body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  padding: 50px;
  background-color: #f9f9f9;
  color: #333;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
  color: #007bff;
  margin-top: 0;
}

input {
  padding: 12px;
  width: 100%;
  margin-bottom: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  box-sizing: border-box;
}

button {
  padding: 12px 20px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  width: 100%;
  font-size: 16px;
  transition: background 0.3s;
}

button:hover {
  background: #0056b3;
}

#result {
  margin-top: 20px;
  word-break: break-all;
  background: #f4f4f4;
  padding: 15px;
  border-radius: 4px;
  border-left: 4px solid #28a745;
  min-height: 20px;
}