* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;

  background: linear-gradient(135deg, #0f172a, #1e3a8a, #9333ea);
  background-size: 300% 300%;
  animation: bgMove 10s ease infinite;
  color: white;
}

@keyframes bgMove {
  0% {background-position: 0% 50%;}
  50% {background-position: 100% 50%;}
  100% {background-position: 0% 50%;}
}

.container {
  text-align: center;
}

.title {
  font-size: 40px;
  font-weight: bold;
  margin-bottom: 10px;
}

.subtitle {
  font-size: 20px;
  opacity: 0.9;
  margin-bottom: 30px;
}

.card {
  width: 320px;
  padding: 25px;
  border-radius: 20px;

  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);

  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: none;
  outline: none;
  font-size: 16px;
  margin-bottom: 15px;
  text-align: center;
}

.buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
}

button {
  flex: 1;
  padding: 10px;
  border-radius: 12px;
  border: none;
  cursor: pointer;

  background: #22c55e;
  color: white;
  font-weight: bold;
  transition: 0.3s;
}

button:hover {
  transform: scale(1.05);
  background: #16a34a;
}

button.secondary {
  background: #3b82f6;
}

button.secondary:hover {
  background: #2563eb;
}

#message {
  margin-top: 15px;
  font-weight: bold;
}

#attempts {
  margin-top: 5px;
  opacity: 0.8;
  font-size: 14px;
}