html, body {
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: gray;
}

input {
  background: white;
}

.color::placeholder {
  transition: color ease 0.2s;
  color: transparent;
}

.color:ms-input-placeholder {
  transition: color ease 0.2s;
  color: transparent;
}

.color:focus::placeholder {
  color: #a9a9a9;
}

.color:focus:ms-input-placeholder {
  color: #a9a9a9;
}

.opacity::placeholder {
  transition: opacity ease 0.2s;
  opacity: 0;
}

.opacity:ms-input-placeholder {
  transition: opacity ease 0.2s;
  opacity: 0;
}

.opacity:focus::placeholder {
  opacity: 1;
}

.opacity:focus:ms-input-placeholder {
  opacity: 1;
}