* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  min-height: 100vh;
  margin: 0;
  padding: 40px;
  color: #111;
}

header {
  background: white;
  padding: 20px;
  border-radius: 14px;
  margin-bottom: 25px;
}

main {
  background: white;
  padding: 25px;
  border-radius: 14px;
}

textarea {
  width: 100%;
  height: 120px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  resize: none;
}

.info {
  margin-top: 8px;
  color: #555;
}

.controls {
  margin-top: 20px;
}

button {
  padding: 10px 18px;
  margin-right: 10px;
  border: none;
  border-radius: 10px;
  background: #6366f1;
  color: white;
  cursor: pointer;
  transition: opacity 0.2s;
}

button:hover {
  opacity: 0.85;
}

.highlight {
  background: #fef3c7;
  border-color: #f59e0b;
}