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

        body {
            font-family: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        .header {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
        }

        .navbar {
            padding: 0;
            min-height: 70px;
        }

        .container-fluid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        .navbar-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .navbar-brand {
            text-decoration: none;
            font-size: 24px;
            font-weight: 700;
            color: #e74c3c;
        }

        .navbar-brand:hover {
            color: #c0392b;
        }

        .navbar-toggle {
            background: none;
            border: none;
            font-size: 18px;
            color: #333;
            display: none;
        }

        .navbar-nav {
            display: flex;
            list-style: none;
            align-items: center;
            gap: 20px;
        }

        .navbar-nav a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        .navbar-nav a:hover {
            color: #e74c3c;
            background-color: #f8f9fa;
        }

        .fa {
            margin-right: 5px;
        }

        main {
            margin-top: 70px;
            min-height: calc(100vh - 140px);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        h1 {
            font-size: 2.5rem;
            color: #2c3e50;
            text-align: center;
            margin: 40px 0 30px;
            font-weight: 700;
        }

        article {
            background: #fff;
            padding: 40px;
            margin-bottom: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }

        article p {
            margin-bottom: 20px;
            font-size: 16px;
            line-height: 1.7;
            text-align: justify;
        }

        article h2, article h3, article h4 {
            margin: 30px 0 20px;
            color: #2c3e50;
        }

        article h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #e74c3c;
            padding-bottom: 10px;
        }

        article h3 {
            font-size: 1.4rem;
        }

        .transition-section {
            background: #fff;
            padding: 30px 40px;
            margin-bottom: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            border-left: 4px solid #e74c3c;
        }

        .links-section {
            background: #fff;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            margin-bottom: 40px;
        }

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.5rem;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #ecf0f1;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 15px 30px;
        }

        .links-section li {
            padding: 0;
        }

        .links-section a {
            color: #3498db;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
            display: block;
            padding: 8px 0;
        }

        .links-section a:hover {
            color: #e74c3c;
        }

        .footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 40px 0 20px;
        }

        .footer h3 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .footer ul {
            list-style: none;
        }

        .footer ul li {
            margin-bottom: 8px;
        }

        .footer a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer a:hover {
            color: #fff;
        }

        .footer .row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer hr {
            border: none;
            height: 1px;
            background: #34495e;
            margin: 20px 0;
        }

        .footer .text-center {
            text-align: center;
            color: #95a5a6;
            font-size: 14px;
        }

        .social-link-footer {
            display: flex;
            gap: 15px;
            margin-top: 10px;
        }

        .social-link-footer a {
            background: #34495e;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: background 0.3s ease;
        }

        .social-link-footer a:hover {
            background: #e74c3c;
        }

        @media (max-width: 768px) {
            .navbar-toggle {
                display: block;
            }

            .navbar-nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 5px 15px rgba(0,0,0,0.1);
                gap: 10px;
            }

            .navbar-nav.show {
                display: flex;
            }

            h1 {
                font-size: 2rem;
                margin: 20px 0;
            }

            article, .transition-section, .links-section {
                padding: 20px;
                margin-bottom: 20px;
            }

            .links-section ul {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .footer .row {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 480px) {
            .container-fluid {
                padding: 0 10px;
            }

            h1 {
                font-size: 1.7rem;
            }

            article, .transition-section, .links-section {
                padding: 15px;
            }
        }