Animated Floating Input Placeholder In Pure CSS

A pure CSS implementation of the float label pattern that moves the placeholder to the top of the input field while typing. Inspired by Gmail login page.

How to use it:

1. Add a placeholder to your input field as follows:

<div class="input-block">
  <input type="text" name="input-text" id="input-text" required spellcheck="false">
  <span class="placeholder">
    Placeholder
  </span>
</div>

2. The required CSS styles for the animated placeholder label.

div.input-block {
  position: relative;
}
div.input-block input {
  font-weight: 500;
  font-size: 1.6rem;
  color: #495055;
  width: 350px;
  padding: 15px 15px;
  border-radius: 1rem;
  border: 2px solid  #D9D9D9;
  outline:none;
}
div.input-block span.placeholder {
  position: absolute;
  margin: 17px 0;
  padding: 0 4px;
  font-family: Roboto, sans-serif;
  color:  #6c757d;
  display: flex;
  align-items: center;
  font-size: 1.6rem;
  top: 0;
  left: 17px;
  transition: all 0.2s;
  transform-origin: 0% 0%;
  background: none;
  pointer-events: none;
}
div.input-block input:valid + span.placeholder,
div.input-block input:focus + span.placeholder {
  transform: scale(0.8) translateY(-30px);
  background: #fff;
}
div.input-block input:focus{
  color: #284B63;
  border-color: #284B63;
}
div.input-block input:focus + span.placeholder {
  color: #284B63;
}