/*
 * Textile-Wave: page styles.
 * AI impact: written by Claude.
 * Human supervision: read & agreed.
 */

html, body {
  margin: 0;
  height: 100%;
  background: #000;
  color: #ccc;
  font-family: sans-serif;
}

/* the largest square that fits the window, centered */
canvas {
  display: block;
  position: absolute;
  inset: 0;
  margin: auto;
  width:  min(100vw, 100vh);
  height: min(100vw, 100vh);
}

#ui {
  position: absolute; top: 16px; left: 16px;
  z-index: 1; /* above the canvas */
  padding: 10px 16px; border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);   /* visible on the black page */
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #eee;
  font: 18px system-ui, sans-serif;
  user-select: none;
}
#ui label {
  display: inline-flex; /* checkbox and text on one centered line */
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
#ui input {
  margin: 0;
  width: 1.2em; height: 1.2em;   /* scales with the font size */
  accent-color: #4a9eff;
}