JSFiddle - React, Tailwind, and code Playground

by Jim_Toth

HTML

<div class="container">

    <h1>Section Name <small>Some Detales About the section</small></h1>

    <form>

        <div class="group">      
            <input type="text" value="font-family: 'Source Sans Pro', sans-serif;" required>
            <span class="highlight"></span>
            <span class="bar"></span>
            <label>Main Font Family</label>
        </div>

        <div class="group">      
            <input type="text" required>
            <span class="highlight"></span>
            <span class="bar"></span>
            <label>Headlines Font Family</label>
            <p>(Optional) Blank Field will make Headlines get the Main Font Family.</p>
        </div>
            
                    <div class="group">      
            <input type="text" value="font-family: 'Source Sans Pro', sans-serif;" required>
            <span class="highlight"></span>
            <span class="bar"></span>
            <label>Main Font Family</label>
        </div>

        <div class="group">      
            <input type="text" required>
            <span class="highlight"></span>
            <span class="bar"></span>
            <label>Headlines Font Family</label>
            <p>(Optional) Blank Field will make Headlines get the Main Font Family.</p>
        </div>

    </form>

</div>

CSS

* { box-sizing:border-box; }

/* basic stylings ------------------------------------------ */
body{ background:#E4E4E4; }

.container{ 
  font-family:'Roboto';
  width:80%; 
  margin:30px auto 0; 
  display:block; 
  background:#FFF;
  padding:10px 50px 50px;
}

h1{ 
  text-align:center; 
  margin-bottom:50px; 
}

h1 small{ 
  font-weight:normal; 
  color:#888; 
  display:block;
    font-size:15px;
}


/* form starting stylings ------------------------------- */
.group{ 
  position:relative; 
  margin-bottom:60px; 
}

.group input{
  font-size:18px;
  padding:10px 10px 10px 5px;
  display:block;
  width:100%;
  border:none;
  border-bottom:1px solid #757575;
}

.group input:focus{ outline:none; }

.group p{
    margin: 6px 0 0 2px;
    font-size: 12px;
    color: #D4852E;
}

/* LABEL ======================================= */
label{
  color:#999; 
  font-size:18px;
  font-weight:normal;
  position:absolute;
  pointer-events:none;
  left:5px;
  top:10px;
  transition:0.2s ease all; 
  -moz-transition:0.2s ease all; 
  -webkit-transition:0.2s ease all;
}

/* active state */
input:focus ~ label, input:valid ~ label{
  top:-20px;
  font-size:14px;
  color:#5264AE;
}

/* BOTTOM BARS ================================= */
.bar{ position:relative; display:block; width:100%; }
.bar:before, .bar:after{
  content:'';
  height:2px; 
  width:0;
  bottom:1px; 
  position:absolute;
  background:#5264AE; 
  transition:0.2s ease all; 
  -moz-transition:0.2s ease all; 
  -webkit-transition:0.2s ease all;
}
.bar:before{
  left:50%;
}
.bar:after{
  right:50%; 
}

/* active state */
input:focus ~ .bar:before, input:focus ~ .bar:after{width:50%;}

/* HIGHLIGHTER ================================== */
.highlight {
  position:absolute;
  height:60%; 
  width:100px; 
  top:25%; 
  left:0;
  pointer-events:none;
  opacity:0.5;
}

/* active state */
input:focus ~ .highlight {
  -webkit-animation:inputHighlighter 0.3s ease;
  -moz-animation:inputHighlighter 0.3s ease;
 ...