* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f9f9f9;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            text-decoration: none;
            color: #1a73e8;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #0d47a1;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 10px;
        }
        header {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            color: white;
            padding: 20px 0;
            border-bottom-left-radius: 15px;
            border-bottom-right-radius: 15px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 2.5rem;
            font-weight: 800;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .logo a:hover {
            text-decoration: none;
            color: #ffcc00;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links li a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 10px 15px;
            border-radius: 8px;
            transition: background 0.3s ease;
        }
        .nav-links li a:hover {
            background: rgba(255, 255, 255, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.95rem;
            color: #666;
            background: #f1f1f1;
            border-radius: 8px;
            margin-bottom: 30px;
            padding-left: 20px;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #1a73e8;
        }
        main {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            margin-bottom: 40px;
        }
        h1 {
            font-size: 3rem;
            color: #1a237e;
            margin-bottom: 30px;
            border-left: 8px solid #6a11cb;
            padding-left: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: #283593;
            margin-top: 50px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid #2575fc;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin-top: 35px;
            margin-bottom: 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: #5c6bc0;
            margin-top: 25px;
            margin-bottom: 10px;
        }
        p {
            margin-bottom: 25px;
            font-size: 1.15rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);
            padding: 25px;
            border-radius: 12px;
            margin: 30px 0;
            border-left: 6px solid #1a73e8;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 8px;
        }
        .bold {
            font-weight: 800;
            color: #1a237e;
        }
        .feature-img {
            width: 80%;
            margin: 40px auto;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }
        .form-section {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 12px;
            margin: 40px 0;
            border: 2px dashed #6a11cb;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #333;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #6a11cb;
            outline: none;
        }
        button {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(106, 17, 203, 0.4);
        }
        .rating {
            display: flex;
            gap: 10px;
            margin-top: 10px;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ffcc00;
            cursor: pointer;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 40px 20px;
            border-top-left-radius: 15px;
            border-top-right-radius: 15px;
            margin-top: 50px;
        }
        .friend-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            transition: background 0.3s ease;
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 0.95rem;
            color: #ccc;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            .nav-links { gap: 15px; }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo a { font-size: 2rem; }
            .hamburger {
                display: block;
                position: absolute;
                top: 30px;
                right: 20px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(26, 35, 126, 0.95);
                border-radius: 10px;
                padding: 20px;
                margin-top: 20px;
            }
            .nav-links.active {
                display: flex;
            }
            .breadcrumb { padding-left: 10px; font-size: 0.85rem; }
            main { padding: 25px; }
            .feature-img { width: 100%; }
        }
        @media (max-width: 480px) {
            body { padding: 0 10px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            p { font-size: 1rem; }
            .form-section { padding: 20px; }
        }