#chatContainer {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 300px;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  font-family: sans-serif;
  padding: 10px;
  z-index: 9999;
}
#chat {
  height: 200px;
  overflow-y: auto;
  border: 1px solid #ddd;
  margin-bottom: 10px;
  padding: 5px;
  font-size: 14px;
}
input, button {
  width: 100%;
  margin-top: 5px;
  padding: 8px;
  font-size: 14px;
}
#chatNotice {
  background-color: #fff3cd;
  color: #856404;
  font-size: 13px;
  padding: 5px 10px;
  border: 1px solid #ffeeba;
  border-radius: 5px;
  margin-bottom: 10px;
}
#chatToggleBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #2196f3;
  color: white;
  padding: 10px 15px;
  border-radius: 20px;
  cursor: pointer;
  z-index: 10000;
  font-size: 14px;
  box-shadow: 0 0 5px rgba(0,0,0,0.3);
}
@media screen and (max-width: 768px) {
  #chatContainer {
    bottom: 100px; /* ← 元は20pxだったのを上に持ち上げる */
  }

  #chatToggleBtn {
    bottom: 100px;
  }
}