html, body {
    height: 100%;
}

body {

    font-family: 'Poppins', sans-serif;
    text-align: center;
    background: rgb(148, 219, 247);
}

ul {
    margin:0;
    padding: 0;
}  

ul li { 
    list-style: none;
}

h1 {
    margin: 0;
    line-height: 1.5;
    color: white;
}

#game-container {

    border: 2px solid black;
    border-radius: 6px;
    padding: 10px;
    max-width: 100%;
    margin: 0 auto;
    background: rgb(64, 64, 247);
    display: inline-block;
    box-shadow: 10px 10px 5px 0;

}

#game-container header {

    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;

}

#dashboard {
    background: rgb(148, 219, 247);
    margin: 10px 0 0;
    padding: 5px 10px;
    border-radius: 100vw;
    font-weight: bold;
}

#dashboard li {
    display: inline-block;
}

#dashboard li span {
    margin: 0 10px 0 0;
}

#dashboard li:last-child span {
    margin: 0;
}

#board {
    display: grid;
    grid-template-columns: repeat(4, 80px);
    grid-template-rows: 80px;
    grid-auto-rows: 80px;
    gap: 10px;
    margin: 15px 0;
}

#board.compare {
  pointer-events: none;
}

#board li {
    border: 2px solid black;
    border-radius: 6px;
    background-color: white;
    cursor: pointer;
    transform: rotateY(180deg);
    /* transform-style: preserve-3d; */
    font-size: 0;
    transition: transform 300ms;
    background-size: cover;
  
}

#board li img {
    width: 100%;
    height: 100%;
    visibility: hidden;
    opacity: 0;
    transition: opacity 300ms, visibility 300ms;


}

#board li.open,
#board li.flip  {
    transform: rotateY(0deg);
    pointer-events: none;
}

#board li.open img,
#board li.flip img{
    visibility: visible;
    opacity: 1;
}

#restart {
    font-family: 'Poppins', sans-serif;
    margin: 0 0 5px 0;
    outline: none;
    border: none;
    font-size: 20px;
    border-radius: 6px;
    font-weight: bold;
    color: white;
    background: rgb(13, 13, 77);
    cursor: pointer;
    padding: 5px 18px;
    transition: transform 100ms;

}

#restart:hover {
    transform: translateY(-4px);

}