* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-red: #E53935;
            --primary-blue: #1E88E5;
            --primary-green: #43A047;
            --primary-yellow: #FDD835;
            --primary-black: #212121;
            --light-gray: #f5f5f5;
            --medium-gray: #757575;
            --dark-gray: #424242;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            background-color: #fff;
            color: var(--dark-gray);
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-red);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight { background-color: #fff9c4; padding: 0 4px; }
        .site-header {
            background: linear-gradient(135deg, var(--primary-red), var(--primary-blue));
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            color: white;
            text-shadow: 2px 2px 0 var(--primary-black);
        }
        .my-logo span:first-child { color: var(--primary-yellow); }
        .my-logo span:last-child { color: var(--primary-green); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            text-decoration: none;
            color: var(--primary-yellow);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary-yellow);
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--light-gray);
            font-size: 0.9rem;
        }
        .breadcrumb a { color: var(--medium-gray); }
        .breadcrumb a:hover { color: var(--primary-blue); }
        .breadcrumb span { color: var(--dark-gray); margin: 0 8px; }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-black);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 5px solid var(--primary-red);
            padding-bottom: 0.5rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-green);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--primary-yellow);
            background-color: var(--primary-black);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin: 1.5rem 0 1rem;
            display: inline-block;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--dark-gray);
            background-color: #e3f2fd;
            padding: 1.5rem;
            border-left: 5px solid var(--primary-blue);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 2rem auto;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 5px solid white;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: var(--medium-gray);
            margin-top: -1rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .content-block {
            background: var(--light-gray);
            padding: 2rem;
            border-radius: 12px;
            margin: 2.5rem 0;
            border-left: 6px solid var(--primary-red);
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.75rem;
        }
        .interactive-module {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            box-shadow: var(--shadow);
            border: 2px solid #e0e0e0;
        }
        .module-title {
            color: var(--primary-red);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .module-title i {
            font-size: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-gray);
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, var(--primary-blue), var(--primary-green));
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, var(--primary-green), var(--primary-blue));
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
            text-decoration: none;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating .star:hover,
        .star-rating .star:hover ~ .star {
            color: #ffc107;
        }
        .star-rating .star.active {
            color: #ffc107;
        }
        .related-links {
            background: #e8f5e9;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .related-links h3 {
            color: #2e7d32;
            margin-top: 0;
            border-top: none;
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .related-links li {
            background: white;
            padding: 0.8rem 1rem;
            border-radius: 6px;
            border-left: 4px solid var(--primary-green);
        }
        .site-footer {
            background-color: var(--primary-black);
            color: #bdbdbd;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-section h4 {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            background: none;
            padding: 0;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #bdbdbd;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: #333;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1.5rem;
        }
        friend-link h4 {
            color: #ffcc00;
            margin-bottom: 1rem;
            background: none;
            padding: 0;
        }
        friend-link a {
            color: #4fc3f7;
            display: inline-block;
            margin-right: 1rem;
            margin-bottom: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #555;
            font-size: 0.9rem;
            color: #9e9e9e;
        }
        .last-updated {
            text-align: right;
            font-size: 0.9rem;
            color: var(--medium-gray);
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        @media (max-width: 992px) {
            .header-container { flex-wrap: wrap; }
            .main-nav { order: 3; width: 100%; margin-top: 1rem; }
            .main-nav ul { justify-content: center; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
                text-align: center;
            }
            .main-nav li {
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.4rem; }
            .lead { font-size: 1.2rem; }
            .footer-container { grid-template-columns: 1fr; text-align: center; }
        }