body {
    margin: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column; 
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #222;
    font-family: sans-serif;
}

.game-container {
    border: 2px solid #444;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    margin-bottom: 10px; 
}

canvas {
    display: block; 
    background-color: #333;
}

.controls {
    margin-top: 10px;
    padding: 10px;
    background-color: #444;
    border-radius: 5px;
}

.controls button {
    margin: 0 5px;
    padding: 8px 15px;
    cursor: pointer;
    border: none;
    border-radius: 4px;
    background-color: #555;
    color: #fff;
    font-size: 16px;
    transition: background-color 0.2s ease;
}

.controls button:hover {
    background-color: #666;
}

/* Style for when a gate type is selected for placement */
.controls button.selected {
    background-color: #0f0; 
    color: #000;
    font-weight: bold;
}