* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #0f1a2c;
            color: #e0e0e0;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #4dabf7;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b6b;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a2b4c 0%, #0f1a2c 100%);
            padding: 20px 0;
            border-bottom: 3px solid #ff6b6b;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            color: #ff6b6b;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 2px;
        }
        .my-logo span {
            color: #4dabf7;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            color: #e0e0e0;
            font-weight: 600;
            padding: 10px 15px;
            border-radius: 5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a:hover {
            background-color: #1e3a5f;
            color: #ff6b6b;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #e0e0e0;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: #1a2b4c;
            padding: 20px;
            border-top: 2px solid #ff6b6b;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: 15px;
            border-bottom: 1px solid #2a3f66;
            color: #e0e0e0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mobile-nav a:hover {
            background-color: #2a3f66;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #1a2b4c;
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: #4dabf7;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: #e0e0e0;
        }
        main {
            padding: 40px 0;
            background-color: #0f1a2c;
        }
        article {
            background: rgba(26, 43, 76, 0.8);
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
            margin-bottom: 40px;
        }
        h1 {
            font-size: 3.5rem;
            color: #ff6b6b;
            margin-bottom: 25px;
            text-align: center;
            line-height: 1.2;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.7);
        }
        h2 {
            font-size: 2.5rem;
            color: #4dabf7;
            margin: 40px 0 20px;
            border-left: 5px solid #ff6b6b;
            padding-left: 15px;
        }
        h3 {
            font-size: 2rem;
            color: #a5d8ff;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: #c0c0c0;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: #2a3f66;
            padding: 20px;
            border-left: 4px solid #ff6b6b;
            margin: 25px 0;
            border-radius: 0 10px 10px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .feature-img {
            width: 80%;
            margin: 30px auto;
            border-radius: 10px;
            overflow: hidden;
            border: 3px solid #4dabf7;
        }
        .feature-img img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .feature-img img:hover {
            transform: scale(1.03);
        }
        .functionality {
            background-color: #1a2b4c;
            padding: 30px;
            border-radius: 10px;
            margin: 40px 0;
        }
        .functionality h2 {
            border-left: none;
            text-align: center;
            color: #ff6b6b;
        }
        .functionality form {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            max-width: 600px;
            margin: 0 auto;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            margin-bottom: 8px;
            font-weight: 600;
            color: #a5d8ff;
        }
        input, textarea, select {
            padding: 15px;
            border-radius: 8px;
            border: 2px solid #2a3f66;
            background-color: #0f1a2c;
            color: #e0e0e0;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #4dabf7;
            outline: none;
        }
        button {
            padding: 15px 30px;
            background: linear-gradient(90deg, #ff6b6b, #ff8e8e);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            justify-self: center;
        }
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(255, 107, 107, 0.4);
        }
        .rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 2rem;
            color: #ffd700;
            margin: 20px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            cursor: pointer;
            transition: color 0.3s;
        }
        .rating input:checked ~ label {
            color: #ccc;
        }
        footer {
            background-color: #1a2b4c;
            padding: 40px 0 20px;
            border-top: 3px solid #ff6b6b;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: #ff6b6b;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }
        friend-link {
            display: block;
            margin: 10px 0;
            color: #4dabf7;
            font-size: 1.1rem;
        }
        friend-link:hover {
            color: #ff6b6b;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a3f66;
            color: #a5d8ff;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.2rem; }
            h3 { font-size: 1.8rem; }
            .main-nav ul { gap: 15px; }
            .feature-img { width: 90%; }
        }
        @media (max-width: 768px) {
            .header-content { flex-wrap: wrap; }
            .main-nav { display: none; }
            .hamburger { display: block; }
            .mobile-nav.active { display: flex; }
            .footer-content { grid-template-columns: 1fr; }
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.9rem; }
            article { padding: 25px; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .functionality { padding: 20px; }
            button { width: 100%; }
        }