@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: "Poppins"
}

/* header{
	position: relative;
	left: 0;
	top: 0;
	width: 100%;
	height: 80px;
}

header h4{
	position: absolute;
	left: 10%;
	bottom: 1rem;
	font-size: 1.6rem;
} */
.intro{
	position: fixed;
	z-index: 1;
	left: 0%;
	top: 0%;
	width: 100%;
	height: 100vh;
	background-color: #2B2D42;
	transition: 2s;
}

.logo-header{
	position: absolute;
	top: 40%;
	left: 50%;
	transform: translate(-50%, -50%);
	color: #D9DCD6;
}

.logo{
	position: relative;
	display: inline-block;
	bottom: -20px;
	opacity: 0;
}

.logo.active{
	bottom: 0;
	opacity: 1;
	transition: ease-in-out 0.5s;
}

.logo.fade{
	bottom: 0;
	opacity: 0;
	transition: ease-in-out 1s;
}
@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins";
}

body{
    background-color:  #555770;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
.container{
    background-color: #f8f8f8;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 14px 14px 0 0 #000000;
    margin-top: 10px;
}
.startgame{
    display: grid;
    gap: 25px;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(1, 100px);
}
.startgame .card   {
    font-size: 1.2rem;
    user-select: none;
}
.card{
    text-align: center;
    cursor: pointer;
    font-size: 2rem;
}
.card div{
    width: 100px;
    height: 100px;
    line-height: 100px;
    color: black;
    background-color: #fff;
    border-radius: 10px;
    transition: all 500ms ease-out;
    backface-visibility: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, .1);
    position: absolute;
}
.startgame button{
    
    cursor: pointer;
    height: 40px;
    outline: none;
    border: none;
    border-radius: 5px;
    box-shadow:0 3px 10px rgba(0, 0, 0, .1); 
    color: #fff;
    background-color:  #555770;
}
.startgame .card.active div{
    border: 2px solid  #555770;
}
.card .back{
    transform: rotateY(-180deg);
}

.startgame .card:hover .front,
.card.flip .front{
    transform: rotateY(180deg);
}
.startgame .card:hover .back
,.card.flip .back{
    transform: rotateY(0deg);
}
.fa-repeat{
    font-size: 25px;
    margin-top: 1.5rem;
    cursor: ponter;
}
.playground{
    display: grid;
    gap: 20px;
    display: none;
}
.card.shake{
    animation: shake 0.35s ease-in-out;
}
@keyframes shake{
    0%,
    100%{
        transform: translateX(0);
    }
    20%{
        transform: translateX(-13px);
    }
    40%{
        transform: translateX(13px);
    }
    60%{
        transform: translateX(-8px);
    }
    80%{
        transform: translateX(8px);
    }

}
.card.match{
    animation: rubberBand 1s linear forwards;
}
@keyframes rubberBand {
     0%{
        transform: scaleX(1);
     }
     40%{
        transform: scaleX(1.12) scaleY(0.75);
     }
     55%{
        transform: scaleX(0.85) scaleY(1);
     }
     65%{
        transform:scaleX(1.09) scaleY(0.85);
     }
     75%{
        transform: scaleX(0.9) scaleY(0.95);
     }
     90%{
        transform: scaleX(1.05) scaleY(0.95);
     }
     100%{
        tranform: scaleX(1) scaleY(1)
     }
}