:root{
  --blue:#267DF4;
  --blue-dark:#0E4FB3;
  --ink:#07111f;
  --paper:#ffffff;
  --soft:#f4f8ff;
  --blue-soft:#eef6ff;
  --line:#d9e7fb;
  --muted:#65758b;
  --ok:#0f8a4b;
  --bad:#b42318;
  --shadow:0 22px 70px rgba(7,17,31,.10);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 10% 8%, rgba(38,125,244,.16), transparent 33%),
    radial-gradient(circle at 90% 0%, rgba(38,125,244,.10), transparent 30%),
    linear-gradient(180deg,#ffffff 0%,#f5f9ff 100%);
}
body:before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.18;
  background-image:linear-gradient(rgba(38,125,244,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(38,125,244,.16) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom,black,transparent 82%);
}
a{color:var(--blue);font-weight:800;text-decoration:none}
body.has-sticky-footer{padding-bottom:82px}
.top-alert{
  width:100%;
  background:#0f172a;
  color:#fff;
  font-weight:900;
  letter-spacing:.01em;
  text-align:center;
  padding:12px 18px;
  position:relative;
  z-index:3;
  display:none;
}
.top-alert.show{display:block}
.top-alert.ok{background:var(--ok)}
.top-alert.bad,.top-alert.warn{background:var(--bad)}
.shell{width:min(1120px,92vw);margin:0 auto;padding:36px 0 24px;position:relative}
.card{
  background:rgba(255,255,255,.94);
  border:1px solid rgba(217,231,251,.96);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(12px);
}
.hero{padding:38px;position:relative;overflow:hidden}
h1{font-size:clamp(2.2rem,6vw,4.85rem);line-height:.94;margin:0 0 14px;letter-spacing:-.065em;color:#07111f}
h2{font-size:1.22rem;margin:0 0 12px;letter-spacing:-.03em}
p{line-height:1.62;color:#26384f;margin:0 0 18px}.lead{font-size:1.18rem;max-width:820px}
.hero-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.hero-links a{display:inline-flex;align-items:center;border:1px solid #cfe2ff;background:#eef6ff;color:#0E4FB3;border-radius:999px;padding:10px 14px;font-weight:900;box-shadow:none}
.hero-links a:hover{background:#e2f0ff;transform:translateY(-1px)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:18px 0}.panel{padding:26px}.wide{grid-column:1/-1}
.blue-panel{background:rgba(238,246,255,.95);border-color:#cfe2ff;box-shadow:none}
.btn{
  appearance:none;border:0;border-radius:999px;background:var(--blue);color:white;font-weight:900;padding:13px 19px;cursor:pointer;
  box-shadow:0 12px 24px rgba(38,125,244,.28);transition:transform .16s ease,box-shadow .16s ease,opacity .16s ease;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(38,125,244,.36)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.55;cursor:not-allowed}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.read-actions{margin-bottom:16px}
label{display:block;font-weight:900;margin:8px 0;color:#10233d}
input{width:100%;border:1px solid var(--line);border-radius:18px;padding:15px 16px;font-size:1rem;outline:none;background:white;color:var(--ink)}
input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(38,125,244,.12)}
code{background:#eef6ff;color:#0e4fb3;border:1px solid #d8e7ff;border-radius:8px;padding:2px 6px}
.output{margin-top:16px;padding:15px;border-radius:18px;background:#07111f;color:#dce9ff;font-family:"SFMono-Regular",Consolas,monospace;font-size:.92rem;white-space:pre-wrap;overflow-wrap:anywhere;min-height:52px}.output.tall{min-height:120px}.output.ok{background:#063d24;color:#d9ffe9}.output.warn,.output.bad{background:#4b0e0a;color:#ffe2df}
.notes{padding:28px;margin-bottom:8px}.notes ol{margin:0;padding-left:22px;color:#26384f;line-height:1.75}.notes li{margin-bottom:6px}
.site-footer{
  width:min(1120px,92vw);
  margin:0 auto 26px;
  color:var(--muted);
  font-size:.92rem;
  text-align:center;
  position:relative;
}
.site-footer a{color:var(--blue)}
.sub-hero h1{font-size:clamp(2rem,5.2vw,4.2rem)}
.eyebrow{display:inline-block;margin:0 0 12px;color:var(--blue);font-weight:950;letter-spacing:.08em;text-transform:uppercase;font-size:.78rem}
.info-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:18px 0}
.info-card{background:rgba(255,255,255,.95);border:1px solid rgba(217,231,251,.96);border-radius:22px;padding:24px;box-shadow:0 16px 48px rgba(7,17,31,.07)}
.info-card h2{color:#07111f;margin-bottom:8px}.info-card p{margin-bottom:0}
.chip-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:18px 0}
.chip-card{padding:26px;box-shadow:0 16px 48px rgba(7,17,31,.07)}
.chip-card h2{font-size:1.6rem;color:#07111f}
.chip-stat{display:inline-block;background:#eef6ff;border:1px solid #cfe2ff;border-radius:999px;padding:8px 12px;color:#0E4FB3;font-weight:950;margin-bottom:14px}
.source-pill{display:inline-flex;align-items:center;gap:6px;margin-left:8px;padding:5px 10px;border-radius:999px;background:var(--blue);color:#fff;font-size:.78rem;font-weight:800;line-height:1;text-decoration:none;white-space:nowrap;box-shadow:0 8px 18px rgba(38,125,244,.22);transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.source-pill:hover{background:#0f65d8;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(38,125,244,.32)}
.source-pill:after{content:"↗";font-size:.72rem;opacity:.9}

/* Oevae sticky help footer - fixed to bottom, not floating in page flow */
body.has-sticky-footer{padding-bottom:96px}
.oevae-sticky-help{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:9999;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:28px;
  width:100%;
  padding:16px 22px;
  background:var(--blue);
  border-top:1px solid rgba(255,255,255,.18);
  box-shadow:0 -10px 30px rgba(15,35,70,.18);
}
.oevae-sticky-help .oevae-help-message{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  max-width:860px;
  margin:0;
  padding:0;
  color:#ffffff;
  font-size:clamp(.98rem,2vw,1.28rem);
  font-weight:800;
  line-height:1.25;
  text-align:center;
  text-decoration:none;
  letter-spacing:-.01em;
}
.oevae-sticky-help .oevae-help-message:hover{
  color:#ffffff;
  text-decoration:underline;
  text-underline-offset:4px;
}
.oevae-sticky-help .oevae-help-button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:118px;
  margin:0;
  padding:11px 20px;
  border-radius:999px;
  background:#ffffff;
  color:var(--blue);
  font-size:.95rem;
  font-weight:900;
  line-height:1;
  text-align:center;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 8px 18px rgba(0,0,0,.14);
  transition:transform .16s ease,background .16s ease,color .16s ease;
}
.oevae-sticky-help .oevae-help-button:hover{
  background:#eef5ff;
  color:#0f65d8;
  transform:translateY(-1px);
  text-decoration:none;
}
@media(max-width:860px){.chip-grid,.info-grid{grid-template-columns:1fr}.hero-links{display:grid}.hero-links a{justify-content:center}}
@media(max-width:760px){.shell{padding-top:20px}.hero{padding:28px 22px}.grid{grid-template-columns:1fr}.panel{padding:22px}h1{letter-spacing:-.05em}.btn{width:100%}.actions{display:grid}}
@media(max-width:720px){
  body.has-sticky-footer{padding-bottom:142px}
  .oevae-sticky-help{flex-direction:column;gap:10px;padding:14px 16px}
  .oevae-sticky-help .oevae-help-button{width:100%;max-width:220px}
}
/* v11: make disabled NFC controls clearly inactive, not Oevae blue */
.btn:disabled,
.btn[disabled] {
  background: #d8e1ee !important;
  color: #6c7a90 !important;
  box-shadow: none !important;
  transform: none !important;
  opacity: 1 !important;
  cursor: not-allowed !important;
}

.btn:disabled:hover,
.btn[disabled]:hover {
  background: #d8e1ee !important;
  color: #6c7a90 !important;
  box-shadow: none !important;
  transform: none !important;
}