:root {
    --primary: #80b7a2;
    --light: #80b000;
    --backcolor: #f4d7e7;
    --frontcolor: yellow;
    --white: #fff;
    --shadow: 0 1px 5px rgba(104, 104, 104, .8);
}

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

body {
    background: url(./img/bgF.svg) no-repeat center center fixed;
    background-size: cover;
}

#obj {
    position: absolute;
    width: 70%;
    height: 70%;
    top: 10%;
    left: 15%;
}

.st0 {
    cursor: pointer;
}

.gameBoard {
    padding: 10%;
    visibility: hidden;
    display: grid;
    grid-gap: 10px;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.card {
    margin: 5px;
    min-width: 0%;
    perspective: 600px;
    -webkit-perspective: 600px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.faces {
    width: 120px;
    height: 120px;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
}

.face {
    width: 100%;
    height: 100%;
    border: 5px solid var(--white);
    border-radius: 16px;
    position: absolute;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    box-shadow: var(--shadow);
}

.front>* {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.front {
    background-color: var(--frontcolor);
}

.back {
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg);
}

#win {
    position: absolute;
    visibility: hidden;
    top: -5%;
}

#title {
    position: absolute;
    width: 60%;
    top: 10%;
    left: 50%;
    transform: translate(-50%);
}