* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

body {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    user-select: none;
}

#game {
    margin: 20px 0;
}

#game,
#player1,
#player2 {
    position: relative;
    display: flex;
    gap: 10px;
}

.name {
    font-size: 2rem;
    font-weight: 600;
    position: absolute;
}

#player1 .name {
    left: 0px;
}

#player2 .name {
    right: 0px;
}

.score {
    font-size: 100px;
    padding: 0 1rem;
}

.score,
.shape {
    min-width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shape {
    border-radius: 1rem;
    border: 1px solid #777;
    background-repeat: no-repeat;
    background-size: 200px 200px;
    transition: background-image 1s; /* 为什么没有作用？ */
}

#player2 .shape {
    transform: scaleX(-1);
}

kbd {
    padding: 4px 8px;
    border-radius: 0.25rem;
    border: 1px solid #777;
    background-color: #eee;
}