* {
            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;
            max-width: 100%;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #4361ee;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #3a0ca3;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        header {
            background: linear-gradient(135deg, #3a0ca3 0%, #4361ee 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            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: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #f72585;
        }
        .my-logo span {
            background: linear-gradient(to right, #f72585, #4cc9f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        nav a:hover {
            color: #4cc9f0;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #4cc9f0;
            transition: width 0.3s ease;
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 10px;
            color: #6c757d;
        }
        .breadcrumb a {
            color: #4361ee;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
            background-color: white;
            box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
            border-radius: 10px;
            margin: 2rem auto;
        }
        .article-header {
            text-align: center;
            padding: 2rem 1rem;
            border-bottom: 2px solid #f0f0f0;
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #3a0ca3;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .article-meta i {
            color: #f72585;
        }
        .content {
            padding: 0 2rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #4361ee;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #dee2e6;
        }
        h3 {
            font-size: 1.8rem;
            color: #7209b7;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #f72585;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #fff9db;
            padding: 1.5rem;
            border-left: 5px solid #ffd43b;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        }
        .feature-img img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .feature-img img:hover {
            transform: scale(1.03);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #6c757d;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        ul, ol {
            padding-left: 2rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .interactive-box {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem 0;
            border: 1px solid #dee2e6;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .interactive-box h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #495057;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease, box-shadow 0.3s ease;
        }
        .form-control:focus {
            outline: none;
            border-color: #4361ee;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.25);
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 1.8rem;
            background: linear-gradient(to right, #4361ee, #3a0ca3);
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.3s ease;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(67, 97, 238, 0.3);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star:hover,
        .star.active {
            color: #ffd43b;
        }
        footer {
            background-color: #212529;
            color: #adb5bd;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-col h3 {
            color: #f8f9fa;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid #4361ee;
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #adb5bd;
        }
        .footer-links a:hover {
            color: #4cc9f0;
            padding-left: 5px;
            transition: all 0.3s ease;
        }
        friend-link {
            display: inline-block;
            background-color: #343a40;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            margin: 0.3rem;
            border: 1px solid #495057;
        }
        friend-link a {
            color: #4cc9f0;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #495057;
            font-size: 0.9rem;
            color: #6c757d;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            .content { padding: 0 1.5rem; }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            nav {
                width: 100%;
                order: 3;
                margin-top: 1rem;
                display: none;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 0;
            }
            nav li {
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            nav a {
                display: block;
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .feature-img { width: 95%; }
            .content { padding: 0 1rem; }
        }
        @media (max-width: 576px) {
            .article-meta { flex-direction: column; gap: 0.5rem; }
            .breadcrumb ol { justify-content: center; }
            .footer-container { grid-template-columns: 1fr; }
        }