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

body {
  margin: 0;
  padding: 0;
  background: linear-gradient(to right, #00c6ff, #0072ff);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.game-card {
  background: rgba(255, 255, 255, 0.1);
  padding: 30px 25px;
  border-radius: 16px;
  width: 100%;
  max-width: 400px;
  text-align: center;
  color: #fff;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 20px rgba(0,0,0,0.2);
}

h1 {
  font-size: 24px;
  margin-bottom: 10px;
}

p {
  font-size: 16px;
  margin: 10px 0;
}

input[type="number"] {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border-radius: 8px;
  border: none;
  outline: none;
  margin-bottom: 15px;
}

button {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  color: white;
  background-color: #007bff;
  margin-top: 10px;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #0056b3;
}

#restartBtn {
  background-color: #28a745;
  display: none;
}

#restartBtn:hover {
  background-color: #1e7e34;
}

#feedback, #attemptsInfo {
  margin-top: 15px;
  font-size: 17px;
  line-height: 1.4;
}

/* Responsive tweaks */
@media (max-width: 480px) {
  .game-card {
    padding: 20px 15px;
  }

  h1 {
    font-size: 20px;
  }

  input[type="number"],
  button {
    font-size: 15px;
    padding: 10px;
  }

  #feedback, #attemptsInfo {
    font-size: 16px;
  }
}