@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: 150px;


    --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;
    /*border: 1px solid black;*/
}

.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";
    /*border: 1px solid black;*/
}

.card-pos-a {
    grid-area: a;
    /*border: 1px solid black;
    background-color: gray;*/
}

.card-pos-b {
    grid-area: b;
    /*border: 1px solid black;    
    background-color: goldenrod;*/
}

.card-pos-c {
    grid-area: c;
    /*border: 1px solid black;
    background-color: rosybrown;*/
}

.card-pos-d {
    grid-area: d;
    /*border: 1px solid black;
    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:hover .card-inner {
    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;
}

#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: Roobert,-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
  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(.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(200px) translateY(40px);
}

.card.shuffle-right {
    transform: translateX(-250px) translateY(-40px);
}

.card.fly-in {
    transform: translateX(-1000px) translateY(-1000px) 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;
    }
}