:root{
  --bg: #0f172a;
  --card: rgba(255,255,255,.06);
  --text: #e5e7eb;
  --muted: #cbd5e1;
  --accent: #ffd200;
  --border: rgba(255,255,255,.12);
}
*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 20% 10%, rgba(255,210,0,.18), transparent 55%),
              radial-gradient(900px 500px at 80% 90%, rgba(59,130,246,.18), transparent 60%),
              var(--bg);
  color: var(--text);
}
.wrap{
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 32px 16px;
}
.card{
  width: min(720px, 100%);
  border: 1px solid var(--border);
  background: var(--card);
  backdrop-filter: blur(10px);
  border-radius: 18px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: 0 20px 80px rgba(0,0,0,.35);
}
.sign{
  width: min(360px, 72vw);
  height: auto;
  display: block;
  margin: 0 auto 18px;
  filter: drop-shadow(0 14px 35px rgba(0,0,0,.45));
}
h1{
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: .2px;
}
p{
  margin: 0 auto 10px;
  max-width: 52ch;
  line-height: 1.55;
  color: var(--muted);
  font-size: 18px;
}
.small{
  margin-top: 14px;
  font-size: 14px;
  opacity: .8;
}