*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body{
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #000;
    font-family: 'Arial', sans-serif;
}
.header{
    position: absolute;
    top: 20px;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 40px;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
}
.high-score, .timer{
    flex: 1;
}
.current-score{
    flex: 2;
    text-align: center;
}
.timer{
    text-align: right;
}
.game-container{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.game-board{
    width: 720px;
    height: 720px;
    background-color: #000;
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    grid-template-rows: repeat(20, 1fr);
    gap: 8px;
    padding: 8px;
}

.game-over{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-family: 'Arial', sans-serif;
    font-size: 32px;
    display: none;
}
.snake-segment{
    background-color: #fff;
    border-radius: 50%;
    border: 1px solid #444;
}
.food{
    background-color: #ff3333;
    border-radius: 50%;
    border: 1px solid #ff6666;
}