@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;700&family=IBM+Plex+Sans:wght@400;500&family=IBM+Plex+Mono:wght@500&display=swap');

:root{
  --navy:#0A1420;
  --navy-2:#101E2E;
  --cream:#F3EEDD;
  --teal:#3A9188;
  --brass:#C9A227;
  --muted:#93A0AC;
  --border:rgba(243,238,221,0.14);
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--navy);color:var(--cream);font-family:'IBM Plex Sans',sans-serif;line-height:1.6;}
h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;font-weight:700;margin:0 0 0.5rem;}
.eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:0.08em;color:var(--brass);font-weight:500;margin-bottom:0.5rem;}

#gate{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:var(--navy);z-index:10;}
.gate-box{width:min(90vw,380px);text-align:center;border:1px solid var(--border);border-radius:12px;padding:2.5rem 2rem;background:var(--navy-2);}
.gate-eyebrow{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.08em;color:var(--brass);margin-bottom:0.75rem;}
.gate-box h1{font-size:28px;margin-bottom:0.5rem;}
.gate-sub{color:var(--muted);font-size:14px;margin-bottom:1.5rem;}
#gate-pass{width:100%;padding:0.75rem 1rem;border-radius:8px;border:1px solid var(--border);background:var(--navy);color:var(--cream);font-size:15px;margin-bottom:0.75rem;}
#gate-submit{width:100%;padding:0.75rem 1rem;border-radius:8px;border:none;background:var(--teal);color:var(--navy);font-weight:500;font-size:15px;cursor:pointer;}
#gate-submit:hover{opacity:0.9;}
#gate-error{color:#E2857A;font-size:13px;margin-top:0.75rem;display:none;}

.topbar{display:flex;justify-content:space-between;align-items:center;padding:1.25rem 2rem;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:8px;}
.brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:15px;}
.brand-sep{color:var(--brass);}
.doc-ref{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted);}

.hero{padding:3rem 2rem 2rem;max-width:820px;}
.hero h1{font-size:32px;line-height:1.25;}
.hero-copy{color:var(--muted);font-size:16px;max-width:680px;}
.hero-copy strong{color:var(--cream);}

.panel{padding:2.5rem 2rem;border-top:1px solid var(--border);max-width:1000px;}
.panel h2{font-size:22px;}
.panel-sub{color:var(--muted);font-size:14px;max-width:720px;margin-bottom:1rem;}
.panel-sub strong{color:var(--cream);}

.badge{display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:0.05em;padding:3px 8px;border-radius:4px;margin-left:6px;vertical-align:middle;}
.badge-model{background:rgba(201,162,39,0.18);color:var(--brass);}

/* Stepper (deployment sequence) */
.stepper{display:flex;gap:24px;align-items:stretch;margin-top:1rem;flex-wrap:wrap;}
.stepper-nav{display:flex;flex-direction:column;gap:8px;min-width:220px;flex:0 0 240px;}
.step-btn{display:flex;align-items:center;gap:10px;text-align:left;background:var(--navy-2);border:1px solid var(--border);border-radius:8px;padding:10px 14px;color:var(--muted);font-size:13.5px;cursor:pointer;font-family:'IBM Plex Sans',sans-serif;}
.step-btn:hover{background:rgba(58,145,136,0.08);}
.step-btn.active{color:var(--cream);border-color:var(--teal);background:rgba(58,145,136,0.14);}
.step-btn-num{font-family:'Space Grotesk',sans-serif;font-weight:700;color:var(--teal);font-size:14px;min-width:16px;}
.stepper-text{border:1px solid var(--border);border-radius:10px;padding:1.25rem;background:var(--navy-2);flex:1;min-width:260px;}
.step-panel{display:none;}
.step-panel.active{display:block;}
.step-panel h3{font-size:16px;margin-bottom:0.5rem;}
.step-panel p{font-size:13.5px;color:var(--muted);margin:0;}
.step-panel p strong{color:var(--cream);}

.orbit3d-note{font-size:12px;color:var(--muted);margin-top:1rem;border-left:2px solid var(--border);padding-left:10px;}

/* Dual-path backhaul cards */
.backhaul-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:1rem;}
.backhaul-card{border:1px solid var(--border);border-radius:10px;padding:1.25rem;background:var(--navy-2);}
.backhaul-label{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:0.05em;color:var(--brass);margin-bottom:0.4rem;}
.backhaul-card h4{font-size:16px;margin-bottom:0.5rem;}
.backhaul-card p{font-size:13px;color:var(--muted);margin:0 0 0.75rem;}
.backhaul-link{color:var(--teal);font-size:12.5px;text-decoration:none;font-family:'IBM Plex Mono',monospace;}
.backhaul-link:hover{text-decoration:underline;}

/* LiFi radar demo */
.lifi-demo{display:flex;gap:24px;align-items:flex-start;flex-wrap:wrap;margin-top:1rem;}
.lifi-radar-wrap{position:relative;flex:1;min-width:320px;max-width:420px;border:1px solid var(--border);border-radius:10px;background:var(--navy-2);padding:0.75rem;}
.lifi-radar-svg{width:100%;height:auto;cursor:crosshair;}
.lifi-ring{fill:none;stroke:var(--border);stroke-width:1.5;stroke-dasharray:4 4;}
.lifi-ring-label{fill:var(--muted);font-family:'IBM Plex Mono',monospace;font-size:10px;}
.lifi-icon-label{fill:var(--muted);font-family:'IBM Plex Mono',monospace;font-size:9px;}
.lifi-tooltip{position:fixed;display:none;background:var(--navy-2);border:1px solid var(--teal);border-radius:8px;padding:8px 12px;font-size:12px;line-height:1.5;color:var(--cream);pointer-events:none;z-index:20;max-width:220px;font-family:'IBM Plex Mono',monospace;}
.lifi-controls{flex:1;min-width:260px;}
.lifi-controls label{font-size:13px;color:var(--cream);display:block;margin-bottom:0.5rem;}
.lifi-controls select{width:100%;background:var(--navy);border:1px solid var(--border);color:var(--cream);border-radius:6px;padding:8px 10px;font-size:13px;margin-bottom:1rem;font-family:'IBM Plex Sans',sans-serif;}
.lifi-hint{font-size:12.5px;color:var(--muted);margin-bottom:1rem;}
.lifi-caveat{font-size:12px;color:var(--muted);border-left:2px solid var(--brass);padding-left:10px;}

.claims-panel{background:var(--navy-2);}
.claims-list{display:flex;flex-direction:column;gap:10px;margin-top:0.5rem;}
.claim-item{border:1px solid var(--border);border-radius:8px;padding:1rem;background:var(--navy);}
.claim-item h4{font-size:14px;margin:0 0 4px;color:var(--brass);}
.claim-item p{font-size:13.5px;color:var(--muted);margin:0;}
.claims-footnote{font-size:12px;color:var(--muted);margin-top:1.25rem;}

.footer{padding:2rem;text-align:center;font-size:11.5px;color:var(--muted);border-top:1px solid var(--border);}

@media (max-width:760px){
  .hero,.panel{padding:2rem 1.25rem;}
  .topbar{padding:1rem 1.25rem;}
  .stepper-nav{flex-direction:row;flex-wrap:wrap;flex:1 1 auto;}
  .step-btn{flex:1;min-width:130px;justify-content:center;}
}