* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}
section {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 10px;
}
.cards {
  width: 60%;
  height: 90vh;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}
.card {
  width: 24%;
  height: 28vh;
  position: relative;
  cursor: pointer;
  perspective: 1000px;
  margin-top: 10px;
}
.first__card {
  width: 180px;
  height: 100%;
  position: absolute;
  visibility: hidden;
  transform: rotateY(180deg);
}
.card img {
  width: 180px;
  height: 100%;
  position: absolute;
}

.second__card {
  width: 180px;
  height: 100%;
  background-color: rgb(197, 194, 194);
  position: absolute;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 100px;
  color: rgb(69, 105, 79);
}
.card.flip .first__card {
  visibility: inherit;
  transform: rotateY(0deg);
  transition: transform 0.5s ease-out, 1s ease-out;
}
.card.flip .second__card {
  transform: rotateY(-180deg);
  transition: transform 0.5s ease-out, 1s ease-out;
  opacity: 0;
}

.disabled {
  pointer-events: none;
  display: block;
}
.bottom {
  width: 90%;
  height: 10vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.5rem;
}
.timer {
  width: 180px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgb(80, 103, 87);
}
.time {
  font-weight: bold;
  color: black;
}
.reset {
  width: 220px;
  height: 60px;
  border-radius: 10px;
  letter-spacing: 0.1rem;
  text-transform: uppercase;
  border: none;
  background-color: rgb(80, 103, 87);
  color: wheat;
  font-size: 1.5rem;
  cursor: pointer;
}
.score {
  height: 60px;
  width: 180px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgb(80, 103, 87);
}
.total {
  font-weight: bold;
  color: black;
}

.modal {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  /* background: rgba(77, 77, 77, 0.7); */
  transition: all 0.4s;
}

.modal:target {
  visibility: visible;
  opacity: 1;
}

.modal__content {
  border-radius: 4px;
  position: relative;
  width: 500px;
  max-width: 90%;
  background: #fff;
  padding: 1em 2em;
  display: flex;
  flex-direction: column;
  align-items: center;
  h1 {
    span {
      color: rgb(135, 27, 27);
    }
  }
}

.modal__close {
  position: absolute;
  top: 10px;
  right: 10px;
  color: #585858;
  text-decoration: none;
}
.modal button {
  width: 30%;
  height: 30px;
  border-radius: 4px;
  background-color: green;
  text-transform: uppercase;
  text-align: center;
  border: none;
  color: white;
  font-size: 1rem;
  cursor: pointer;
}
.finished {
  width: 100%;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  span {
    color: rgb(135, 27, 27);
  }
}

/* Responsive Design */

@media screen and (max-width: 768px) {
    section{
        width: 100%;
        height: auto;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
  .cards {
    width: 80%;
    display: flex;
    justify-content: space-between;
    height: auto;
  }

  .card {
    width: 43%;
    height: 125px;
  }
  .bottom{
    height: 40px;
    width: 80%;
    font-size: 18px;
    gap: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.reset{
    width: 110px;
    height: 40px;
    gap: 20px;
    font-size: 1rem;
}
}