* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f7fa;
            padding-top: 80px; 
        }
        a {
            text-decoration: none;
            color: #3498db;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1d6fa5;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .header {
            background: linear-gradient(135deg, #1a237e, #283593);
            color: white;
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 700;
            color: #00e5ff;
            text-transform: uppercase;
            letter-spacing: 1px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo:hover {
            color: #00bcd4;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-menu a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-menu a:hover {
            border-bottom: 2px solid #00e5ff;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background: #e3f2fd;
            padding: 0.8rem 2rem;
            margin-bottom: 2rem;
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb-item {
            margin-right: 0.5rem;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .main-content {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.5rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #00e5ff;
        }
        h3 {
            font-size: 1.5rem;
            color: #3949ab;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #5c6bc0;
            margin: 1rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background: #e3f2fd;
            padding: 1rem;
            border-left: 4px solid #3498db;
            margin: 1.5rem 0;
            border-radius: 0 5px 5px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-family: inherit;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #3498db;
            outline: none;
        }
        button {
            background: #3498db;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        button:hover {
            background: #1d6fa5;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            color: #ccc;
            cursor: pointer;
            font-size: 1.5rem;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .comment {
            border: 1px solid #eee;
            padding: 1rem;
            margin-bottom: 1rem;
            border-radius: 5px;
        }
        .comment-author {
            font-weight: bold;
            color: #1a237e;
        }
        .comment-date {
            color: #777;
            font-size: 0.9rem;
        }
        .footer {
            background: #1a237e;
            color: white;
            padding: 2rem;
            margin-top: 3rem;
            text-align: center;
        }
        .friend-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .friend-link {
            background: #283593;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            color: white;
        }
        .friend-link:hover {
            background: #3949ab;
        }
        .copyright {
            margin-top: 1.5rem;
            font-size: 0.9rem;
            color: #b0bec5;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                gap: 1rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                flex-direction: column;
                background: #1a237e;
                width: 100%;
                text-align: center;
                padding: 1rem 0;
                transition: 0.3s;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .nav-menu.active {
                left: 0;
            }
            .nav-menu li {
                margin: 0.5rem 0;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .container {
                padding: 0 1rem;
            }
            .main-content, .sidebar {
                padding: 1.5rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }
        .last-updated {
            font-style: italic;
            color: #777;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }