body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #0d0d0d 0%, #1a1a1a 100%);
  color: #ffffff;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: radial-gradient(circle at 30% 30%, rgba(0,255,255,0.08), transparent),
              radial-gradient(circle at 70% 70%, rgba(212,0,255,0.08), transparent);
  animation: backgroundPulse 10s infinite alternate;
  z-index: -1;
}
@keyframes backgroundPulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.05); opacity: 1; }
}
header {
  text-align: center;
  padding: 4rem 2rem;
}
header h1 {
  font-size: 3rem;
  color: #00ffff;
  text-shadow: 0 0 10px #00ffff, 0 0 20px #00ffff;
}
.store {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  padding: 2rem;
}
.pack {
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 16px;
  padding: 2rem;
  width: 280px;
  text-align: center;
  transition: 0.3s;
  box-shadow: 0 0 10px rgba(0,255,255,0.1);
}
.pack:hover {
  transform: translateY(-10px);
  box-shadow: 0 0 20px rgba(212,0,255,0.4);
}
.pack h2 {
  margin-bottom: 0.5rem;
}
.pack p {
  color: #bbb;
  margin-bottom: 1rem;
}
.pack button {
  background: linear-gradient(135deg, #00ffff, #d400ff);
  color: white;
  border: none;
  padding: 12px 24px;
  font-weight: bold;
  border-radius: 50px;
  cursor: pointer;
  transition: 0.3s;
}
.pack button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(212,0,255,0.5);
}
.popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  align-items: center;
  justify-content: center;
}
.popup-content {
  background: #1a1a1a;
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0,255,255,0.5);
}
.popup-content input {
  padding: 10px;
  width: 80%;
  margin: 1rem 0;
  border-radius: 8px;
  border: 1px solid #333;
}
.popup-content button {
  margin: 0.5rem;
}