* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #2c3e50;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            min-height: 100vh;
            padding-bottom: 60px;
        }
        a { text-decoration: none; color: #2980b9; transition: color 0.3s; }
        a:hover { color: #e74c3c; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 95%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            color: white;
            padding: 1.5rem 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;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 2px;
            color: #fff;
            text-transform: uppercase;
            background: linear-gradient(to right, #ffd700, #ffed4e);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo:hover { color: #ffed4e; }
        nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
            flex-wrap: wrap;
        }
        nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            font-size: 1.05rem;
        }
        nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #ffd700;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .mobile-nav {
            display: none;
            width: 100%;
            background: #1a2980;
            padding: 1rem;
            margin-top: 1rem;
            border-radius: 8px;
        }
        .mobile-nav.active { display: block; }
        .mobile-nav ul { flex-direction: column; gap: 0.8rem; }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.95rem;
            color: #7f8c8d;
            background: #f8f9fa;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a { color: #3498db; }
        .breadcrumb span { color: #95a5a6; }
        main {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 2.5rem;
            margin: 2rem auto;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2980;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #26d0ce;
            padding-bottom: 0.5rem;
        }
        h2 { font-size: 2rem; color: #2c3e50; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #ecf0f1; }
        h3 { font-size: 1.6rem; color: #34495e; margin: 2rem 0 0.8rem; }
        h4 { font-size: 1.3rem; color: #5d6d7e; margin: 1.5rem 0 0.6rem; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; text-align: justify; }
        .highlight { background: #fffacd; padding: 0.2rem 0.5rem; border-radius: 3px; font-weight: 600; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .last-updated {
            text-align: right;
            font-style: italic;
            color: #7f8c8d;
            margin-bottom: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ddd;
        }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            border: 5px solid #fff;
        }
        .feature-img img { transition: transform 0.5s ease; }
        .feature-img:hover img { transform: scale(1.03); }
        .content-link {
            color: #e74c3c;
            border-bottom: 1px dashed #e74c3c;
            font-weight: 600;
        }
        .content-link:hover { color: #c0392b; border-bottom-style: solid; }
        .module {
            background: #f8f9fa;
            border-left: 5px solid #3498db;
            padding: 1.5rem;
            margin: 2.5rem 0;
            border-radius: 0 8px 8px 0;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .module h3 { margin-top: 0; color: #2980b9; }
        form { display: grid; gap: 1rem; margin-top: 1rem; }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            width: 100%;
        }
        button {
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 1rem;
            justify-self: start;
        }
        button:hover {
            background: linear-gradient(to right, #26d0ce, #1a2980);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .rating { display: flex; gap: 0.5rem; margin-top: 0.5rem; }
        .rating input { display: none; }
        .rating label { font-size: 2rem; color: #ddd; cursor: pointer; }
        .rating label:hover, .rating label:hover ~ label { color: #ffd700; }
        .rating input:checked ~ label { color: #ffd700; }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #ffd700;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            color: #3498db;
            margin-bottom: 0.5rem;
            padding: 0.3rem 0;
            border-bottom: 1px dotted #4a6572;
        }
        friend-link:hover { color: #ffd700; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a6572;
            font-size: 0.95rem;
            color: #bdc3c7;
        }
        @media (max-width: 768px) {
            .header-content { flex-direction: column; align-items: flex-start; }
            nav ul { display: none; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            main { padding: 1.5rem; }
            .feature-img { width: 100%; }
            .module { padding: 1.2rem; }
            .footer-content { grid-template-columns: 1fr; }
        }