body {
    background-color: #000;
    color: #0f0;
    font-family: 'Courier New', Courier, monospace;
    text-align: center;
}

h1 {
    color: #0f0;
}

canvas {
    background-color: #111;
    border: 2px solid #0f0;
}

#game-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

#ui-panel {
    width: 200px;
    margin-left: 20px;
    border: 2px solid #0f0;
    padding: 10px;
}

#tower-selection .tower-option {
    border: 1px solid #0f0;
    padding: 10px;
    margin-bottom: 10px;
    cursor: pointer;
}

#tower-selection .tower-option:hover {
    background-color: #030;
}

#tower-selection .tower-option.selected {
    background-color: #060;
}