* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: #2a5aa7; transition: color 0.3s ease; }
        a:hover { color: #e63946; }
        ul, ol { padding-left: 1.5em; margin: 1em 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        h1 { font-size: 2.8rem; margin: 1em 0 0.5em; color: #1d3557; }
        h2 { font-size: 2.2rem; margin: 1.2em 0 0.6em; color: #457b9d; border-bottom: 3px solid #a8dadc; padding-bottom: 0.3em; }
        h3 { font-size: 1.8rem; margin: 1em 0 0.5em; color: #1d3557; }
        h4 { font-size: 1.4rem; margin: 0.8em 0 0.4em; color: #457b9d; }
        p { margin: 1em 0; }
        .lead { font-size: 1.3rem; font-weight: 300; color: #555; }
        .highlight { background-color: #fffacd; padding: 2px 5px; border-radius: 3px; }
        strong { color: #1d3557; }
        header { background: linear-gradient(135deg, #1d3557 0%, #457b9d 100%); color: white; padding: 1rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
        .header-container { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 2.2rem; font-weight: 800; color: white; }
        .logo a { color: inherit; }
        .logo span { color: #a8dadc; }
        nav ul { display: flex; list-style: none; }
        nav li { margin-left: 2rem; }
        nav a { color: white; font-weight: 500; padding: 0.5rem 0; position: relative; }
        nav a:after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 3px; background-color: #a8dadc; transition: width 0.3s ease; }
        nav a:hover:after { width: 100%; }
        .hamburger { display: none; font-size: 1.8rem; cursor: pointer; }
        .breadcrumb { padding: 1rem 0; background-color: #e9ecef; font-size: 0.9rem; }
        .breadcrumb a { color: #6c757d; }
        .breadcrumb a:hover { color: #1d3557; }
        .breadcrumb span { color: #999; }
        .search-box { background: #fff; border-radius: 50px; padding: 0.5rem 1.5rem; margin: 2rem auto; max-width: 600px; display: flex; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .search-box input { flex: 1; border: none; outline: none; font-size: 1rem; }
        .search-box button { background: #1d3557; color: white; border: none; border-radius: 50px; padding: 0.7rem 1.5rem; cursor: pointer; transition: background 0.3s; }
        .search-box button:hover { background: #e63946; }
        main { display: grid; grid-template-columns: 1fr 300px; gap: 2.5rem; padding: 2rem 0; }
        .content { background: white; padding: 2.5rem; border-radius: 15px; box-shadow: 0 5px 20px rgba(0,0,0,0.05); }
        aside { background: white; padding: 1.5rem; border-radius: 15px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); align-self: start; position: sticky; top: 120px; }
        .code-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.5rem; margin: 2rem 0; }
        .code-card { background: linear-gradient(135deg, #f8f9fa, #e9ecef); border-left: 6px solid #2a5aa7; padding: 1.5rem; border-radius: 8px; transition: transform 0.3s, box-shadow 0.3s; }
        .code-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
        .code-reward { color: #e63946; font-weight: bold; font-size: 1.2rem; }
        .code-expiry { font-size: 0.9rem; color: #6c757d; margin-top: 0.5rem; }
        .rating, .comments { margin: 3rem 0; padding-top: 2rem; border-top: 2px solid #eee; }
        .stars { display: flex; gap: 0.5rem; margin: 1rem 0; }
        .stars i { color: #ffc107; cursor: pointer; font-size: 1.8rem; transition: color 0.2s; }
        .stars i:hover { color: #ff9800; }
        .comment-form textarea, .comment-form input { width: 100%; padding: 1rem; margin: 0.5rem 0; border: 1px solid #ddd; border-radius: 8px; font-family: inherit; }
        .comment-form button { background: #1d3557; color: white; border: none; padding: 0.8rem 2rem; border-radius: 8px; cursor: pointer; }
        .comment-form button:hover { background: #e63946; }
        .comment-list .comment { padding: 1rem; border-bottom: 1px solid #eee; }
        footer { background: #1d3557; color: white; padding: 3rem 0 1.5rem; margin-top: 3rem; }
        .footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-links h4 { color: #a8dadc; }
        .footer-links ul { list-style: none; padding: 0; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #ccc; }
        .footer-links a:hover { color: #fff; }
        friend-link { display: block; margin: 0.5rem 0; }
        .copyright { text-align: center; padding-top: 2rem; margin-top: 2rem; border-top: 1px solid #457b9d; color: #a8dadc; font-size: 0.9rem; }
        @media (max-width: 992px) {
            main { grid-template-columns: 1fr; }
            aside { position: static; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .header-container { flex-wrap: wrap; }
            .hamburger { display: block; }
            nav ul { 
                display: none; 
                flex-direction: column; 
                width: 100%; 
                background: #1d3557; 
                position: absolute; 
                top: 100%; 
                left: 0; 
                padding: 1rem; 
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav.active ul { display: flex; }
            nav li { margin: 0.5rem 0; }
            .code-grid { grid-template-columns: 1fr; }
        }