body {
  font-family: Arial, sans-serif;
  background: #f7f9fc;
  color: #333;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  padding: 40px;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: #222;
}

form {
  background: #fff;
  padding: 20px 25px;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  display: flex;
  flex-direction: column;
  gap: 15px;
  width: 320px;
  margin-bottom: 30px;
}

input {
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
  transition: border 0.2s;
}

input:focus {
  outline: none;
  border-color: #4a90e2;
}

button {
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: #4a90e2;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: #357ab7;
}

#qrcode {
  margin: 20px 0;
  padding: 16px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

#download {
  display: none;
  margin-top: 10px;
  background: #28a745;
}

#download:hover {
  background: #218838;
}

@media print {
  body * {
    visibility: hidden;
  }
  #print-area, #print-area * {
    visibility: visible;
  }
  #print-area {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    text-align: center;
  }
}