:root {
            --bg: #0a0c10;
            --panel: #161b22;
            --border: #30363d;
            --accent: #58a6ff;
            --success: #3fb950;
            --text: #c9d1d9;
            --text-dim: #8b949e;
            --code-bg: #010409;
            --nav-height: 70px;
        }

        * { box-sizing: border-box; scroll-behavior: smooth; }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            margin: 0;
            line-height: 1.6;
        }

        /* Nav Branding */
        nav {
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: center;
            border-bottom: 1px solid var(--border);
            background: rgba(13, 17, 23, 0.8);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-content {
            width: 100%;
            max-width: 1200px;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .brand-logo {
            font-size: 1.5rem;
            font-weight: 800;
            text-decoration: none;
            color: #fff;
            letter-spacing: -1px;
        }

        .brand-logo span { color: var(--accent); }

        .nav-links { display: flex; gap: 20px; }
        .nav-links a { 
            text-decoration: none; 
            color: var(--text-dim); 
            font-size: 0.85rem; 
            font-weight: 600;
            transition: 0.2s;
        }
        .nav-links a:hover, .nav-links a.active { color: var(--accent); }

        /* Hero / Tool Section */
        .hero-tool-section {
            padding: 40px 20px;
            background: radial-gradient(circle at top, #1c2128 0%, #0a0c10 100%);
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .tool-header {
            text-align: center;
            margin-bottom: 30px;
            max-width: 800px;
        }

        .tool-header h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            color: #fff;
            letter-spacing: -1px;
        }

        .tool-header p {
            color: var(--text-dim);
            font-size: 1.1rem;
        }

        .app-container {
            width: 100%;
            max-width: 1100px;
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,0,0,0.5);
        }

        .app-controls {
            padding: 15px 25px;
            background: rgba(255,255,255,0.03);
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .workspace {
            display: grid;
            grid-template-columns: 1fr;
            min-height: 450px;
        }

        @media (min-width: 850px) {
            .workspace { grid-template-columns: 1fr 1fr; }
        }

        .pane { display: flex; flex-direction: column; }
        .pane:first-child { border-bottom: 1px solid var(--border); }
        @media (min-width: 850px) {
            .pane:first-child { border-bottom: none; border-right: 1px solid var(--border); }
        }

        .pane-meta {
            padding: 8px 20px;
            background: var(--code-bg);
            font-size: 10px;
            font-weight: 800;
            text-transform: uppercase;
            color: var(--text-dim);
            display: flex;
            justify-content: space-between;
        }

        textarea {
            flex: 1;
            background: var(--code-bg);
            border: none;
            color: var(--accent);
            padding: 20px;
            font-family: 'Fira Code', monospace;
            font-size: 14px;
            resize: none;
            outline: none;
            min-height: 300px;
        }

        #output { color: var(--success); }

        .app-footer {
            padding: 20px 25px;
            background: rgba(255,255,255,0.03);
            border-top: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        @media (min-width: 768px) {
            .app-footer { flex-direction: row; justify-content: space-between; align-items: center; }
        }

        .stats-tray { display: flex; gap: 20px; font-size: 0.9rem; }
        .stats-tray b { color: var(--accent); }

        .btn-group { display: flex; gap: 10px; }
        .btn {
            padding: 12px 20px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--text);
            transition: 0.2s;
            font-size: 0.9rem;
        }

        .btn:hover { border-color: var(--text-dim); background: var(--panel); }
        .btn-primary { background: var(--accent); color: white; border: none; }
        .btn-primary:hover { background: #79b8ff; transform: translateY(-1px); }

        /* Landing Page Content */
        .landing-wrap {
            max-width: 1000px;
            margin: 0 auto;
            padding: 60px 20px;
        }

        .dynamic-content h2 { color: #fff; font-size: 1.8rem; margin-bottom: 20px; }
        .dynamic-content h3 { color: var(--accent); margin-top: 30px; }
        .dynamic-content p { color: var(--text-dim); margin-bottom: 20px; }

        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin: 40px 0;
        }

        .info-card {
            background: var(--panel);
            padding: 25px;
            border-radius: 12px;
            border: 1px solid var(--border);
        }

        .info-card h4 { color: #fff; margin-top: 0; margin-bottom: 10px; }
        .info-card p { color: var(--text-dim); font-size: 0.9rem; margin: 0; }

        footer.main-footer {
            padding: 60px 20px;
            text-align: center;
            border-top: 1px solid var(--border);
            color: var(--text-dim);
            font-size: 0.9rem;
        }

        .toast {
            position: fixed;
            bottom: -50px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--success);
            color: #fff;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28);
            z-index: 2000;
        }
        .toast.show { bottom: 40px; }

        .badge {
            background: rgba(88, 166, 255, 0.1);
            color: var(--accent);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 10px;
            font-weight: 800;
            text-transform: uppercase;
            margin-bottom: 10px;
            display: inline-block;
        }