:root {
  --bg: #0f1115;
  --card: #171a21;
  --fg: #f5f7fa;
  --muted: #9aa4b2;
  --accent: #2ecc71;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2230, var(--bg));
  color: var(--fg);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  background: var(--card);
  border: 1px solid #232733;
  border-radius: 20px;
  padding: 48px 40px;
  max-width: 520px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0,0,0,.45);
}
.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(46,204,113,.12);
  border: 1px solid rgba(46,204,113,.35);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
h1 { font-size: 40px; letter-spacing: -.02em; margin-bottom: 14px; }
p { color: var(--fg); line-height: 1.6; margin-bottom: 10px; }
.muted { color: var(--muted); font-size: 15px; }
footer { margin-top: 28px; font-size: 13px; color: var(--muted); }