.site-header {
    &:after {
        width: 100%;
        display:block;
        content: "";
        float: left;
        height: 5px;
        background: -webkit-radial-gradient(50% -3%, ellipse cover, rgba(0, 0, 0, 0.1), rgba(97, 97, 97, 0) 40%);
        background: radial-gradient(ellipse at 50% 0%, rgba(0, 0, 0, 0.1), rgba(97, 97, 97, 0) 80%);
    }
    .header-content {
         @include center();
        .site-branding {
            &.center {
                text-align: center;
                @include margin(0);
                @include padding($base__spacing);
                float: none;
            }
            .site-title {
                @include margin(0);
                @include padding(0);
                a {
                    @include margin(0);
                    @include padding(0);
                    display: block;
                    font-weight: $font__normal;
                }
            }
            .site-description {
                @include margin(0);
                @include padding(0);
                font-weight: $font__light;
            }
            .custom-logo {
                @include margin(0);
                @include padding(0);
            }        
        }
        //header navigation
        .header-nav {
            //first center
            &.center {
                @include margin(null -999em);
                @include padding(null 999em);
                ul {
                    list-style: none;
                    text-align: center;
                    margin: 0;
                    li {
                        *display: inline;
                        display: inline-block;
                        a {
                            display: block;
                            @include padding($small__spacing);
                        }
                    }
                }
            }
        }
    }
}