/* =====================================================================
   style.css — 15パズル（スライドパズル）ツール固有の微調整のみ。
   共通スタイルは /_shared/shirugear.css に任せる。
   ===================================================================== */

/* サイズ選択 */
.sg-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: var(--sg-space-1, 4px);
}
.sg-mode {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 0.95rem;
}

/* ツールバー（シャッフル + 計測） */
.sg-puzzle-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.sg-puzzle-stats {
  display: flex;
  gap: 18px;
}
.sg-stat {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
}
.sg-stat__label {
  font-size: 0.72rem;
  color: var(--sg-muted, #777);
}
.sg-stat__value {
  font-size: 1.3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* 盤面 */
.sg-board-wrap {
  display: flex;
  justify-content: center;
}
.sg-board {
  --sg-n: 4;
  display: grid;
  grid-template-columns: repeat(var(--sg-n), 1fr);
  gap: 6px;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1 / 1;
  padding: 6px;
  border-radius: 12px;
  background: var(--sg-border, #e5e7eb);
  outline: none;
}
.sg-board:focus-visible {
  box-shadow: 0 0 0 3px var(--sg-accent, #3b5bdb);
}

.sg-tile {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 8px;
  background: var(--sg-accent, #3b5bdb);
  color: #fff;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1rem, 6vw, 1.9rem);
  cursor: pointer;
  user-select: none;
  transition: transform 0.06s ease, filter 0.12s ease;
  min-width: 0;
  min-height: 0;
}
.sg-tile:hover {
  filter: brightness(1.06);
}
.sg-tile:active {
  transform: scale(0.96);
}
.sg-tile--blank {
  background: transparent;
  cursor: default;
}

/* クリアメッセージ */
.sg-puzzle-msg {
  margin-top: 12px;
  text-align: center;
  font-weight: 700;
  color: var(--sg-accent, #3b5bdb);
}

/* ベスト早見表 */
.sg-chart {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
}
.sg-chart-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid var(--sg-border, #e5e7eb);
}
.sg-chart-row__key {
  flex: 0 0 3.2em;
  font-weight: 600;
}
.sg-chart-row__val {
  flex: 1 1 auto;
  color: var(--sg-muted, #555);
  font-variant-numeric: tabular-nums;
}