body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tg-theme-bg-color, #0e1621);
  color: var(--tg-theme-text-color, #f5f5f5);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.card { text-align: center; padding: 32px 24px; max-width: 340px; }
h1 { font-size: 20px; font-weight: 600; margin: 0 0 12px; }
p { margin: 0; opacity: .7; font-size: 14px; line-height: 1.5; }
p.err { opacity: 1; color: var(--tg-theme-destructive-text-color, #ff3b30); }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4cd964;
  display: inline-block;
  margin-right: 8px;
}