html,body {
  height:100%;
  margin:0;
  background:gray;
  color:#eee;
  font-family:sans-serif;
  overscroll-behavior-y: contain;
  touch-action: none;
}

/* Responsive bar container */
#bar {
position:relative;
	z-index:100;
  display: flex;
  flex-wrap: wrap;       /* allow wrapping on small screens */
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-bottom: 0px solid #ccc;
}

#op,#sz{height:3px;}
#bar button,
#bar label,
#bar input[type="text"] {

  flex: 1 1 auto;
  min-width:auto;
  padding: 0.3rem;
/*  font-size: 1rem;*/
  border-radius: 6px;
/*  border: 1px solid black;*/
  background: lightgray;
  cursor: pointer;
  text-align: center;
}

#bar button:hover {
  background: #e0e0e0;
}

/* Grouped color tools */
.group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: center;
}

.group button,
.group label {
	
  flex: 0 1 auto;
/*  min-width: 40px;*/
}



#url {
  width: 100px;
}


label {
  display:flex;
  flex-direction:column;
/*  font-size:12px;*/
}

input[type=color] {
  width:32px;
  padding:0;
  border:none;
}

#line {
  position:fixed;   /* stick to viewport */
  bottom:0;         /* anchor at bottom */
  left:0;
  right:0;
  z-index:100;      /* above canvas */
  background:#444;
  padding:8px;
  display:flex;
  gap:4px;
  overflow-x:auto;
  justify-content:left;
}
.f {
  width:40px;
  background:#666;
  border:2px solid #999;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
}

.f.active {
  border-color:#0f0;
}

#stage {
  position:fixed;
  top:0;
  left:0;
  right:0;
  bottom:0;
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:-1;
}

#stack {
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%) scale(1);
}

canvas {
  position:absolute;
  top:0;
  left:0;
  cursor:crosshair;
}

#stack canvas {
  position:absolute;
  top:0;
  left:0;
}
#overlay {
  pointer-events:none; /* overlay won't block mouse events */
}


#bg {
  z-index:0;
  background:#fff;
}

#draw {
  z-index:0;
}

button {
/*  font-size:24px;*/
/*  width:40px;*/
/*  display:flex;*/
/*  align-items:center;*/
/*  justify-content:center;*/

}

button.activePan {
  background:#555;
  color:#0f0;
}

.BrushPanel{display: flex;bottom:55px;position:fixed;flex-direction: row; gap:5px;}



/* Mobile tweak: stack vertically */
@media (max-width: 600px) {
.BrushPanel{display: flex;bottom:55px;position:fixed;flex-direction: column; gap:5px;}

}