* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #121212;
  color: #e0e0e0;
  font-family: Arial, sans-serif;
}

.container {
  background-color: #1e1e1e;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #f0f0f0;
}

.generator {
  display: flex;
  flex-direction: column;
  align-items: center;
}

label {
  margin-bottom: 10px;
  font-size: 14px;
}

input[type="range"] {
  width: 80%;
  margin-bottom: 10px;
}

input[type="number"] {
  width: 60px;
  padding: 5px;
  text-align: center;
  margin-bottom: 10px;
}

.options {
  margin-bottom: 20px;
}

button {
  background-color: #3498db;
  color: white;
  padding: 10px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 10px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #2980b9;
}

input[type="text"] {
  width: 80%;
  padding: 10px;
  text-align: center;
  margin-bottom: 10px;
  border: 2px solid #3498db;
  border-radius: 5px;
  outline: none;
  transition: border-color 0.3s;
}

input[type="text"]:focus {
  border-color: #2980b9;
}

.feedback {
  display: none;
  margin-top: 10px;
  color: #4caf50;
  font-weight: bold;
  animation: fadeIn 0.5s forwards;
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}