/* ───────────────────────────────────────────────────────────────
   reversi.css : リバーシ
   scope: .game-reversi
   ─────────────────────────────────────────────────────────────── */

.game-reversi {
    --rv-felt: #2d7a2d;
    --rv-felt-2: #266a26;
    --rv-cell: #3a8f3a;
    --rv-cell-hover: #46a346;
    --rv-frame: #1a5c1a;
}

.game-reversi .board.board-reversi {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-auto-rows: 1fr;
    width: var(--board-max);
    max-width: 100%;
    aspect-ratio: 1;
    background: var(--rv-frame);
    border: 4px solid var(--rv-frame);
    border-radius: var(--r-lg);
    gap: 2px;
    padding: 4px;
    box-shadow:
        var(--sh-md),
        inset 0 2px 6px rgba(0, 0, 0, 0.35);
    margin: 0 auto;
    align-self: center;
}

.game-reversi .cell.cell-reversi {
    background: var(--rv-cell);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: default;
    transition: background 0.12s ease;
}

.game-reversi .cell.cell-reversi:hover {
    background: var(--rv-cell-hover);
}

.game-reversi .rv-disc {
    width: 82%;
    height: 82%;
    border-radius: 50%;
    display: block;
    box-shadow:
        0 2px 5px rgba(0, 0, 0, 0.5),
        inset 0 1px 2px rgba(255, 255, 255, 0.22);
    transition: transform 0.15s ease;
    animation: rv-place 0.24s var(--ease-pop);
}

.game-reversi .rv-disc.black {
    background: radial-gradient(circle at 35% 30%, #555, #111);
}

.game-reversi .rv-disc.white {
    background: radial-gradient(circle at 35% 30%, #ffffff, #cccccc);
}

@keyframes rv-place {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate3d(0, 1, 0, 180deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate3d(0, 1, 0, 0);
    }
}

.game-reversi .rv-hint {
    width: 28%;
    height: 28%;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.35);
    display: block;
    cursor: pointer;
    transition:
        background 0.12s ease,
        transform 0.12s ease;
}

.game-reversi .cell.cell-reversi:hover .rv-hint {
    background: rgba(0, 0, 0, 0.55);
    transform: scale(1.25);
}

/* スコアパネル */
.game-reversi .rv-score {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 4px;
}

.game-reversi .rv-score-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 800;
}

.game-reversi .rv-score-item .rv-score-disc {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.game-reversi .rv-score-item.black .rv-score-disc {
    background: radial-gradient(circle at 35% 30%, #555, #111);
}

.game-reversi .rv-score-item.white .rv-score-disc {
    background: radial-gradient(circle at 35% 30%, #fff, #ccc);
}

.game-reversi .rv-score-num {
    color: var(--text);
    min-width: 2ch;
    font-variant-numeric: tabular-nums;
}