* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #0f1419;
            color: #e0e0e0;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: #00b4d8;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #90e0ef;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a1f2e, #0a0e17);
            padding: 20px 0;
            border-bottom: 2px solid #00b4d8;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: #00b4d8;
            text-shadow: 0 0 10px rgba(0, 180, 216, 0.5);
            letter-spacing: 1px;
        }
        .logo a:hover {
            color: #90e0ef;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav ul li a {
            font-size: 1.1rem;
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 5px;
        }
        nav ul li a:hover {
            background-color: #00b4d8;
            color: #0f1419;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #00b4d8;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.95rem;
            color: #a0a0a0;
        }
        .breadcrumb a {
            color: #a0a0a0;
        }
        .breadcrumb a:hover {
            color: #00b4d8;
        }
        .breadcrumb span {
            margin: 0 8px;
        }
        main {
            padding: 40px 0;
            background-color: #151a23;
            border-radius: 10px;
            margin-top: 20px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }
        article {
            padding: 0 30px;
        }
        h1 {
            font-size: 3.2rem;
            color: #00b4d8;
            margin-bottom: 25px;
            text-align: center;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.4rem;
            color: #4cc9f0;
            margin: 40px 0 20px;
            border-left: 5px solid #00b4d8;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.9rem;
            color: #90e0ef;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.5rem;
            color: #caf0f8;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 25px;
            font-size: 1.2rem;
            text-align: justify;
            padding: 0 10px;
        }
        .highlight {
            background-color: #1e2a3a;
            border-left: 4px solid #00b4d8;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .bold {
            font-weight: 800;
            color: #ffffff;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 8px;
        }
        .image-container {
            text-align: center;
            margin: 40px 0;
        }
        .image-container img {
            max-width: 90%;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
            border: 2px solid #00b4d8;
        }
        .image-container figcaption {
            margin-top: 10px;
            font-style: italic;
            color: #a0a0a0;
        }
        .functional-sections {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .functional-box {
            background: linear-gradient(145deg, #1c2230, #161b26);
            padding: 25px;
            border-radius: 12px;
            border: 1px solid #2a3441;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .functional-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 180, 216, 0.2);
        }
        .functional-box h3 {
            margin-top: 0;
            color: #00b4d8;
        }
        .functional-box form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .functional-box input, .functional-box textarea, .functional-box select {
            padding: 12px;
            border-radius: 6px;
            border: 1px solid #2a3441;
            background-color: #0f1419;
            color: #e0e0e0;
            font-size: 1rem;
        }
        .functional-box button {
            padding: 12px;
            background: linear-gradient(90deg, #00b4d8, #0077b6);
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 700;
            font-size: 1.1rem;
            transition: background 0.3s ease;
        }
        .functional-box button:hover {
            background: linear-gradient(90deg, #0077b6, #00b4d8);
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .rating i {
            color: #ffd700;
            font-size: 1.5rem;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating i:hover {
            color: #ffed4e;
        }
        footer {
            background-color: #0a0e17;
            padding: 40px 0 20px;
            margin-top: 50px;
            border-top: 2px solid #00b4d8;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        friend-link {
            display: block;
            width: 100%;
            margin-bottom: 30px;
        }
        .friend-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            width: 100%;
            max-width: 800px;
        }
        .friend-links a {
            background-color: #1a1f2e;
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }
        .friend-links a:hover {
            background-color: #00b4d8;
            color: #0f1419;
        }
        .copyright {
            margin-top: 30px;
            text-align: center;
            color: #a0a0a0;
            font-size: 0.9rem;
            border-top: 1px solid #2a3441;
            padding-top: 20px;
            width: 100%;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo {
                margin-bottom: 20px;
            }
            nav ul {
                flex-direction: column;
                gap: 15px;
                display: none;
                width: 100%;
                background-color: #1a1f2e;
                padding: 20px;
                border-radius: 10px;
                margin-top: 20px;
            }
            nav ul.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;
            }
            h4 {
                font-size: 1.3rem;
            }
            p {
                font-size: 1.1rem;
                padding: 0;
            }
            .functional-sections {
                grid-template-columns: 1fr;
            }
            article {
                padding: 0 15px;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .logo a {
                font-size: 1.8rem;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: #00b4d8;
            color: #0f1419;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(0, 180, 216, 0.4);
            transition: all 0.3s ease;
            z-index: 999;
        }
        .scroll-top:hover {
            background-color: #90e0ef;
            transform: scale(1.1);
        }