body {
  font-family: sans-serif;
  max-width: 380px;
  margin: 60px auto;
  padding: 0 1.5rem;
  background: #f9f9f9;
  color: #222;
}

h1 {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin: 0.5rem 0;
}

input[type='range'] {
  display: block;
  width: 100%;
  margin: 0.25rem 0 1rem;
}

button {
  display: block;
  margin-top: 1rem;
  padding: 8px 20px;
  font-size: 1rem;
  cursor: pointer;
  background: #4f46e5;
  color: white;
  border: none;
  border-radius: 6px;
}

button:hover {
  background: #4338ca;
}

#result-box {
  display: none;
  margin-top: 1.5rem;
  padding: 1rem;
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
}

#result {
  font-family: monospace;
  font-size: 1.1rem;
  word-break: break-all;
  margin: 0 0 0.5rem;
}

#strength {
  font-size: 0.9rem;
  color: #555;
  margin: 0 0 0.75rem;
}