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

body {
  height: 100vh;
  display: flex;
  background: #060AB2;
}
/* gumbi(buttons) */

.gumbi input{
  background-color: #ffffff;
  border: 2px solid #000000;
  border-radius: 8px;
  color: black;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;

}

/* konec gumbov(end of buttons) */
.memory-game {
  width: 640px;
  height: 640px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
  perspective: 1000px;
}

.memory-card {
    width: calc(25% - 10px);
    height: auto;
    margin: 1px;
    position: relative;
    transform: scale(1);
    transform-style: preserve-3d;
    transition: transform .5s;
    box-shadow: 1px 1px 1px rgb(0 0 0 / 30%);
    border-radius: 5px;
    background: #1C7CCC;
    display: flex;
    align-items: center;
}



.memory-card:active {
  transform: scale(0.97);
  transition: transform .2s;
}

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

.front-face, .back-face {
    width: 100%;
    position: absolute;
    backface-visibility: hidden;
  
}

.front-face {
    transform: rotateY(180deg);
    padding: 20px;
    
}