html, body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Helvetica, Arial, sans-serif;
}

.header__wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 70px;
  margin: auto;
}

.menu__item {
  margin-right: 10px;
  color: black;
  text-decoration: none;
}

.menu__item:last-of-type {
  margin-right: 0;
}

.transform {
  background-color: #000;
  color: #fff;
}

.transform__wrapper {
  width: 490px;
  margin: auto;
  padding: 50px 0;
}

.title {
  margin: 0;
  line-height: 56px;
  font-size: 54px;
}

.subtitle {
  line-height: 19px;
  font-size: 14px;
  margin-top: 35px;
  margin-bottom: 55px;
  max-width: 385px;
}

.demo {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.demo__item {
  background-color: #202020;
  width: 240px;
  height: 240px;
  margin-right: 10px;
  margin-top: 10px;
  display: flex;
  position: relative;
}

.demo__icon {
  margin: auto;
}

.demo__item:nth-of-type(2n) {
  margin-right: 0;
}

.demo__item:first-of-type, .demo__item:nth-of-type(2) {
  margin-top: 0;
}

.demo__item:hover {
  background-color: #02B341;
}

.demo__item-title {
  font-size: 24px;
  position: absolute;
  bottom: 15px;
  left: 15px;
  margin: 0;
}

.demo__item_translate:hover .demo__icon {
  transform: translate(10px, 0);
}