:root{
  --bg:#050505;
  --fg:#eaeaea;
  --muted:rgba(255,255,255,.6);
  --card:rgba(255,255,255,.04);
  --stroke:rgba(255,255,255,.10);
  --shadow: 0 30px 120px rgba(0,0,0,.65);
  --r: 22px;
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  color:var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  letter-spacing:.02em;
  background:
    radial-gradient(circle at 50% 35%, rgba(255,255,255,.06), transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(255,255,255,.03), transparent 55%),
    var(--bg);
}

.wrap{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:32px 18px;
}

.card{
  width:min(560px, 92vw);
  border-radius:var(--r);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border:1px solid var(--stroke);
  box-shadow: var(--shadow);
  padding:28px 22px;
  text-align:center;
  position:relative;
  overflow:hidden;
}

/* subtle “glass” without screaming */
.card::before{
  content:"";
  position:absolute;
  inset:-40px;
  background: radial-gradient(circle at 50% 20%, rgba(255,255,255,.08), transparent 55%);
  filter: blur(12px);
  opacity:.55;
  pointer-events:none;
}

.signal{
  width:10px;
  height:10px;
  border-radius:999px;
  margin: 6px auto 18px;
  background: rgba(255,255,255,.85);
  box-shadow: 0 0 0 0 rgba(255,255,255,.35);
  animation: ping 2.4s ease-in-out infinite;
}

@keyframes ping{
  0%{ transform:scale(1); box-shadow:0 0 0 0 rgba(255,255,255,.28); opacity:.95}
  60%{ transform:scale(1); box-shadow:0 0 0 18px rgba(255,255,255,0); opacity:.85}
  100%{ transform:scale(1); box-shadow:0 0 0 0 rgba(255,255,255,0); opacity:.95}
}

h1{
  margin:0;
  font-size:14px;
  letter-spacing:.40em;
  opacity:.95;
  position:relative;
}

.sub{
  margin:10px 0 18px;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.12em;
  position:relative;
}

.msg{
  margin:0 0 22px;
  font-size:14px;
  line-height:1.6;
  color: rgba(255,255,255,.78);
  position:relative;
}

.actions{
  display:flex;
  gap:12px;
  justify-content:center;
  align-items:center;
  flex-wrap:wrap;
  position:relative;
}

.btn{
  display:inline-block;
  padding:10px 14px;
  border-radius:14px;
  color:var(--fg);
  text-decoration:none;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  transition: transform .18s ease, background-color .18s ease, border-color .18s ease;
}

.btn:hover{
  transform: translateY(-1px);
  background: rgba(255,255,255,.10);
  border-color: rgba(255,255,255,.22);
}

.hint{
  font-size:12px;
  color: rgba(255,255,255,.45);
  letter-spacing:.10em;
}

.foot{
  margin-top:16px;
  font-size:12px;
  color: rgba(255,255,255,.38);
  letter-spacing:.08em;
  text-align:center;
}