@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap");
body {
  margin: 0;
  overflow: hidden;
  background-color: #0a0a0a;
  font-family: "Inter", sans-serif;
  color: white;
}
canvas {
  display: block;
  outline: none;
}

.glass {
  background: rgba(15, 15, 15, 0.7);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.custom-slider {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
}
.custom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: #3b82f6;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s;
}
.custom-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.sidebar-item {
  margin-bottom: 1.5rem;
}
.sidebar-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: #71717a;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: block;
}

.hero-name {
  bottom: -2rem;
  font-weight: 600;
  font-size: clamp(3rem, 2vw, 22rem);
  user-select: none;
  white-space: nowrap;
}

#drop-zone.dragover {
  background: rgba(59, 130, 246, 0.1);
  border-color: #3b82f6;
}

/* Animation cho UI */
.fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}