<div class="page">
  <div class="field field_v1">
    <label for="first-name" class="ha-screen-reader">First name</label>
    <input id="first-name" class="field__input" placeholder="e.g. Stanislav">
    <span class="field__label-wrap" aria-hidden="true">
      <span class="field__label">First name</span>
    </span>
  </div>
  <div class="field field_v2">
    <label for="last-name" class="ha-screen-reader">Last name</label>
    <input id="last-name"  class="field__input" placeholder="e.g. Melnikov">
    <span class="field__label-wrap" aria-hidden="true">
      <span class="field__label">Last name</span>
    </span>
  </div>    
  <div class="field field_v3">
    <label for="email" class="ha-screen-reader">E-mail</label>
    <input id="email" class="field__input" placeholder="e.g. melnik909@ya.ru">
    <span class="field__label-wrap" aria-hidden="true">
      <span class="field__label">E-mail</span>
    </span>
  </div>
</div>
<div class="linktr">
  <a href="https://linktr.ee/melnik909" target="_blank" class="linktr__goal r-link">Get more things from me 💪💪💪</a>
</div>

/*
=====
HELPERS
=====
*/

.ha-screen-reader{
  width: var(--ha-screen-reader-width, 1px);
  height: var(--ha-screen-reader-height, 1px);
  padding: var(--ha-screen-reader-padding, 0);
  border: var(--ha-screen-reader-border, none);

  position: var(--ha-screen-reader-position, absolute);
  clip: var(--ha-screen-reader-clip, rect(1px, 1px, 1px, 1px));
  overflow: var(--ha-screen-reader-overflow, hidden);
}

/*
=====
RESET STYLES
=====
*/

.field__input{ 
  --uiFieldPlaceholderColor: var(--fieldPlaceholderColor, #767676);
  
  background-color: transparent;
  border-radius: 0;
  border: none;

  -webkit-appearance: none;
  -moz-appearance: none;

  font-family: inherit;
  font-size: inherit;
}

.field__input:focus::-webkit-input-placeholder{
  color: var(--uiFieldPlaceholderColor);
}

.field__input:focus::-moz-placeholder{
  color: var(--uiFieldPlaceholderColor);
}

/*
=====
CORE STYLES
=====
*/

.field{
  --uiFieldBorderWidth: var(--fieldBorderWidth, 2px);
  --uiFieldPaddingRight: var(--fieldPaddingRight, 1rem);
  --uiFieldPaddingLeft: var(--fieldPaddingLeft, 1rem);   
  --uiFieldBorderColorActive: var(--fieldBorderColorActive, rgba(22, 22, 22, 1));

  display: var(--fieldDisplay, inline-flex);
  position: relative;
  font-size: var(--fieldFontSize, 1rem);
}

.field__input{
  box-sizing: border-box;
  width: var(--fieldWidth, 100%);
  height: var(--fieldHeight, 3rem);
  padding: var(--fieldPaddingTop, 1.25rem) var(--uiFieldPaddingRight) var(--fieldPaddingBottom, .5rem) var(--uiFieldPaddingLeft);
  border-bottom: var(--uiFieldBorderWidth) solid var(--fieldBorderColor, rgba(0, 0, 0, .25));  
}

.field__input:focus{
  outline: none;
}

.field__input::-webkit-input-placeholder{
  opacity: 0;
  transition: opacity .2s ease-out;
}

.field__input::-moz-placeholder{
  opacity: 0;
  transition: opacity .2s ease-out;
}

.field__input:focus::-webkit-input-placeholder{
  opacity: 1;
  transition-delay: .2s;
}

.field__input:focus::-moz-placeholder{
  opacity: 1;
  transition-delay: .2s;
}

.field__label-wrap{
  box-sizing: border-box;
  pointer-events: none;
  cursor: text;

  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

.field__label-wrap::after{
  content: "";
  box-sizing: border-box;
  width: 100%;
  height: 0;
  opacity: 0;

  position: absolute;
  bottom: 0;
  left: 0;
}

.field__input:focus ~ .field__label-wrap::after{
  opacity: 1;
}

.field__label{
  position: absolute;
  left: var(--uiFieldPaddingLeft);
  top: calc(50% - .5em);

  line-height: 1;
  font-size: var(--fieldHintFontSize, inherit);

  transition: top .2s cubic-bezier(0.9, -0.15, 0.1, 1.15), opacity .2s ease-out, font-size .2s ease-out;
  will-change: bottom, opacity, font-size;
}

.field__input:focus ~ .field__label-wrap .field__label,
.field__input:not(:placeholder-shown) ~ .field__label-wrap .field__label{
  --fieldHintFontSize: var(--fieldHintFontSizeFocused, .75rem);

  top: var(--fieldHintTopHover, .25rem);
}

/* 
effect 1
*/

.field_v1 .field__label-wrap::after{
  border-bottom: var(--uiFieldBorderWidth) solid var(--uiFieldBorderColorActive);
  transition: opacity .2s ease-out;
  will-change: opacity;
}

/* 
effect 2
*/

.field_v2 .field__label-wrap{
  overflow: hidden;
}

.field_v2 .field__label-wrap::after{
  border-bottom: var(--uiFieldBorderWidth) solid var(--uiFieldBorderColorActive);
  transform: translate3d(-105%, 0, 0);
  will-change: transform, opacity;
  transition: transform .285s ease-out .2s, opacity .2s ease-out .2s;
}

.field_v2 .field__input:focus ~ .field__label-wrap::after{
  transform: translate3d(0, 0, 0);
  transition-delay: 0;
}

/*
effect 3
*/

.field_v3 .field__label-wrap::after{
  border: var(--uiFieldBorderWidth) solid var(--uiFieldBorderColorActive);
  will-change: opacity, height;
  transition: height .2s ease-out, opacity .2s ease-out;
}

.field_v3 .field__input:focus ~ .field__label-wrap::after{
  height: 100%;
}

/*
=====
LEVEL 4. SETTINGS
=====
*/

.field{
  --fieldBorderColor: #D1C4E9;
  --fieldBorderColorActive: #673AB7;
}

/*
=====
DEMO
=====
*/

body{
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Open Sans, Ubuntu, Fira Sans, Helvetica Neue, sans-serif;
  margin: 0;

  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page{
  box-sizing: border-box;
  width: 100%;
  max-width: 480px;
  margin: auto;
  padding: 1rem;

  display: grid;
  grid-gap: 30px;
}

.linktr{
  order: -1;
  padding: 1.75rem;
  text-align: center;
}

.linktr__goal{
  background-color: rgb(209, 246, 255);
  color: rgb(8, 49, 112);
  box-shadow: rgb(8 49 112 / 24%) 0px 2px 8px 0px;
  border-radius: 2rem;
  padding: .5rem 1.25rem;
}

@media (min-width: 1024px){
  
  .linktr{
    position: absolute; 
    right: 1rem; 
    bottom: 1rem;
  }
}

.r-link{
    --uirLinkDisplay: var(--rLinkDisplay, inline-flex);
    --uirLinkTextColor: var(--rLinkTextColor);
    --uirLinkTextDecoration: var(--rLinkTextDecoration, none);

    display: var(--uirLinkDisplay) !important;
    color: var(--uirLinkTextColor) !important;
    text-decoration: var(--uirLinkTextDecoration) !important;
}