body {
    margin: 0;
    color: #edf3ff;
    background: #c8c8c8;
    background: url(https://hdqwalls.com/download/material-design-4k-2048x1152.jpg) fixed;
    background-size: cover;
    font: 600 16px/18px 'Open Sans',sans-serif;
}

:after, :before {
    box-sizing: border-box
}

.clearfix:after, .clearfix:before {
    content: '';
    display: table
}

.clearfix:after {
    clear: both;
    display: block
}

a {
    color: inherit;
    text-decoration: none
}

.login-wrap {
    width: 100%;
    margin: auto;
    max-width: 510px;
    min-height: 510px;
    position: relative;
    background: url(https://maxcdn.icons8.com/app/uploads/2016/03/material-1-1000x563.jpg) no-repeat center;
    background-size: cover;
    box-shadow: 0 12px 15px 0 rgba(0,0,0,.24),0 17px 50px 0 rgba(0,0,0,.19);
}

.login-html {
    width: 100%;
    height: 100%;
    position: absolute;
    padding: 90px 70px 50px 70px;
    background: rgba(0,0,0,0.5);
}

    .login-html .sign-in-htm,
    .login-html .for-pwd-htm {
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        position: absolute;
        -webkit-transform: rotateY(180deg);
        transform: rotateY(180deg);
        -webkit-backface-visibility: hidden;
        backface-visibility: hidden;
        -webkit-transition: all .4s linear;
        transition: all .4s linear;
    }

    .login-html .sign-in,
    .login-html .for-pwd,
    .login-form .group .check {
        display: none;
    }

    .login-html .tab,
    .login-form .group .label,
    .login-form .group .button {
        text-transform: uppercase;
    }

    .login-html .tab {
        font-size: 22px;
        margin-right: 15px;
        padding-bottom: 5px;
        margin: 0 15px 10px 0;
        display: inline-block;
        border-bottom: 2px solid transparent;
    }

    .login-html .sign-in:checked + .tab,
    .login-html .for-pwd:checked + .tab {
        color: #fff;
        border-color: #1161ee;
    }

.login-form {
    min-height: 345px;
    position: relative;
    -webkit-perspective: 1000px;
    perspective: 1000px;
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
}

    .login-form .group {
        margin-bottom: 15px;
    }

        .login-form .group .label,
        .login-form .group .input,
        .login-form .group .button {
            width: 100%;
            color: #fff;
            display: block;
        }

        .login-form .group .input,
        .login-form .group .button {
            border: none;
            padding: 15px 20px;
            border-radius: 25px;
            background: rgba(255,255,255,.1);
        }

        .login-form .group input[data-type="password"] {
            text-security: circle;
            -webkit-text-security: circle;
        }

        .login-form .group .label {
            color: #aaa;
            font-size: 12px;
        }

        .login-form .group .button {
            background: #1161ee;
        }

        .login-form .group label .icon {
            width: 15px;
            height: 15px;
            border-radius: 2px;
            position: relative;
            display: inline-block;
            background: rgba(255,255,255,.1);
        }

            .login-form .group label .icon:before,
            .login-form .group label .icon:after {
                content: '';
                width: 10px;
                height: 2px;
                background: #fff;
                position: absolute;
                -webkit-transition: all .2s ease-in-out 0s;
                transition: all .2s ease-in-out 0s;
            }

            .login-form .group label .icon:before {
                left: 3px;
                width: 5px;
                bottom: 6px;
                -webkit-transform: scale(0) rotate(0);
                transform: scale(0) rotate(0);
            }

            .login-form .group label .icon:after {
                top: 6px;
                right: 0;
                -webkit-transform: scale(0) rotate(0);
                transform: scale(0) rotate(0);
            }

        .login-form .group .check:checked + label {
            color: #fff;
        }

            .login-form .group .check:checked + label .icon {
                background: #1161ee;
            }

                .login-form .group .check:checked + label .icon:before {
                    -webkit-transform: scale(1) rotate(45deg);
                    transform: scale(1) rotate(45deg);
                }

                .login-form .group .check:checked + label .icon:after {
                    -webkit-transform: scale(1) rotate(-45deg);
                    transform: scale(1) rotate(-45deg);
                }

.login-html .sign-in:checked + .tab + .for-pwd + .tab + .login-form .sign-in-htm {
    -webkit-transform: rotate(0);
    transform: rotate(0);
}

.login-html .for-pwd:checked + .tab + .login-form .for-pwd-htm {
    -webkit-transform: rotate(0);
    transform: rotate(0);
}

.hr {
    height: 2px;
    margin: 60px 0 50px 0;
    background: rgba(255,255,255,.2);
}

.foot-lnk {
    text-align: center;
}