:root {
            --primary: #1a365d;
            --secondary: #e63946;
            --accent: #fca311;
            --dark: #14213d;
            --light: #f8f9fa;
            --gray: #6c757d;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
        }
        ul, ol {
            padding-left: 2rem;
            margin: 1rem 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .section {
            padding: 60px 0;
        }
        .text-center { text-align: center; }
        .text-bold { font-weight: 700; }
        .highlight {
            background: linear-gradient(120deg, #ffd166 0%, #ffd166 100%);
            padding: 2px 6px;
            border-radius: 4px;
        }
        header {
            background: var(--dark);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--accent), #ff6b6b);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        nav ul {
            list-style: none;
            display: flex;
            gap: 2rem;
            margin: 0;
        }
        nav a {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
        }
        nav a:hover, nav a.active {
            background: var(--secondary);
            color: white;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: white;
            border-radius: 2px;
        }
        .breadcrumb {
            padding: 15px 0;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .hero {
            background: linear-gradient(rgba(20,33,61,0.9), rgba(20,33,61,0.8)), url('https://images.unsplash.com/photo-1511512578047-dfb367046420?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') no-repeat center/cover;
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        main {
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            margin: 40px auto;
        }
        h1, h2, h3, h4 {
            color: var(--dark);
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 { font-size: 2.8rem; border-bottom: 4px solid var(--accent); padding-bottom: 10px; }
        h2 { font-size: 2.2rem; color: var(--primary); border-left: 5px solid var(--secondary); padding-left: 15px; }
        h3 { font-size: 1.8rem; color: #2a4d8f; }
        h4 { font-size: 1.4rem; color: var(--gray); }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        blockquote {
            border-left: 5px solid var(--accent);
            padding: 20px;
            background: #f8f9fa;
            margin: 2rem 0;
            font-style: italic;
            font-size: 1.2rem;
        }
        .feature-box {
            background: linear-gradient(145deg, #ffffff, #f0f0f0);
            border: 1px solid #dee2e6;
            border-radius: var(--radius);
            padding: 30px;
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ced4da;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(26,54,93,0.2);
        }
        .rating {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .rating input { display: none; }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: var(--accent);
        }
        footer {
            background: var(--dark);
            color: white;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #adb5bd;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 10px 20px;
            border-radius: var(--radius);
            margin: 5px;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #adb5bd;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero h1 { font-size: 2.8rem; }
            h2 { font-size: 2rem; }
            nav ul { gap: 1rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--dark);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav ul.show { display: flex; }
            .header-content { flex-wrap: wrap; }
            .hero h1 { font-size: 2.2rem; }
            main { padding: 25px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .section { padding: 40px 0; }
        }
        @media (max-width: 576px) {
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1.1rem; }
            h1 { font-size: 1.9rem; }
            h2 { font-size: 1.6rem; }
            .container { padding: 0 15px; }
        }