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

body {
    height: 100vh;
    display: flex;
    background: #060AB2
}

.aaa {
    display: flex;
    flex-direction: column;
    margin: auto;  /*here */
}

.info {
    margin-top: 2%;
    position: relative;
   
}
.start {
    padding: 2%;
 }
 
.result {
    margin-left: 2%;
    color: white;
    float:right;
    padding: 2%;

}
.memory-game {
    width: 640px;
    height: 640px;
    display: flex;
    flex-wrap: wrap;
    border: 2px solid lime;
    perspective: 1000px;
}

.memory-card {
    width: calc(25% - 10px);
    height: calc(33.333% - 10px);
    margin: 5px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform .5s;
 
}

.memory-card:active {
    transform: scale(.97);
    transition: transform .2s
}

.memory-card.flip {
    transform:rotateY(180deg);
  
}

.front-face, 
.back-face {
    width: 100%;
    height: 100%;
    padding: 20px;
    position: absolute;
    border-radius:5px;
    background: #1c7ccc;
    backface-visibility: hidden;
}

.front-face {
    transform: rotateY(180deg);
    /*backface-visibility:hidden*/
   
}




img {
    width:100px;
}