.thc-container {
  max-width: 700px;
  margin: 30px auto;
  background: #fff;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  font-family: 'Segoe UI', sans-serif;
  text-align: center;
}

.thc-container h2 {
  margin-bottom: 20px;
}

textarea#thc-input,
textarea#thc-output {
  width: 100%;
  height: 150px;
  font-family: monospace;
  font-size: 0.95rem;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  margin-bottom: 15px;
  resize: vertical;
}

.thc-buttons {
  margin-bottom: 10px;
}

.thc-buttons button,
#thc-copy {
  padding: 10px 15px;
  font-size: 1rem;
  background: #0073e6;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.3s;
}

.thc-buttons button:hover,
#thc-copy:hover {
  background: #005bb5;
}