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

        body {
            font-family: 'Raleway', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #fff;
        }

        .site-header {
            background: #fff;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .top-bar {
            background: #f7f7f7;
            padding: 8px 0;
            border-bottom: 1px solid #e5e5e5;
        }

        .grid-main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .top-bar-tools {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .social-icons {
            position: relative;
        }

        .social-icons ul {
            display: flex;
            list-style: none;
            gap: 10px;
        }

        .social-icons li {
            background: #4267b2;
            color: white;
            padding: 8px 12px;
            border-radius: 20px;
            font-size: 12px;
            cursor: pointer;
            transition: background 0.3s;
        }

        .social-icons li:nth-child(2) { background: #1da1f2; }
        .social-icons li:nth-child(3) { background: #e1306c; }
        .social-icons li:nth-child(4) { background: #ff0000; }

        .social-icons li:hover {
            opacity: 0.8;
        }

        .header-resources {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .resources-data {
            color: #666;
            font-size: 14px;
        }

        .resources-button {
            background: #4267b2;
            color: white;
            padding: 6px 16px;
            text-decoration: none;
            border-radius: 4px;
            font-size: 13px;
            font-weight: 600;
            transition: background 0.3s;
        }

        .resources-button:hover {
            background: #365899;
        }

        .site-description {
            color: #666;
            font-size: 13px;
            margin: 0;
        }

        .header-container {
            padding: 15px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .site-logo img {
            max-height: 60px;
            width: auto;
        }

        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
            flex-wrap: wrap;
        }

        .main-nav a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            padding: 10px 0;
            transition: color 0.3s;
            position: relative;
        }

        .main-nav a:hover {
            color: #4267b2;
        }

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

        .main-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        h1 {
            color: #2c3e50;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            text-align: center;
            line-height: 1.2;
        }

        article {
            background: #fff;
            margin-bottom: 40px;
        }

        article h2 {
            color: #34495e;
            font-size: 1.8rem;
            font-weight: 600;
            margin: 30px 0 20px 0;
        }

        article h3 {
            color: #2c3e50;
            font-size: 1.4rem;
            font-weight: 600;
            margin: 25px 0 15px 0;
        }

        article h4 {
            color: #34495e;
            font-size: 1.2rem;
            font-weight: 500;
            margin: 20px 0 10px 0;
        }

        article p {
            margin-bottom: 20px;
            font-size: 16px;
            line-height: 1.7;
            color: #555;
        }

        .transition-section {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 8px;
            margin: 40px 0;
            border-left: 4px solid #4267b2;
        }

        .transition-section p {
            font-size: 16px;
            color: #666;
            margin-bottom: 15px;
        }

        .links-section {
            background: #f7f7f7;
            padding: 40px 30px;
            border-radius: 8px;
            margin-top: 40px;
        }

        .links-section h3 {
            color: #2c3e50;
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #4267b2;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 15px 30px;
            margin-bottom: 40px;
        }

        .links-section li {
            margin-bottom: 8px;
        }

        .links-section a {
            color: #4267b2;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 0;
            display: block;
            transition: all 0.3s;
            border-bottom: 1px solid transparent;
        }

        .links-section a:hover {
            color: #365899;
            border-bottom-color: #365899;
            padding-left: 5px;
        }

        @media (max-width: 968px) {
            .main-nav {
                display: none;
            }

            .menu-toggle {
                display: block;
            }

            .header-container {
                justify-content: space-between;
            }

            .top-bar-tools {
                justify-content: center;
                gap: 10px;
            }

            .social-icons ul {
                gap: 8px;
            }

            .social-icons li {
                padding: 6px 10px;
                font-size: 11px;
            }
        }

        @media (max-width: 600px) {
            .grid-main {
                padding: 0 15px;
            }

            .main-content {
                padding: 30px 15px;
            }

            h1 {
                font-size: 2rem;
                margin-bottom: 25px;
            }

            .links-section {
                padding: 30px 20px;
            }

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

            .transition-section {
                padding: 20px;
            }

            .top-bar-tools {
                flex-direction: column;
                gap: 10px;
            }

            .header-container {
                padding: 10px 0;
            }
        }