:root {
  --bg: #0f172a;         /* slate-900 */
  --fg: #e2e8f0;         /* slate-200 */
  --muted: #94a3b8;      /* slate-400 */
  --accent: #22c55e;     /* green-500 */
  --card: #11182780;     /* translucent */
  --radius: 20px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--fg);
  background:
    radial-gradient(1200px 600px at 20% -10%, #22c55e22, transparent 60%),
    radial-gradient(900px 500px at 100% 0%, #38bdf822, transparent 60%),
    var(--bg);
}

.wrap {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 3rem 1.25rem;
}

.card {
  text-align: center;
  backdrop-filter: blur(6px);
  background: var(--card);
  border: 1px solid #ffffff1a;
  padding: 3rem 2rem;
  border-radius: var(--radius);
  max-width: 720px;
  width: 100%;
  box-shadow: 0 20px 60px #00000066;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 3.5rem);
  line-height: 1.1;
  margin: 0 0 0.75rem 0;
}

p {
  color: var(--muted);
  font-size: clamp(1rem, 2.6vw, 1.125rem);
  margin: 0.25rem 0 0;
}

.btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 1.1rem;
  border-radius: 999px;
  text-decoration: none;
  color: #0b1220;
  background: var(--accent);
  font-weight: 600;
  transition: transform .15s ease, filter .15s ease;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }

footer {
  position: fixed;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  color: #9aa4b2;
  font-size: 0.9rem;
  pointer-events: none;
}