#age-overlay {
  display: none; /* 初期は非表示 */
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.8);
  justify-content: center; align-items: center;
  z-index: 9999;
}
#age-box {
  background: #fff;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
  max-width: 400px;
}
#age-box button {
  background: #e74c3c;
  color: #fff;
  border: none;
  padding: 10px 20px;
  margin: 8px 6px 0 6px;
  cursor: pointer;
  border-radius: 4px;
}
#age-box p {
  margin: 0 0 10px 0;
  white-space: normal;      /* 自動折り返し */
  word-wrap: break-word;    /* 長い単語も折り返す */
  word-break: keep-all;     /* 日本語を途中で改行させない */
  line-height: 1.4;
  font-size: 14px;
  text-align: center;
}