.inputBox {
  position: relative;
  width: 250px;
  padding-top: 2%;
  padding-bottom: 2%;
}

.inputBox input {
  width: 100%;
  padding: 10px;
  border: 1px solid rgba(0, 180, 174, 0.16);
  background: var(--second-leading-color);
  border-radius: 5px;
  outline: none;
  color: white;
  font-size: 1em;
  transition: 0.5s;
}

.inputBox span {
  position: absolute;
  left: 0;
  padding: 10px;
  pointer-events: none;
  font-size: 1em;
  color: var(--third-leading-color);
  text-transform: uppercase;
  transition: 0.5s;
}

.inputBox input:focus ~ span,
.inputBox input:focus ~ span {
  color: var(--third-leading-color);
  transform: translateX(10px) translateY(-7px);
  font-size: 0.65em;
  padding: 0 10px;
  background: var(--second-leading-color);
  border-left: 1px solid var(--third-leading-color);
  border-right: 1px solid var(--third-leading-color);
  letter-spacing: 0.2em;
}

.inputBox input:valid,
.inputBox input:focus {
  border: 1px solid var(--third-leading-color);
}