[data-reversi-root] {
  --reversi-ink: #17221c;
  --reversi-muted: #53645a;
  --reversi-line: #bdd0c2;
  --reversi-panel: #f5faf6;
  --reversi-board: #2f8054;
  --reversi-board-dark: #1f6841;
  --reversi-accent: #16663e;
  --reversi-focus: #ffb000;
  color: var(--reversi-ink);
  overflow-x: auto;
  overflow-y: visible;
  scrollbar-gutter: stable;
}

[data-reversi-root] *,
[data-reversi-root] *::before,
[data-reversi-root] *::after {
  box-sizing: border-box;
}

[data-reversi-root] button {
  font: inherit;
}

[data-reversi-root] [data-reversi-mode],
[data-reversi-root] [data-reversi-difficulty],
[data-reversi-root] [data-reversi-side],
[data-reversi-root] [data-reversi-undo],
[data-reversi-root] [data-reversi-restart],
[data-reversi-root] [data-reversi-share] {
  min-height: 44px;
  border: 1px solid var(--reversi-line);
  border-radius: 0.65rem;
  background: #fff;
  color: var(--reversi-ink);
  padding: 0.6rem 0.85rem;
  cursor: pointer;
  touch-action: manipulation;
}

[data-reversi-root] [data-reversi-mode].is-active,
[data-reversi-root] [data-reversi-difficulty].is-active,
[data-reversi-root] [data-reversi-side].is-active,
[data-reversi-root] [aria-pressed="true"] {
  border-color: var(--reversi-accent);
  background: #e4f5e9;
  color: #0b502d;
  font-weight: 800;
}

[data-reversi-root] button:focus-visible {
  outline: 3px solid var(--reversi-focus);
  outline-offset: 3px;
}

[data-reversi-root] button:disabled {
  cursor: not-allowed;
}

[data-reversi-root] [data-reversi-mode]:disabled,
[data-reversi-root] [data-reversi-difficulty]:disabled,
[data-reversi-root] [data-reversi-side]:disabled,
[data-reversi-root] [data-reversi-undo]:disabled,
[data-reversi-root] [data-reversi-restart]:disabled,
[data-reversi-root] [data-reversi-share]:disabled {
  opacity: 0.55;
}

[data-reversi-root] .reversi-mode-controls,
[data-reversi-root] .reversi-option-controls,
[data-reversi-root] .reversi-action-controls,
[data-reversi-root] .reversi-scoreboard {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

[data-reversi-root] .reversi-game-shell {
  display: grid;
  gap: 1rem;
}

[data-reversi-root] .reversi-board-scroll {
  max-width: 100%;
  overflow-x: auto;
  padding: 0.25rem 0.2rem 0.75rem;
  overscroll-behavior-inline: contain;
}

[data-reversi-root] [data-reversi-board] {
  display: grid;
  grid-template-columns: repeat(8, minmax(44px, 1fr));
  width: min(100%, 40rem);
  min-width: 22rem;
  margin-inline: auto;
  border: 3px solid #174b31;
  background: var(--reversi-board-dark);
  box-shadow: 0 0.65rem 1.5rem rgba(16, 53, 34, 0.14);
}

[data-reversi-root] .reversi-cell {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-width: 44px;
  min-height: 44px;
  aspect-ratio: 1;
  padding: 0;
  border: 1px solid rgba(10, 54, 31, 0.68);
  border-radius: 0;
  background-color: var(--reversi-board);
  color: #fff;
  cursor: default;
  touch-action: manipulation;
}

[data-reversi-root] .reversi-cell:not(:disabled)[data-reversi-legal="true"] {
  cursor: pointer;
  background-color: #398e60;
}

[data-reversi-root] .reversi-cell:not(:disabled)[data-reversi-legal="true"]:hover {
  background-color: #48a473;
}

[data-reversi-root] .reversi-cell:focus-visible {
  z-index: 4;
  outline-color: var(--reversi-focus);
  outline-offset: -4px;
}

[data-reversi-root] .reversi-cell[data-reversi-recent="true"]::after {
  position: absolute;
  inset: 7%;
  border: 3px solid #ffd24c;
  content: "";
  pointer-events: none;
}

[data-reversi-root] .reversi-disc {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 76%;
  aspect-ratio: 1;
  border-radius: 50%;
  font-size: clamp(0.72rem, 2.4vw, 1.15rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  user-select: none;
}

[data-reversi-root] .reversi-disc[data-reversi-disc="empty"] {
  display: none;
}

[data-reversi-root] .reversi-disc[data-reversi-disc="black"] {
  border: 2px solid #f1f4f2;
  background: radial-gradient(circle at 34% 30%, #4a504d 0 12%, #131715 48%, #050706 100%);
  color: #fff;
  box-shadow: inset -0.22rem -0.3rem 0.4rem rgba(0, 0, 0, 0.36), 0 0.12rem 0.2rem rgba(0, 0, 0, 0.28);
}

[data-reversi-root] .reversi-disc[data-reversi-disc="white"] {
  border: 3px double #18231d;
  background: repeating-linear-gradient(135deg, #fff 0 5px, #dce8df 5px 9px);
  color: #16231c;
  box-shadow: inset -0.18rem -0.22rem 0.32rem rgba(52, 76, 60, 0.18), 0 0.12rem 0.2rem rgba(0, 0, 0, 0.2);
}

[data-reversi-root] .reversi-legal-count {
  position: absolute;
  display: none;
  min-width: 1.55rem;
  min-height: 1.55rem;
  place-items: center;
  border: 2px dashed #fff;
  border-radius: 50%;
  background: rgba(10, 63, 36, 0.76);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1;
}

[data-reversi-root] .reversi-cell[data-reversi-legal="true"] .reversi-legal-count {
  display: grid;
}

[data-reversi-root] [data-reversi-turn] {
  font-weight: 900;
}

[data-reversi-root] [data-reversi-status] {
  min-height: 1.6em;
  margin: 0;
  color: var(--reversi-muted);
  font-weight: 650;
}

[data-reversi-root] [data-reversi-recent],
[data-reversi-root] [data-reversi-date],
[data-reversi-root] [data-reversi-record],
[data-reversi-root] [data-reversi-streak] {
  color: var(--reversi-muted);
  font-variant-numeric: tabular-nums;
}

[data-reversi-root][data-reversi-thinking="true"] [data-reversi-board] {
  cursor: progress;
}

[data-reversi-root][data-reversi-thinking="true"] .reversi-cell {
  pointer-events: none;
}

@media (max-width: 520px) {
  [data-reversi-root] .reversi-mode-controls,
  [data-reversi-root] .reversi-option-controls,
  [data-reversi-root] .reversi-action-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  [data-reversi-root] [data-reversi-mode],
  [data-reversi-root] [data-reversi-difficulty] {
    padding-inline: 0.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-reversi-root] *,
  [data-reversi-root] *::before,
  [data-reversi-root] *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media (forced-colors: active) {
  [data-reversi-root] [data-reversi-board],
  [data-reversi-root] .reversi-cell,
  [data-reversi-root] .reversi-disc,
  [data-reversi-root] .reversi-legal-count {
    forced-color-adjust: none;
  }

  [data-reversi-root] [data-reversi-board] {
    border-color: CanvasText;
    background: Canvas;
  }

  [data-reversi-root] .reversi-cell {
    border-color: CanvasText;
    background: Canvas;
  }

  [data-reversi-root] .reversi-disc[data-reversi-disc="black"] {
    border-color: Canvas;
    background: CanvasText;
    color: Canvas;
    box-shadow: none;
  }

  [data-reversi-root] .reversi-disc[data-reversi-disc="white"] {
    border: 3px double CanvasText;
    background: Canvas;
    color: CanvasText;
    box-shadow: none;
  }

  [data-reversi-root] .reversi-legal-count {
    border-color: LinkText;
    background: Canvas;
    color: LinkText;
  }

  [data-reversi-root] .reversi-cell[data-reversi-recent="true"]::after {
    border-color: Highlight;
  }
}