:root {
            --bg-color: #0f111a;
            --panel-bg: #1e2235;
            --text-color: #e2e8f0;
            --accent-green: #00ff66;
            --accent-blue: #00d2ff;
            --border-color: #2d3748;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-color);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

        /* Top Navigation Menu Bar */
        header {
            background-color: var(--panel-bg);
            border-bottom: 2px solid var(--border-color);
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-area img {
            width: 45px;
            height: 45px;
            filter: invert(1);
        }

        .brand-name {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 1px;
            background: linear-gradient(45deg, #fff, #a0aec0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* Desktop Navigation Links */
        nav ul {
            display: flex;
            list-style: none;
            gap: 1rem;
        }

        nav button {
            background: transparent;
            border: 1px solid transparent;
            color: var(--text-color);
            padding: 0.5rem 0.8rem;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all 0.3s ease;
            border-radius: 4px;
        }

        nav button:hover, nav button.active {
            color: var(--accent-blue);
            border-color: var(--accent-blue);
            background-color: rgba(0, 210, 255, 0.05);
        }

        /* Hamburger Menu Icon (Mobile Only) */
        .burger-menu {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 30px;
            height: 21px;
            cursor: pointer;
            z-index: 200;
            background: transparent;
            border: none;
        }

        .burger-menu span {
            display: block;
            height: 3px;
            width: 100%;
            background-color: var(--text-color);
            border-radius: 3px;
            transition: all 0.3s ease-in-out;
        }

        .burger-menu.open span:nth-child(1) {
            transform: translateY(9px) rotate(45deg);
            background-color: var(--accent-blue);
        }

        .burger-menu.open span:nth-child(2) {
            opacity: 0;
        }

        .burger-menu.open span:nth-child(3) {
            transform: translateY(-9px) rotate(-45deg);
            background-color: var(--accent-blue);
        }

        /* Workspace Grid Layout */
        .workspace {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 2rem;
            gap: 1.5rem;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }

        .system-container {
            position: relative;
            width: 950px;
            height: 520px;
            background-color: rgba(20, 24, 38, 0.6);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.5);
        }

        #conveyorCanvas {
            position: absolute;
            top: 0;
            left: 0;
            z-index: 1;
            border-radius: 12px;
        }

        .narrative-box {
            position: absolute;
            top: 90px;
            left: 90px;
            width: 600px;
            height: 340px;
            z-index: 2;
            background-color: rgba(15, 17, 26, 0.9);
            border: 2px solid var(--border-color);
            border-left: 4px solid var(--accent-blue);
            border-radius: 8px;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            box-shadow: inset 0 0 20px rgba(0,0,0,0.6);
            transition: border-color 0.5s ease;
        }

        .narrative-box.processing {
            border-left-color: var(--accent-green);
        }

        .step-tag {
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.85rem;
            color: var(--accent-blue);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 0.5rem;
        }

        .narrative-box h2 {
            font-size: 1.6rem;
            margin-bottom: 1rem;
            color: #fff;
        }

        .narrative-box p {
            line-height: 1.6;
            color: #cbd5e0;
            font-size: 1rem;
        }

        .tech-tags {
            margin-top: 1.5rem;
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .tag {
            font-family: 'Courier New', Courier, monospace;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 0.2rem 0.6rem;
            font-size: 0.8rem;
            border-radius: 4px;
            color: #a0aec0;
        }

        .control-panel {
            background-color: var(--panel-bg);
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 1rem 2rem;
            display: flex;
            align-items: center;
            gap: 2rem;
            z-index: 10;
            box-shadow: 0 8px 16px rgba(0,0,0,0.3);
        }

        .panel-status {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Courier New', Courier, monospace;
            font-weight: bold;
            font-size: 0.9rem;
            min-width: 180px;
        }

        .status-light {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: var(--accent-blue);
            box-shadow: 0 0 10px var(--accent-blue);
        }

        .status-light.running {
            background-color: var(--accent-green);
            box-shadow: 0 0 10px var(--accent-green);
        }

        .step-buttons {
            display: flex;
            gap: 0.5rem;
        }

        .step-btn {
            background-color: #141722;
            color: #718096;
            border: 1px solid var(--border-color);
            width: 40px;
            height: 40px;
            border-radius: 6px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'Courier New', Courier, monospace;
            font-size: 1rem;
        }

        .step-btn:hover {
            border-color: var(--accent-blue);
            color: #fff;
        }

        .step-btn.active {
            background-color: var(--accent-blue);
            color: var(--bg-color);
            border-color: var(--accent-blue);
            box-shadow: 0 0 12px rgba(0, 210, 255, 0.4);
        }

        /* High-Tech Terminal Footer Styling */
        footer {
            background-color: #0b0c13;
            border-top: 1px solid var(--border-color);
            padding: 1.5rem;
            text-align: center;
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.85rem;
            color: #718096;
        }

        /* 📱 Responsive Mobile Breakpoints Rules CSS */
        @media (max-width: 992px) {
            .burger-menu {
                display: flex;
            }

            nav ul {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background-color: var(--panel-bg);
                border-left: 2px solid var(--border-color);
                flex-direction: column;
                padding: 80px 2rem 2rem 2rem;
                gap: 1rem;
                transition: right 0.3s ease-in-out;
                z-index: 150;
                box-shadow: -10px 0 30px rgba(0,0,0,0.5);
            }

            nav ul.open {
                right: 0;
            }

            nav ul li {
                width: 100%;
            }

            nav button {
                width: 100%;
                text-align: left;
                padding: 0.8rem 1rem;
            }

            .system-container {
                width: 100%;
                height: auto;
                background: transparent;
                border: none;
                box-shadow: none;
            }

            #conveyorCanvas {
                display: none; /* Auto-hides Canvas graphic engine overlay gracefully on phones */
            }

            .narrative-box {
                position: relative;
                top: 0;
                left: 0;
                width: 100%;
                height: auto;
                min-height: 300px;
                background-color: var(--panel-bg);
            }

            .control-panel {
                width: 100%;
                flex-direction: column;
                gap: 1rem;
                padding: 1rem;
            }

            .step-buttons {
                width: 100%;
                justify-content: space-between;
            }

            .step-btn {
                flex: 1;
                max-width: 50px;
            }
        }