/* ============================================================
   Checkers
   ============================================================ */

.ck-controls {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ck-toggle {
  border: 2px solid var(--ink);
  border-radius: 999px;
  display: inline-flex;
  overflow: hidden;
}
.ck-toggle button {
  background: var(--surface);
  border: none;
  color: var(--ink-soft);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 8px 16px;
}
.ck-toggle button.active {
  background: var(--ink);
  color: #fff;
}
#difficulty-row[hidden] {
  display: none;
}

.ck-score-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.ck-status {
  color: var(--ink-soft);
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0;
  min-height: 1.4em;
  text-align: center;
}

.ck-board-wrap {
  max-width: 100%;
  overflow-x: auto;
  padding: 4px 4px 12px;
}

.ck-board {
  --ck-cell: clamp(36px, 10.5vw, 66px);
  background: var(--ink);
  border: 3px solid var(--ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  display: grid;
  gap: 2px;
  grid-template-columns: repeat(8, var(--ck-cell));
  grid-template-rows: repeat(8, var(--ck-cell));
  margin: 0 auto;
  padding: 2px;
  width: max-content;
}

.ck-square {
  align-items: center;
  appearance: none;
  border: none;
  border-radius: 8px;
  cursor: default;
  display: flex;
  justify-content: center;
  padding: 0;
  position: relative;
}
.ck-square.is-light {
  background: #f7e9c9;
}
.ck-square.is-dark {
  background: #69b7b0;
  cursor: pointer;
}
.ck-square.is-selected {
  box-shadow: inset 0 0 0 4px var(--yellow);
}
.ck-square.is-move::before,
.ck-square.is-capture::before {
  background: rgba(34, 49, 74, 0.22);
  border: 2px solid rgba(34, 49, 74, 0.35);
  border-radius: 50%;
  content: '';
  display: block;
  height: 34%;
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
  width: 34%;
}
.ck-square.is-capture::before {
}
.ck-square.is-last {
  box-shadow: inset 0 0 0 4px rgba(255, 201, 61, 0.62);
}

.ck-piece {
  align-items: center;
  border: 3px solid var(--ink);
  border-radius: 50%;
  box-shadow: inset 0 -5px 0 rgba(0, 0, 0, 0.14), 0 4px 0 rgba(34, 49, 74, 0.16);
  color: #fff;
  display: flex;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 4vw, 1.7rem);
  font-weight: 800;
  height: 76%;
  justify-content: center;
  line-height: 1;
  pointer-events: none;
  transition: transform 0.08s ease;
  width: 76%;
}
.ck-square:hover .ck-piece {
  transform: translateY(-1px);
}
.ck-piece.is-black {
  background: #263348;
}
.ck-piece.is-red {
  background: var(--simon-red);
}
.ck-piece.is-king::after {
  content: 'K';
  transform: translateY(-1px);
}
.ck-piece.is-captured {
  animation: ck-captured 0.48s ease both;
}

.ck-result-animation {
  align-items: center;
  background: rgba(34, 49, 74, 0.56);
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: 100vh;
  height: 100dvh;
  inset: 0;
  justify-content: center;
  opacity: 0;
  padding: 24px;
  pointer-events: none;
  position: fixed;
  visibility: hidden;
  width: 100vw;
  z-index: 5000;
}
.ck-result-animation[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}
.ck-result-icon {
  align-items: center;
  border: 3px solid var(--ink);
  border-radius: 50%;
  box-shadow: 0 8px 0 rgba(34, 49, 74, 0.18);
  display: inline-flex;
  flex: 0 0 82px;
  font-family: var(--font-display);
  font-size: 2.7rem;
  font-weight: 800;
  height: 82px;
  justify-content: center;
  width: 82px;
}
.ck-result-text {
  background: var(--surface);
  border: 3px solid var(--ink);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 0 rgba(34, 49, 74, 0.14);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 7vw, 2rem);
  font-weight: 800;
  line-height: 1.05;
  padding: 12px 18px;
  text-align: center;
}
.ck-result-animation.is-victory .ck-result-icon {
  animation: ck-result-icon-win 2.2s ease both;
  background: var(--simon-green);
  color: #fff;
}
.ck-result-animation.is-loss .ck-result-icon {
  animation: ck-result-icon-loss 2.2s ease both;
  background: var(--pink);
  color: #fff;
}
.ck-result-animation.is-victory .ck-result-text,
.ck-result-animation.is-loss .ck-result-text {
  animation: ck-result-text 2.2s ease both;
}

@keyframes ck-captured {
  0% { opacity: 1; transform: scale(1) rotate(0); }
  28% { opacity: 1; transform: scale(1.18) rotate(-8deg); }
  58% { opacity: 0.8; transform: scale(0.72) rotate(12deg); }
  100% { opacity: 0; transform: scale(0.2) rotate(28deg); }
}

@keyframes ck-result-icon-win {
  0% { transform: scale(0.3) rotate(-24deg); }
  16% { transform: scale(1.25) rotate(8deg); }
  30% { transform: scale(0.96) rotate(-4deg); }
  44%, 82% { transform: scale(1) rotate(0); }
  100% { transform: scale(0.92) rotate(0); }
}

@keyframes ck-result-icon-loss {
  0% { transform: scale(0.35); }
  16% { transform: scale(1.14) rotate(-9deg); }
  26% { transform: translateX(-14px) rotate(9deg); }
  36% { transform: translateX(14px) rotate(-9deg); }
  48%, 82% { transform: translateX(0) scale(1); }
  100% { transform: scale(0.92); }
}

@keyframes ck-result-text {
  0%, 12% { opacity: 0; transform: translateY(18px) scale(0.94); }
  26% { opacity: 1; transform: translateY(0) scale(1.04); }
  40%, 82% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-8px) scale(0.98); }
}

#game-stage:fullscreen,
#game-stage.is-ios-fullscreen {
  border: none;
  border-radius: 0;
  height: 100vh;
  height: 100dvh;
  height: calc(var(--obg-vh, 1vh) * 100);
  justify-content: flex-start;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  width: 100vw;
}
#game-stage:fullscreen .ck-board,
#game-stage.is-ios-fullscreen .ck-board {
  --ck-cell: min(10.6vw, 9.5vh);
  --ck-cell: min(10.6vw, 9.5dvh);
}

@media (max-width: 560px) {
  #game-stage {
    padding-left: 8px;
    padding-right: 8px;
  }
  .ck-toggle button {
    padding: 8px 10px;
  }
  .ck-board-wrap {
    overflow-x: hidden;
    padding-left: 0;
    padding-right: 0;
    width: 100%;
  }
  .ck-board {
    --ck-cell: min(calc((100vw - 58px) / 8), 43px);
    gap: 1px;
    padding: 1px;
  }
  .ck-square {
    border-radius: 6px;
  }
  .ck-piece {
    border-width: 2px;
    box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.14), 0 2px 0 rgba(34, 49, 74, 0.16);
  }
}