Material input - css: http://codepen.io/kyleparisi/pen/WxyAOW

input.css

* { box-sizing:border-box; }

/* form starting stylings ------------------------------- */
.group 	{
    position:relative;
    margin-top:2em;
}
input 				{
    font-size:18px;
    padding:10px 10px 10px 5px;
    display:block;
    border:none;
    border-bottom:1px solid #757575;
    background-color: #11171b;
    width: 100%;
    color: white;
    -webkit-box-shadow: 0 0 0px 1000px #11171b inset;
}
input:focus {
    outline:none;
}

/* 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;
    animation:inputHighlighter 0.3s ease;
}

/* ANIMATIONS ================ */
@-webkit-keyframes inputHighlighter {
    from { background:#5264AE; }
    to 	{ width:0; background:transparent; }
}
@-moz-keyframes inputHighlighter {
    from { background:#5264AE; }
    to 	{ width:0; background:transparent; }
}
@keyframes inputHighlighter {
    from { background:#5264AE; }
    to 	{ width:0; background:transparent; }
}