body { font-family: Arial, sans-serif; background: #f9f9f9; color: #222; margin: 0; padding: 2em; }
h1 { color: #3a3a3a; }
textarea { width: 100%; max-width: 500px; }
button { padding: 0.5em 1.5em; font-size: 1em; }
#output { margin-top: 1em; font-weight: bold; }