* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #0066cc;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #004d99;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        header {
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }
        .logo a {
            font-size: 2.5rem;
            font-weight: bold;
            color: white;
            font-family: 'Arial Black', sans-serif;
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .logo a:hover {
            text-shadow: 0 0 10px #4fc3f7;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        .nav-desktop a:hover {
            background-color: rgba(255,255,255,0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #1e3c72;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .nav-mobile a:hover {
            background-color: rgba(255,255,255,0.1);
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background-color: #e9ecef;
            font-size: 0.9rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #0066cc;
        }
        .search-container {
            padding: 1rem 2rem;
            background-color: white;
            border-bottom: 1px solid #ddd;
            max-width: 1200px;
            margin: 0 auto;
        }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid #0066cc;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
        }
        .search-button {
            padding: 0.8rem 1.5rem;
            background-color: #0066cc;
            color: white;
            border: none;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        .search-button:hover {
            background-color: #004d99;
        }
        main {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.05);
            overflow: hidden;
        }
        article {
            padding: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1e3c72;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #4fc3f7;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2a5298;
            margin: 2rem 0 1rem;
            padding-left: 0.5rem;
            border-left: 5px solid #4fc3f7;
        }
        h3 {
            font-size: 1.8rem;
            color: #3b5998;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
            margin: 1rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border-left: 4px solid #0066cc;
        }
        .bold {
            font-weight: bold;
            color: #1e3c72;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .featured-image {
            float: right;
            margin: 0 0 1.5rem 1.5rem;
            max-width: 400px;
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        }
        .content-links {
            color: #0066cc;
            font-weight: 500;
        }
        .content-links:hover {
            text-decoration: underline;
        }
        .user-interaction {
            margin: 3rem 0;
            padding: 2rem;
            background-color: #f1f8ff;
            border-radius: 10px;
            border: 1px solid #cce7ff;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
            color: #333;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #0066cc;
            outline: none;
        }
        .submit-button {
            background-color: #0066cc;
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s ease;
        }
        .submit-button:hover {
            background-color: #004d99;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            color: #ffc107;
            cursor: pointer;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        footer {
            background-color: #1e3c72;
            color: white;
            padding: 2rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #4fc3f7;
            margin-bottom: 1rem;
            font-size: 1.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.5rem;
        }
        friend-link a {
            color: #cce7ff;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255,255,255,0.2);
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1rem;
                right: 2rem;
            }
            .breadcrumb, .search-container, main {
                padding: 1rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .featured-image {
                float: none;
                margin: 1rem auto;
                max-width: 100%;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
        }