:root {
  --bg: #0d1117;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #f78166;
  --card: #161b22;
  --border: #30363d;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2230 0%, var(--bg) 60%);
  color: var(--fg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.hero { width: 100%; max-width: 640px; text-align: center; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 56px 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

h1 {
  font-size: 3.2rem;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.dot { color: var(--accent); }

.tagline {
  margin-top: 12px;
  font-size: 1.25rem;
  color: var(--fg);
  font-weight: 600;
}

.sub {
  margin-top: 16px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.98rem;
}

.cta {
  display: inline-block;
  margin-top: 28px;
  padding: 12px 24px;
  background: var(--accent);
  color: #0d1117;
  font-weight: 700;
  text-decoration: none;
  border-radius: 10px;
  transition: transform 0.12s ease, filter 0.12s ease;
}

.cta:hover { transform: translateY(-1px); filter: brightness(1.05); }

footer {
  margin-top: 28px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.8rem;
  flex-wrap: wrap;
}

@media (max-width: 480px) {
  .card { padding: 40px 24px; }
  h1 { font-size: 2.4rem; }
  footer { flex-direction: column; align-items: center; }
}