.qr-tool {
  font-family: Arial, sans-serif;
  background: linear-gradient(180deg, #fffafa 0%, #ffecec 100%);
  border: 2px solid #b51200;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  color: #333;
  max-width: 400px;
  margin: 10px auto;
  box-shadow: 0 0 10px rgba(181, 18, 0, 0.2);
  box-sizing: border-box;
}
.qr-tool h2 {
  color: #b51200;
  font-size: 1.3rem;
  margin-bottom: 10px;
}
.qr-tool input {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: 1px solid #b51200;
  border-radius: 8px;
  font-size: 0.9rem;
  box-sizing: border-box;
}
.qr-tool button {
  background: #b51200;
  color: #fff;
  border: none;
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.3s ease;
  margin-top: 5px;
}
.qr-tool button:hover {
  background: #e01b00;
}
.qr-result img {
  margin-top: 15px;
  width: 100%;
  max-width: 200px;
  height: auto;
  border: 2px solid #b51200;
  border-radius: 10px;
}
#saveBtn {
  display: none;
  background: #000;
}
#saveBtn:hover {
  background: #b52000;
}