body {
  font-family: Inter, sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #1a1a1a;
}

header {
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid #e0e0e0;
}

.logo {
  height: 40px;
}

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
}

.controls {
  margin: 20px 0;
  display: flex;
  gap: 20px;
  align-items: center;
}

#previewArea {
  margin-top: 30px;
  padding: 20px;
  background: white;
  border: 1px solid #ddd;
  min-height: 600px;
}

button {
  padding: 10px 20px;
  background: #4a6fa5;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button.hidden {
  display: none;
}

footer {
  margin-top: 60px;
  padding: 20px;
  text-align: center;
  font-size: 14px;
  color: #666;
}