body {
  font-family: 'Segoe UI', sans-serif;
  background: #1c1c1c;
  color: #fff;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: #2a2a2a;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0px 8px 20px rgba(0,0,0,0.4);
  width: 400px;
  text-align: center;
}

h1 {
  margin-bottom: 15px;
  font-size: 1.5rem;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 15px;
}

.controls label {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview {
  height: 150px;
  border-radius: 12px;
  margin-bottom: 15px;
  border: 2px solid #444;
}

.buttons {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

button {
  background: #444;
  border: none;
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  color: white;
  font-weight: bold;
  transition: background 0.3s;
}

button:hover {
  background: #666;
}

textarea {
  width: 100%;
  height: 80px;
  border-radius: 8px;
  border: none;
  padding: 10px;
  resize: none;
  font-family: monospace;
}