* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f0f9ff; 
            color: #1a365d; 
            line-height: 1.7;
            max-width: 1400px;
            margin: 0 auto;
            box-shadow: 0 0 25px rgba(0, 100, 200, 0.08);
        }
        a {
            color: #2b6cb0;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: #1a202c;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #2d3748 100%);
            color: white;
            padding: 1.2rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(to right, #63b3ed, #90cdf4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .nav-container {
            display: flex;
            align-items: center;
        }
        .main-nav {
            display: flex;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: #e2e8f0;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            color: #4a5568;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #2b6cb0;
        }
        .main-content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem;
        }
        @media (max-width: 992px) {
            .main-content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(66, 153, 225, 0.1);
        }
        .article-meta {
            color: #718096;
            font-size: 0.95rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e2e8f0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .last-updated::before {
            font-family: "Font Awesome 6 Free";
            content: "\f017";
            margin-right: 0.5rem;
            color: #4299e1;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a365d;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 5px solid #4299e1;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2.1rem;
            color: #2d3748;
            margin: 2.5rem 0 1.2rem 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #c6f6d5;
        }
        h3 {
            font-size: 1.7rem;
            color: #2b6cb0;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            font-size: 1.4rem;
            color: #4a5568;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: #2d3748;
            background-color: #ebf8ff;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #4299e1;
            margin-bottom: 2.5rem;
        }
        .highlight-box {
            background: linear-gradient(to right, #c6f6d5, #bee3f8);
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            border: 1px solid #68d391;
        }
        .tip {
            background-color: #fffaf0;
            border-left: 4px solid #dd6b20;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
        }
        .tip::before {
            content: "💡 Pro Tip: ";
            font-weight: bold;
            color: #dd6b20;
        }
        .content-link {
            background-color: #fefcbf;
            padding: 0.1rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .content-link:hover {
            background-color: #f6e05e;
        }
        .article-image {
            margin: 2.5rem auto;
            max-width: 800px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #718096;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(66, 153, 225, 0.1);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar h3 {
            font-size: 1.4rem;
            color: #2d3748;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #4a5568;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #4299e1;
            box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.3);
        }
        .btn {
            background: linear-gradient(to right, #4299e1, #3182ce);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-block;
        }
        .btn:hover {
            background: linear-gradient(to right, #3182ce, #2b6cb0);
            transform: translateY(-2px);
            box-shadow: 0 5px 12px rgba(49, 130, 206, 0.4);
            text-decoration: none;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #cbd5e0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #f6e05e;
        }
        .site-footer {
            background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
            color: #cbd5e0;
            padding: 3rem 2rem 1.5rem;
            margin-top: 3rem;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
        }
        .footer-widgets {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        .footer-widget h4 {
            color: #90cdf4;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 0.8rem;
            margin-bottom: 0.8rem;
            border-radius: 5px;
            border-left: 3px solid #4299e1;
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #2d3748;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                border-top: 1px solid #4a5568;
            }
            .main-nav.active {
                display: flex;
            }
            .main-nav a {
                padding: 0.8rem;
            }
            .main-content-wrapper, .article-content {
                padding: 1.5rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }