:root {
            --primary-color: #0d1b2a;
            --secondary-color: #1b263b;
            --accent-color: #ff9e00;
            --text-color: #e0e1dd;
            --highlight-color: #415a77;
            --padding: 20px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--primary-color);
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: #ffcc80;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--padding);
        }
        header {
            background-color: var(--secondary-color);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 6px rgba(0,0,0,0.3);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: bold;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #ffcc80;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 1.1rem;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--accent-color);
        }
        .breadcrumb {
            padding: 10px 0;
            font-size: 0.9rem;
            background-color: var(--highlight-color);
            margin-top: 5px;
        }
        .breadcrumb a::after {
            content: " > ";
            margin: 0 5px;
            color: var(--text-color);
        }
        .breadcrumb a:last-child::after {
            content: "";
        }
        main {
            padding: 30px 0;
            background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
        }
        article {
            background-color: rgba(27, 38, 59, 0.8);
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.5);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--accent-color);
            margin-bottom: 20px;
            text-align: center;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2.2rem;
            color: #ffcc80;
            margin-top: 30px;
            margin-bottom: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: #a3b18a;
            margin-top: 25px;
            margin-bottom: 10px;
        }
        h4 {
            font-size: 1.4rem;
            color: #90be6d;
            margin-top: 20px;
            margin-bottom: 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 158, 0, 0.1);
            border-left: 4px solid var(--accent-color);
            padding: 15px;
            margin: 20px 0;
            font-weight: bold;
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 25px auto;
            border-radius: 10px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.7);
            border: 3px solid var(--accent-color);
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }
        .feature-card {
            background-color: var(--highlight-color);
            padding: 20px;
            border-radius: 10px;
            text-align: center;
            transition: transform 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            background-color: #4a6fa5;
        }
        .feature-card i {
            font-size: 2.5rem;
            color: var(--accent-color);
            margin-bottom: 15px;
        }
        .form-section {
            margin: 40px 0;
            padding: 25px;
            background-color: var(--secondary-color);
            border-radius: 10px;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 600px;
            margin: 0 auto;
        }
        input, textarea, select {
            padding: 12px;
            border-radius: 5px;
            border: 2px solid var(--highlight-color);
            background-color: var(--primary-color);
            color: var(--text-color);
            font-size: 1rem;
        }
        button {
            padding: 12px 25px;
            background-color: var(--accent-color);
            color: var(--primary-color);
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1.1rem;
            transition: background-color 0.3s;
        }
        button:hover {
            background-color: #ffcc80;
        }
        footer {
            background-color: var(--secondary-color);
            padding: 40px 0 20px;
            text-align: center;
            margin-top: 50px;
        }
        friend-link {
            display: block;
            margin: 20px 0;
            font-size: 1.2rem;
        }
        .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--highlight-color);
            font-size: 0.9rem;
            color: #ccc;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--secondary-color);
                position: absolute;
                top: 70px;
                left: 0;
                padding: 20px;
                box-shadow: 0 4px 6px rgba(0,0,0,0.3);
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            article {
                padding: 20px;
            }
        }