:root {
  color-scheme: light dark;
  --bg: var(--tg-theme-bg-color, #ffffff);
  --fg: var(--tg-theme-text-color, #111111);
  --muted: var(--tg-theme-hint-color, #7a7a7a);
  --accent: var(--tg-theme-button-color, #2481cc);
  --accent-fg: var(--tg-theme-button-text-color, #ffffff);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 20px 16px 40px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

h1 { font-size: 20px; margin: 0 0 12px; }
.prize { font-size: 16px; font-weight: 600; margin: 0 0 4px; }
.muted { color: var(--muted); font-size: 14px; }
.card {
  border: 1px solid rgba(128, 128, 128, 0.25);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
button {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-fg);
}
button[disabled] { opacity: 0.5; }
.status { margin-top: 14px; text-align: center; font-size: 15px; min-height: 22px; }
.error { color: #d1453b; }
.ok { color: #2e9e50; }