* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f0f2f5;
  color: #333;
  padding: 20px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 30px;
}
header h1 {
  font-size: 2rem;
  color: #2c3e50;
}

/* Container */
.container {
  max-width: 800px;
  margin: auto;
  background-color: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

/* Textarea */
textarea {
  width: 100%;
  height: 180px;
  font-size: 16px;
  font-family: monospace;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  resize: vertical;
  margin-top: 10px;
  margin-bottom: 15px;
  background: #f9f9f9;
}

/* Button */
button {
  display: inline-block;
  background-color: #007bff;
  color: white;
  padding: 10px 25px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s ease;
}
button:hover {
  background-color: #0056b3;
}

/* Output */
pre#output {
  background-color: #000;
  color: #0f0;
  padding: 15px;
  border-radius: 8px;
  min-height: 120px;
  white-space: pre-wrap;
  margin-top: 10px;
  font-family: monospace;
}


/* Footer */
footer {
  text-align: center;
  margin-top: 40px;
  font-size: 14px;
  color: #555;
}