#header {
    width: 100%;
    height: 90px;
    background-color: var(--primary-container-color);
    backdrop-filter: var(--primary-container-backdrop-filter);
    border-bottom: 2px solid #222;
}

#titlebar {
    width: 80%;
    height: 30px;
    overflow: visible;
    position: fixed;
    top: 0;
    right: 0;
    z-index: 10;
}

#titlebar-title {
    float: left;
    height: 30px;
    width: calc(100% - 150px);
    -webkit-app-region: drag;
}

#titlebar-buttons {
    float: right;
    overflow: auto;
    height: 30px;
    padding: 0 5px;
    top: 0px;
    right: 10px;
}

.titlebar-button {
    float: right;
    line-height: 30px;
    height: 30px;
    width: 40px;
    text-align: center;
    margin: 0px 2px;
    color: #999;
    transition-duration: 0.2s;
    cursor: default;
}

.titlebar-button.minimize {
    line-height: 25px;
}

.titlebar-button:hover {
    background-color: #fff1;
    color: #fff;
}

.titlebar-button.exit:hover {
    background-color: #f00a;
}

#header .logo {
    background-image: url(../img/header-logo.png);
    background-position: left;
    background-repeat: no-repeat;
    background-size: contain;
    height: 100%;
    width: 20%;
    -webkit-app-region: drag;
    position: fixed;
    top: 0;
    left: 0;
}

#nav-container {
    width: 100%;
    text-align: center;
    position: fixed;
    top: 30px;
    left: 0;
    z-index: 2;
}

#nav {
    display: inline-block;
    vertical-align: middle;
    font-family: var(--nav-item-font);
}

#nav::before, #nav::after {
    display: inline-block;
    content: "";
    width: 100px;
    height: 1px;
    background-color: #444;
    vertical-align: middle;
    margin: 0 10px;
    margin-top: -10px;
}

#nav .navbar-item {
    display: inline-block;
    vertical-align: middle;
    color: #999;
    padding: 5px 10px 0px 10px;
    height: 33px;
    transition-property: color;
    transition-duration: 0.3s;
}

#nav .navbar-item::after {
    opacity: 0;
    display: inline-block;
    content: "";
    width: 5%;
    height: 2px;
    background-color: #6ef;
    position: relative;
    top: -5px;
    box-shadow: 0 0 10px #6ef;
    transition-property: opacity, width;
    transition-duration: 0.3s;
}

#nav .navbar-item.active::after {
    opacity: 1;
    width: 60%;
}

#nav .navbar-item:hover, #nav .navbar-item.active {
    color: white;
    text-shadow: 0 0 10px #fff9;
}