*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: monospace;

}

body
{
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: #0a3c2f;
}

.container{
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #0d614b;
    gap: 30px;
    flex-direction: column;
    padding: 40px 60px;
}

h2{
    font-size: 3em;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.1em;

}
.reset{
    padding: 15px 20px;
    color:  #267c65;
    background: #fff;
    border: none;
    font-size: 1.5em;
    letter-spacing: uppercase;
    cursor: pointer;
    font-weight: 600;
}

.reset:focus
{
    color: #fff;
    background-color: #267c65;

}


.game{
  width: 433px;
  height: 430px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  transform-style: preserve-3d;
  perspective: 500px;
}


 .item{
    position: relative;
    width: 100px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    font-size: 3em;
    /* transition: 0.25ms; */
    transform: rotateY(180deg); 
    transition: transform 0.5s;

}


/* .item.boxOpen {
    transform: rotateY(0deg);
    
 } */


.item::after
{
 content: '';
 position: absolute;
 inset: 0;
 background: #209d7b;
 /* transition: 0.25s;
 transform: rotateY(0deg); */
 opacity: 1;  /* Start hidden */
 visibility: visible; /* Not visible initially */
 transition: opacity 0.5s, visibility 0.25s;

}

.item.boxOpen::after,
.item.boxMatch::after {
    opacity: 0; /* Make visible */
    visibility: hidden; /* Make visible */
}

.item.boxOpen {
    transform: rotateY(0deg); /* Rotate to show the emoji */
}

.boxOpen:after,
.boxMatch:after
 {
    transform: rotateY(180deg);
}