* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #0f172a;
            color: #e2e8f0;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: #60a5fa;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #3b82f6;
        }
        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, #1e293b, #0f172a);
            padding: 1rem 0;
            border-bottom: 2px solid #334155;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: bold;
            background: linear-gradient(90deg, #f59e0b, #ef4444);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
        }
        .nav-links a:hover {
            background-color: #334155;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #f59e0b;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        .breadcrumb a {
            color: #cbd5e1;
        }
        main {
            padding: 2rem 0;
        }
        article {
            background-color: #1e293b;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 10px 25px rgba(0,0,0,0.5);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #fbbf24;
            margin-bottom: 1.5rem;
            text-align: center;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #60a5fa;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #334155;
        }
        h3 {
            font-size: 1.5rem;
            color: #34d399;
            margin: 1.5rem 0 1rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #a78bfa;
            margin: 1rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        strong {
            color: #fbbf24;
            font-weight: 700;
        }
        .highlight {
            background-color: #334155;
            padding: 1.5rem;
            border-left: 4px solid #f59e0b;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: #334155;
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: #60a5fa;
            margin-bottom: 1rem;
        }
        form {
            background-color: #334155;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            margin: 0.5rem 0 1rem;
            border: 1px solid #475569;
            border-radius: 6px;
            background-color: #1e293b;
            color: #e2e8f0;
        }
        button {
            background: linear-gradient(90deg, #3b82f6, #8b5cf6);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: opacity 0.3s ease;
        }
        button:hover {
            opacity: 0.9;
        }
        footer {
            background-color: #0f172a;
            padding: 2rem 0;
            border-top: 2px solid #334155;
            text-align: center;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            font-size: 1.1rem;
        }
        .copyright {
            color: #94a3b8;
            font-size: 0.9rem;
            margin-top: 1.5rem;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1e293b;
                padding: 1rem;
                border-top: 1px solid #334155;
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .header-content {
                flex-direction: column;
                gap: 1rem;
            }
            .features {
                grid-template-columns: 1fr;
            }
        }