* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #007bff;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #0056b3;
        }
        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, #1e3c72, #2a5298);
            color: white;
            padding: 15px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 2px;
            background: linear-gradient(to right, #ff7e5f, #feb47b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo:hover {
            transform: scale(1.05);
            transition: transform 0.3s ease;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 15px;
            border-radius: 5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav a:hover {
            background-color: rgba(255,255,255,0.2);
            color: #ffcc00;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e9ecef;
            font-size: 0.95rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: #6c757d;
        }
        main {
            padding: 30px 0;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-top: 20px;
        }
        article {
            padding: 0 20px;
        }
        h1, h2, h3, h4 {
            color: #1e3c72;
            margin-top: 1.5em;
            margin-bottom: 0.5em;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            text-align: center;
            border-bottom: 3px solid #ff7e5f;
            padding-bottom: 15px;
            margin-top: 0;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #2a5298;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            color: #2a5298;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
        }
        p {
            margin-bottom: 1.2em;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fffacd;
            padding: 15px;
            border-left: 4px solid #ffcc00;
            margin: 20px 0;
            border-radius: 5px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .feature-img {
            width: 80%;
            margin: 30px auto;
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
            overflow: hidden;
            transition: transform 0.5s ease;
        }
        .feature-img:hover {
            transform: scale(1.02);
        }
        .form-section {
            background-color: #f1f8ff;
            padding: 25px;
            border-radius: 10px;
            margin: 40px 0;
            border: 1px solid #cce5ff;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #1e3c72;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #007bff;
            outline: none;
            box-shadow: 0 0 5px rgba(0,123,255,0.5);
        }
        button {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        button:hover {
            background: linear-gradient(to right, #2a5298, #1e3c72);
            transform: translateY(-3px);
        }
        footer {
            background-color: #1a1a2e;
            color: #ccc;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: #ffcc00;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }
        friend-link {
            display: block;
            margin-bottom: 10px;
            color: #66b3ff;
            font-size: 1rem;
        }
        friend-link:hover {
            color: #ffcc00;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            .header-content { flex-direction: column; gap: 15px; }
            nav ul { gap: 15px; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: #1e3c72;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            nav ul.active { display: flex; }
            nav a { justify-content: center; }
            .feature-img { width: 95%; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .my-logo { font-size: 2rem; }
            .container { padding: 0 15px; }
        }
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .last-updated {
            font-style: italic;
            color: #666;
            font-size: 0.95rem;
            text-align: right;
            margin-top: 20px;
        }