:root {
  color-scheme: dark;
  --bg: #000000;
  --fg: #f3f5f7;
  --accent: #3dff8a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  min-height: 100dvh;
  min-height: 100svh;
  background: #000;
  color: var(--fg);
  font-family: system-ui, -apple-system, sans-serif;
  overflow: hidden;
}

main {
  min-height: 100dvh;
  min-height: 100svh;
  display: grid;
  place-content: center;
  gap: 10px;
  padding: 24px;
  padding-top: calc(24px + env(safe-area-inset-top, 0px));
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  text-align: center;
}

.hint {
  margin: 0;
  color: #8b93a1;
  font-size: 14px;
}

.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 14px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #04210d;
  font-weight: 700;
  text-decoration: none;
}

.btn.is-visible {
  display: inline-block;
}