* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #0f172a;
            color: #cbd5e1;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #3b82f6;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #60a5fa;
        }
        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, #1e293b 0%, #0f172a 100%);
            padding: 1rem 0;
            border-bottom: 2px solid #334155;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #3b82f6, #8b5cf6);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
        }
        nav a:hover {
            background-color: #334155;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: #cbd5e1;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .breadcrumb a:not(:last-child)::after {
            content: " › ";
            margin: 0 8px;
            color: #64748b;
        }
        main {
            padding: 2rem 0;
            min-height: 100vh;
        }
        article {
            background: #1e293b;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #f8fafc;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #3b82f6;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #e2e8f0;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #334155;
        }
        h3 {
            font-size: 1.6rem;
            color: #cbd5e1;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #94a3b8;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        strong {
            color: #fbbf24;
            font-weight: 700;
        }
        .highlight-box {
            background: #0f172a;
            border-left: 5px solid #10b981;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 8px;
        }
        .feature-img {
            width: 80%;
            margin: 2rem auto;
            border-radius: 12px;
            overflow: hidden;
            border: 3px solid #334155;
        }
        .interactive-box {
            background: #0f172a;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .interactive-box h3 {
            margin-top: 0;
        }
        form {
            display: grid;
            gap: 1rem;
            margin-top: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border-radius: 6px;
            border: 1px solid #475569;
            background-color: #1e293b;
            color: #cbd5e1;
        }
        button {
            padding: 0.8rem 1.5rem;
            background: linear-gradient(90deg, #3b82f6, #8b5cf6);
            color: white;
            border: none;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s, opacity 0.3s;
        }
        button:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #fbbf24;
            margin: 1rem 0;
        }
        .stars i {
            cursor: pointer;
        }
        footer {
            background: #0f172a;
            padding: 3rem 0 1.5rem;
            border-top: 2px solid #334155;
            text-align: center;
        }
        friend-link {
            display: block;
            margin-bottom: 2rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0 1rem 1rem;
            padding: 0.6rem 1.2rem;
            background: #1e293b;
            border-radius: 6px;
            color: #60a5fa;
        }
        friend-link a:hover {
            background: #334155;
        }
        .copyright {
            color: #64748b;
            font-size: 0.9rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #334155;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.8rem; }
            nav ul { gap: 1rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            nav { order: 3; width: 100%; margin-top: 1rem; display: none; }
            nav.active { display: block; }
            nav ul { flex-direction: column; gap: 0.5rem; }
            .hamburger { display: flex; }
            .feature-img { width: 100%; }
            article { padding: 1.5rem; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .my-logo { font-size: 1.8rem; }
            .interactive-box { padding: 1.5rem; }
        }