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HTML 

              
                <div class="container">
  <form action="" methot="post" class="fk-form">
    <div class="row">
      <div class="col-sm-6">
        <div class="form-group">
          <label>
            <span class="f-title">Name:</span>
            <span class="f-input">
              <input type="text" required>
            </span>
          </label>
        </div>
      </div>
      <div class="col-sm-6">
        <div class="form-group">
          <label>
            <span class="f-title">E-mail:</span>
            <span class="f-input">
              <input type="email" required>
            </span>
          </label>
        </div>
      </div>
    </div>
    
    <div class="form-group">
      <label>
        <span class="f-title">Telephone:</span>
        <span class="f-input">
          <input type="text" required>
        </span>
      </label>
    </div>
    
    <div class="form-group">
      <label>
        <span class="f-title">Message:</span>
        <span class="f-input">
          <textarea name="message" id="message" cols="30" rows="5" required></textarea>
        </span>
      </label>
    </div>
    
    <div class="form-group">
      <button type="submit">Submit</button>
    </div>
    
  </form>
</div>
!

CSS 

              
                body
  padding: 30px
  
  //form inputs
.fk-form
  .focus
    .f-title
      color: #ff2c5f
      position: relative
      top: -12px
      left: -6px
      transition: all ease .3s
      
    .f-input
      &:after
        content: ''
        display: block
        border: 4px solid #15151a
        z-index: 1
        transition: all ease .3s
        left: -6px
        top: -12px
        bottom: 12px
        right: 6px
  
  label
    width: 100%
  
  .f-title
    color: #15151a
    display: block
    font-weight: 600
    font-size: 19px
    position: relative
    left: 0
    top: 0
    transition: all ease .3s
    
  .f-input
    position: relative
    display: block
    z-index: 1
    
    &:after
      content: ''
      display: block
      border: 4px solid #ddd
      position: absolute
      left: 0
      top: 0
      right: 0
      bottom: 0
      transition: all ease .3s
      
    input, textarea
      background: #eeeeee
      border: 0
      padding: 20px 30px
      outline: 0
      font-size: 16px
      color: #494949
      width: 100%
      
//form button
button
  border: 0
  position: relative
  z-index: 1
  color: #FFF
  padding: 20px 40px
  outline: 0
  font-size: 18px
  font-weight: 600
  cursor: pointer
  
  &:hover
    &:after
      transition: all 0.3s ease
      position: absolute
      top: 0
      left: 0
      width: 100%
      height: 100%
  
    &:before
      transition: all 0.3s ease
      position: absolute
      top: 0
      left: 0
  
  &:before
    content: ''
    width: 100%
    height: 100%
    background: #ff2c5f
    position: absolute
    top: 5px
    left: 5px
    right: 0
    bottom: 0
    z-index: -1
    transition: all 0.3s ease
  
  &:after
    content: ''
    border: 4px solid #15151a
    width: -moz-calc(100% - 1px)
    width: -webkit-calc(100% - 1px)
    width: -o-calc(100% - 1px)
    width: calc(100% - 1px)
    height: -moz-calc(100% - 2px)
    height: -webkit-calc(100% - 2px)
    height: -o-calc(100% - 2px)
    height: calc(100% - 2px)
    position: absolute
    top: -5px
    left: -5px
    right: 0
    bottom: 0
    z-index: -1
    transition: all 0.3s ease
!

JS 

              
                $('.f-input input, .f-input textarea').focus(function(){
  $(this).parents('label').addClass('focus');
});

$('.f-input input, .f-input textarea').blur(function(){
  $(this).parents('label').removeClass('focus');
});
!
999px

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