styles/_header.scss

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

@use 'colors';

div#header {
    color: white;
    background: colors.$header-background-color;
    display: table;
    width: 100%;
}

#header h1 {
    text-align: left;
    font-size: 1.75em;
    margin: 0.25em 0;
    white-space: nowrap;
}

#header .readable-content {
    display: flex;
    align-items: center;
}

#header .readable-content h1 {
    flex: 1;
}

#header h1 a[href] {
    color: inherit;
    text-decoration: inherit;
}

#header h1 a[href]:before {
    display: inline-block;
    content: ' ';
    width: 2em;
    height: 2em;
    vertical-align: middle;
    margin-right: 0.25em;
    background-image: url('/images/logos/guac-tricolor-logo.svg');
    background-repeat: no-repeat;
    background-size:         cover;
    background-position:         center;
}

ul#navigation {
    text-align: right;
    font-size: 0.9em;
    padding: 0;
    margin: 0;
    z-index: 10;
}

#navigation li a[href="#download"],
#navigation li a[href="/faq/"] {
    font-weight: bold;
}

#navigation li {
    display: inline-block;
    white-space: nowrap;
    position: relative;
    border-radius: 3px;
}

#navigation a[href] {
    color: inherit;
    text-decoration: none;
}

#navigation li a {
    display: block;
    padding: 0.5em;
    border-radius: 3px;
}

#navigation .dropdown-menu a {
    font-weight: normal;
}

#navigation li a:hover {
    text-decoration: underline;
    background-color: rgba(255, 255, 255, 0.25);
}

#navigation a.apache,
#navigation a.download,
#navigation a.github {
    padding-left: 2em;
    font-weight: bold;

    background-position: 0.5em center;
    background-size: 1em;
    background-repeat: no-repeat;
}

#navigation a.apache {
    background-image: url('/images/logos/asf-feather.svg');
    padding-left: 1.5em;
    background-size: 0.7em;
}

#navigation li.dropdown .dropdown-menu {
    display: none;
    overflow: hidden;
}

#navigation li.dropdown.open {
    background: rgba(255, 255, 255, 0.25);
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

#navigation li.dropdown.open .dropdown-menu {
    position: absolute;
    left: 0;
    display: block;
    padding: 0.5em;
    text-align: left;
    min-width: 100%;
    box-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1;
    background: colors.$header-background-color;
    border-radius: 8px;
    border-top-left-radius: 0;
}

#navigation li.dropdown .dropdown-menu li {
    display: block;
}

#navigation li.dropdown .dropdown-toggle::after {
    display: inline-block;
    content: ' ';
    width: 0;
    height: 0;
    border-left: 0.25em solid transparent;
    border-right: 0.25em solid transparent;
    border-top: 0.25em solid;
    vertical-align: middle;
    margin-left: 0.25em;
}

/* Style appropriately for printing */
@media print {
    div#header {
        background: none;
        display: none;
    }

    #header h1 {
        text-align: right;
        margin: 1em 0;
        font-size: 1em;
    }

    #header h1 {
        background: none;
        color: black;
        padding: 0;
    }

    #navigation {
        display: none;
    }
}

@media screen and (max-width: 1100px) {
    #header .readable-content {
        flex-direction: column;
    }
}

@media screen and (max-width: 800px) {
    #header #navigation {
        display: none;
    }
}