body {
  font-family: Arial, sans-serif;
  text-align: center;
  color: #333;
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #74ebd5, #acb6e5);
}

.container {
  max-width: 400px;
  box-sizing: border-box;
  margin: 50px auto;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.instructions {
  margin-bottom: 20px;
  font-size: 16px;
}

input {
  display: block;
  width: 100%;
  margin-bottom: 15px;
  padding: 10px;
  box-sizing: border-box;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

button {
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: bold;
  color: #fff;
  background: linear-gradient(135deg, #74ebd5, #acb6e5);
  border: none;
  border-radius: 5px;
  cursor: pointer;
  width: 100%;
  transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
  background-color: #0056b3;
  transform: translateY(-3px);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

button:active {
  transform: translateY(0);
  box-shadow: none;
}

.lock {
  font-size: 50px;
  margin-top: 20px;
}

.success_message {
  color: green;
  font-weight: 600;
}

.fail_message {
  color: red;
  font-weight: 600;
}

.stable_message {
  display: none;
}

p {
  font-size: 14px;
}