website-2018/sgawebsite/static/css/header.css

header {
    position: relative;
    width: 100%;
}

#banner {
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #fff;
    position: relative;
    z-index: 3;
    vertical-align: middle;
    font-size: 2.5em;
    font-weight: bold;
    overflow: hidden;
}

#logo {
    width: 15vh;
    height: 12vh;
    background-image: url('../img/logo.png');
    background-size: 100%;
    background-position: center;
    background-repeat: no-repeat;
}

#menu-toggle {
    cursor: pointer;
    background-color: #fff;
    outline: none;
    display: none;
}

#menu-toggle:hover {
    background-color: #f5f5f5;
}

#menu-toggle:active {
    background-color: #e0e0e0;
}

#menu-toggle>i {
    width: 48px;
    height: 48px;
    display: block;
    background-image: url('../icons/menu.png');
    background-size: 50%;
    background-repeat: no-repeat;
    background-position: center;
}

nav#menu {
    width: 100%;
    display: inline-flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    border-bottom: 3px solid rgb(164, 38, 44);
}

a.menu-item {
    width: 12vw;
    color: #000;
    font-size: 1em;
    z-index: 10;
    display: inline-block;
    float: left;
}

button.menu-item {
    cursor: pointer;
    font-size: 1.8em;
    width: 100%;
    height: 100%;
    outline: none;
    color: #000;
    background-color: transparent;
    border: none;
}

button.menu-item:hover {
    color: #767676;
}

button.menu-item:active {
    font-size: 1.4em;
    color: #9f9f9f;
}

#dome:before {
    position: absolute;
    width: 100%;
    height: 40vh;
    min-height: 280px;
    top: 0vh;
    content: '';
    display: block;
    background-color: rgba(255, 255, 255, 0.1);
    -webkit-filter: blur(10px);
    filter: blur(10px);
    z-index: -1;
}

#dome {
    position: relative;
    width: 100%;
    height: 40vh;
    min-height: 280px;
    color: #000;
    background-color: rgba(255, 255, 255, 0.6);
}

#dome:after {
    position: absolute;
    width: 100%;
    height: 40vh;
    min-height: 280px;
    top: 0vh;
    content: '';
    display: block;
    background-color: #010318;
    background-image: url('../img/bg.jpg');
    background-size: cover;
    background-position-x: center;
    background-position-y: 0;
    background-repeat: no-repeat;
    background-attachment: fixed;
    z-index: -2;
}