* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #e6e6e6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #4dabf7; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #a5d8ff; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        header {
            background: rgba(10, 25, 47, 0.95);
            padding: 1rem 2rem;
            border-bottom: 3px solid #00b4d8;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, #00b4d8, #90e0ef);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 5px rgba(0, 180, 216, 0.3);
        }
        .my-logo:hover { text-decoration: none; }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #caf0f8;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }
        nav a:hover {
            background: rgba(0, 180, 216, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: #90e0ef;
            cursor: pointer;
            background: none;
            border: none;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background: rgba(30, 58, 138, 0.7);
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }
        .breadcrumb a { color: #bbd0ff; }
        .breadcrumb a:hover { color: #ffddd2; }
        main {
            flex: 1;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            width: 100%;
        }
        article {
            background: rgba(25, 25, 35, 0.9);
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            margin-bottom: 2rem;
        }
        h1, h2, h3, h4 {
            color: #90e0ef;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 3.5rem;
            text-align: center;
            border-bottom: 3px solid #00b4d8;
            padding-bottom: 1rem;
            margin-top: 0;
        }
        h2 { font-size: 2.5rem; color: #4dabf7; }
        h3 { font-size: 2rem; color: #a5d8ff; }
        h4 { font-size: 1.5rem; color: #bbd0ff; }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 300;
            color: #ffddd2;
            margin-bottom: 2rem;
        }
        .highlight {
            background: rgba(0, 180, 216, 0.15);
            border-left: 5px solid #00b4d8;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        strong { color: #ffb4a2; }
        em { color: #cdb4db; }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 10px;
            border: 3px solid #00b4d8;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.7);
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.02);
        }
        .form-section {
            background: rgba(10, 25, 47, 0.8);
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            color: #a5d8ff;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #4dabf7;
            border-radius: 5px;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #90e0ef;
            box-shadow: 0 0 10px rgba(144, 224, 239, 0.5);
        }
        button {
            background: linear-gradient(90deg, #00b4d8, #0077b6);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 5px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        button:hover {
            background: linear-gradient(90deg, #0077b6, #00b4d8);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 180, 216, 0.4);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input { display: none; }
        .rating label {
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label { color: #ffd700; }
        footer {
            background: rgba(10, 25, 47, 0.95);
            padding: 3rem 2rem;
            border-top: 3px solid #00b4d8;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #90e0ef;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            padding: 0.8rem;
            background: rgba(144, 224, 239, 0.1);
            border-radius: 5px;
            margin-bottom: 0.8rem;
            transition: background 0.3s ease;
        }
        friend-link:hover {
            background: rgba(144, 224, 239, 0.3);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #4dabf7;
            margin-top: 2rem;
            color: #bbd0ff;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.2rem; }
            nav ul { gap: 1rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(10, 25, 47, 0.98);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                border-top: 2px solid #00b4d8;
            }
            nav ul.active { display: flex; }
            .hamburger { display: block; }
            article { padding: 2rem; }
            .feature-img { width: 100%; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            main, .breadcrumb { padding: 0 1rem; }
            article { padding: 1.5rem; }
        }