:root {
    --board-size: 8;
    --light-square: #f0d9b5; /* Svetlé drevo */
    --dark-square: #b58863;  /* Tmavé drevo */
    --red-piece: #cc0000;    /* Farba hráča 1 (Červený) */
    --black-piece: #333333;  /* Farba hráča 2 (Čierny/AI) */
    --king-color: gold;      /* Farba pre Dámu */
    --highlight-color: #55ff55; /* Zelené zvýraznenie pre legálne ťahy */
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #000033;
    margin: 0;
}

.container {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    width: 95%; 
    max-width: 450px; 
}

h1 {
    margin-top: 0;
    color: #333;
}

#game-info {
    margin-bottom: 15px;
    font-size: 1.1em;
}

#board {
    display: grid;
    grid-template-columns: repeat(var(--board-size), 1fr);
    grid-template-rows: repeat(var(--board-size), 1fr);
    gap: 0;
    border: 5px solid var(--dark-square);
    aspect-ratio: 1 / 1;
}

.square {
    width: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    cursor: pointer;
    box-sizing: border-box;
}

/* Farby polí */
.light {
    background-color: var(--light-square);
}
.dark {
    background-color: var(--dark-square);
}

/* Figúrka */
.piece {
    width: 80%;
    height: 80%;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    transition: transform 0.1s;
    pointer-events: none; /* Umožňuje kliknúť na pole, nie na figúrku */
}

/* Farby figúrok */
.red {
    background-color: var(--red-piece);
    border: 3px solid #ff7777;
}
.black {
    background-color: var(--black-piece);
    border: 3px solid #666;
}

/* Zvýraznenie pre vybranú figúrku */
.selected-piece {
    border: 4px solid var(--highlight-color);
}

/* Zvýraznenie pre legálny ťah */
.highlight-move {
    background-color: var(--highlight-color);
    box-shadow: inset 0 0 0 4px white;
    cursor: pointer;
}

/* Dáma (King) */
.king::after {
    content: "👑"; /* Symbol korunky */
    position: absolute;
    font-size: 1.2em;
    line-height: 1;
    color: var(--king-color);
    text-shadow: 0 0 3px black;
}

#reset-button {
    padding: 10px 20px;
    margin-top: 20px;
    font-size: 1em;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
#reset-button:hover {
    background-color: #0056b3;
}