:root{
  --bg:#f8fafc;
  --paper:#ffffff;
  --ink:#0f172a;
  --muted:#526174;
  --line:#d8e0ea;
  --blue:#1d4ed8;
  --teal:#0f766e;
  --blue-soft:#dbeafe;
  --teal-soft:#ccfbf1;
  --shadow:0 18px 55px rgba(15,23,42,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(90deg,#eef4fb 0,#f8fafc 26%,#fff 100%);color:var(--ink);font-family:Inter,"Source Sans 3",system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.64}
a{color:var(--blue)}
a.naked{word-break:break-all;color:#075985}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
.top{position:fixed;inset:0 auto 0 0;width:252px;background:#0f172a;color:#e5edf6;border-right:1px solid rgba(255,255,255,.14);z-index:8}
.nav{display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;min-height:100vh;padding:28px 22px}
.brand{font-weight:800;font-size:1.08rem;line-height:1.22;color:#fff;margin-bottom:28px}
.brand:after{content:"A1 fieldbook";display:block;margin-top:10px;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:#99f6e4}
.nav nav{display:flex;flex-direction:column;gap:10px}
.nav a{display:block;text-decoration:none;color:#cbd5e1;padding:10px 12px;border:1px solid rgba(255,255,255,.11);border-radius:8px;background:rgba(255,255,255,.035)}
.nav a:hover{background:rgba(29,78,216,.28);color:#fff}
main,.footer{margin-left:252px}
.hero{padding:56px 0 32px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;align-items:stretch}
.eyebrow{color:var(--teal);text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:800}
.hero h1{font-size:3.35rem;line-height:1.02;margin:12px 0 18px;letter-spacing:0;color:#111827;max-width:11ch}
.lead{font-size:1.12rem;color:#334155;max-width:68ch}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:22px;box-shadow:var(--shadow)}
.media-card{min-height:440px;position:sticky;top:28px;overflow:hidden;background:#e2e8f0}
.media-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.88) contrast(1.03)}
.media-card:after{content:"touchscreen kiosk fieldbook";position:absolute;left:18px;right:18px;bottom:18px;padding:12px 14px;background:rgba(15,23,42,.86);color:#fff;border-radius:8px;font-weight:800}
.section{padding:30px 0}
.section h2{font-size:1.72rem;line-height:1.16;margin:0 0 12px;color:#172033}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.grid3,.decision-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.grid3 .card:first-child{grid-column:span 2}
.card{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:20px;box-shadow:0 10px 32px rgba(15,23,42,.08)}
.card h3{margin:0 0 10px;color:#0f172a}
.small{font-size:.92rem;color:var(--muted)}
.callout{border:1px solid #99f6e4;border-left:5px solid var(--teal);padding:16px 18px;background:linear-gradient(90deg,var(--teal-soft),#fff);border-radius:8px}
.video{aspect-ratio:16/9;width:100%;border:0;border-radius:8px;background:#000}
.inline-img{width:100%;max-height:360px;object-fit:cover;border-radius:8px;border:1px solid var(--line);margin:10px 0 14px}
.checklist li,.questions li{margin:0 0 10px}
.cloud-dock .callout{margin-bottom:18px}
.dock-grid{display:grid;grid-template-columns:1fr;gap:18px}
.dock-panel h3{margin:0 0 12px;color:#0f172a}
.embed-frame{width:100%;min-height:420px;border:1px solid var(--line);border-radius:8px;background:#fff}
.route-link-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.route-link-grid a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:8px;background:var(--blue-soft);text-decoration:none;color:#1e3a8a;font-weight:700}
.footer{padding:28px 0 44px;color:var(--muted);border-top:1px solid var(--line)}
@media(max-width:980px){
  .top{position:static;width:auto}
  .nav{min-height:0;padding:18px 20px}
  .nav nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  main,.footer{margin-left:0}
  .hero-grid,.grid2,.grid3,.decision-grid{grid-template-columns:1fr}
  .grid3 .card:first-child{grid-column:auto}
  .hero h1{font-size:2.55rem;max-width:none}
  .media-card{position:relative;top:auto;min-height:300px}
  .route-link-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .wrap{padding:0 18px}
  .nav nav,.route-link-grid{grid-template-columns:1fr}
  .hero{padding-top:34px}
}