body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #121212;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background-color: #1e1e1e;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0,0,0,0.5);
  max-width: 400px;
  width: 100%;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

label {
  display: block;
  margin: 10px 0 5px;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 5px 0;
}

input[type="range"] {
  width: 100%;
  margin-bottom: 15px;
}

button {
  background-color: #4caf50;
  color: white;
  border: none;
  padding: 10px 15px;
  margin-top: 10px;
  cursor: pointer;
  width: 100%;
  border-radius: 5px;
  font-weight: bold;
}

button:hover {
  background-color: #45a049;
}

.output {
  display: flex;
  margin-top: 15px;
  gap: 10px;
}

#password {
  flex: 1;
  padding: 10px;
  border-radius: 5px;
  border: none;
  font-family: monospace;
}