/* surakarta: rules used only by the surakarta pages (loaded after base.css). */
/* Surakarta board: a plain 6x6 grid of points, square (unlike Fanorona's
   wider-than-tall 5x9), so it reuses the same percentage-based
   absolute-positioning technique but with equal width/height totals.
   The board's namesake "loop tracks" - the 4 corner arcs that let a
   capturing slide curve off one edge and re-enter along a perpendicular
   line - are drawn as curved SVG paths in the same non-interactive
   layer as the ordinary grid lines, under the point buttons (see
   surakarta-app.js's buildSurakartaBoardDOM). Pieces use the same
   filled-disc-vs-outlined-disc convention as everywhere else in this
   app. */
.surakarta-board {
  position: relative;
  width: 100%;
  max-width: 620px;
  margin: 0 auto;
  background: var(--square-light);
  border: 3px solid var(--border);
  box-sizing: border-box;
}

.surakarta-lines {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.surakarta-lines line {
  stroke: var(--border);
  stroke-width: 2;
}

/* The 4 corner loop-track arcs, plus their short straight stub lines
   connecting the board's own edge points out to where each curve
   begins - drawn a little thicker/lighter than the plain grid lines so
   the loop tracks read as a visually distinct feature, per the task's
   emphasis that this is the game's defining (and least obvious)
   mechanic. */
.surakarta-loop-arc {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  opacity: 0.75;
}

.surakarta-loop-stub {
  stroke: var(--accent);
  stroke-width: 2;
  opacity: 0.55;
}

.surakarta-point {
  position: absolute;
  transform: translate(-50%, -50%);
  background: var(--square-light);
  border: 2px solid var(--border);
  border-radius: 50%;
  padding: 0;
  box-sizing: border-box;
  cursor: pointer;
  z-index: 2;
}

.surakarta-point-movable {
  background: var(--square-dark);
  box-shadow: 0 0 0 3px #fff, 0 0 0 6px var(--text);
}

.surakarta-point-capturable {
  box-shadow: inset 0 0 0 3px var(--accent);
}

.surakarta-point-selected {
  border-color: var(--accent);
  border-width: 3px;
}

.surakarta-point.last-move {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.surakarta-piece {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 76%;
  height: 76%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  box-sizing: border-box;
  pointer-events: none;
}

.surakarta-piece-black {
  background: #111;
  border: 2px solid #000;
}

.surakarta-piece-white {
  background: #fdfdfd;
  border: 2px solid var(--border);
}

/* Small disc icons for the color-choice picker and board placeholder,
   matching the board's own piece styling. */
.surakarta-icon-disc {
  display: inline-block;
  width: 1em;
  height: 1em;
  border-radius: 50%;
  vertical-align: middle;
  box-sizing: border-box;
}

.surakarta-icon-disc-black {
  background: #111;
  border: 2px solid #000;
}

.surakarta-icon-disc-white {
  background: #fdfdfd;
  border: 2px solid var(--border);
}

/* Worked-example loop-capture diagram on the rules page: a single
   wider figure (the loop makes for a wide diagram) rather than the
   side-by-side pair Fanorona uses for its two capture types. */
.surakarta-example-figure {
  max-width: 100%;
  margin: 0 0 1rem 0;
}

.surakarta-example-figure svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.surakarta-example-figure figcaption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

.surakarta-point-movable.last-move {
  box-shadow: inset 0 0 0 2px var(--accent), 0 0 0 3px #fff, 0 0 0 6px var(--text);
}