body {
    background-color: #0d1117;
    color: #e6edf3;
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
}

h1 {
    color: #c9d1d9;
    margin-bottom: 10px;
}

#gameCanvas {
    background-color: #010409;
    border: 2px solid #30363d;
    cursor: crosshair;
}

.instructions {
    margin-top: 20px;
    font-size: 0.9em;
    color: #8b949e;
}

#restartButton {
    background-color: #2185d0;
    color: white;
    border: none;
    padding: 10px 20px;
    margin-top: 10px;
    font-size: 1em;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
}

#restartButton:hover {
    background-color: #1a6da0;
}