/*  glow + glassmorphism */
.glass-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.glass-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 25px rgba(0, 255, 255, 0.3);
}

/* Neon text glow */
.drop-shadow-neon {
  text-shadow: 0 0 5px rgba(0, 255, 255, 0.8), 0 0 10px rgba(0, 255, 255, 0.6);
}

/* Button styles */
.btn {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #00f7ff;
  transition: all 0.2s ease;
}

.btn:hover {
  background: rgba(0, 255, 255, 0.1);
  border-color: rgba(0, 255, 255, 0.4);
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.4);
}

/* Smooth fade animation for preview */
#preview {
  animation: fadeIn 0.15s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0.5; transform: scale(0.99); }
  to { opacity: 1; transform: scale(1); }
}