body {
    font-family: 'Source Sans Pro', sans-serif;
}

div, ul, li, span, p {
    margin: 0;
    padding: 0;
}

#header {
    height: 200px;
    justify-content: center;
    align-items: center;
    display: flex;
    position: relative;
    overflow: hidden;
}

#header .header-image {
    background-image: url("../img/triaxial_cell-29.jpg");
    background-size: cover;
    background-position: center;
    height: 110%;
    width: 110%;
    position: absolute;
    z-index: 0;
    filter: blur(3px);
}

#header .header-title {
    background-color: rgba(255, 255, 255, 0.5);
    display: inline-block;
    padding: 10px;
    z-index: 50;
}

#header .header-title h1 {
    font-weight: lighter;
    font-size: 35px;
}

#header .header-title h2 {
    font-weight: lighter;
    font-size: 18px;
    text-align: center;
    margin-top: 10px;
}

#header .header-menu {
    position: absolute;
    left: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.7);
    font-weight: lighter;
    font-size: 20px;
    padding: 10px 10px;
}   
#header .header-menu a {
    color: black;
    font-weight: 400;
    margin: 0 5px;
}

#header .header-menu .active {
    text-decoration: underline;
}