modules/frontend/app/components/web-console-sidebar/web-console-sidebar-navigation/style.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.
 */

web-console-sidebar-navigation {
    display: flex;
    flex-direction: column;
    padding-top: 14px;

    nav {
        display: flex;
        flex-direction: column;
        list-style-type: none;

        &>li {
            display: flex;
        }
    }

    .web-console-sidebar-navigation__link-icon {
        width: 20px;
        height: auto;
    }

    .web-console-sidebar-navigation__link-narrow {
        height: var(--width-narrow);
        width: var(--width-narrow);
        color: var(--inactive-link-color);
        display: flex;
        justify-content: center;
        align-items: center;

        &:hover, &:focus {
            color: var(--active-link-color);

        }

        &.web-console-sidebar-navigation__link-active {
            color: var(--active-link-color);
            position: relative;

            &:after {
                content: '';
                display: block;
                width: 2px;
                // Line can't be outside of scrollable container
                right: 0;
                top: 0;
                bottom: 0;
                position: absolute;
                background: var(--active-link-color);
            }
        }
        .web-console-sidebar-navigation__link-content {
            display: none;
        }
    }

    li:first-of-type > .web-console-sidebar-navigation__link-wide {
        margin-top: 18px;        
    }

    .web-console-sidebar-navigation__link-wide {
        color: #393939;
        text-decoration: none !important;
        line-height: 19px;
        font-size: 16px;
        padding: 10px 28px 11px;
        width: var(--width-wide);
        display: inline-flex;
        align-items: center;

        &:hover, &:focus {
            color: var(--active-link-color);

            .web-console-sidebar-navigation__link-icon {
                color: inherit;
            }
        }
        &.web-console-sidebar-navigation__link-active {
            color: white;
            background: var(--active-link-color);

            .web-console-sidebar-navigation__link-icon {
                color: inherit;
            }
        }
        .web-console-sidebar-navigation__link-icon {
            margin-right: 12px;
        }
    }
}