@import url("https://fonts.googleapis.com/css2?family=Quicksand&display=swap");
:root {
    --card-width-lg: 157px;
    --card-height-lg: 220px;

    --card-width-sm: 120px;
    --card-height-sm: 168px;

    --num-cards: 4;

    --card-horizontal-space-lg: 100px;
    --card-horizontal-space-sm: 50px;

    --badge-bg-color: darkgrey;
    --primary-color: black;
    --secondary-color: #ffffff;

    --primary-font: "Quicksand", sans-serif;
}
body {
    height: 100vh;
    font-family: var(--primary-font);
}

main {
    height: 55%;
    display: flex;
    justify-content: center;
}

.card-container {
    position: relative;
    height: 100%;
    width: calc(
        var(--card-width-lg) * (var(--num-cards) / 2) +
            var(--card-horizontal-space-lg)
    );
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    grid-template-areas:
        "a b"
        "c d";
}

.card-pos-a {
    grid-area: a;
    /* background-color: gray; */
}
.card-pos-b {
    grid-area: b;
    /* background-color: goldenrod; */
}
.card-pos-c {
    grid-area: c;
    /* background-color: rosybrown; */
}
.card-pos-d {
    grid-area: d;
    /* background-color: darkcyan; */
}
.card-pos-a,
.card-pos-b,
.card-pos-c,
.card-pos-d {
    display: flex;
    justify-content: center;
    align-items: center;
}

.card {
    position: absolute;
    height: var(--card-height-lg);
    width: var(--card-width-lg);
    perspective: 1000px;
    cursor: pointer;
    transition: transform 0.6s ease-in-out;
}
.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}
.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}
.card-img {
    height: 100%;
}
.card-back {
    transform: rotateY(180deg);
}
.card-inner.flip-it {
    transform: rotateY(180deg);
}
header {
    display: flex;
    flex-direction: column;
    margin-bottom: 10px;
}
.header-title-container {
    display: flex;
    justify-content: center;
}
.header-round-info-container {
    display: flex;
    justify-content: space-evenly;
}
.current-status {
    font-size: 1.5rem;
    text-align: center;
}

.header-status-info-container,
.header-button-container,
.header-score-container,
.header-round-container,
.header-img-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.header-score-container,
.header-round-container,
.header-img-container {
    width: 150px;
}
.header-img {
    height: 75px;
    border-radius: 5px;
    border: 1px solid black;
    padding: 5px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    transform: rotate(-3deg);
}
.badge {
    background-color: var(--badge-bg-color);
    color: var(--secondary-color);
    padding: 2px 10px 3px;
    border-radius: 15px;
}
.game-play-button-container {
    width: 150px;
    height: 70px;
}

/* CSS */
#playGame {
    appearance: none;
    background-color: transparent;
    border: 2px solid #1a1a1a;
    border-radius: 15px;
    box-sizing: border-box;
    color: #3b3b3b;
    cursor: pointer;
    display: none;
    font-family: var(--primary-font);
    font-size: 16px;
    font-weight: 600;
    line-height: normal;
    margin: 0;
    min-height: 60px;
    min-width: 0;
    outline: none;
    padding: 16px 24px;
    text-align: center;
    text-decoration: none;
    transition: all 300ms cubic-bezier(0.23, 1, 0.32, 1);
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    width: 100%;
    will-change: transform;
    animation: game-play-button-fade-in 10s 1;
}

#playGame:disabled {
    pointer-events: none;
}

#playGame:hover {
    color: #fff;
    background-color: #1a1a1a;
    box-shadow: rgba(0, 0, 0, 0.25) 0 8px 15px;
    transform: translateY(-2px);
}

#playGame:active {
    box-shadow: none;
    transform: translateY(0);
}

@keyframes game-play-button-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.card.shuffle-left {
    transform: translateX(300px) translateY(40px);
}
.card.shuffle-right {
    transform: translateX(-350px) translateY(-40px);
}
.card.fly-in {
    transform: translateY(-1000px) translateX(-600px) rotate(45deg);
}

@media screen and (max-width: 600px) {
    .card {
        width: var(--card-width-sm);
        height: var(--card-height-sm);
    }
    .card-container {
        width: calc(
            var(--card-width-sm) * (var(--num-cards) / 2) +
                var(--card-horizontal-space-sm)
        );
    }
    main {
        height: 50%;
    }
    .current-status {
        font-size: 1.2rem;
    }
    .game-play-button-container {
        width: 120px;
        height: 40px;
    }
    #playGame {
        padding: 6px 8px;
        font-size: 12px;
        min-height: 40px;
    }
    .header-img {
        height: 55px;
    }
}