.principle {
  padding-bottom: calc(10vw + 10px);
  position: relative;
  overflow: hidden;
}

.principle__container {
  padding: 5rem 10rem;
  position: relative;
  transition: transform 1s ease;
}

@media (max-width: 767px) {
  .principle__container {
    padding: 4rem 2rem;
  }
}

.principle__container::before {
  content: '';
  position: absolute;
  bottom: 3rem;
  left: 3rem;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background-color: #7d5e13;
  z-index: -5;
}

@media (max-width: 767px) {
  .principle__container::before {
    bottom: 1rem;
    left: 1rem;
    width: 120px;
    height: 120px;
  }
}

.principle__container::after {
  content: '';
  position: absolute;
  top: 3rem;
  right: 3rem;
  width: 200px;
  height: 200px;
  transform: rotateZ(15deg);
  background-color: #999999;
  z-index: -5;
}

@media (max-width: 767px) {
  .principle__container::after {
    top: 3rem;
    right: 1rem;
    width: 120px;
    height: 120px;
  }
}

.principle::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: -10;
  border-bottom: 10vw solid #222220;
  border-left: 100vw solid transparent;
}

@media (max-width: 767px) {
  .principle__text {
    font-size: 0.9rem;
  }
}