.notice-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.notice-box {
  background: #fff;
  padding: 20px 30px;
  border-radius: 10px;
  text-align: center;
  max-width: 400px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  position: relative;
}
.notice-box h3 {
  color: #6a3ef5;
  margin-bottom: 10px;
}
.notice-box button {
  margin-top: 15px;
  padding: 8px 15px;
  background: #f56565;
  border: none;
  color: #fff;
  border-radius: 5px;
  cursor: pointer;
}
.notice-box .close-btn {
  position: absolute;
  top: 10px; right: 15px;
  font-size: 20px;
  cursor: pointer;
}
#notice-content {
  color: red; /* chữ thông báo màu đỏ */
  font-weight: bold;
}