* {
            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: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
            color: #f0f0f0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #00b4d8;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.3s ease;
        }
        a:hover {
            color: #90e0ef;
            transform: translateY(-2px);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(15, 32, 39, 0.95);
            backdrop-filter: blur(10px);
            padding: 20px 0;
            border-bottom: 3px solid #00b4d8;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.5rem;
            font-weight: 900;
            color: #00b4d8;
            text-shadow: 0 0 15px rgba(0, 180, 216, 0.7);
            letter-spacing: 2px;
        }
        .logo a:hover {
            color: #90e0ef;
            text-shadow: 0 0 20px rgba(144, 224, 239, 0.9);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links a {
            font-size: 1.1rem;
            font-weight: 600;
            padding: 10px 15px;
            border-radius: 8px;
            background: rgba(32, 58, 67, 0.8);
        }
        .nav-links a:hover {
            background: #00b4d8;
            color: #0f2027;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #00b4d8;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            background: rgba(32, 58, 67, 0.6);
            margin-top: 10px;
        }
        .breadcrumb a {
            color: #90e0ef;
        }
        .breadcrumb span {
            color: #ccc;
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        .article-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .article-container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: rgba(32, 58, 67, 0.9);
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 15px 50px rgba(0, 0, 0, 0.6);
        }
        aside {
            background: rgba(15, 32, 39, 0.9);
            padding: 25px;
            border-radius: 15px;
            height: fit-content;
        }
        h1 {
            font-size: 3.5rem;
            margin-bottom: 25px;
            color: #00b4d8;
            text-align: center;
            text-shadow: 0 5px 15px rgba(0, 180, 216, 0.5);
            line-height: 1.2;
        }
        h2 {
            font-size: 2.5rem;
            margin: 40px 0 20px;
            color: #90e0ef;
            border-left: 5px solid #00b4d8;
            padding-left: 15px;
        }
        h3 {
            font-size: 2rem;
            margin: 30px 0 15px;
            color: #caf0f8;
        }
        h4 {
            font-size: 1.5rem;
            margin: 25px 0 10px;
            color: #ade8f4;
        }
        p {
            margin-bottom: 25px;
            font-size: 1.15rem;
            text-align: justify;
            letter-spacing: 0.3px;
        }
        .highlight {
            background: rgba(0, 180, 216, 0.2);
            padding: 20px;
            border-left: 4px solid #00b4d8;
            margin: 25px 0;
            border-radius: 0 10px 10px 0;
        }
        .emoji {
            font-size: 1.5rem;
            margin-right: 10px;
        }
        .feature-box {
            background: rgba(44, 83, 100, 0.7);
            padding: 25px;
            border-radius: 12px;
            margin: 30px 0;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 180, 216, 0.4);
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin: 30px 0;
        }
        input, textarea, select {
            padding: 15px;
            border: 2px solid #203a43;
            border-radius: 8px;
            background: rgba(15, 32, 39, 0.8);
            color: #f0f0f0;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00b4d8;
        }
        button {
            padding: 15px 30px;
            background: linear-gradient(90deg, #00b4d8, #0077b6);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.3s ease;
        }
        button:hover {
            background: linear-gradient(90deg, #0077b6, #00b4d8);
            transform: scale(1.05);
        }
        .rating {
            display: flex;
            gap: 10px;
            margin: 20px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.3s ease;
        }
        .rating label:hover,
        .rating input:checked ~ label {
            color: #ffd700;
        }
        footer {
            background: rgba(15, 32, 39, 0.95);
            padding: 40px 0 20px;
            border-top: 3px solid #00b4d8;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        friend-link {
            display: block;
            padding: 12px;
            background: rgba(32, 58, 67, 0.8);
            margin: 10px 0;
            border-radius: 8px;
            text-align: center;
            transition: background 0.3s ease;
        }
        friend-link:hover {
            background: #00b4d8;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #203a43;
            color: #90e0ef;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 20px;
                gap: 15px;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 25px;
                right: 20px;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.7rem;
            }
            article, aside {
                padding: 25px;
            }
        }