body {
  font-family: Tahoma, sans-serif;
  background-color: #f2f7fb;
  color: #333;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 800px;
  margin: auto;
  padding: 20px;
}
header {
  background-color: #4a90e2;
  color: white;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
}
main {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}
button {
  padding: 12px;
  font-size: 16px;
  background-color: #4a90e2;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
button:hover {
  background-color: #357ABD;
}
#output {
  background: #e9f1ff;
  padding: 10px;
  border-radius: 6px;
  height: 300px;
  overflow-y: auto;
  white-space: pre-wrap;
  direction: ltr;
}
footer {
  text-align: center;
  margin-top: 40px;
  font-size: 14px;
  color: #666;
}