#popup-banner {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 260px;
  z-index: 9999;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* 非表示状態 */
.popup-hidden {
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

/* 表示状態 */
.popup-show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* 画像 */
#popup-banner img {
  width: 100%;
  display: block;
}

/* 閉じるボタン */
#popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0,0,0,0.5);
  transition: background 0.2s;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 14px;
  line-height: 1;
  padding: 0;
}

#popup-close:hover {
  background: rgba(0,0,0,0.8);
}