/* ゲームテンプレ用 最小スタイル（320px 想定） */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  width: 100%;
  min-height: 100vh;
  background: #1a1a2e;
  color: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
#root {
  max-width: 320px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 16px;
  text-align: center;
}
h1 { font-size: 20px; margin-bottom: 16px; }
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #ff6b35;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  margin: 8px;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
#reward-cta { margin-top: 24px; }