:root {
            --primary: #10B981;
            --primary-dark: #059669;
            --primary-light: #D1FAE5;
            --accent: #4ecca3;
            --text-dark: #1F2937;
            --text-light: #6B7280;
            --light: #FFFFFF;
            --light-bg: #F9FAFB;
            --border: #E5E7EB;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--light);
            color: var(--text-dark);
            line-height: 1.6;
            padding: 0;
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Footer Styles */
        footer {
            background: var(--primary-dark);
            padding: 4rem 0 2rem;
            color: var(--light);
            margin-top: auto;
            width: 100%;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-col h3 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
            color: var(--light);
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--light);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-links a:hover {
            color: var(--light);
            transform: translateX(5px);
        }

        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            color: var(--light);
            transition: var(--transition);
            text-decoration: none;
        }

        .social-link:hover {
            background: var(--light);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }

        /* Logo Styles */
        .logo-container {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            margin-bottom: 1.5rem;
        }

        .logo-container img {
            height: 60px;
            width: 60px;
            border-radius: 50%;
            object-fit: cover;
        }

        .logo-text {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--light);
        }

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

        /* Footer Description */
        .footer-description {
            margin-top: 1.5rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 300px;
            line-height: 1.6;
        }

        /* Back to Top Button */
        .back-to-top {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--light);
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: var(--shadow);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-5px);
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .footer-grid {
                gap: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            footer {
                padding: 3rem 0 1.5rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
                text-align: center;
            }
            
            .footer-col h3::after {
                left: 50%;
                transform: translateX(-50%);
            }
            
            .social-links {
                justify-content: center;
            }
            
            .footer-description {
                margin: 1.5rem auto 0;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                gap: 1.5rem;
            }
            
            .footer-col h3 {
                font-size: 1.3rem;
                margin-bottom: 1rem;
            }
            
            .logo-container {
                flex-direction: column;
                text-align: center;
            }
            
            .back-to-top {
                width: 45px;
                height: 45px;
                bottom: 15px;
                right: 15px;
            }
        }

        /* Demo Content */
        .main-content {
            flex: 1;
            padding: 2rem;
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }
        
        .placeholder {
            background: var(--light-bg);
            border-radius: 8px;
            padding: 2rem;
            margin-bottom: 2rem;
            text-align: center;
        }