/* モーダルダイアログ（羊皮紙・遊び方）スタイリング */
.modal {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.82);
  z-index: 200;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(5px);
}
.modal-box {
  background: #181826;
  border: 2px solid #ffd700;
  border-radius: 16px;
  padding: 24px;
  width: 90%;
  max-width: 480px;
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.9);
  text-align: center;
  position: relative;
}
.parchment-box {
  background: #f4e4bc;
  color: #3d2b1f;
  border: 4px double #8b5a2b;
  font-family: 'Georgia', serif;
}
.parchment-box h3 {
  color: #5c3a21;
  border-bottom: 2px solid #8b5a2b;
  padding-bottom: 6px;
  margin-top: 0;
}
.close-x {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 22px;
  cursor: pointer;
  color: #888;
}
.close-x:hover { color: #fff; }