* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #3a86ff;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #2667cc;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a2980, #26d0ce);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            letter-spacing: 2px;
            font-family: 'Courier New', monospace;
            background: linear-gradient(to right, #ffd166, #ef476f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo a:hover {
            opacity: 0.9;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 2rem;
        }
        nav ul li a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        nav ul li a:hover {
            background-color: rgba(255, 255, 255, 0.15);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin: 0 10px;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #495057;
        }
        .breadcrumb a:hover {
            color: #1a2980;
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background-color: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2980;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #3a86ff;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #26547c;
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.6rem;
            color: #3a86ff;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #ef476f;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: #495057;
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: #f1f8ff;
            border-left: 5px solid #3a86ff;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .feature-img figcaption {
            text-align: center;
            font-style: italic;
            color: #6c757d;
            padding: 0.8rem;
            background-color: #f8f9fa;
        }
        .interactive-section {
            background: linear-gradient(to bottom right, #e9f5ff, #ffffff);
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #cce5ff;
        }
        .interactive-section h3 {
            color: #1a2980;
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #26547c;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 2px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3a86ff;
            box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.2);
        }
        button {
            background: linear-gradient(to right, #3a86ff, #2667cc);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        button:hover {
            background: linear-gradient(to right, #2667cc, #1a2980);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
            margin: 0;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ffc107;
        }
        footer {
            background-color: #26547c;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffd166;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cce5ff;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255,255,255,0.1);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            margin-right: 0.8rem;
            margin-bottom: 0.8rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #cce5ff;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #1a2980;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 0;
                text-align: center;
            }
            nav ul li a {
                display: block;
                padding: 1rem;
                margin: 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            article {
                padding: 1.5rem;
            }
            .feature-img {
                width: 100%;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }