body {
    margin: 0;
    background: #222;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    color: white;
    font-size: 20px;
}

#topUI {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    margin-top: 20px;
}

#startBtn {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
}

#score {
    font-size: 22px;
}

#gameWrapper {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #222;
}

#game {
    height: 100%;      /* 부모 기준 최대 세로 */
    display: grid;
    aspect-ratio: 1 / 1; /* 가로:세로 = 1:1 */
    background: #111;
}

.pixel {
    width: 100%;
    height: 100%;
}

.snake {
    background-color: lime;
}

.apple {
    background-color: red;
}

.golden {
    background-color: gold;
}

.poison {
    background-color: purple;
}

#gameInfo {
    max-width: 400px;
    color: white;
    font-size: 18px;
    line-height: 1.5;
    margin-left: 50px;
}