html {
  --board-padding: 1rem;
  --controlbar-height: 2.5rem;
  --hover-background: rgb(from var(--focus-color) r g b / 0.1);
  --win-color: var(--focus-color);
  /* --win-color: #20d212; */
  --draw-color: #43130d;
}
html[data-color-scheme="light"] {
  --win-color: #2fd800;
  --draw-color: mistyrose;
}
button {
  padding: 0 1em;
}
select {
  background:
    url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%2092%20100%22%3E%3Cpath%20d%3D%22M21%2C40%20L46%2C70%20L71%2C40%22%20fill%3D%22none%22%20stroke%3D%22%23fffa%22%20stroke-width%3D%226%22%20stroke-linecap%3D%22round%22%2F%3E%3C%2Fsvg%3E")
    95% 50% / auto 1em no-repeat;
  appearance: none;
  box-shadow: none;
  padding: 0 1.75em 0 0.75em;
}
html[data-color-scheme="light"] select {
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%2092%20100%22%3E%3Cpath%20d%3D%22M21%2C40%20L46%2C70%20L71%2C40%22%20fill%3D%22none%22%20stroke%3D%22%23000d%22%20stroke-width%3D%226%22%20stroke-linecap%3D%22round%22%2F%3E%3C%2Fsvg%3E");
}
button,
select {
  display: inline-block;
  height: 1.6rem;
  color: var(--base-color);
  background-color: rgb(from var(--base-color) r g b / 0.07);
  border: 0.05rem solid;
  border-color: rgb(from var(--base-color-contrast) r g b / 0.5)
    rgb(from var(--base-color) r g b / 0.3)
    rgb(from var(--base-color) r g b / 0.3)
    rgb(from var(--base-color-contrast) r g b / 0.5);
  border-radius: 0;
  cursor: pointer;
  box-sizing: border-box;
}
select option:hover {
  background: var(--hover-background);
  cursor: pointer;
}
select[name="x"],
select[name="o"] {
  font-size: 0.9em;
}
.board {
  --rows: 3;
  --columns: 3;
  --cell-size: calc(
    (100vmin - var(--controlbar-height) - 2 * var(--board-padding)) /
    max(var(--rows), var(--columns))
  );

  display: grid;
  font: normal 2rem / 1 sans-serif;
  font-size: calc(0.5 * var(--cell-size));
  width: calc(var(--columns) * var(--cell-size));
  height: calc(var(--rows) * var(--cell-size));
  grid-template-columns: repeat(var(--columns), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
  border: 0.1rem solid;
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
.board .placeholder {
  font-size: var(--font-size);
  text-align: center;
  padding: 1rem;
}
.board button {
  display: flex;
  align-items: center;
  justify-content: center;
  height: auto;
  background: none transparent;
  border: 0.02rem solid rgb(from var(--base-color) r g b / 0.35);
  border-radius: 0;
  padding: 0;
}
.board button svg {
  height: 1em;
  color: var(--color);
  stroke-width: 0.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.board:not([disabled]) button:empty:hover {
  background: var(--hover-background);
}
[data-status="draw"] .board[disabled] {
  background: var(--draw-color);
}
.board[disabled] button {
  cursor: not-allowed;
}
.board button.selected {
  background: rgb(from var(--win-color) r g b / 0.3);
  /* text-shadow: 0 0 0.5rem var(--win-color); */
}
.board button.selected svg {
  color: var(--win-color);
  filter: drop-shadow(0 0 0.5rem var(--win-color));
}
#app {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
}
.board-container {
  display: flex;
  flex: auto;
  align-items: center;
  justify-content: center;
  padding: var(--board-padding);
}
.controlbar {
  display: flex;
  width: 100%;
  height: var(--controlbar-height);
  align-items: center;
  font-size: 0.9em;
  color: var(--color);
  background: rgb(from var(--base-color) r g b / 0.05);
  border-top: 0.08em solid rgb(from var(--base-color) r g b / 0.08);
  padding: 0 var(--board-padding);
  box-sizing: border-box;
}
.controlbar form {
  flex: none;
  margin-left: var(--board-padding);
}
.controlbar label {
  display: inline-block;
  margin-inline-start: 0.5em;
}
.controlbar button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-inline-start: 0.5em;
}
.controlbar button svg {
  height: 1em;
  vertical-align: middle;
  stroke-width: 0.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.controlbar .board-size {
  margin-inline-start: 0.5em;
}
.game-controls {
  flex: auto;
}
.game-controls button {
  margin-inline-start: 0;
}
@media (max-width: 600px) {
  :root {
    --board-padding: 0.5rem;
  }
  button {
    padding-left: 0.5em;
    padding-right: 0.5em;
  }
  select {
    padding-left: 0.5em;
    padding-right: 1.35em;
  }
  [data-size="n"] {
    display: none;
  }
  [data-size="s"] {
    display: inline;
  }
}
[data-size="n"] {
  display: none;
}
[data-size="s"] {
  display: inline;
}