body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    background-color: #111;
    color: #eee;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    touch-action: none; /* Prevents pull-to-refresh and scrolling on mobile */
}

#score-board {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

canvas {
    background-color: #000;
    border: 4px solid #333;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    max-width: 95vw;
    max-height: 60vh;
}

/* Mobile On-Screen Controls */
.controls {
    display: none;
    margin-top: 30px;
    gap: 10px;
}

.controls button {
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 24px;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.controls button:active {
    background-color: #555;
}

/* Show D-pad only on mobile devices */
@media (max-width: 768px) {
    .controls {
        display: grid;
        grid-template-columns: 60px 60px 60px;
        grid-template-rows: 60px 60px;
    }
    #up-btn { grid-column: 2; grid-row: 1; }
    #left-btn { grid-column: 1; grid-row: 2; }
    #down-btn { grid-column: 2; grid-row: 2; }
    #right-btn { grid-column: 3; grid-row: 2; }
}