* {
    -webkit-tap-highlight-color: transparent;
    outline: none;
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    /*background: #222;*/
    font-family: Arial, sans-serif;
    user-select: none;
    color: white;
    user-select: none;
    font-family: Arial, sans-serif;
}

.top {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.board {
    position: relative;
    display: grid;
    grid-template-columns: repeat(8, var(--square-size));
    grid-template-rows: repeat(8, var(--square-size));
    border: 2px solid var(--board-border-color);
    margin-bottom: 10px;
}
.board.flipped {
    transform: rotate(180deg);
}
.board.flipped .piece {
    transform: translate(-50%, -50%) rotate(180deg);
}

.piece {
    pointer-events: none;
    position: absolute;
    width: var(--piece-size);
    height: var(--piece-size);
    border-radius: 50%;
    box-shadow: inset 0 0 15px #0008;
    border: 2px solid black;
    transform: translate(-50%, -50%);
    transition:
        top 0.2s,
        left 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    top: calc((var(--square-size) * var(--y)) + (var(--square-size) / 2));
    left: calc((var(--square-size) * var(--x)) + (var(--square-size) / 2));
}

.piece.moving {
    z-index: 1;
}
.hidden > .piece {
    visibility: hidden;
}

.piece.king::after {
    content: "";
    position: absolute;
    width: 50%;
    height: 50%;
    top: 25%;
    left: 25%;
    background-color: currentColor;
    -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><path d=\'M2 48h60l-10-32-10 24-10-28-10 28-10-24-10 32z\'/></svg>")
        no-repeat center;
    -webkit-mask-size: contain;
    mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><path d=\'M2 48h60l-10-32-10 24-10-28-10 28-10-24-10 32z\'/></svg>")
        no-repeat center;
    mask-size: contain;
    pointer-events: none;
    user-select: none;
}

/* === Tournament Theme === */
.tournament {
    --board-border-color: #fff;
    --color-light: #eeeed2;
    --color-dark: #769656;
    --piece-white-bg: #ffffff;
    --piece-black-bg: #c43b3b;
    --white-king-color: #b8860b;
    --black-king-color: #ffd700;
    --number-color: #000;
    --piece-white-border: #000;
    --piece-black-border: #000;
    --last-move-color: #d27328; /*chocolate*/
    --valid-move-color: lime;
}

/* === Traditional Theme === */
.traditional {
    --board-border-color: #fff;
    --color-light: #f0d9b5;
    --color-dark: #b58863;
    --piece-white-bg: #ffffff;
    --piece-black-bg: #000000;
    --white-king-color: #d4af37;
    --black-king-color: #c0c0c0;
    --number-color: #000;
    --piece-white-border: #000;
    --piece-black-border: #ffffff;
    --last-move-color: white;
    --valid-move-color: lime;
}

/* === Grey Theme === */
.grey {
    --board-border-color: #ccc;
    --color-light: #cccccc;
    --color-dark: #555555;
    --piece-white-bg: #ef4444;
    --piece-black-bg: #1f2937;
    --white-king-color: #1f2937;
    --black-king-color: #c0c0c0;
    --number-color: #fff;
    --piece-white-border: #000;
    --piece-black-border: #ccc;
    --last-move-color: chocolate;
    --valid-move-color: lime;
}

.light {
    background-color: var(--color-light);
}

.dark {
    background-color: var(--color-dark);
}

.piece.white {
    background-color: var(--piece-white-bg);
    border-color: var(--piece-white-border);
}

.piece.black {
    background-color: var(--piece-black-bg);
    border-color: var(--piece-black-border);
}

.piece.white.king::after {
    color: var(--white-king-color);
}

.piece.black.king::after {
    color: var(--black-king-color);
}

.square {
    position: relative;
}

.tile-label {
    position: absolute;
    top: 2px;
    right: 4px;
    font-size: calc(var(--square-size) * 0.12);
    font-weight: bold;
    color: var(--number-color);
    opacity: 0.7;
    pointer-events: none;
    z-index: 1;
    font-family: monospace;
}

.board.flipped .tile-label {
    transform: rotate(180deg);
    bottom: 2px;
    left: 4px;
    top: auto;
    right: auto;
}

.last-move {
    outline: 3px solid var(--last-move-color);
    outline-offset: -6px;
}

/*  .valid-move, .selected {
    outline: calc(var(--square-size) * 0.04) solid yellow;
    outline-offset: 2px;
  }*/

.valid-move,
.selected {
    background-color: #26d926;
}

.circle {
    width: 15px;
    height: 15px;
    background: var(--color-light);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%); /* shifts it back into true center */
}

/*  .valid-move::after {
    content: "";
    position: absolute;
    inset: 2px;
    border: 2px solid var(--color-light);
    border-radius: 8px;
    pointer-events: none;
  }*/