body {
            margin: 0;
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        header {
            text-align: center;
            padding: 0px;
            background: #f5f5f5;
        }

        header img {
            max-width: 100%;
        }

        footer {
            text-align: center;
            padding: 10px;
            background: #f5f5f5;
            flex: none;
        }

        nav {
            background: #333;
        }

        .menu {
            display: flex;
            justify-content: center;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .menu li {
            padding: 15px;
        }

        .menu a {
            color: white;
            text-decoration: none;
        }

        .hamburger {
            display: none;
            font-size: 24px;
            padding: 15px;
            cursor: pointer;
            color: white;
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 15px;
            border-top: 1px solid #444;
            color: white;
            text-decoration: none;
            line-height: 1.5;
            box-sizing: border-box;
        }

        main {
            padding: 20px;
            flex: 1;
            text-align: center;
        }

        section {
            display: none;
        }

        section.active {
            display: block;
        }

        .home {
            display: block;
        }

        @media (max-width: 768px) {
            .menu {
                display: none;
            }

            .hamburger {
                display: block;
                background: #333;
            }

            .mobile-menu {
                display: none;
                background: #333;
            }

            .mobile-menu.show {
                display: flex;
            }

            body {
                font-size: 1.15rem;
            }

            h1 {
                font-size: 1.5rem;
            }

            h2 {
                font-size: 1.3rem;
            }

            h3 {
                font-size: 1.25rem;
            }

            p,
            li,
            label,
            input,
            textarea,
            button {
                font-size: 1.11rem;
            }
        }