body {
  font-family: 'Segoe UI', sans-serif;
  background: #1e1e2f;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  background: #2e2e3f;
  padding: 25px;
  border-radius: 10px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 0 15px rgba(0,0,0,0.5);
}

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

.form label {
  display: block;
  margin: 10px 0;
}

.setting input[type="number"] {
  width: 100%;
  padding: 6px;
  margin-top: 6px;
  border: none;
  border-radius: 6px;
}

.setting-group {
  background: #3a3a4f;
  padding: 15px;
  border-radius: 6px;
  margin-bottom: 20px;
}

button {
  padding: 10px;
  width: 100%;
  margin-top: 10px;
  background: #0077cc;
  border: none;
  color: white;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #005fa3;
}

.output-area {
  display: flex;
  margin-top: 15px;
  gap: 5px;
}

.output-area input {
  flex-grow: 1;
  padding: 8px;
  border: none;
  border-radius: 6px;
  background: #222;
  color: white;
  font-size: 1rem;
}

.output-area button {
  padding: 8px 12px;
  background: #4d4d70;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.output-area button:hover {
  background: #666699;
}

.strength {
  margin-top: 12px;
  text-align: center;
  font-size: 0.9em;
}

.toast {
  background: #2ecc71;
  padding: 10px;
  color: white;
  text-align: center;
  border-radius: 6px;
  display: none;
  margin-top: 10px;
}