:root {
  color-scheme: light dark;
  --bg: var(--tg-theme-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #1f2937);
  --hint: var(--tg-theme-hint-color, #6b7280);
  --button: var(--tg-theme-button-color, #2481cc);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --danger: #d9534f;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 20px max(24px, env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.card { width: min(100%, 360px); text-align: center; }

.shield {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  border-radius: 50%;
  color: var(--button-text);
  background: var(--button);
  font-size: 34px;
  font-weight: 700;
}

h1 { margin: 0 0 12px; font-size: 25px; line-height: 1.2; }
p { margin: 0; color: var(--hint); font-size: 16px; line-height: 1.45; }

button {
  width: 100%;
  margin-top: 30px;
  min-height: 50px;
  border: 0;
  border-radius: 12px;
  background: var(--button);
  color: var(--button-text);
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}
button:disabled { opacity: .65; cursor: wait; }
.status { margin-top: 18px; font-size: 14px; }
.status.error { color: var(--danger); }