:root{
  --navy:#1F3A5F; --navy-d:#152A45; --blue:#2E75B6; --blue-l:#4A90D0;
  --slate:#6B7280; --lslate:#F1F5F9; --line:#D8E0EA;
  --ink:#13202F; --ink-2:#3D4B5C; --paper:#FFFFFF;
  --amber:#B45309; --green:#15803D; --red:#B91C1C;
  --sans:Arial,Helvetica,"Helvetica Neue",sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --wrap:1180px; --gut:clamp(20px,5vw,56px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:17px;line-height:1.62;
  color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}

/* ---------- skip + shell ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;
  padding:12px 18px;z-index:200;font-weight:bold}
.skip:focus{left:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gut)}
.narrow{max-width:760px}

/* ---------- type scale: deliberate, not uniform ---------- */
h1,h2,h3,h4{margin:0;line-height:1.14;letter-spacing:-.022em;color:var(--navy);
  font-weight:bold;text-wrap:balance}
h1{font-size:clamp(2.2rem,5.4vw,3.5rem)}
h2{font-size:clamp(1.65rem,3.6vw,2.5rem)}
h3{font-size:clamp(1.12rem,1.9vw,1.4rem);letter-spacing:-.012em}
h4{font-size:1rem;letter-spacing:.02em}
p{margin:0 0 1.05em}
.lede{font-size:clamp(1.1rem,1.9vw,1.35rem);line-height:1.5;color:var(--ink-2);
  max-width:60ch}
.kicker{font-family:var(--mono);font-size:.7rem;letter-spacing:.17em;
  text-transform:uppercase;color:var(--blue);margin:0 0 14px;font-weight:bold}
.kicker.on-dark{color:#8FBCE6}
.mono{font-family:var(--mono);font-size:.93em;letter-spacing:-.01em}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(170%) blur(9px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:26px;height:70px}
.brand{display:inline-flex;align-items:baseline;gap:0;font-weight:bold;font-size:1.12rem;
  color:var(--navy);letter-spacing:-.02em;white-space:nowrap}
.brand b{color:var(--blue);font-weight:bold}
nav.main{margin-left:auto;display:flex;gap:4px;align-items:center}
nav.main a{padding:9px 13px;border-radius:6px;color:var(--ink-2);font-size:.925rem;
  font-weight:bold}
nav.main a:hover{background:var(--lslate);color:var(--navy);text-decoration:none}
nav.main a[aria-current=page]{color:var(--navy);background:var(--lslate)}
.btn{display:inline-block;background:var(--navy);color:#fff!important;font-weight:bold;
  padding:13px 22px;border-radius:7px;font-size:.95rem;border:2px solid var(--navy);
  text-align:center}
.btn:hover{background:var(--navy-d);border-color:var(--navy-d);text-decoration:none}
.btn.ghost{background:transparent;color:var(--navy)!important;border-color:var(--line)}
.btn.ghost:hover{background:var(--lslate);border-color:var(--navy)}
.btn.on-dark{background:#fff;color:var(--navy)!important;border-color:#fff}
.btn.on-dark:hover{background:var(--lslate);border-color:var(--lslate)}
.btn.ghost.on-dark{background:transparent;color:#fff!important;
  border-color:rgba(255,255,255,.45)}
.btn.ghost.on-dark:hover{background:rgba(255,255,255,.1);border-color:#fff}
nav.main .btn{padding:10px 17px}
.menu-btn{display:none;margin-left:auto;background:none;border:2px solid var(--line);
  border-radius:6px;padding:9px 13px;font:bold .9rem var(--sans);color:var(--navy)}
@media(max-width:900px){
  nav.main{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;
    border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;
    padding:12px var(--gut) 20px;gap:2px}
  nav.main.open{display:flex}
  nav.main a{padding:13px 10px;font-size:1.02rem}
  nav.main .btn{margin-top:10px;padding:14px}
  .menu-btn{display:block}
}

/* ---------- sections ---------- */
section{padding:clamp(56px,8vw,104px) 0}
section.tight{padding:clamp(40px,5vw,64px) 0}
.dark{background:var(--navy);color:#EAF1F8}
.dark h1,.dark h2,.dark h3,.dark h4{color:#fff}
.dark p{color:#C6D6E8}
.dark .lede{color:#D3E1F0}
.tintbg{background:var(--lslate)}
.rule{border:0;border-top:1px solid var(--line);margin:0}

/* ---------- asymmetric grids: break the 3-card monotony ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.32fr);
  gap:clamp(28px,5vw,64px);align-items:start}
.split.flip{grid-template-columns:minmax(0,1.32fr) minmax(0,1fr)}
.split.even{grid-template-columns:repeat(2,minmax(0,1fr))}
.split.hero{grid-template-columns:minmax(0,1.14fr) minmax(0,1fr)}
@media(max-width:860px){.split,.split.flip,.split.even,.split.hero{grid-template-columns:1fr}}
.cards{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(236px,1fr))}
@media(min-width:900px){.cards.three{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{border:1px solid var(--line);border-radius:11px;padding:24px 22px;
  background:#fff}
.card.on-dark{background:rgba(255,255,255,.055);border-color:rgba(255,255,255,.17)}
.card h3{margin-bottom:9px}
.card p:last-child{margin-bottom:0}
.card .num{font-family:var(--mono);font-size:.72rem;color:var(--blue);
  letter-spacing:.13em;font-weight:bold;display:block;margin-bottom:11px}

/* ---------- stat band: real measured numbers ---------- */
.stats{display:grid;gap:1px;background:rgba(255,255,255,.17);
  grid-template-columns:repeat(auto-fit,minmax(168px,1fr));
  border:1px solid rgba(255,255,255,.17);border-radius:11px;overflow:hidden}
.stat{background:var(--navy);padding:24px 20px}
.stat b{display:block;font-family:var(--mono);font-size:clamp(1.9rem,4.2vw,2.5rem);
  color:#fff;line-height:1;letter-spacing:-.035em;margin-bottom:9px;font-weight:bold}
.stat span{display:block;font-size:.83rem;color:#A9C4DE;line-height:1.45}

/* ---------- ordered process, vertical rail ---------- */
ol.rail{list-style:none;margin:0;padding:0;counter-reset:s}
ol.rail li{counter-increment:s;position:relative;padding:0 0 28px 62px;
  border-left:2px solid var(--line);margin-left:19px}
ol.rail li:last-child{border-left-color:transparent;padding-bottom:0}
ol.rail li::before{content:counter(s);position:absolute;left:-21px;top:-4px;
  width:40px;height:40px;border-radius:50%;background:var(--navy);color:#fff;
  font:bold .95rem/40px var(--mono);text-align:center;letter-spacing:0}
ol.rail h3{margin-bottom:6px}
ol.rail p{margin-bottom:0;color:var(--ink-2)}

/* ---------- spec table: reads as engineering ---------- */
table.spec{width:100%;border-collapse:collapse;font-size:.93rem;margin:6px 0 0}
table.spec th{text-align:left;background:var(--navy);color:#fff;padding:11px 14px;
  font-size:.76rem;letter-spacing:.09em;text-transform:uppercase}
table.spec td{padding:11px 14px;border-bottom:1px solid var(--line);
  vertical-align:top}
table.spec tr:last-child td{border-bottom:0}
table.spec td:first-child{font-weight:bold;color:var(--navy);width:33%}
table.spec td.m{font-family:var(--mono);font-size:.88rem}
.tscroll{overflow-x:auto;border:1px solid var(--line);border-radius:11px}

/* ---------- figure + photo slot ---------- */
figure{margin:0}
figure.diagram{border:1px solid var(--line);border-radius:11px;overflow:hidden;
  background:#fff}
figure.diagram svg{width:100%;display:block}
figure figcaption{font-size:.83rem;color:var(--slate);padding:13px 17px;
  border-top:1px solid var(--line);background:var(--lslate);line-height:1.5}
figure.diagram.on-dark{border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.05)}
figure.diagram.on-dark figcaption{background:rgba(255,255,255,.06);
  border-top-color:rgba(255,255,255,.14);color:#A9C4DE}
.photo-slot{aspect-ratio:16/10;border:2px dashed var(--line);border-radius:11px;
  background:var(--lslate);display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:7px;padding:22px;text-align:center;color:var(--slate)}
.photo-slot .mono{font-size:.76rem;letter-spacing:.06em;text-transform:uppercase}

/* ---------- misc ---------- */
ul.ticks{list-style:none;margin:0;padding:0}
ul.ticks li{position:relative;padding:0 0 11px 27px;color:var(--ink-2)}
ul.ticks li::before{content:"";position:absolute;left:2px;top:.55em;width:9px;
  height:9px;border-radius:2px;background:var(--blue)}
ul.ticks.on-dark li{color:#C6D6E8}
ul.ticks.on-dark li::before{background:var(--blue-l)}
.pair{display:flex;gap:13px;flex-wrap:wrap;margin-top:28px}
.note{border-left:3px solid var(--amber);background:#FDF8F1;padding:15px 19px;
  border-radius:0 8px 8px 0;font-size:.93rem;color:var(--ink-2)}
.note:last-child{margin-bottom:0}
.crumb{font-size:.83rem;color:var(--slate);margin:0 0 22px}
.crumb a{color:var(--slate)}
.tag{display:inline-block;font-family:var(--mono);font-size:.68rem;font-weight:bold;
  letter-spacing:.12em;text-transform:uppercase;padding:5px 9px;border-radius:4px;
  background:var(--lslate);color:var(--navy);border:1px solid var(--line)}
.tag.on-dark{background:rgba(255,255,255,.1);color:#CFE0F1;
  border-color:rgba(255,255,255,.2)}

/* ---------- footer ---------- */
footer.site{background:var(--navy-d);color:#A9C4DE;padding:56px 0 34px;
  font-size:.9rem}
footer.site h4{color:#fff;font-size:.74rem;letter-spacing:.15em;
  text-transform:uppercase;margin-bottom:15px;font-family:var(--mono)}
footer.site a{color:#CFE0F1;display:block;padding:4px 0}
.fgrid{display:grid;gap:36px;grid-template-columns:1.6fr 1fr 1fr 1fr}
@media(max-width:800px){.fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.fgrid{grid-template-columns:1fr}}
.legal{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:22px;
  font-size:.8rem;color:#7E9BB8;line-height:1.6}
@media print{header.site,nav.main,.menu-btn{display:none}}