:root {
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }

/* Scrollbar */
.custom-scrollbar::-webkit-scrollbar { width: 4px; height: 4px; }
.custom-scrollbar::-webkit-scrollbar-track { background: transparent; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: var(--c-track); border-radius: 2px; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: var(--c-muted); }

/* Focus */
:focus-visible { outline: 2px solid var(--c-sec); outline-offset: 2px; }
button:focus:not(:focus-visible),
input:focus:not(:focus-visible) { outline: none; }

/* Sliders */
input[type="range"] { -webkit-appearance: none; appearance: none; background: transparent; }

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  height: 12px; width: 12px; border-radius: 50%;
  background: var(--c-white); cursor: pointer; margin-top: -5px;
}
input[type="range"]::-webkit-slider-runnable-track {
  width: 100%; height: 2px; cursor: pointer; background: var(--c-track);
}
input[type="range"]::-moz-range-track {
  width: 100%; height: 2px; cursor: pointer; background: var(--c-track); border: 0;
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--c-white); border: 0; cursor: pointer;
}
input[type="range"]:disabled { opacity: 0.3; cursor: not-allowed; }

/* Canvas stage */
.canvas-stage { background: var(--c-bg); }

/* Canvas wrap */
#canvasWrap {
  position: relative;
  box-shadow: 0 24px 48px -16px color-mix(in oklab, var(--ombra), transparent 80%);
  outline: 1px solid var(--c-border);
}
#canvasWrap canvas { display: block; }

/* Empty state */
.canvas-stage.empty::before {
  content: "";
  position: absolute;
  inset: 24px;
  border: 1px dashed rgba(255, 255, 255, .1);
  border-radius: 4px;
  pointer-events: none;
}

/* Select */
select { -webkit-appearance: none; appearance: none; }

/* Drop zone */
#drop-zone.dragover {
  border-color: var(--c-sec);
  background: rgba(163, 163, 163, .08);
}

/* Toast */
#toast {
  position: fixed; right: 14px; bottom: 14px; z-index: 60;
  background: var(--c-border); color: var(--c-primary); border: 1px solid var(--c-track);
  padding: 10px 12px; border-radius: 8px;
  opacity: 0; transform: translateY(8px);
  transition: opacity .2s, transform .2s;
  pointer-events: none; font-size: 13px;
}
#toast.show { opacity: 1; transform: translateY(0); }

/* Drop hint */
#dropHint {
  position: fixed; inset: 0; margin: 12px;
  border: 2px dashed rgba(255, 255, 255, .15);
  border-radius: 8px; display: none; place-items: center;
  z-index: 55; color: var(--c-primary); font-size: 16px;
  background: rgba(0, 0, 0, .3);
}