/**
 * board.css — Board rendering, squares, pieces
 */

/* ── Board Container ────────────────────────────────────────────────────────── */
.board-container {
    position: relative;
    width: 600px;
    max-width: 100%;
    margin: 0 auto;
    background: var(--ck-board-dark);
    border: 3px solid var(--ck-board-border);
    border-radius: 4px;
    box-shadow: 
        0 0 20px var(--ck-player-glow),
        inset 0 0 20px rgba(0,0,0,0.5);
    overflow: hidden;
}

/* ── Board Grid ─────────────────────────────────────────────────────────────── */
.board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(8, 1fr);
    width: 100%;
    aspect-ratio: 1;
}

/* ── Squares ────────────────────────────────────────────────────────────────── */
.square {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s;
}

.square.light {
    background: var(--ck-board-light);
}

.square.dark {
    background: var(--ck-board-dark);
}

.square.highlighted {
    background: rgba(57, 255, 110, 0.2);
}

.square.highlighted-jump {
    background: rgba(255, 224, 58, 0.2);
}

.square.selected {
    background: rgba(255, 255, 255, 0.1);
}

/* ── Pieces ─────────────────────────────────────────────────────────────────── */
.piece {
    position: relative;
    width: 80%;
    height: 80%;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    z-index: 2;
    /* Pixel art styling */
    image-rendering: pixelated;
    border: 2px solid rgba(255,255,255,0.3);
}

.piece.player {
    background: radial-gradient(circle at 30% 30%, var(--ck-player), #0088aa);
    box-shadow: 0 0 8px var(--ck-player-glow);
}

.piece.ai {
    background: radial-gradient(circle at 30% 30%, var(--ck-ai), #aa1155);
    box-shadow: 0 0 8px var(--ck-ai-glow);
}

.piece.king {
    border: 2px solid rgba(255,255,255,0.6);
}

.piece.king::after {
    content: '♛';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    color: rgba(255,255,255,0.9);
    text-shadow: 0 0 4px rgba(0,0,0,0.5);
}

.piece.player.king::after {
    color: #ffffff;
}

.piece.ai.king::after {
    color: #ffffff;
}

.piece.selected {
    transform: scale(1.1);
    box-shadow: 0 0 15px var(--ck-selected-glow);
    border-color: var(--ck-selected);
}

.piece.movable {
    animation: piecePulse 1.5s ease-in-out infinite;
}

@keyframes piecePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ── Piece Counts ───────────────────────────────────────────────────────────── */
.piece-counts {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    padding: 0 10px;
}

.piece-count {
    display: flex;
    align-items: center;
    gap: 8px;
}

.piece-count-label {
    font-size: 8px;
    color: var(--ck-text-dim);
}

.piece-count-value {
    font-size: 14px;
    font-weight: bold;
}

.piece-count.player .piece-count-value {
    color: var(--ck-player);
    text-shadow: 0 0 8px var(--ck-player-glow);
}

.piece-count.ai .piece-count-value {
    color: var(--ck-ai);
    text-shadow: 0 0 8px var(--ck-ai-glow);
}

/* ── Promotion Animation ────────────────────────────────────────────────────── */
.piece.promoting {
    animation: promote 0.5s ease-out;
}

@keyframes promote {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* ── Jump Animation ─────────────────────────────────────────────────────────── */
.piece.jumping {
    animation: jump 0.3s ease-out;
}

@keyframes jump {
    0% { transform: scale(1); }
    50% { transform: scale(0.8); }
    100% { transform: scale(1); }
}

/* ── Capture Animation ──────────────────────────────────────────────────────── */
.piece.captured {
    animation: capture 0.3s ease-out forwards;
}

@keyframes capture {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(0); opacity: 0; }
}