:root{
  --navy:#071a34; --navy2:#102d54; --cyan:#20b7c6; --cyan2:#8be0e8;
  --orange:#f4a62a; --purple:#7657d6; --green:#24a36a; --red:#dc4c64;
  --bg:#edf3f8; --ink:#15243a; --muted:#68788f; --line:#d9e3ed;
  --shadow:0 18px 60px rgba(3,18,39,.22);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:
radial-gradient(circle at 10% 0%,#174a70 0,transparent 35%),
linear-gradient(150deg,#041225,#0b294d 55%,#06182e);color:#fff;min-height:100vh}
a{text-decoration:none;color:inherit}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
padding:12px clamp(18px,4vw,58px);background:rgba(4,18,37,.88);backdrop-filter:blur(18px);
border-bottom:1px solid rgba(255,255,255,.12)}
.brand{display:flex;align-items:center;gap:14px}
.brand img{height:50px;max-width:190px;object-fit:contain}
.brand-copy b{display:block;font-size:16px}
.brand-copy span{font-size:12px;color:#a8bdd1}
.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid rgba(255,255,255,.18);
border-radius:12px;padding:10px 15px;background:rgba(255,255,255,.08);color:#fff;font-weight:800;cursor:pointer}
.btn:hover{background:rgba(32,183,198,.22);border-color:rgba(139,224,232,.55)}
.btn.primary{background:linear-gradient(135deg,var(--cyan),#118b9c);border-color:transparent}
.hero{max-width:1260px;margin:auto;padding:70px 24px 42px;display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(43px,6vw,78px);line-height:.98;margin:0 0 22px;letter-spacing:-.045em}
.hero h1 em{font-style:normal;color:var(--cyan2)}
.hero p{font-size:20px;line-height:1.55;color:#cad8e5;max-width:760px}
.hero-card{background:linear-gradient(145deg,rgba(255,255,255,.13),rgba(255,255,255,.05));border:1px solid rgba(255,255,255,.15);
border-radius:28px;padding:28px;box-shadow:var(--shadow)}
.hero-card .metric{display:flex;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.12);padding:15px 0}
.hero-card .metric:last-child{border:0}
.metric b{font-size:28px;color:var(--orange)}
.metric span{color:#c7d5e2;text-align:right}
.section{max-width:1260px;margin:auto;padding:36px 24px 60px}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}
.section-title h2{font-size:36px;margin:0}
.section-title p{margin:0;color:#b9c9d8}
.flow-grid,.screen-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.flow-card,.screen-card{background:#fff;color:var(--ink);border-radius:22px;overflow:hidden;box-shadow:0 14px 40px rgba(0,0,0,.16);
border:1px solid rgba(255,255,255,.2);transition:.2s transform,.2s box-shadow}
.flow-card:hover,.screen-card:hover{transform:translateY(-4px);box-shadow:0 22px 55px rgba(0,0,0,.24)}
.flow-card{padding:24px}
.flow-card h3{margin:0 0 10px;font-size:22px;color:var(--navy)}
.flow-card p{color:var(--muted);line-height:1.5}
.flow-steps{display:flex;flex-wrap:wrap;gap:7px}
.flow-steps a{background:#eef7f9;border:1px solid #d5edf0;color:#117483;padding:7px 9px;border-radius:9px;font-size:12px;font-weight:800}
.screen-card img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;background:#dce6ef}
.screen-info{padding:17px}
.screen-number{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:#148596;font-weight:900}
.screen-info h3{margin:7px 0 8px;font-size:20px}
.screen-info p{margin:0;color:var(--muted);line-height:1.4;font-size:14px}
.tag{display:inline-flex;margin-top:12px;padding:5px 9px;border-radius:99px;background:#ecf6f8;color:#117483;font-size:12px;font-weight:900}
.group-heading{grid-column:1/-1;margin:30px 0 0;font-size:26px;color:#fff}
.footer{text-align:center;padding:34px;color:#9fb2c6;border-top:1px solid rgba(255,255,255,.1)}
/* screen viewer */
.viewer-body{overflow-x:hidden}
.viewer-header{position:fixed;top:0;left:0;right:0;z-index:50}
.viewer-main{min-height:100vh;padding:92px 20px 108px;display:flex;align-items:center;justify-content:center}
.screen-shell{position:relative;width:min(1600px,calc(100vw - 40px));aspect-ratio:16/9;background:#020a15;border-radius:22px;overflow:hidden;
box-shadow:0 26px 90px rgba(0,0,0,.48);border:1px solid rgba(255,255,255,.18)}
.screen-shell img{display:block;width:100%;height:100%;object-fit:contain}
.screen-caption{position:absolute;left:20px;bottom:20px;background:rgba(4,18,37,.88);backdrop-filter:blur(12px);max-width:540px;
padding:13px 17px;border-radius:14px;border:1px solid rgba(255,255,255,.15);opacity:.18;transition:.2s}
.screen-shell:hover .screen-caption{opacity:1}
.screen-caption b{font-size:16px}
.screen-caption span{display:block;color:#b8cad9;font-size:13px;margin-top:3px}
.viewer-nav{position:fixed;z-index:55;bottom:18px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:8px;
background:rgba(4,18,37,.9);backdrop-filter:blur(18px);padding:9px;border-radius:17px;border:1px solid rgba(255,255,255,.15);box-shadow:var(--shadow)}
.viewer-nav a,.viewer-nav button{height:44px;border:0;border-radius:11px;background:rgba(255,255,255,.09);color:#fff;padding:0 15px;
font-weight:850;display:flex;align-items:center;cursor:pointer}
.viewer-nav a:hover,.viewer-nav button:hover{background:rgba(32,183,198,.28)}
.interactions-toggle{position:fixed;right:20px;bottom:22px;z-index:60}
.drawer{position:fixed;right:0;top:75px;bottom:0;width:min(390px,92vw);z-index:58;background:#fff;color:var(--ink);padding:24px;
box-shadow:-22px 0 65px rgba(0,0,0,.28);transform:translateX(105%);transition:.25s;overflow:auto}
.drawer.open{transform:translateX(0)}
.drawer h2{margin:0;color:var(--navy)}
.drawer p{color:var(--muted);line-height:1.5}
.action-list{display:grid;gap:10px;margin-top:20px}
.action-list a{padding:14px;border:1px solid var(--line);border-radius:13px;font-weight:850;color:var(--navy);background:#f5f8fb}
.action-list a:hover{border-color:var(--cyan);background:#eaf8fa}
.keyboard{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.keyboard kbd{background:#eaf0f5;border-radius:6px;padding:4px 7px;color:var(--navy);font-weight:900}
.prototype-note{max-width:1000px;margin:0 auto 45px;padding:18px 22px;border-radius:16px;background:rgba(255,255,255,.09);
border:1px solid rgba(255,255,255,.13);color:#cbd9e6}
@media(max-width:960px){
 .hero{grid-template-columns:1fr}.flow-grid,.screen-grid{grid-template-columns:1fr 1fr}
 .brand-copy{display:none}.viewer-main{padding-left:8px;padding-right:8px}
 .screen-shell{width:calc(100vw - 16px);border-radius:12px}.screen-caption{display:none}
}
@media(max-width:620px){
 .flow-grid,.screen-grid{grid-template-columns:1fr}.hero{padding-top:45px}
 .header-actions .optional{display:none}.viewer-nav{bottom:8px;width:calc(100vw - 16px);justify-content:center}
 .viewer-nav a,.viewer-nav button{padding:0 11px;font-size:13px}.interactions-toggle{right:9px;bottom:66px}
}