap{scroll-behavior:auto}}