body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #1f1f1f;
    color: white;
}

header {
    padding: 16px;
    background: #111;
    border-bottom: 1px solid #333;
}

h1 {
    margin: 0;
}

#gameBoard {
    position: relative;
    width: 900px;
    height: 600px;
    margin: 24px auto;
    background: #2d2d2d;
    border: 2px solid #555;
    overflow: hidden;
}

.player {
    position: absolute;
    width: 32px;
    height: 32px;
    background: #00a53a;
    border: 2px solid white;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.player.me {
    background: #2f80ed;
}