jennydaman/mindmatter

.header {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 40px;
    padding: 0;
    background: #A9A9A9;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
    z-index: 50;
    border-left: thick solid rgba(0,0,0,0.2);

}

.header h1 {
    float: left;
    text-align: center;
    margin: 0;
    padding-left: 17px;
    font-size: 20px;
    line-height: 40px;
    font-weight: bold;
    color: #FFF;
    white-space: nowrap;
}

.header nav {
    float: right;
}

.header nav a {
    font-size: 18px;
    display: inline-block;
    height: 40px;
    line-height: 40px;
    padding: 0 15px;
    min-width: 50px;
    text-align: center;
    background: rgba(255,255,255,0);
    text-decoration: none;
    color: #FFF;
    will-change: background-color;
}

.header nav a:hover,
.header nav a:active {
    background: rgba(0,0,0,0.2);
}

.header nav a.active {
    background: rgba(0,0,0,0.4);
}