:root {
    --navbar-bg-color: #566D7E;
    --navbar-text-color: #ddd;
    --navbar-text-color-focus: white;
    --navbar-bg-contrast: #838996;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    padding-left: 1.4rem;
    padding-right: 1.4rem;
    margin-left: auto;
    margin-right: auto;
}

#navbar {
    --navbar-height: 64px;
    position: fixed;
    height: var(--navbar-height);
    background-color: var(--navbar-bg-color);
    left: 0;
    right: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    height: 100%;
    align-items: center;
}

.navbar-item {
    margin: 0.4em;
    width: 100%;
}

.home-link,
.navbar-link {
    color: var(--navbar-text-color);
    text-decoration: none;
    display: flex;
    font-weight: 400;
    align-items: center;
}

    .home-link:is(:focus, :hover) {
        color: var(--navbar-text-color-focus);
    }

.navbar-link {
    justify-content: center;
    width: 100%;
    padding: 0.4em 0.8em;
    border-radius: 5px;
}

    .navbar-link:is(:focus, :hover) {
        color: var(--navbar-text-color-focus);
        background-color: var(--navbar-bg-contrast);
    }

.navbar-logo {
    width: 275px;
    height: 50px;
    margin-right: 0.5em;
}

#navbar-toggle {
    cursor: pointer;
    border: none;
    background-color: transparent;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.icon-bar {
    display: block;
    width: 25px;
    height: 4px;
    margin: 2px;
    background-color: var(--navbar-text-color);
}

#navbar-toggle:is(:focus, :hover) .icon-bar {
    background-color: var(--navbar-text-color-focus);
}

#navbar-toggle[aria-expanded="true"] .icon-bar:is(:first-child, :last-child) {
    position: absolute;
    margin: 0;
    width: 30px;
}

#navbar-toggle[aria-expanded="true"] .icon-bar:first-child {
    transform: rotate(45deg);
}

#navbar-toggle[aria-expanded="true"] .icon-bar:nth-child(2) {
    opacity: 0;
}

#navbar-toggle[aria-expanded="true"] .icon-bar:last-child {
    transform: rotate(-45deg);
}

#navbar-menu {
    position: fixed;
    top: var(--navbar-height);
    bottom: 0;
    opacity: 0;
    visibility: hidden;
    left: 0;
    right: 0;
}

#navbar-toggle[aria-expanded="true"] + #navbar-menu {
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 1;
    visibility: visible;
}

.navbar-links {
    list-style: none;
    position: absolute;
    background-color: var(--navbar-bg-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    left: 0;
    right: 0;
    margin: 1.4rem;
    border-radius: 5px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

#navbar-toggle[aria-expanded="true"] + #navbar-menu .navbar-links {
    padding: 1em;
}

@media screen and (min-width: 700px) {
    #navbar-toggle,
    #navbar-toggle[aria-expanded="true"] {
        display: none;
    }

        #navbar-menu,
        #navbar-toggle[aria-expanded="true"] #navbar-menu {
            visibility: visible;
            opacity: 1;
            position: static;
            display: block;
            height: 100%;
        }

            .navbar-links,
            #navbar-toggle[aria-expanded="true"] #navbar-menu .navbar-links {
                margin: 0;
                padding: 0;
                box-shadow: none;
                position: static;
                flex-direction: row;
                width: 100%;
                height: 100%;
            }
}