body {
    min-height:100vh;
    min-width:100vw;
    background-color:lightblue;
    color:black;
}

h1 {
    text-align: center;
    font-weight: 300;
    font-size: xx-large;
}

p {
    text-align: center;
    font-size: large;
}

.actions {
    display: flex;
    justify-content: center;
}

.actions button {
    margin: 2%;
    padding: 8px 16px;
    font-size: 30px;
    border-radius: 10px;
    background-color: blue;
    color:white;
}

.actions button:disabled,
.actions button[disabled]{
  background-color:gray;
  color: lightgray;
}

.actions input {
    width: 5%;
}

.grid-container {
    display: grid;
    justify-content: center;
    gap: min(2vw,2vh);
    grid-template-columns: repeat(4, min(20vw,20vh));
    grid-template-rows: repeat(4, min(20vw,20vh));
}

.card {
    height: min(20vw,20vh);
    width: min(20vw,20vh);
    border-radius: min(2vw,2vh);
    background-color: white;
    position: relative;
    transform-style: preserve-3d;
    transition: all 0.5s ease-in-out;
}

.front-image {
    width: min(18vw,18vh);
    height: min(18vw,18vh);
}

.card.flipped {
    transform: rotateY(180deg);
}

.front,
.back {
    backface-visibility: hidden;
    position: absolute;
    border-radius: min(2vw,2vh);
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
}

.card .front {
    display: flex;
    justify-content: center;
    align-items: center;
    transform: rotateY(180deg);
}

.card .back {
    background-image: url("data:image/svg+xml,<svg id='patternId' width='100%' height='100%' xmlns='http://www.w3.org/2000/svg'><defs><pattern id='a' patternUnits='userSpaceOnUse' width='69.283' height='40' patternTransform='scale(2) rotate(0)'><rect x='0' y='0' width='100%' height='100%' fill='hsla(165, 27%, 77%, 1)'/><path d='M46.189-20L57.736 0M46.189 20l11.547 20m-46.189 0l11.547 20M11.547 0l11.547 20m40.415 30H40.415M28.868 30H5.774m23.094-40H5.774m57.735 20H40.415m0 20L28.868 50m11.547-60L28.868 10m46.188 0L63.509 30M5.774 10L-5.773 30m75.056 10H46.189L34.64 20 46.19 0h23.094C73.13 6.667 76.98 13.333 80.83 20zM57.736 60H34.64L23.094 40l11.547-20h23.095c3.848 6.667 7.698 13.333 11.547 20L57.736 60zm0-40H34.64L23.094 0l11.547-20h23.095L69.283 0c-3.87 6.7-8.118 14.06-11.547 20zM34.64 60H11.547L0 40l11.547-20h23.094L46.19 40 34.64 60zm0-40H11.547L0 0l11.547-20h23.094L46.19 0 34.64 20zM23.094 40H0l-5.773-10-5.774-10L0 0h23.094l11.547 20-11.547 20z'  stroke-width='1' stroke='hsla(284, 48%, 57%, 1)' fill='none'/></pattern></defs><rect width='800%' height='800%' transform='translate(0,0)' fill='url(%23a)'/></svg>");
    background-position: center center;
    background-size: cover;
    backface-visibility: hidden;
}