body {
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  background: #EAFBF6;
}
.card { text-align: center; padding: 40px 24px; max-width: 360px; }
h1 { color: #0B1B2B; font-size: 32px; margin-bottom: 8px; font-weight: 800; }
p { color: #64748B; margin-bottom: 32px; line-height: 1.5; font-size: 16px; }
.btn {
  display: inline-block;
  background: #58C9AE;
  color: white;
  padding: 14px 32px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
}
.btn:hover { background: #3fb898; }
.sub { margin-top: 16px; font-size: 13px; color: #94A3B8; }
.sub a { color: #58C9AE; }