/* fluid-sim — simulation-specific styles only.
   The window frame, palette, page background, fonts, and .wa-frame/.wf-* rules
   all come from the GLOBAL theme: ../../theme/css/style.css plus the active
   skin's skin-vars.css (linked in index.html). This page recolors with the
   skin and stays in sync with the core chrome. */

.fs-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

#canvas {
  display: block;
  width: 640px;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  background: #000;
  cursor: crosshair;
  touch-action: none;          /* drag to stir without scrolling the page */
  image-rendering: auto;       /* smooth when scaled down on small screens */
}

.hint {
  margin: 0;
  color: var(--content-ink);
  opacity: 0.75;
  font-size: 0.85rem;
  text-align: center;
}

/* back link bottom-left, GitHub "+URL" sprite bottom-right */
.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.back {
  color: var(--content-ink);
  font-size: 0.9rem;
  text-decoration: none;
}
.back:hover { text-decoration: underline; }

/* GitHub button = the active skin's playlist "+URL" sprite, drawn at --wf-scale */
.url-btn {
  display: inline-block;
  width:  calc(22px * var(--wf-scale));
  height: calc(18px * var(--wf-scale));
  background-image: url(../../theme/skins/blame-wired/pledit.png);
  background-size: calc(280px * var(--wf-scale)) calc(186px * var(--wf-scale));
  background-position: 0 calc(-111px * var(--wf-scale));
  image-rendering: pixelated;
  cursor: pointer;
}
.url-btn:hover,
.url-btn:focus-visible,
.url-btn:active {
  background-position: calc(-23px * var(--wf-scale)) calc(-111px * var(--wf-scale));
}