#address-converter {
  max-width: 700px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 30px;
  font-family: Arial, sans-serif;
}
input[type="text"], button {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  font-size: 16px;
  border-radius: 6px;
}
button {
  background: #007bff;
  color: #fff;
  border: none;
  cursor: pointer;
}
button:hover {
  background: #0056b3;
}
.result-box {
  margin-top: 20px;
  padding: 15px;
  background: #e7f8e7;
  border: 1px solid #28a745;
  border-radius: 8px;
  color: #155724;
}
.copy-btn {
  float: right;
  background: #28a745;
  color: #fff;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
}
.error-box {
  padding: 15px;
  background: #f8d7da;
  color: #721c24;
  border-radius: 8px;
  border: 1px solid #f5c6cb;
}