html,
body {
  width: 100%;
  height: 100%;
  font-family: Kanit;
  color: white;
  margin: 0;
  font-size: 19px;
}

body {
  display: flex;
  justify-content: center;
  background: #1d1d1d;
  overflow: hidden;
}
.wrapper {
  width: 100%;
  height: calc(100% - 50px);
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: black;
}

.box {
  width: 75px;
  height: 75px;
  border-radius: 12px;
  background: #43a047;
  position: absolute;
}

.nav {
  position: fixed;
  height: 50px;
  background: rgba(0, 0, 0, 0.4);
  bottom: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}