uccser/cs-field-guide

.container {
  max-width: 1220px !important; // To fit cards in groups of 8 on large screens
}
#interactive-binary-cards-container {
  display: flex;
  flex-wrap: wrap;
  position: relative;
  margin: -1rem;
}
@media (min-width: 815px) and (max-width: 1199px) {
  #interactive-binary-cards-container {
    width: 75%;
  }
}
#interactive-binary-cards-container div.binary-card-container {
  flex: 0 1 auto;
  margin: 1rem;
}
#interactive-binary-cards-container div.binary-card {
  width: 120px;
  height: 180px;
  position: relative;
  transform-style: preserve-3d;
  transform: perspective(25rem);
  transition: transform 0.6s;
  border: 1px solid #000000;
  text-align: center;
  box-shadow: 0 2px 5px 0 rgba(0,0,0,0.16),0 2px 10px 0 rgba(0,0,0,0.12);
  @supports (-moz-appearance: none) {
    backface-visibility: hidden;
  }
}
#interactive-binary-cards-container div.binary-card canvas {
  margin: 0;
  padding: 0;
  width: 118px;
  height: 118px;
}
#interactive-binary-cards-container div.binary-card.flipped {
  transform: rotateY(180deg);
}
#interactive-binary-cards-container div.binary-card-side {
  backface-visibility: hidden;
  position: absolute;
  left: 0;
  top: 0;
  margin: 0;
  width: 100%;
  height: 100%;
}
#interactive-binary-cards-container div.binary-card-front {
  z-index: 2;
  background: white;
  font-size: 1.5rem;
  font-weight: bold;
}
#interactive-binary-cards-container div.small-text {
  font-size: 1rem;
}
#interactive-binary-cards-container div.exponential-text {
  font-size: .5rem;
}
#interactive-binary-cards-container div.binary-card-back {
  background: black;
  transform: rotateY(180deg) perspective(25rem);
}
#interactive-binary-cards button {
  border: 1px solid #888;
}
#interactive-binary-cards button#flip-to-black {
  background: black;
  color: white;
}
#interactive-binary-cards button#flip-to-white {
  background: white;
  color: black;
}
h3, h5, p {
  text-align: left;
}
#dot-decimal-count {
  font-size: 3rem;
  font-weight: bold;
  color: #888;
}
#interactive-options {
  margin-top: 3rem;
}
.fraction {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: -0.5rem;

    span {
        font-size: 1rem;
    }
    span:last-child {
        border-top: 1px solid black;
    }
}