* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #0f1a20;
            color: #e0e0e0;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4dabf7;
            text-decoration: none;
            transition: color 0.3s, background-color 0.3s;
        }
        a:hover {
            color: #a5d8ff;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, #1e5799 0%, #207cca 100%);
            color: white;
            padding: 12px 24px;
            border-radius: 6px;
            border: none;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }
        .btn:hover {
            background: linear-gradient(135deg, #207cca 0%, #1e5799 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.2);
            text-decoration: none;
        }
        header {
            background: rgba(15, 26, 32, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1c3b4a;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(90deg, #ff9a00, #ff5500);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo a:hover {
            text-decoration: none;
        }
        .search-box {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-box input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #2a4d5e;
            border-radius: 6px 0 0 6px;
            background-color: #1a2d35;
            color: #e0e0e0;
            font-size: 1rem;
        }
        .search-box button {
            background-color: #2a4d5e;
            color: white;
            border: 1px solid #2a4d5e;
            border-left: none;
            border-radius: 0 6px 6px 0;
            padding: 0 20px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .search-box button:hover {
            background-color: #3a6d8a;
        }
        nav {
            background-color: #14232b;
            padding: 0;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        .main-nav {
            display: flex;
            list-style: none;
        }
        .main-nav li {
            position: relative;
        }
        .main-nav a {
            display: block;
            padding: 18px 22px;
            color: #b0d0e8;
            font-weight: 500;
            text-decoration: none;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #ff9a00;
            background-color: rgba(255,154,0,0.05);
            border-bottom-color: #ff9a00;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #b0d0e8;
            cursor: pointer;
            padding: 10px;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #8a9ba8;
            background-color: #0c151a;
        }
        .breadcrumb a {
            color: #8a9ba8;
        }
        .breadcrumb a:hover {
            color: #ff9a00;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        article {
            background-color: #1a2d35;
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
            border: 1px solid #2a4d5e;
        }
        h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            color: #ff9a00;
            line-height: 1.2;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }
        h2 {
            font-size: 2.4rem;
            margin: 45px 0 20px;
            color: #4dabf7;
            border-bottom: 2px solid #2a4d5e;
            padding-bottom: 10px;
        }
        h3 {
            font-size: 1.8rem;
            margin: 35px 0 15px;
            color: #a5d8ff;
        }
        h4 {
            font-size: 1.4rem;
            margin: 25px 0 10px;
            color: #c8e6ff;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background-color: rgba(255,154,0,0.1);
            border-left: 4px solid #ff9a00;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .image-container {
            margin: 30px auto;
            text-align: center;
            max-width: 800px;
        }
        .image-container img {
            border-radius: 10px;
            border: 2px solid #3a6d8a;
            box-shadow: 0 8px 20px rgba(0,0,0,0.4);
        }
        .image-caption {
            font-style: italic;
            color: #8a9ba8;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .link-list {
            background-color: #14232b;
            padding: 25px;
            border-radius: 10px;
            margin: 30px 0;
        }
        .link-list h3 {
            margin-top: 0;
        }
        .link-list ul {
            list-style: none;
            columns: 2;
        }
        .link-list li {
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }
        .link-list li:before {
            content: '🔗';
            position: absolute;
            left: 0;
        }
        .tool-section {
            background-color: #0c151a;
            border-radius: 12px;
            padding: 30px;
            margin: 40px 0;
            border: 1px solid #2a4d5e;
        }
        .tool-title {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 25px;
        }
        .tool-title i {
            font-size: 2.5rem;
            color: #ff9a00;
        }
        .code-area {
            width: 100%;
            min-height: 200px;
            background-color: #0a1219;
            color: #e0e0e0;
            border: 1px solid #2a4d5e;
            border-radius: 8px;
            padding: 20px;
            font-family: monospace;
            font-size: 1rem;
            resize: vertical;
            margin-bottom: 20px;
        }
        .tool-buttons {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        .result-area {
            margin-top: 30px;
            padding: 20px;
            background-color: #14232b;
            border-radius: 8px;
            border-left: 4px solid #4dabf7;
            display: none;
        }
        .user-feedback {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 2px solid #2a4d5e;
        }
        .rating-system {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .stars i {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.3s;
        }
        .stars i:hover,
        .stars i.active {
            color: #ff9a00;
        }
        .comment-form textarea {
            width: 100%;
            min-height: 150px;
            padding: 15px;
            background-color: #0a1219;
            color: #e0e0e0;
            border: 1px solid #2a4d5e;
            border-radius: 8px;
            margin-bottom: 20px;
            resize: vertical;
        }
        .comment-form .form-row {
            display: flex;
            gap: 20px;
            margin-bottom: 20px;
        }
        .comment-form input {
            flex: 1;
            padding: 12px 15px;
            background-color: #0a1219;
            color: #e0e0e0;
            border: 1px solid #2a4d5e;
            border-radius: 8px;
        }
        footer {
            background-color: #0c151a;
            padding: 40px 0 20px;
            margin-top: 60px;
            border-top: 2px solid #1c3b4a;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: #ff9a00;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        friend-link {
            display: block;
            padding: 15px;
            background-color: #14232b;
            border-radius: 8px;
            margin-bottom: 15px;
            border-left: 4px solid #4dabf7;
            transition: transform 0.3s;
        }
        friend-link:hover {
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a4d5e;
            color: #8a9ba8;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.2rem; }
            .link-list ul { columns: 1; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #14232b;
                flex-direction: column;
                display: none;
                box-shadow: 0 10px 20px rgba(0,0,0,0.5);
                border-radius: 0 0 10px 10px;
                z-index: 999;
            }
            .main-nav.active { display: flex; }
            .main-nav a { padding: 15px 20px; border-bottom: 1px solid #2a4d5e; }
            .header-top { flex-direction: column; gap: 20px; }
            .search-box { max-width: 100%; }
            .comment-form .form-row { flex-direction: column; }
            article, .tool-section { padding: 25px; }
        }
        @media (max-width: 576px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .container { padding: 0 15px; }
            .tool-buttons { flex-direction: column; }
            .btn { width: 100%; text-align: center; }
        }