:root {
  --bg1: #0f172a;
  --bg2: #1e293b;
  --accent: #38bdf8;
  --text: #e2e8f0;
  --muted: #94a3b8;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 50% -10%, var(--bg2), var(--bg1));
  padding: 1.5rem;
}

.card {
  max-width: 560px;
  width: 100%;
  text-align: center;
  padding: 3rem 2rem;
  background: rgba(30, 41, 59, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 24px;
  backdrop-filter: blur(8px);
  box-shadow: 0 24px 60px rgba(2, 6, 23, 0.55);
}

.icon { font-size: 4.5rem; line-height: 1; animation: float 3s ease-in-out infinite; }

h1 {
  margin: 1.2rem 0 0.6rem;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--accent), #818cf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 1.8rem;
}

.bar { display: flex; gap: 8px; justify-content: center; margin-bottom: 2rem; }

.bar span {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}

.bar span:nth-child(2) { animation-delay: 0.15s; }
.bar span:nth-child(3) { animation-delay: 0.3s; }
.bar span:nth-child(4) { animation-delay: 0.45s; }

.link {
  display: inline-block;
  margin-top: 1.25rem;
  color: #0f172a;
  background: #38bdf8;
  text-decoration: none;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
}
.link:hover { background: #7dd3fc; }
footer { font-size: 0.85rem; color: var(--muted); }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.35); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .icon, .bar span { animation: none; }
}