.board-graphics {
    --piece-width: calc(var(--game-width) / 8);
    --piece-height: calc(var(--game-height) / 8);

    display: grid;

    margin: auto;
    outline: none;
}

/* FILES AND RANKS STYLING */

.board-graphics__files,
.board-graphics__ranks {
    font-weight: bold;
    font-family: "Noto Sans", Sans-Serif;
    padding-left: 2px;
}

.board-graphics__files > *,
.board-graphics__ranks > * {
    flex: 1;
}

.board-graphics__files div:nth-child(2n + 1),
.board-graphics__ranks div:nth-child(2n) {
    color: var(--secondary-color);
}

.board-graphics__files div:nth-child(2n),
.board-graphics__ranks div:nth-child(2n + 1) {
    color: var(--primary-color);
}

.board-graphics--flipped .board-graphics__files div:nth-child(2n + 1),
.board-graphics--flipped .board-graphics__ranks div:nth-child(2n) {
    color: var(--primary-color);
}

.board-graphics--flipped .board-graphics__files div:nth-child(2n),
.board-graphics--flipped .board-graphics__ranks div:nth-child(2n + 1) {
    color: var(--secondary-color);
}

.board-graphics__files {
    display: flex;
    flex-direction: row;

    position: absolute;
    left: 0px;
    bottom: 0px;
    width: 100%;
}

.board-graphics--flipped .board-graphics__files {
    flex-direction: row-reverse;
}

.board-graphics--flipped .board-graphics__ranks {
    flex-direction: column;
}

.board-graphics__ranks {
    display: flex;
    flex-direction: column-reverse;
    position: absolute;
    right: 0.15vw;
    top: 0px;
    height: 100%;
}

/* HIGHLIGHTS STYLING AND DISPLAY */

.board-graphics__pieces > * {
    position: absolute;
    width: 12.5%;
    height: 12.5%;
}

.board-graphics__move-highlight {
    opacity: 0.25;
    border-radius: 100%;
    z-index: 3;
}

.board-graphics__move-highlight:not(.board-graphics__move-highlight--capture) {
    background-color: var(--move-highlight-color);
    background-clip: content-box;
    box-sizing: border-box;
    padding: 4.2%;
}

.board-graphics__move-highlight--capture {
    border: 8px solid var(--move-highlight-color);
    box-sizing: border-box;
}

.board-graphics__move-highlight--last {
    background-color: var(--last-move-highlight-color);
    opacity: 0.5;
    z-index: 1;
    will-change: transform;
}

/* DRAGGING PIECES */

#element-pool {
    display: none;
}

.board-graphics__piece--dragged {
    opacity: 0.5;
}

.board-graphics__dragging {
    display: none;
    background-size: 700% 200%;

    position: absolute;
    width: var(--piece-width);
    height: var(--piece-height);

    pointer-events: none;

    z-index: 3;
}

/* PLAYER NAME DISPLAY WIDGET */

.board-graphics__top-player,
.board-graphics__bottom-player {
    background-color: #181818;

    align-items: center;

    font-size: 18px;
    width: var(--game-width);
    padding: 2px 10px;
    margin: auto;
    box-sizing: border-box;
}

.board-graphics__bottom-player {
    border-radius: 0px 0px 5px 5px;
}

.board-graphics__top-player {
    border-radius: 5px 5px 0px 0px;
}

/* ANIMATING PIECES */

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

.board-graphics__piece {
    background-size: 700% 200%;
    image-rendering: auto;

    position: absolute;

    will-change: transform;

    transform: translate(0px, 0px);
    transition: transform 300ms ease-in-out;

    left: 0px;
    top: 0px;

    z-index: 2;
}

.board-graphics__piece--captured {
    animation: fadeOut 300ms 80ms forwards ease-in;
}

/* GLYPHS */

.board-graphics__pieces .glyph {
    position: absolute;
    right: 0px;

    height: 40%;
    aspect-ratio: 1 / 1;

    text-align: center;
    transform: translate(30%, -30%);
    line-height: 0.9;

    background-size: contain;

    border: 1px solid white;
    border-radius: 100%;
    box-shadow: 2px 2px 6px black;
}

.board-graphics__pieces .font-icon.glyph::before {
    font-size: calc(0.4 * var(--piece-height));
}

/* LOADING ICON */

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.board-graphics:not(.board-graphics--loading) .board-graphics__loading {
    display: none;
}

.board-graphics__loading {
    background-color: rgba(15, 15, 15, 0.8);
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;

    align-content: center;
    text-align: center;
    z-index: 6;
}

.board-graphics__loading-img {
    animation: rotate 2s linear infinite;
}

/* DEFAULT BOARD STYLES */

.board-graphics__board {
    --primary-color: rgb(47 88 139);
    --secondary-color: rgb(234 233 210);
    --move-highlight-color: #262421;
    --last-move-highlight-color: rgb(0, 183, 255);

    background-size: 100%;
    image-rendering: pixelated;

    position: relative;
    grid-area: board;

    margin: auto;

    width: var(--game-width);
    height: var(--game-height);

    user-select: none;
}

/* RESULTS DISPLAY */
/* whenever a large result is to be displayed over the board */

.board-graphics__result {
    position: absolute;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;

    color: white;
    background: rgba(0, 0, 0, 0.8);
    
    z-index: 30;

    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: center;
    align-content: center;

    font-family: sans-serif;
    font-size: xxx-large;
    font-weight: bold;
}