* {
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: linear-gradient(135deg, #56ccf2, #2f80ed);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background-color: rgba(0, 0, 0, 0.3);
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
  width: 90%;
  max-width: 400px;
}

h1 {
  margin-bottom: 20px;
}

input[type="number"] {
  padding: 10px;
  width: 100%;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  margin-bottom: 15px;
}

button {
  background-color: #27ae60;
  color: white;
  padding: 12px 20px;
  font-size: 1rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s ease;
  width: 100%;
}

button:hover {
  background-color: #219150;
}

.restart {
  margin-top: 15px;
  background-color: #f39c12;
}

.message {
  margin-top: 20px;
  font-size: 1.2rem;
  min-height: 24px;
}

.attempts {
  margin-top: 10px;
  font-size: 1rem;
}