:root{
  --bg:#f3f5f7;
  --ink:#111827;
  --muted:#5b6472;
  --panel:#ffffff;
  --dark:#111827;
  --dark2:#0b1220;
  --line:#d9dee5;
  --soft:#e9edf2;
  --accent:#d7dbe2;
  --radius:24px;
  --shadow:0 18px 50px rgba(15,23,42,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:Arial,Helvetica,sans-serif;
}
button{font:inherit}
.topbar{
  position:sticky;top:0;z-index:100;
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  padding:14px 26px;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:blur(10px)
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  background:#111827;color:#fff;font-weight:800;font-size:12px;letter-spacing:.08em
}
.brand strong{display:block;font-size:15px}
.brand span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.trust{font-size:13px;font-weight:700;white-space:nowrap}
.trust span{opacity:.45;margin:0 5px}

#tourRoot{width:min(1280px,calc(100% - 28px));margin:18px auto 260px}
.tour-screen{
  min-height:650px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:54px;margin:20px 0;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  display:flex;flex-direction:column;justify-content:center
}
.tour-screen.dark{background:linear-gradient(135deg,var(--dark),var(--dark2));color:#fff;border-color:#263041}
.tour-screen.active-step{outline:5px solid rgba(17,24,39,.15);outline-offset:4px}
.dark.active-step{outline-color:rgba(255,255,255,.22)}
.eyebrow{font-size:13px;letter-spacing:.15em;font-weight:800;color:#667085;margin-bottom:13px}
.dark .eyebrow{color:#b8c0cc}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(48px,7vw,86px);line-height:.98;letter-spacing:-.05em;max-width:920px;margin-bottom:24px}
h2{font-size:clamp(38px,5vw,66px);line-height:1.03;letter-spacing:-.04em;max-width:1000px;margin-bottom:30px}
h3{font-size:22px;margin-bottom:10px}
p{line-height:1.55}
.lead{font-size:22px;max-width:850px;color:var(--muted)}
.dark .lead{color:#d1d5db}
.hero{background:radial-gradient(circle at 80% 20%,#e7eaf0 0,transparent 33%),#fff}
.hero-actions{display:flex;gap:12px;margin:26px 0 14px}
.primary,.secondary{
  border-radius:999px;padding:14px 20px;border:1px solid var(--ink);cursor:pointer;font-weight:800
}
.primary{background:var(--ink);color:#fff}.secondary{background:#fff;color:var(--ink)}
.hero-note{font-size:14px;color:var(--muted)}
.section-head{display:flex;justify-content:space-between;gap:28px;align-items:flex-start}
.badge,.demo-pill{
  border:1px solid currentColor;border-radius:999px;padding:10px 13px;
  font-size:12px;font-weight:800;letter-spacing:.08em;white-space:nowrap
}
.feature-grid{display:grid;gap:18px}.feature-grid.three{grid-template-columns:repeat(3,1fr)}
.feature-grid.four{grid-template-columns:repeat(4,1fr)}
.feature{
  border:1px solid var(--line);border-radius:18px;padding:24px;background:#fff;color:var(--ink)
}
.dark .feature{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);color:#fff}
.feature p{color:var(--muted);margin-bottom:0}.dark .feature p{color:#c8d0da}
.num{display:block;font-size:12px;font-weight:800;color:#8a94a3;margin-bottom:28px}
.icon-card .icon{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  background:#111827;color:#fff;font-weight:800;margin-bottom:24px
}

.museum-shell{padding:0;justify-content:flex-start}
.mock-nav{
  min-height:70px;padding:0 28px;display:flex;align-items:center;gap:24px;
  border-bottom:1px solid var(--line);background:#111827;color:#fff
}
.mock-nav strong{margin-right:auto}.mock-nav span{font-size:13px;color:#d5d9df}
.mock-grid{display:grid;grid-template-columns:240px 1fr;min-height:580px}
.side{background:#eef1f4;padding:28px 18px;border-right:1px solid var(--line)}
.side-title{font-weight:800;font-size:13px;margin-bottom:18px}
.side-item{padding:12px 14px;border-radius:10px;font-size:14px;margin-bottom:6px}
.side-item.active{background:#111827;color:#fff;font-weight:700}
.workspace{padding:48px}
.topic-row{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 34px}
.topic-row span{padding:10px 13px;border-radius:999px;background:#edf0f3;font-weight:700;font-size:13px}
.callout{border-left:5px solid #111827;padding:16px 20px;background:#f4f6f8;border-radius:0 14px 14px 0}
.callout p{margin-bottom:0;color:var(--muted)}

.governance-flow,.pathway{
  display:grid;grid-template-columns:1fr auto 1.2fr auto 1fr;gap:18px;align-items:center;margin-top:20px
}
.governance-flow>div:not(.arrow),.pathway>div:not(.arrow){
  border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:26px;background:rgba(255,255,255,.06)
}
.governance-flow strong,.pathway strong{display:block;font-size:21px;margin-bottom:8px}
.governance-flow span,.pathway span{font-size:14px;color:#c8d0da}
.governance-flow .gate{background:#fff!important;color:#111827!important}
.governance-flow .gate span{color:#4b5563}
.arrow{text-align:center;font-size:34px}
.principle{
  margin-top:30px;padding:18px 22px;border-radius:16px;background:#fff;color:#111827;
  font-weight:800;font-size:22px;text-align:center
}
.admin-layout{display:grid;grid-template-columns:220px 1fr;gap:18px}
.admin-menu{background:#eef1f4;border-radius:18px;padding:12px;display:flex;flex-direction:column;gap:8px}
.admin-menu button{border:0;background:transparent;padding:13px 14px;text-align:left;border-radius:10px}
.admin-menu button.active{background:#111827;color:#fff;font-weight:700}
.admin-panel{border:1px solid var(--line);border-radius:18px;padding:28px}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0}
.stat-grid div{background:#eef1f4;border-radius:14px;padding:22px}
.stat-grid strong{display:block;font-size:34px}.stat-grid span{font-size:13px;color:var(--muted)}
.disabled-action{margin-top:10px;padding:11px 14px;border-radius:10px;border:1px solid var(--line);background:#eee;color:#777}
.evidence-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:28px;align-items:center}
.certificate{
  min-height:350px;border:8px double #111827;border-radius:8px;padding:34px;text-align:center;
  display:flex;flex-direction:column;justify-content:center;background:#fcfcfb
}
.cert-top{font-size:12px;letter-spacing:.16em;font-weight:800}
.cert-seal{width:68px;height:68px;border:2px solid #111827;border-radius:50%;display:grid;place-items:center;margin:24px auto;font-size:30px}
.certificate small{color:var(--muted)}
.evidence-list{display:grid;gap:14px}
.evidence-list div{border:1px solid var(--line);border-radius:14px;padding:20px}
.evidence-list strong,.evidence-list span{display:block}.evidence-list span{color:var(--muted);margin-top:6px}
.deployment-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.nato-note{margin-top:24px;border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:18px}
.nato-note strong,.nato-note span{display:block}.nato-note span{margin-top:6px;color:#c8d0da;font-size:13px}
.critical{background:linear-gradient(135deg,#fff,#eceff3)}
.verb-row{display:flex;flex-wrap:wrap;gap:10px;margin:6px 0 26px}
.verb-row span{font-size:clamp(18px,2vw,28px);font-weight:900;border:2px solid #111827;border-radius:999px;padding:12px 16px}
.question-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.question-grid div{border:1px solid var(--line);border-radius:18px;padding:28px;min-height:180px}
.question-grid span{display:block;font-size:12px;font-weight:800;color:#8b95a5;margin-bottom:34px}
.question-grid strong{font-size:22px;line-height:1.25}
.ai-basics{background:linear-gradient(135deg,#f9fafb,#e7ebf0)}
.center-note{text-align:center;margin-top:26px;color:#d1d5db}
.cta{text-align:center;align-items:center}
.cta h2{max-width:950px}
.cta-brand{font-size:28px;font-weight:900;margin-top:10px}
.cta-url{font-size:20px;margin-top:10px}
.cta-line{margin-top:28px;color:var(--muted);font-weight:700}
.persistent-mark{
  position:fixed;right:16px;top:78px;z-index:150;
  background:rgba(17,24,39,.88);color:#fff;border-radius:999px;
  padding:8px 11px;font-size:11px;font-weight:800;letter-spacing:.03em
}

.tour-hud{
  position:fixed;z-index:1000;left:4vw;right:4vw;bottom:3vh;
  background:rgba(5,9,16,.95);color:#fff;border:1px solid rgba(255,255,255,.2);
  border-radius:18px;padding:18px 20px;box-shadow:0 20px 80px rgba(0,0,0,.42)
}
.hud-caption{font-size:clamp(20px,2vw,31px);line-height:1.26;font-weight:750;max-width:1500px;margin:auto}
.hud-bottom{display:flex;align-items:center;gap:12px;margin-top:12px}
.hud-bottom>span{font-size:12px;white-space:nowrap;color:#cfd5dd}
.progress{height:5px;background:rgba(255,255,255,.2);border-radius:999px;flex:1;overflow:hidden}
.progress span{display:block;width:0;height:100%;background:#fff}
.hud-bottom button{
  border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;
  border-radius:999px;padding:6px 10px;cursor:pointer;font-size:12px
}
body.tour-running{padding-bottom:170px}

@media(max-width:900px){
  .topbar{padding:12px 14px}.trust{display:none}
  #tourRoot{width:min(100% - 16px,1280px)}
  .tour-screen{padding:30px;min-height:620px}
  .feature-grid.three,.feature-grid.four,.deployment-grid,.question-grid,.evidence-wrap{grid-template-columns:1fr}
  .mock-grid{grid-template-columns:1fr}.side{display:none}
  .workspace{padding:30px}
  .governance-flow,.pathway{grid-template-columns:1fr}.arrow{transform:rotate(90deg)}
  .admin-layout{grid-template-columns:1fr}.admin-menu{display:grid;grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:1fr}
}