:root {
            --bg-dark: #0f172a;
            --bg-darker: #050810;
            --bg-card: #1e293b;
            --border-color: #334155;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #8b5cf6;
            --accent: #ec4899;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.6;
        }

        /* NAVBAR */
        .navbar {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 1rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 2rem;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            flex-shrink: 0;
        }

        .nav-logo img {
            width: 36px;
            height: 36px;
            border-radius: 6px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            flex: 1;
            margin: 0;
            padding: 0;
        }

        .nav-link {
            display: inline-block;
            padding: 0.5rem 1rem;
            color: var(--text-secondary);
            text-decoration: none;
            border-radius: 6px;
            transition: all 0.3s ease;
            font-size: 0.95rem;
            font-weight: 500;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary);
            background-color: rgba(99, 102, 241, 0.15);
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-left: auto;
        }

        .user-info {
            display: flex !important;
            align-items: center;
            gap: 1rem;
        }

        .user-info span {
            color: rgba(140, 0, 255, 0.918);
            background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
            -webkit-background-clip: text;
            background-clip: text;
            font-weight: 700;
        }

        .btn-auth,
        .btn-logout {
            padding: 0.5rem 1.25rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }

        .btn-auth {
            background: var(--primary);
            color: white;
        }

        .btn-auth:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-logout {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-primary);
            padding: 0;
        }

        /* MAIN CONTENT */
        .main-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 2rem 1.5rem;
        }

        /* HERO */
        .hero {
            text-align: center;
            padding: 4rem 2rem;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
            border-radius: 12px;
            margin-bottom: 4rem;
            border: 1px solid var(--border-color);
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.3rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            padding: 1rem 2rem;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            font-size: 1rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(99, 102, 241, 0.1);
        }

        /* FEATURES */
        .features {
            margin-bottom: 4rem;
        }

        .features h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 3rem;
            text-align: center;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 2rem;
            text-align: center;
            transition: all 0.3s ease;
        }

        .feature-card:hover {
            border-color: var(--primary);
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(99, 102, 241, 0.2);
        }

        .feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
        }

        .feature-card p {
            color: var(--text-secondary);
        }

        /* MODAL */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 200;
            align-items: center;
            justify-content: center;
            padding: 1rem;
        }

        .modal.show {
            display: flex;
        }

        .modal-content {
            background: var(--bg-card);
            border-radius: 12px;
            padding: 2rem;
            max-width: 500px;
            width: 100%;
            border: 1px solid var(--border-color);
        }

        .close {
            float: right;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-secondary);
            background: none;
            border: none;
        }

        .close:hover {
            color: var(--primary);
        }

        .auth-toggle {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 1rem;
        }

        .tab-btn {
            padding: 0.5rem 1rem;
            border: none;
            background: none;
            color: var(--text-secondary);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .tab-btn.active {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
        }

        .auth-form {
            display: none;
        }

        .auth-form.active {
            display: block;
        }

        .auth-form h2 {
            margin-bottom: 1rem;
        }

        .auth-form input {
            width: 100%;
            padding: 0.75rem;
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background: var(--bg-dark);
            color: var(--text-primary);
        }

        .auth-form button {
            width: 100%;
        }

        /* FOOTER */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 2rem;
            text-align: center;
            color: var(--text-secondary);
        }

        /* RESPONSIVE */
        @media (max-width: 768px) {
            .nav-container {
                padding: 0.75rem 1rem;
                gap: 1rem;
            }

            .nav-logo span {
                display: none;
            }

            .nav-menu {
                display: none;
            }

            .nav-auth {
                margin-left: 0;
            }

            .menu-toggle {
                display: block;
            }

            .hero {
                padding: 2rem 1rem;
            }

            .hero-content h1 {
                font-size: 2rem;
            }

            .hero-content p {
                font-size: 1rem;
            }

            .features h2 {
                font-size: 1.8rem;
            }

            .features-grid {
                gap: 1.5rem;
            }

            .feature-card {
                padding: 1.5rem;
            }

            .main-content {
                padding: 1rem;
            }
        }

        @media (max-width: 480px) {
            body {
                padding-bottom: 60px;
            }

            .navbar {
                position: fixed;
                width: 100%;
                bottom: 0;
                top: auto;
                border-bottom: none;
                border-top: 1px solid var(--border-color);
            }

            .nav-container {
                padding: 0.5rem 0.75rem;
            }

            .nav-auth {
                display: none;
            }

            .hero {
                padding: 1.5rem 1rem;
                margin-bottom: 2rem;
            }

            .hero-content h1 {
                font-size: 1.5rem;
            }

            .hero-buttons {
                flex-direction: column;
            }

            .btn {
                width: 100%;
            }

            .features h2 {
                font-size: 1.5rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .modal-content {
                padding: 1.5rem;
                max-width: 95%;
            }
        }