.card__wrap .main .card__img {
  width: 91vw;
  height: 91vw;
}
@media screen and (min-width: 436px) {
  .card__wrap .main .card__img {
    width: 313px;
    height: 313px;
  }
}
.card__wrap .restart {
  display: flex;
  width: 32px;
  position: absolute;
  top: 55px;
  left: 86%;
  cursor: pointer;
  z-index: 2;
}

.card__wrap-blocked .restart {
  display: none;
}
.markup-interactive {
  position: relative;
}

.text-confirm-answer {
  font-size: 0;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
}
.text-confirm-answer.transparent {
  opacity: 0;
  transition: all 250ms;
}
.for-float-wrapper .card__text {
  font-size: 18px;
  margin-bottom: 30px;
  text-align: start;
}
#body_pzl-classics .for-float-wrapper .intro__title-letter {
  margin-top: 7px;
}

.container {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  justify-content: center;
  /* position: relative; */
}
.starting-letter {
  display: flex;
  align-items: center;
  font-size: 34px;
  margin-right: 10px;
}

.card-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.card {
  font-size: 10vw;
  font-weight: bold;
  color: white;
  width: 16vw;
  height: 16vw;
  perspective: 1000px;
  cursor: pointer;
}
@media screen and (min-width: 436px) {
  .card {
    font-size: 35px;
    width: 50px;
    height: 50px;
  }
}
.card__item {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s;
  border-radius: 10px;
}

.front,
.back {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  backface-visibility: hidden;
  border-radius: 10px;
  background-color: var(--main-text-color);
}

.front {
  /* background: teal; */
}

.back {
  /* background: crimson; */
  transform: rotateX(180deg);
}

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

.equation {
  font-size: 33px;
  font-weight: 700;
  text-align: center;
  display: flex;
  width: 100%;
  margin: 0 auto;
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translate(-50%, -50%);
  justify-content: center;
}
.variable {
  margin-right: 10px;
}
.equal {
  margin-left: 7px;
  margin-right: 7px;
}
.value {
  color: var(--main-text-color);
}
.value.error {
  color: red;
}
.value.correct {
  color: #04b904;
}
.text-hint {
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  display: flex;
  width: 100%;
  margin: 0 auto;
  position: absolute;
  top: 9%;
  left: 50%;
  transform: translate(-50%, -50%);
  justify-content: center;
  transition: all 250ms;
}
.transparent {
  display: none;
}