styles.css

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

body {
  height: 100vh; /*viewport height*/
  display: flex;
  background: #2b2b30;
  flex-direction: column;
}

.card-game {
  width: 450px;
  height: 450px;
  margin: auto;
  display: flex;
  flex-wrap: wrap;
  perspective: 1000px;
  

}

.memory-card {
  width: calc(25% - 10px);
  height: calc(33.333% - 10px);
  margin: 5px;
  position: relative;
  transform: scale(1);
  transform-style: preserve-3d;
  transition: transform 0.5s;
  box-shadow: 5px 5px 4px rgba(223, 123, 69, 0.4);
}

.memory-card:active {
  transform: scale(0.97);
  transition: transform 0.2s;
}

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

.back-face {
  width: 100%;
  height: 100%;
  position: absolute;
  border-radius: 5px;
  background: #ff7300;
  backface-visibility: hidden;
}

.front-face {
  transform: rotateY(180deg);
  width: 100%;
  height: 100%;
  position: absolute;
  border-radius: 5px;
  background: #ff7300;
  backface-visibility: hidden;
  object-fit: cover;
}

button {
  color: black;
  background-color: #ff4c06;
  padding: 8px;
  border-radius: 7px;
  font-size: 15px;
  font-family: cursive;
}

button:hover {
  color: #ff4000;
  background: #2b2b30;
  box-shadow: 6px 6px 6px rgba(223, 123, 69, 0.5);
}


/*
.button {
  margin-bottom: 40px;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  text-align: center;
}
*/

.button {
    margin: auto;

    margin-top: 15px;

}