* {
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, #0d0d14 0%, #1a1a2e 50%, #0d0d14 100%);
  background-attachment: fixed;
}

.glass-panel {
  background: rgba(26, 26, 46, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.upload-zone {
  background: linear-gradient(135deg, rgba(26, 26, 46, 0.5) 0%, rgba(37, 37, 66, 0.3) 100%);
}

.upload-zone:hover {
  background: linear-gradient(135deg, rgba(37, 37, 66, 0.6) 0%, rgba(50, 50, 93, 0.4) 100%);
}

.checkerboard {
  background-image: 
    linear-gradient(45deg, #252542 25%, transparent 25%),
    linear-gradient(-45deg, #252542 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #252542 75%),
    linear-gradient(-45deg, transparent 75%, #252542 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.svg-container svg {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  background: #32325d;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, #7c3aed, #ec4899);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
  transition: transform 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, #7c3aed, #ec4899);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

input[type="checkbox"] {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(236, 72, 153, 0.4);
  }
}

button:not(:disabled):hover {
  transform: translateY(-1px);
}

button:not(:disabled):active {
  transform: translateY(0);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #1a1a2e;
}

::-webkit-scrollbar-thumb {
  background: #32325d;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #7c3aed;
}

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

.glass-panel {
  animation: fadeIn 0.3s ease-out;
}

/* Mobile optimizations */
@media (max-width: 640px) {
  .glass-panel {
    border-radius: 16px;
  }
  
  button {
    min-height: 48px;
  }
  
  .checkerboard {
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  }
}

/* Touch-friendly tap targets */
@media (pointer: coarse) {
  button, 
  select, 
  input[type="checkbox"],
  .upload-zone {
    min-height: 44px;
  }
  
  label {
    padding: 4px 0;
  }
}