SOURCE

<div class="box">
    <div id="header">
        <h1>LOGIN</h1>
    </div>
    <form action="" method="post">
        <div class="group">
            <input class="inputMaterial" type="text" required>
            <span class="highlight"></span>
            <span class="bar"></span>
            <label>Username</label>
        </div>
        <div class="group">
            <input class="inputMaterial" type="password" required>
            <span class="highlight"></span>
            <span class="bar"></span>
            <label>Password</label>
        </div>
        <button id="buttonlogintoregister" type="submit">Login</button>
    </form>
    <div id="footer-box"><p class="footer-text">Not a member?<span class="sign-up"> Sign up now</span></p></div>
</div>

body {
    font-family: Arial,serif;
}

/* BOX LOGIN */
.box {
    position: relative;
    height: 410px;
    top: 40px;
    left: 0;
    z-index: 200;
    right: 0;
    width: 400px;
    color: #666;
    border-radius: 3px;
    background: #FFF;
    margin: auto auto 100px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    overflow: hidden;
}

#header {
    background: #009688;
    position: relative;
    height: 100px;
    width: 100%;
    margin-bottom: 30px;
}

.box h1 {
    margin-top: 0;
    font-size: 24px;
    color: #FFF;
    text-align: center;
    line-height: 100px;
}

.box button {
    background: #cfd8dc;
    border: 0;
    color: #009688;
    padding: 10px;
    font-size: 16px;
    font-weight: 300;
    width: 330px;
    margin: 20px auto;
    display: block;
    cursor: pointer;
    -webkit-transition: all 0.4s;
    transition: all 0.4s;
    border-radius: 2px;
}

.box button:active {
    background: #009688;
    color: #263238;
}

.box button:hover {
    background: #009688;
    color: #FFF;
    -webkit-transition: all 0.4s;
    transition: all 0.4s;
}

.box p {
    font-size: 14px;
    text-align: center;
}

.group {
    position: relative;
    margin-bottom: 35px;
    margin-left: 40px;
}

.inputMaterial {
    font-size: 18px;
    padding: 10px 10px 10px 5px;
    display: block;
    width: 300px;
    border: none;
    border-bottom: 1px solid #757575;
}

.inputMaterial:focus {
    outline: none;
}

/* LABEL ======================================= */
label {
    color: #999;
    font-size: 14px;
    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 */
.inputMaterial:focus ~ label, .inputMaterial:valid ~ label {
    top: -20px;
    font-size: 14px;
    color: #009688;
}

/* BOTTOM BARS ================================= */
.bar {
    position: relative;
    display: block;
    width: 315px;
}

.bar:before, .bar:after {
    content: '';
    height: 2px;
    width: 0;
    bottom: 1px;
    position: absolute;
    background: #009688;
    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 */
.inputMaterial:focus ~ .bar:before, .inputMaterial:focus ~ .bar:after {
    width: 50%;
}

/* 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;
    }
}

#footer-box {
    width: 100%;
    height: 50px;
    background: #00695c;
    position: absolute;
    bottom: 0;
}

.footer-text {
    color: #cfd8dc;
}

.sign-up {
    color: white;
    cursor: pointer;
}

.sign-up:hover {
    color: #b2dfdb;
}