:root {
            --header-image: url('https://randomcatproduction.neocities.org/images/logo%204.png');
            --body-bg-image: url('https://randomcatproduction.neocities.org/images/bg_cubed.png');
            --content: #ffff0a;
        }

        body {
            font-family: 'Roboto Mono', Monospace;
            margin: 0;
            background-color: #333333;
            color: #FAF8F6;
            background-image: var(--body-bg-image);
            font-weight: 300;
        }

        @keyframes scroll-x {
            from { background-position: 0 0; }
            to { background-position: 100% 100%; }
        }

        * { box-sizing: border-box; }

        #container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 15px;
        }

        #container a {
            color: #ff8fca;
            font-weight: 500;
            text-decoration: none;
        }

        #container a:hover { text-decoration: underline; }

        #header {
            width: 100%;
            height: 240px;
            background-repeat: no-repeat;
            background-image: var(--header-image);
            background-size: contain;
            background-position: center;
            margin: 0 auto;
        }

        #topBar {
            width: 100%;
            padding: 10px;
            border: 2px solid #ff8fca;
            text-align: center;
            background-color: #303030;
            margin-bottom: 10px;
            font-weight: 600;
        }

        #middle {
            display: flex;
            flex-direction: row;
            gap: 10px;
        }

        aside {
            background-color: #303030;
            border: 2px solid #3fe9f7;
            padding: 20px;
            font-size: smaller;
            flex: 0 0 250px;
        }

        #rightside {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        main {
            background-color: #444444;
            border: 2px solid #ff8fca;
            flex: 1;
            padding: 20px;
        }

        footer {
            background-color: #303030;
            border: 2px solid #3fe9f7;
            width: 100%;
            padding: 10px;
            text-align: center;
            margin-top: 10px;
            font-weight: 500;
        }

        h1, h2, h3 { color: #ff79c0; font-weight: 500; }
        h1 { font-size: 20px; }
        h2 { font-weight: 500; }
        strong { color: #ff79c0; font-weight: 500; }
        ul { padding-left: 20px; }
        li { margin-bottom: 8px; }

        /* --- Toggle button (mobile only) --- */
        #sidebarToggle {
            display: none;
            width: 100%;
            padding: 10px;
            background-color: #303030;
            color: #3fe9f7;
            border: 2px solid #3fe9f7;
            font-family: 'Roboto Mono', monospace;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            margin-top: 10px;
        }

        #sidebarToggle::after {
            content: ' ▼';
            float: right;
            display: inline-block;
            transition: transform 0.2s;
        }

        #sidebarToggle.open::after {
            transform: rotate(180deg);
        }


        #mobileSidebar {
            display: none;
            width: 100%;
            border-top: none;
            margin-top: 0;
        }

        @media only screen and (max-width: 768px) {
            #middle { flex-direction: column; }

            #desktopSidebar { display: none; }

            #sidebarToggle { display: block; }

            #header { height: 180px; }
        }

        @media only screen and (max-width: 480px) {
            #container { padding: 0 10px; }
            #header { height: 140px; }
            h1 { font-size: 20px; }
            main, aside { padding: 15px; }
        }