styles.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  font-size: 16px;
}

body {
  height: 100vh;
  background-color: rgb(26, 26, 26);
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.container {
  display: flex;
  flex-direction: column;
  height: 70vh;
  margin-top: 20px;
  margin-left: 70px;
  justify-content: space-evenly;

  align-items: center;
}

.container h1 {
  color: white;
  font-size: 55px;
}

.container h2 {
  margin-bottom: 7px;
}

.scoreBoard {
  color: white;
  background-color: #d8bfd8;
  width: 25rem;
  height: 15.625rem;
  display: flex;
  border-radius: 20px;
  flex-direction: column;
  justify-content: center;
  padding: 1.25rem;
  align-items: center;
}

.scoreBoard button {
  outline: none;
  cursor: pointer;
  border: none;
  padding: 10px;
  width: 40%;
  margin-top: 10px;
  border-radius: 20px;
  background-color: #845488;
  font-size: 18px;
  font-weight: 600;
  color: white;
}

.board {
  width: 44rem;
  height: 720px;
  display: flex;
  flex-wrap: wrap;
  margin: auto;
  perspective: 1000px;
}

.card {
  width: 23%;
  height: 28%;
  position: relative;
  margin: 7px;
  transform: scale(1);
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.5s;
}

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

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

.front,
.back {
  padding: 20px;
  border-radius: 10px;
  position: absolute;
  backface-visibility: hidden;
}

.back {
  width: 100%;
  height: 100%;
  padding: 0;
}
.front {
  width: 100%;
  height: 100%;
  background-color: white;
  transform: rotateY(180deg);
}