/*No preference or Light mode*/
        :root {
            --max-width: 800px;
            --half-width: 450px;
            --quarter-width: 225px;

            --screen-color: #dcdcdc;
            --backgroud-color: #f5f5f5;
            --border-color: #808080;
            --highlight-color: #dcdcdc;
            --text-color: #1f1f1f;
        }

        /*Dark mode*/
        @media (prefers-color-scheme: dark) {
            :root {
                --screen-color: #111111;
                --backgroud-color: #202020;
                --border-color: #a9a9a9;
                --highlight-color: #333333;
                --text-color: #dcdcdc;
            }
        }

        /*Font size*/
        html {
            font-size: 16px;
        }

        @media (min-width: 400px) {
            html {
                font-size: 18px;
            }
        }

        @media (min-width: 600px) {
            html {
                font-size: 20px;
            }
        }

        @media (min-width: 800px) {
            html {
                font-size: 22px;
            }
        }

        body {
            margin: 0;
            padding: 0rem 0.2rem;
            background-color: var(--screen-color);
        }

        header,
        main,
        footer {
            margin: 0.2rem auto;
            padding: 0.2rem 1rem;
            max-width: var(--max-width);
            background-color: var(--backgroud-color);
            border-style: solid;
            border-radius: 0.5rem;
            border-color: var(--border-color);
            color: var(--text-color);
        }

        p {
            line-height: 1.8rem;
        }

        a {
            text-decoration: none;
            padding: 0rem;
            border-radius: 0.3rem;
        }

        main a:hover {
            background-color: var(--highlight-color);
        }

        footer {
            margin-bottom: 3.7rem;
        }

        img {
            max-width: var(--max-width);
            width: 100%;
            height: auto;
        }

        figure {
            margin: 0 0 1rem 0;
            padding: 0;
        }

        figcaption {
            text-align: center;
        }

        .half-width {
            max-width: var(--half-width);
            width: 50%;
            height: auto;
        }

        .quarter-width {
            max-width: var(--quarter-width);
            width: 25%;
            height: auto;
        }

        .align-center {
            text-align: center;
        }

        /*Sections*/
        h1 {
            font-size: 1.5rem;
            margin: 0.2rem 0rem;
        }

        h2 {
            padding: 0.5rem;
            font-size: 1.4rem;
            background-color: var(--highlight-color);
        }

        h3 {
            padding-left: 0.5rem;
            font-size: 1.3rem;
            border-bottom-style: solid;
            border-color: var(--highlight-color);
        }

        h4 {
            padding-left: 0.5rem;
            font-size: 1.2rem;
            border-bottom-style: dashed;
            border-color: var(--highlight-color);
        }

        h5 {
            padding-left: 0.5rem;
            font-size: 1.1rem;
            border-bottom-style: double;
            border-color: var(--highlight-color);
        }

        h6 {
            font-size: 1rem;
            padding-left: 0.5rem;
        }

        .time_stamp {
            text-align: right;
            margin-top: 0.2rem;
            padding: 0;
        }

        /*Navigation*/
        .breadcrumb {
            list-style: none;
            margin: 0;
            padding: 0.5rem;
        }

        .breadcrumb li:after {
            content: '/';
            margin-top: 0.3rem;
        }

        .nav_link ul {
            text-align: center;
            margin: 0;
            padding: 0;
        }

        .nav_link li,
        .breadcrumb li {
            display: inline-flex;
            margin: 0;
            padding: 0;
        }

        .nav_link a,
        .breadcrumb a,
        #nav-drawer,
        .toc_open,
        .toc_contents a,
        #copy_url {
            margin: 0.2rem;
            padding: 0.3rem 0.3rem;
            background-color: var(--backgroud-color);
            border-radius: 0.3rem;
            font-weight: bold;
            color: var(--text-color);
            text-align: center;
            line-height: 1rem;
        }

        .nav_link a:hover,
        .breadcrumb a:hover,
        #nav-drawer:hover,
        #nav-open:hover,
        .blog_card:hover,
        .toc_open:hover,
        .toc_contents a:hover {
            background-color: var(--highlight-color);
            cursor: pointer;
        }
        
        #copy_url:hover {
            background-color: var(--highlight-color);
            cursor: copy;
        }

        a svg,
        .nav_link svg,
        .breadcrumb svg {
            vertical-align: -0.15rem;
        }

        .nav_link small {
            font-weight: normal;
            font-size: 0.7rem;
        }

        /*Blog card*/
        .blog_card {
            margin: 1rem 0rem;
            padding: 0.5rem;
            display: flex;      
            border-style: solid;
            border-width: 0.1rem;
            border-radius: 0.5rem;
            border-color: var(--border-color);
            background-color: var(--backgroud-color);
        }

        .blog_card img {
            align-self: flex-start;
            width: 100px;
            margin-right: 1rem;
        }
    
        .blog_card div {
            color: var(--text-color);
        }
        .blog_card span {
            font-weight: bold;        
        }

        #bottom_nav {
            width: 100%;
            height: 3.2rem;
            position: fixed;
            bottom: 0rem;
            border-top-style: solid;
            border-color: var(--border-color);
            background-color: var(--backgroud-color);
        }

        /*Sidebar*/
        #nav-drawer {
            position: relative;
        }

        .nav-unshown {
            display: none;
        }

        #nav-open {
            display: inline-block;
            vertical-align: -1rem;
        }

        #nav-close {
            display: none;
            position: fixed;
            z-index: 99;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--screen-color);
            opacity: 0;
            transition: 0.3s ease-in-out;
        }

        #nav-content {
            overflow: auto;
            position: fixed;
            bottom: 0;
            left: 0;
            z-index: 9999;
            width: 14rem;
            height: 100%;
            background: var(--backgroud-color);
            transition: .3s ease-in-out;
            transform: translateX(-105%);
            cursor: default;
        }

        #nav-content ul {
            margin-left: 0.5rem;
            margin-top: 1rem;
            padding: 0;
            display: flex;
            flex-direction: column;
        }

        #nav-input:checked~#nav-close {
            display: block;
            opacity: 0.6;
        }

        #nav-input:checked~#nav-content {
            transform: translateX(0%);
        }

        /*Table of contents*/
        .toc {
           border: solid;
           border-width: 0.1rem;
           border-color: var(--border-color);
        }
        .toc_contents {
           font-size: 0.9rem;
        }
        .toc_contents a {
           padding: 0 0.3rem;
           font-weight: normal;
        }
        .toc_contents ul {
           padding-left: 0.5rem;
           list-style: none;
           counter-reset: section;
        }
        .toc_contents li::before {
           counter-increment: section;
           content: counters(section, ".")".";
           font-style: italic;
        }
        .toc_contents li {
           padding-left: 0.5rem;
           margin: 0.2rem 0rem;
        }
        .toc_contents ul:first-child > li {
           padding-left: 0rem;
        }

        /*Figure*/
        figure {
            margin: 1rem 0;
            text-align: center;
        }