:root{--navy:#14213d;--navy-2:#22335a;--amber:#e5a823;--amber-soft:#fff4d6;--ink:#1b1f29;--muted:#5a6275;--bg:#f5f6fa;--card:#fff;--line:#dfe3ec}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:19px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
.wrap{max-width:740px;margin:0 auto;padding:0 22px}
.top{background:var(--navy);color:#fff}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:16px;padding-bottom:16px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font:700 20px/1.1 Rockwell,"Roboto Slab","Zilla Slab","Courier New",serif;letter-spacing:.01em}
.logo svg{width:28px;height:28px}
.top nav a{color:#cfd6e6;text-decoration:none;font-size:15px}
.top nav a:hover{color:#fff}
main.wrap{padding-top:40px;padding-bottom:48px}
h1,h2,h3{font-family:Rockwell,"Roboto Slab","Zilla Slab","Courier New",serif;color:var(--navy);line-height:1.2}
h1{font-size:clamp(30px,5vw,42px);margin:0 0 14px;letter-spacing:-.01em}
h2{font-size:clamp(23px,3.4vw,28px);margin:42px 0 12px}
p{margin:0 0 18px}
ul,ol{padding-left:24px;margin:0 0 20px}li{margin:0 0 8px}
a{color:#1f4fb5;text-underline-offset:3px;text-decoration-thickness:1.5px}
a:hover{color:var(--navy)}
.eyebrow{display:inline-block;font:700 13px/1 -apple-system,"Segoe UI",sans-serif;text-transform:uppercase;letter-spacing:.1em;color:var(--navy);background:var(--amber);padding:6px 10px;border-radius:4px;margin-bottom:16px}
.lede{font-size:21px;color:#333a4a}
.foot{border-top:4px solid var(--amber);background:var(--navy);color:#cfd6e6;font-size:15px;line-height:1.55}
.foot .wrap{padding-top:22px;padding-bottom:30px}
.foot a{color:#fff}
.back{display:inline-block;margin-top:12px;font-weight:600}
/* hub cards */
.cards{display:grid;gap:18px;margin:28px 0 30px}
.card{display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:start;background:var(--card);border:1px solid var(--line);border-left:6px solid var(--amber);border-radius:10px;padding:20px;text-decoration:none;color:var(--ink);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(20,33,61,.10)}
.card .ic{width:64px;height:64px;border-radius:12px;background:var(--navy);display:grid;place-items:center}
.card .ic svg{width:34px;height:34px;stroke:var(--amber);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.card h2{font-size:22px;margin:0 0 6px}
.card p{margin:0;font-size:17px;color:var(--muted);line-height:1.5}
/* animation frames */
.demo{margin:30px 0 34px;background:var(--navy);color:#fff;border-radius:14px;padding:22px 20px 18px;position:relative}
.demo figcaption{color:#cfd6e6;font-size:15px;line-height:1.5;margin-top:14px}
.demo:has(.replay) figcaption{padding-right:80px}
.demo .replay{position:absolute;right:16px;bottom:16px;background:transparent;border:1px solid #4a5b82;color:#fff;border-radius:999px;font:600 13px -apple-system,"Segoe UI",sans-serif;padding:5px 12px;cursor:pointer}
.demo .replay:hover{border-color:var(--amber);color:var(--amber)}
/* 1: screens */
.screens svg{width:100%;height:auto;display:block}
.screens .lbl{font:600 19px -apple-system,"Segoe UI",sans-serif;fill:#fff}
.screens .sub{font:16px -apple-system,"Segoe UI",sans-serif;fill:#aeb8cf}
.screens .route{fill:none;stroke:var(--amber);stroke-width:3;stroke-dasharray:6 8;stroke-linecap:round;opacity:.25}
.screens.on .route{opacity:1;animation:flow 1.2s linear infinite}
@keyframes flow{to{stroke-dashoffset:-28}}
.screens .hub{transform-box:fill-box;transform-origin:center}
.screens.on .hub{animation:pulse 2.4s ease-out infinite}
@keyframes pulse{0%{transform:scale(1)}15%{transform:scale(1.08)}30%{transform:scale(1)}}
/* 2: chat */
.chat{display:flex;flex-direction:column;gap:10px}
.bub{margin:0;max-width:82%;padding:11px 15px;border-radius:16px;font-size:17px;line-height:1.45;opacity:0;transform:translateY(8px);transition:opacity .45s,transform .45s}
.bub small{display:block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;margin-bottom:2px;opacity:.75}
.bub.them{align-self:flex-start;background:#2c3d66;border-bottom-left-radius:4px}
.bub.you{align-self:flex-end;background:var(--amber);color:var(--navy);border-bottom-right-radius:4px}
.bub.on{opacity:1;transform:none}
/* 3: checklist */
.ready{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}
.ready ul{list-style:none;padding:0;margin:0}
.ready li{display:flex;align-items:center;gap:12px;margin:0 0 10px;font-size:17px;opacity:.45;transition:opacity .35s}
.ready li.on{opacity:1}
.box{width:24px;height:24px;border:2px solid #6b7aa0;border-radius:6px;display:grid;place-items:center;flex:none;transition:background .3s,border-color .3s}
.box svg{width:16px;height:16px;stroke:var(--navy);stroke-width:3;fill:none;stroke-dasharray:24;stroke-dashoffset:24;transition:stroke-dashoffset .35s .1s}
.ready li.on .box{background:var(--amber);border-color:var(--amber)}
.ready li.on .box svg{stroke-dashoffset:0}
.status{font:700 15px/1 -apple-system,"Segoe UI",sans-serif;text-transform:uppercase;letter-spacing:.08em;padding:12px 16px;border-radius:999px;background:#3a4767;color:#cfd6e6;display:flex;align-items:center;gap:9px;white-space:nowrap}
.status i{width:10px;height:10px;border-radius:50%;background:#8a93a8}
.status.live{background:#1f7a4d;color:#fff}.status.live i{background:#7dffb6;box-shadow:0 0 0 0 rgba(125,255,182,.7);animation:live 1.6s infinite}
@keyframes live{70%{box-shadow:0 0 0 8px rgba(125,255,182,0)}100%{box-shadow:0 0 0 0 rgba(125,255,182,0)}}
@media (max-width:640px){
 body{font-size:18px}.wrap{padding:0 18px}.lede{font-size:19px}
 .card{grid-template-columns:48px 1fr;padding:16px;gap:12px}.card .ic{width:48px;height:48px}.card .ic svg{width:26px;height:26px}
 .ready{grid-template-columns:1fr}.status{justify-self:start}
 .bub{max-width:92%}
 .demo{padding:18px 16px 16px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}