:root {
            --primary: #0070ad;
            --dark: #070707;
            --light: #eeeeee;
            --white: #ffffff;
            --text: #666666;
        }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; margin: 0; line-height: 1.6; color: var(--text); background: var(--dark) url('/assets/www_ciemne-tło-z-piramidą.jpg') center top repeat-y; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: rgba(0,0,0,0.8); padding: 20px 0; position: sticky; top: 0; z-index: 1000; }
        nav ul { list-style: none; display: flex; gap: 20px; padding: 0; }
        nav a { color: var(--white); text-decoration: none; font-weight: bold; }
        .hero { height: 600px; display: flex; align-items: center; justify-content: center; background-size: cover; background-position: center; }
        #strona_glowna { background-image: url('/assets/www_str-główna_baner-1b_1920x850.jpg'); }
        .section { padding: 60px 0; background: var(--white); }
        #o_firmie { background: #eee url('/assets/www_o-firmie.jpg') bottom center fixed; }
        #realizacje { background: #fff url('/assets/www_aktualności-tło_1920x850.jpg') center center fixed; }
        .portfolio-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-top: 30px; }
        .port-item { background: #f9f9f9; padding: 15px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); text-align: center; }
        .port-img { max-width: 100%; height: auto; border-radius: 4px; }
        footer { background: var(--dark); color: var(--white); text-align: center; padding: 20px 0; }
        @media (max-width: 768px) { .portfolio-grid { grid-template-columns: 1fr; } }