:root{
    --font-size: 2rem; /* 1rem = 16px */
    --game-over-msg-font: 3rem;
    --game-over-score-msg-font: 2rem;
    --game-over-score-padding: 1.5rem;
    --btn-font-size: 1.5rem;
}

*{
    padding: 0;
    margin: 0;
    box-sizing: content-box;
}

body{
    height: 100vh;
    max-height: 100vh;
    background-color: black;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container{
    width: 400px;
    height: 450px;
    position: relative;
}

#cvs{
    position: absolute;
    left: 0;
    bottom: 0;
}

.score{
    position: absolute;
    top: 0;
    left: 0;
    
    font-size: var(--font-size);

    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-weight: bolder;
}

.high-score{
    position:absolute;
    top: 0;
    right: 0;

    font-size: var(--font-size);

    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-weight: bolder;
}

.game-over{
    width: 100%;
    height: 100%;

    position: absolute;
    top: 0;
    left: 0;
    right: 0;

    background-color: rgba(0, 0, 0, 0.85);

    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;

    font-size: var(--game-over-msg-font);
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;

    border: 1px solid rgb(33, 33, 33);
}

.message{
    font-weight: bolder;
}

.game-over-score{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    padding: var(--game-over-score-padding);
    font-size: var(--game-over-score-msg-font);
}

.play-again{
    background-color: rgb(17, 170, 25);
    color: rgb(201, 255, 203);
    padding: 1rem 1.5rem;
    margin-top: 1rem;
    font-size: var(--btn-font-size);
    border-radius: 0.75rem;
    transition: all 300ms ease-in-out;
    cursor: pointer;
}

.play-again:hover{
    padding: 1rem 2rem;
    background-color: rgb(23, 214, 33);
    color: rgb(254, 254, 254);
}

.hide{
    visibility: hidden;
}