/* Ultimate tic-tac-toe: nine small boards in a big one (js/ultimate-board.js) */

.uboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 100%;
  aspect-ratio: 1;
  padding: 4px;
  background: var(--ink);
  border-radius: 10px;
}
.umini {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  padding: 3px;
  background: var(--grid);
  border-radius: 6px;
  transition: background 0.2s;
}
/* The board the player to move must play in: tinted and outlined */
.umini.active {
  background: var(--ink);
}
.umini.active .usq {
  background: var(--hi);
}
.umini.won .usq,
.umini.drawn .usq {
  opacity: 0.35;
}
.umini.line {
  box-shadow: inset 0 0 0 3px var(--o);
}
.usq {
  position: relative;
  aspect-ratio: 1;
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: var(--paper);
  cursor: pointer;
}
.usq:disabled,
div.usq {
  cursor: default;
}
.usq:focus-visible {
  outline: 2px solid var(--x);
  outline-offset: -2px;
}
.usq svg {
  position: absolute;
  inset: 10%;
  width: 80%;
  height: 80%;
  overflow: visible;
}
.usq path,
.ubig path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.usq .mx path {
  stroke: var(--x);
  stroke-width: 11;
}
.usq .mo path {
  stroke: var(--o);
  stroke-width: 10;
}
.usq.hinted {
  background: var(--hi);
  box-shadow: inset 0 0 0 2px var(--ink);
}
/* A won small board: a big mark over it */
.ubig {
  position: absolute;
  inset: 6%;
  pointer-events: none;
}
.ubig svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}
.ubig .mx path {
  stroke: var(--x);
  stroke-width: 9;
}
.ubig .mo path {
  stroke: var(--o);
  stroke-width: 8;
}
.play-area {
  position: relative;
}

.replay-uboard {
  width: min(300px, 100%);
  margin: 4px auto;
}