body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(to right, #e0eafc, #cfdef3);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.card {
  background: rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2);
  backdrop-filter: blur(8px);
  border-radius: 20px;
  padding: 40px;
  width: 360px;
  text-align: center;
  color: #333;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
}

h2 {
  font-size: 26px;
  margin-bottom: 16px;
}

button {
  background-color: #4caf50;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 30px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background-color: #388e3c;
  transform: scale(1.05);
}

ul {
  list-style: none;
  padding: 0;
}

ul li {
  background: rgba(255, 255, 255, 0.4);
  margin: 8px 0;
  padding: 10px 15px;
  border-radius: 12px;
  font-size: 15px;
}

ul li.unlocked {
  background-color: #d4edda;
  font-weight: bold;
}

ul li.highlight {
  background-color: #f3ffdd;
  font-weight: bold;
  color: green;
}

.progress-container {
  background: rgba(255, 255, 255, 0.4);
  border-radius: 20px;
  margin: 15px 0;
  height: 20px;
  width: 100%;
  overflow: hidden;
}

#progress-bar {
  height: 100%;
  width: 0;
  background-color: #4caf50;
  transition: width 1s ease;
  border-radius: 20px;
}

.animate-fade-in {
  animation: fadeIn 1s ease;
}

.pulse {
  animation: pulse 2s infinite;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}