/* Layout: calm two-column hero with a live snapshot instrument; ruled sections, no card walls. Original cool-white and cobalt palette with a soft blue gradient wash behind the hero and closing call to action. */
:root{
  --bg:#F8FAFC; --surface:#FFFFFF; --ink:#0F1B2D; --muted:#516078; --line:#DCE3EE;
  --accent:#1B4FD8; --accent-ink:#FFFFFF; --tint:#EAF0FE; --ok:#14804A; --pin:#1B4FD8;
  --g1:#DCE7FF; --g2:#F8FAFC; --glow:rgba(27,79,216,.20);
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0B1424; --surface:#111D31; --ink:#E8EDF5; --muted:#9AA8BF; --line:#23324B;
  --accent:#6C97FF; --accent-ink:#0B1424; --tint:#15264A; --ok:#4CC38A; --pin:#6C97FF;
  --g1:#12295C; --g2:#0B1424; --glow:rgba(108,151,255,.28); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0B1424; --surface:#111D31; --ink:#E8EDF5; --muted:#9AA8BF; --line:#23324B;
  --accent:#6C97FF; --accent-ink:#0B1424; --tint:#15264A; --ok:#4CC38A; --pin:#6C97FF;
  --g1:#12295C; --g2:#0B1424; --glow:rgba(108,151,255,.28); color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit}
.wrap{max-width:1160px;margin-inline:auto;padding-inline:20px}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.01em;line-height:1.15;margin:0;text-wrap:balance}
h1{font-size:clamp(2.2rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.2vw,2.35rem)}
h3{font-size:1.2rem}
p{margin:0}
.eyebrow{font:500 .75rem/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.lede{font-size:1.15rem;color:var(--muted);max-width:60ch}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.8rem 1.25rem;border-radius:6px;font-weight:600;text-decoration:none;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);cursor:pointer;font-family:inherit;font-size:1rem}
.btn.ghost{background:transparent;color:var(--accent)}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
section{padding-block:72px}
.rule{border-top:1px solid var(--line)}
/* nav */
header.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font:600 1.15rem var(--serif);text-decoration:none}
.nav nav{display:flex;gap:24px;font-size:.92rem;color:var(--muted)}
.nav nav a{text-decoration:none}.nav nav a:hover{color:var(--ink)}
.back-unused{font:500 .75rem var(--mono);color:var(--muted);text-decoration:none;border:1px solid var(--line);padding:.35rem .6rem;border-radius:4px}
@media(max-width:820px){.nav nav{display:none}}
/* hero */
.hero{padding-block:64px 72px;background:radial-gradient(60% 70% at 85% 10%,var(--glow),transparent 70%),linear-gradient(180deg,var(--g1) 0%,var(--g2) 100%);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero .copy{display:flex;flex-direction:column;gap:22px;min-width:0}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
@media(max-width:940px){.hero .wrap{grid-template-columns:1fr;gap:40px}}
/* instrument */
.inst{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:22px;display:flex;flex-direction:column;gap:18px;min-width:0;box-shadow:0 24px 50px -36px rgba(0,0,0,.6)}
.inst-h{display:flex;justify-content:space-between;gap:12px;font:500 .72rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.bars{display:flex;align-items:flex-end;gap:3px;height:110px;position:relative}
.bar{flex:1;border-radius:2px 2px 0 0;background:var(--line);min-width:0;transition:background .15s,height .15s}
.bar.on{background:color-mix(in srgb,var(--accent) 45%,var(--line))}
.bar.pin{background:var(--pin)}
.pinlabel{position:absolute;top:-2px;font:500 .68rem var(--mono);color:var(--pin);white-space:nowrap;transform:translateX(-50%)}
.slider{display:flex;flex-direction:column;gap:6px}
.slider label{font:500 .8rem var(--mono);color:var(--muted);display:flex;justify-content:space-between}
input[type=range]{width:100%;accent-color:var(--accent)}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.stat{border:1px solid var(--line);border-radius:8px;padding:12px 14px;display:flex;flex-direction:column;gap:2px;min-width:0}
.stat small{font:500 .68rem var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.stat b{font:600 1.7rem/1.1 var(--serif);font-variant-numeric:tabular-nums}
.stat.pinned{background:var(--tint);border-color:transparent}
.stat.pinned b{color:var(--pin)}
.note{font-size:.82rem;color:var(--muted)}
.note em{font-style:normal;color:var(--ok);font-weight:600}
/* standards */
.strip{padding-block:26px;border-block:1px solid var(--line);background:var(--surface)}
.strip .wrap{display:flex;flex-wrap:wrap;gap:12px 36px;align-items:center;justify-content:space-between}
.strip span.k{font:500 .72rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.strip ul{display:flex;flex-wrap:wrap;gap:8px 28px;margin:0;padding:0;list-style:none;font-weight:500}
/* problem */
.problem .wrap{display:grid;grid-template-columns:1fr 1.4fr;gap:56px}
.problem ol{margin:0;padding:0;list-style:none;display:flex;flex-direction:column}
.problem li{padding:20px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:auto 1fr;gap:6px 20px}
.problem li:last-child{border-bottom:1px solid var(--line)}
.problem li b{font:600 1.1rem var(--serif)}
.problem li span{color:var(--muted);grid-column:2}
@media(max-width:820px){.problem .wrap{grid-template-columns:1fr;gap:28px}}
/* pillars */
.head{display:flex;flex-direction:column;gap:14px;margin-bottom:40px}
.pillars{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.pillar{padding:24px 24px 8px 0;display:flex;flex-direction:column;gap:10px;min-width:0}
.pillar+.pillar{padding-left:24px;border-left:1px solid var(--line)}
.pillar p{color:var(--muted);font-size:.95rem}
.pillar .ico{width:28px;height:28px;color:var(--accent)}
@media(max-width:940px){.pillars{grid-template-columns:1fr 1fr}.pillar:nth-child(3){padding-left:0;border-left:0}.pillar:nth-child(n+3){border-top:1px solid var(--line);margin-top:16px;padding-top:24px}}
@media(max-width:560px){.pillars{grid-template-columns:1fr}.pillar,.pillar+.pillar{padding:20px 0;border-left:0;border-top:1px solid var(--line);margin:0}.pillar:first-child{border-top:0}}
/* flow */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:s}
.step{padding:22px 22px 22px 0;display:flex;flex-direction:column;gap:8px;position:relative;min-width:0}
.step::before{counter-increment:s;content:counter(s);font:500 .8rem var(--mono);color:var(--accent-ink);background:var(--accent);width:26px;height:26px;border-radius:50%;display:grid;place-items:center}
.step::after{content:"";position:absolute;top:35px;left:36px;right:8px;height:1px;background:var(--line)}
.step:last-child::after{display:none}
.step p{color:var(--muted);font-size:.95rem}
@media(max-width:820px){.flow{grid-template-columns:1fr 1fr}.step::after{display:none}}
@media(max-width:520px){.flow{grid-template-columns:1fr}}
/* capabilities */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:0 40px}
.cap{padding:24px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;min-width:0}
.cap p{color:var(--muted);font-size:.95rem}
.cap .tag{font:500 .68rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
@media(max-width:940px){.caps{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.caps{grid-template-columns:1fr}}
/* record */
.record .wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.ledger{background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden;min-width:0}
.ledger .top{padding:12px 18px;border-bottom:1px solid var(--line);font:500 .72rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);display:flex;justify-content:space-between;gap:8px}
.ledger dl{margin:0;display:grid;grid-template-columns:auto 1fr}
.ledger dt,.ledger dd{padding:11px 18px;border-bottom:1px solid var(--line);margin:0;font-size:.88rem}
.ledger dt{color:var(--muted);font-family:var(--mono);font-size:.78rem}
.ledger dd{font-family:var(--mono);word-break:break-word}
.ledger dl>*:nth-last-child(-n+2){border-bottom:0}
.ok{color:var(--ok)}
@media(max-width:820px){.record .wrap{grid-template-columns:1fr;gap:32px}}
/* security */
.sec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.sec-item{padding:18px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr;gap:4px}
.sec-item b{font-weight:600}.sec-item span{color:var(--muted);font-size:.95rem}
@media(max-width:760px){.sec-grid{grid-template-columns:1fr}}
/* audience */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:12px 16px;font:500 .95rem var(--sans);color:var(--muted);cursor:pointer;margin-bottom:-1px}
.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--accent)}
.panel{padding-top:28px;display:grid;grid-template-columns:1fr 1fr;gap:32px 56px}
.panel ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:12px}
.panel li{padding-left:22px;position:relative;color:var(--muted)}
.panel li::before{content:"";position:absolute;left:0;top:.62em;width:10px;height:2px;background:var(--accent)}
.panel h3{margin-bottom:8px}
@media(max-width:760px){.panel{grid-template-columns:1fr}}
/* contact */
.contact{background:radial-gradient(60% 90% at 10% 100%,var(--glow),transparent 70%),linear-gradient(0deg,var(--g1) 0%,var(--g2) 100%);border-block:1px solid var(--line)}
.contact .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px}
form{display:grid;gap:14px}
.f{display:flex;flex-direction:column;gap:6px}
.f label{font-size:.85rem;font-weight:500}
.f input,.f select,.f textarea{font:inherit;padding:.7rem .8rem;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);width:100%}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.sent{padding:14px 16px;border:1px solid var(--line);border-left:3px solid var(--ok);border-radius:6px;font-size:.92rem}
@media(max-width:820px){.contact .wrap{grid-template-columns:1fr;gap:32px}.two{grid-template-columns:1fr}}
footer{padding-block:36px;color:var(--muted);font-size:.88rem}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between}
footer nav{display:flex;gap:20px;flex-wrap:wrap}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* ---- subpage additions ---- */
.phero{padding-block:72px 64px;background:radial-gradient(60% 80% at 88% 0%,var(--glow),transparent 70%),linear-gradient(180deg,var(--g1) 0%,var(--g2) 100%);border-bottom:1px solid var(--line)}
.phero .wrap{display:flex;flex-direction:column;gap:22px}
.phero h1{max-width:18ch}
.nav nav a[aria-current=page]{color:var(--ink);font-weight:600}
.subnav{position:sticky;top:calc(64px + env(safe-area-inset-top,0px));z-index:9;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.subnav .wrap{display:flex;gap:6px;overflow-x:auto;padding-block:8px;scrollbar-width:none}
.subnav a{white-space:nowrap;text-decoration:none;font:500 .82rem var(--mono);color:var(--muted);padding:.4rem .75rem;border-radius:999px;border:1px solid transparent}
.subnav a:hover{color:var(--ink);border-color:var(--line)}
.feat{display:grid;grid-template-columns:.85fr 1.25fr;gap:56px;align-items:start}
.feat .l{display:flex;flex-direction:column;gap:16px;position:sticky;top:calc(64px + 56px + 24px)}
@media(max-width:900px){.feat{grid-template-columns:1fr;gap:28px}.feat .l{position:static}}
.items{display:flex;flex-direction:column;min-width:0}
.it{padding:18px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:6px 28px}
.it:last-child{border-bottom:1px solid var(--line)}
.it b{font-weight:600}.it span{color:var(--muted);font-size:.96rem}
@media(max-width:600px){.it{grid-template-columns:1fr}}
.tblw{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--surface);margin-top:8px}
table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{font:500 .7rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--tint)}
tr:last-child td{border-bottom:0}
td:first-child{font-weight:600;white-space:nowrap}
td.m{color:var(--muted)}
.diag{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:8px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--surface)}
.dg{padding:18px 18px;display:flex;flex-direction:column;gap:6px;min-width:0}
.dg+.dg{border-left:1px solid var(--line)}
.dg .lab{font:500 .68rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.dg p{color:var(--muted);font-size:.9rem}
.dg.hl{background:var(--tint)}
@media(max-width:640px){.diag{grid-template-columns:1fr}.dg+.dg{border-left:0;border-top:1px solid var(--line)}}
.opt{display:inline-block;font:500 .66rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:.3rem .55rem;margin-left:8px;vertical-align:middle}
.also{display:grid;grid-template-columns:repeat(4,1fr);gap:0 32px}
.also>div{padding:20px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.also p{color:var(--muted);font-size:.93rem}
@media(max-width:900px){.also{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.also{grid-template-columns:1fr}}
.band{background:radial-gradient(60% 90% at 10% 100%,var(--glow),transparent 70%),linear-gradient(0deg,var(--g1) 0%,var(--g2) 100%);border-block:1px solid var(--line);padding-block:72px}
.band .wrap{display:flex;flex-wrap:wrap;gap:24px 48px;align-items:center;justify-content:space-between}
.band h2{max-width:20ch}
.callout{border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;padding:14px 18px;background:var(--surface);color:var(--muted);font-size:.95rem}
/* mobile-menu */
.menu-btn{display:none;align-items:center;gap:6px;background:none;border:1px solid var(--line);color:var(--ink);border-radius:6px;padding:.4rem .7rem;font:500 .85rem var(--sans);cursor:pointer}
@media(max-width:1000px){
  .menu-btn{display:inline-flex}
  .nav nav{display:none}
  .nav.open nav{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:2px;background:var(--bg);border-bottom:1px solid var(--line);padding:10px 20px 16px}
  .nav.open nav a{padding:.6rem 0;font-size:1rem}
}
@media(min-width:1001px){.nav nav{display:flex}}

.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.card{padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;gap:10px;min-width:0}
.card p{color:var(--muted);font-size:.95rem}
.card .lab{font:500 .68rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
@media(max-width:900px){.cards3{grid-template-columns:1fr}}
details{border-top:1px solid var(--line);padding:16px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font:500 1.2rem var(--mono);color:var(--accent)}
details[open] summary::after{content:"\2212"}
details p{color:var(--muted);margin-top:10px;max-width:70ch}
summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
pre.code{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;font:400 .82rem/1.7 var(--mono);overflow-x:auto;white-space:pre;color:var(--ink)}
.chip{display:inline-block;font:500 .66rem/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:.32rem .55rem;background:var(--tint);color:var(--accent)}
.search{width:100%;max-width:520px;padding:.8rem 1rem;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit}
.gl{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.gl>div{padding:16px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:4px;min-width:0}
.gl b{font-weight:600}.gl span{color:var(--muted);font-size:.95rem}
@media(max-width:760px){.gl{grid-template-columns:1fr}}
.nx{display:grid;grid-template-columns:auto 1fr;gap:4px 18px;padding:18px 0;border-top:1px solid var(--line)}
.nx:last-child{border-bottom:1px solid var(--line)}
.nx i{font:500 .8rem var(--mono);color:var(--accent-ink);background:var(--accent);width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-style:normal;grid-row:span 2}
.nx b{font-weight:600}.nx span{color:var(--muted);font-size:.95rem}
.ph{border:1px dashed var(--line);border-radius:12px;padding:20px;color:var(--muted);font-size:.93rem}
.contactgrid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
@media(max-width:860px){.contactgrid{grid-template-columns:1fr;gap:32px}}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:600px){.two{grid-template-columns:1fr}}
form{display:grid;gap:14px}
.f{display:flex;flex-direction:column;gap:6px}
.f label{font-size:.85rem;font-weight:500}
.f input,.f select,.f textarea{font:inherit;padding:.7rem .8rem;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--ink);width:100%}
.sent{padding:14px 16px;border:1px solid var(--line);border-left:3px solid var(--ok);border-radius:6px;font-size:.92rem}
/* ---- site additions ---- */
.hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.sent.err{border-left-color:#C2410C}
.skip{position:absolute;left:-10000px;top:8px;background:var(--accent);color:var(--accent-ink);padding:.6rem 1rem;border-radius:6px;z-index:20}
.skip:focus{left:8px}
.signin{font-size:.92rem;color:var(--muted);text-decoration:none}
.signin:hover{color:var(--ink)}
@media(max-width:640px){.signin{display:none}}
.draft{border:1px solid var(--line);border-left:3px solid #C2410C;border-radius:8px;padding:14px 18px;background:var(--surface);color:var(--muted)}
.prose{max-width:70ch;display:flex;flex-direction:column;gap:16px}
.prose p{color:var(--muted)}
.prose ul{margin:0;padding-left:1.2rem;color:var(--muted);display:flex;flex-direction:column;gap:6px}