* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #4361ee;
            --secondary: #3a0ca3;
            --accent: #f72585;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --success: #4cc9f0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f5f7ff;
            color: var(--dark);
            line-height: 1.6;
            font-size: 16px;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--secondary);
            margin-bottom: 1rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-top: 1rem;
        }
        h2 {
            font-size: 2rem;
            border-left: 5px solid var(--accent);
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary);
            margin-top: 1.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #555;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .my-logo span {
            color: var(--accent);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav a {
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 5px;
            position: relative;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: var(--transition);
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
        }
        main {
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 40px;
            margin: 30px auto;
        }
        .content-area {
            background: white;
            padding: 35px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        aside {
            background: white;
            padding: 25px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar-section {
            margin-bottom: 30px;
        }
        .card {
            background: #f8f9ff;
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 25px;
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        .info-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-radius: var(--radius);
            padding: 20px;
            margin: 25px 0;
            border: 1px solid #d1c4e9;
        }
        ul, ol {
            padding-left: 25px;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        .article-img {
            width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 25px 0;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -15px;
            margin-bottom: 25px;
            font-size: 0.9rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            background: white;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        th, td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        th {
            background: linear-gradient(var(--primary), var(--secondary));
            color: white;
            font-weight: 600;
        }
        tr:hover {
            background-color: #f5f5f5;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: white;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            text-align: center;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
            min-height: 44px;
            min-width: 44px;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(67, 97, 238, 0.3);
            text-decoration: none;
            color: white;
        }
        .btn-accent {
            background: linear-gradient(90deg, var(--accent), #ff4d6d);
        }
        .btn-small {
            padding: 10px 20px;
            font-size: 0.9rem;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }
        input, textarea, select {
            width: 100%;
            padding: 14px;
            border: 2px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .star {
            color: #ddd;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .social-share {
            display: flex;
            gap: 15px;
            margin: 25px 0;
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            color: white;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .facebook { background: #3b5998; }
        .twitter { background: #1da1f2; }
        .pinterest { background: #e60023; }
        .reddit { background: #ff4500; }
        .social-icon:hover {
            transform: translateY(-5px);
            opacity: 0.9;
        }
        footer {
            background: linear-gradient(135deg, var(--secondary), #1a1a40);
            color: white;
            padding: 50px 0 25px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 20px;
            border-left: 0;
            padding-left: 0;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 10px 0;
            color: #ccc;
        }
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 4px 15px rgba(247, 37, 133, 0.4);
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            transition: var(--transition);
        }
        .back-to-top.visible {
            opacity: 1;
        }
        .text-center { text-align: center; }
        .text-accent { color: var(--accent); }
        .bold { font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 3px 6px; border-radius: 4px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            nav {
                width: 100%;
                order: 3;
                margin-top: 15px;
                display: none;
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 0;
            }
            nav li {
                margin-bottom: 0;
            }
            nav a {
                display: block;
                padding: 15px;
                border-bottom: 1px solid #eee;
            }
            .hamburger {
                display: block;
            }
            .content-area {
                padding: 25px 20px;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 480px) {
            .btn {
                width: 100%;
                margin-bottom: 10px;
            }
            .social-share {
                justify-content: center;
                flex-wrap: wrap;
            }
            .container {
                padding: 0 15px;
            }
            .header-content {
                padding: 15px 0;
            }
        }