.cg-wrap {
  box-sizing: content-box;
  position: relative;
  display: block;
  height: 0;
  padding-bottom: 100%;
  width: 100%;
}

cg-container {
  position: absolute;
  width: 100%;
  height: 100%;
  display: block;
  top: 0;
}

cg-board {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  line-height: 0;
  background-size: cover;
}

cg-board square {
  position: absolute;
  top: 0;
  left: 0;
  width: 12.5%;
  height: 12.5%;
  pointer-events: none;
}

cg-board square.move-dest {
  pointer-events: auto;
}

cg-board square.last-move {
  will-change: transform;
}

.cg-wrap piece {
  position: absolute;
  top: 0;
  left: 0;
  width: 12.5%;
  height: 12.5%;
  background-size: cover;
  z-index: 2;
  will-change: transform;
  pointer-events: none;
}

piece.anim {
  z-index: 8;
}

piece.fading {
  z-index: 1;
  opacity: 0.5;
}

.cg-wrap piece.ghost {
  opacity: 0.3;
}

.cg-wrap piece svg {
  overflow: hidden;
  position: relative;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
  opacity: 0.6;
}

.cg-wrap cg-auto-pieces,
.cg-wrap .cg-shapes,
.cg-wrap .cg-custom-svgs {
  overflow: visible;
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.cg-wrap cg-auto-pieces {
  z-index: 2;
}

.cg-wrap cg-auto-pieces piece {
  opacity: 0.3;
}

.cg-wrap .cg-shapes {
  overflow: hidden;
  opacity: 0.6;
  z-index: 2;
}

.cg-wrap .cg-custom-svgs {
  /* over piece.anim = 8, but under piece.dragging = 11 */
  z-index: 9;
}

.cg-wrap .cg-custom-svgs svg {
  overflow: visible;
}

.cg-wrap coords {
  position: absolute;
  display: flex;
  pointer-events: none;
  opacity: 0.8;
  font-family: sans-serif;
  font-size: 9px;
  color: rgba(255, 255, 255, 0.8);
}

.cg-wrap coords.ranks {
  top: 1px;
  right: 0;
  flex-flow: column-reverse;
  height: 100%;
  width: 12px;
  text-align: center;
}

.cg-wrap coords.ranks.black {
  flex-flow: column;
}

.cg-wrap coords.ranks.left {
  left: -15px;
  align-items: flex-end;
}

.cg-wrap coords.files {
  bottom: 0;
  left: 0.7ch;
  flex-flow: row;
  width: 100%;
  height: 12px;
  text-transform: uppercase;
}

.cg-wrap coords.files.black {
  flex-flow: row-reverse;
}

.cg-wrap coords coord {
  flex: 1 1 auto;
}