:root {
    --background-color: #f0f0f0;
    --text-color: #333;
    --canvas-background: #fff;
    --canvas-border: #333;
    --player-color: blue;
    --obstacle-color: red;
    --score-color: black;
}

[data-theme='dark'] {
    --background-color: #333;
    --text-color: #f0f0f0;
    --canvas-background: #444;
    --canvas-border: #f0f0f0;
    --player-color: lightblue;
    --obstacle-color: pink;
    --score-color: white;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: var(--background-color);
    font-family: sans-serif;
    color: var(--text-color);
}

h1 {
    margin-bottom: 20px;
    font-size: 3em;
}

#theme-toggle {
    margin-bottom: 20px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: var(--text-color);
    color: var(--background-color);
    cursor: pointer;
}

canvas {
    border: 2px solid var(--canvas-border);
    background-color: var(--canvas-background);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}