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JavaScript

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HTML 

              
                .form-card
  .avatar
  form.material
    .material-input
      label Username
      input(type="text")
    .material-input
      label Email
      input(type="text")
    .material-input
      label Password
      input(type="password")
    .material-input
      label Confirm Password
      input(type="password")
  .buttons
    button.cancel Cancel
    button.update Create Account
!

CSS 

              
                @mixin hoverize($color)
  background: desaturate($color, 25%)

body
  font-family: 'Quattrocento Sans', sans-serif
  font-size: 16px
  width: 100%
  height: 100%
  min-height: 100vh
  display: flex
  justify-content: center
  align-items: center
  background:
    image: linear-gradient(30deg, RoyalBlue, pink)
    size: cover

.form-card
  background: white
  padding: 4rem 2rem
  width: 60%
  @media only screen and (max-width: 680px)
    width: 70%
  max-width: 460px
  box-shadow: 0 8px 22px transparentize(black, 0.60)
  position: relative
  border-radius: 12px
  margin-top: 30px
  
.avatar
  position: absolute
  top: -50px
  left: 50%
  width: 100px
  height: 100px
  background: white
  margin-left: -60px
  box-shadow: 0 12px 12px transparentize(black, 0.75)
  border: 5px solid white
  border-radius: 50%
  background:
    image: url('https://images.unsplash.com/photo-1494790108377-be9c29b29330?ixlib=rb-0.3.5&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=200&fit=max&s=707b9c33066bf8808c934c8ab394dff6')
    position: center -18px
    repeat: no-repeat
    size: 110px
    
form.material
  position: relative
  padding-bottom: 40px
  
.material-input
  position: relative
  padding-top: 20px
  transition: all .15s ease-out
  width: 90%
  margin: 0 auto 20px
  
  label
    position: absolute
    pointer-events: none
    left: 4px
    top: 20px + 6px
    color: darkgray
    transform: scale(1.1)
    transition: all .15s ease-out
    
  input
    border: none
    width: 100%
    color: darken(DarkGray, 45%)
    border-bottom: 2px solid darkgray
    padding: 6px 4px
    outline: none
    transition: all .15s ease-out
    
  &.materialize
    input
      border-bottom: 2px solid crimson
    label
      top: 0
      left: 0
      color: crimson
      transform: scale(0.95)

.buttons
  position: absolute
  width: 100%
  bottom: 0
  left: 0
  display: flex
  justify-content: space-between
  
  & button
    padding: 20px
    margin: 0
    width: 50%
    color: white
    text-shadow: 0 0 8px transparentize(black, 0.5)
    border: none
    cursor: pointer
    
    transition: all 0.25s ease-in-out
    
    &.cancel
      background: Crimson
      border-bottom-left-radius: 8px
      
      &:hover
        @include hoverize(Crimson)
      
    &.update
      background: LimeGreen
      border-bottom-right-radius: 8px
      
      &:hover
        @include hoverize(LimeGreen)
!

JS 

              
                const form = document.querySelector('form')
const materialInputs = form.querySelectorAll('.material-input > input')

function materialize() {
  this.parentElement.classList.add('materialize')
}

function dematerialize() {
  if (this.value === '')
    this.parentElement.classList.remove('materialize')
}

materialInputs.forEach(input => {
  input.addEventListener("focus", materialize)
  input.addEventListener("blur", dematerialize)
});
!
999px

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