:root {
    --primary-color: #00ffff;
    --secondary-color: #ff00ff;
    --background-color: #111;
    --board-color: #222;
    --cell-light: #334;
    --cell-dark: #223;
    --player-color: #ff4136;
    --ai-color: #0074d9;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Orbitron', sans-serif;
    background-color: var(--background-color);
    color: var(--primary-color);
}

.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.8);
    border-radius: 20px;
    box-shadow: 0 0 20px var(--primary-color);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 2.5em;
    text-shadow: 0 0 10px var(--primary-color);
}

.info-panel {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 20px;
}

#level-display, #score-container {
    font-size: 1.2em;
    text-shadow: 0 0 5px var(--primary-color);
}

#board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(8, 1fr);
    gap: 2px;
    border: 2px solid var(--primary-color);
    background-color: var(--board-color);
    box-shadow: 0 0 15px var(--primary-color);
}

.cell {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cell:hover {
    box-shadow: inset 0 0 10px var(--primary-color);
}

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

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

.piece {
    width: 80%;
    height: 80%;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.piece:hover {
    transform: scale(1.1);
    box-shadow: 0 0 10px var(--secondary-color);
}

.player {
    background-color: var(--player-color);
    box-shadow: 0 0 10px var(--player-color);
}

.ai {
    background-color: var(--ai-color);
    box-shadow: 0 0 10px var(--ai-color);
}

.king::after {
    content: '♔';
    font-size: 1.5em;
    color: #fff;
    text-shadow: 0 0 3px #000;
}

.selected {
    box-shadow: 0 0 15px var(--secondary-color);
}

.valid-move {
    background-color: rgba(0, 255, 0, 0.3);
}

#controls {
    margin-top: 20px;
}

button {
    padding: 10px 20px;
    font-size: 1em;
    font-family: 'Orbitron', sans-serif;
    background-color: var(--primary-color);
    color: var(--background-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background-color: var(--secondary-color);
    box-shadow: 0 0 10px var(--secondary-color);
}

#status {
    font-size: 10px;
    margin-top: 20px;
    text-align: center;
    font-family: 'Montserrat', sans-serif;
    text-shadow: 0 0 5px var(--primary-color);
}

@media (max-width: 600px) {
    .game-container {
        padding: 10px;
    }

    h1 {
        font-size: 1.8em;
    }

    #level-display, #score-container {
        font-size: 1em;
    }

    .cell {
        width: 40px;
        height: 40px;
    }
}

@media (min-width: 601px) {
    .game-container {
        padding: 20px;
    }

    h1 {
        font-size: 3em;
    }

    #level-display, #score-container {
        font-size: 1.5em;
    }

    .cell {
        width: 60px;
        height: 60px;
    }
}