body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f8f9fa;
            text-align: center;
        }
        .header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #0071dc;
            padding: 10px 20px;
        }
        .logo {
            width: 250px;
            height: auto;
        }
        .leaderboard-banner {
            color: white;
            font-size: 24px;
            font-weight: bold;
            text-align: center;
            width: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px 0;
        }
        .nav-container {
            background-color: #343a40;
            padding: 10px 0;
        }
        .nav-menu {
            display: flex;
            justify-content: center;
            gap: 15px;
        }
        .nav-menu a {
            color: white;
            text-decoration: none;
            font-size: 16px;
            padding: 8px 15px;
        }
        .nav-menu a:hover {
            background: #0071dc;
            border-radius: 5px;
        }
        .auth-buttons {
            display: flex;
            justify-content: center;
            margin-top: 10px;
        }
        .auth-buttons a {
            background: #ff9500;
            color: white;
            text-decoration: none;
            padding: 8px 15px;
            border-radius: 5px;
            margin: 0 5px;
        }
        .auth-buttons a:hover {
            background: #cc7a00;
        }
        .store-description {
            padding: 20px;
            max-width: 800px;
            margin: auto;
            text-align: center;
        }
        .category-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            padding: 20px;
            max-width: 1200px;
            margin: auto;
        }
        .category {
            background: white;
            padding: 15px;
            border-radius: 10px;
            box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
            text-align: center;
        }
        .category img {
            width: 100%;
            max-height: 200px;
            object-fit: cover;
            border-radius: 10px;
            cursor: pointer;
        }
        .right-banner {
            position: fixed;
            top: 100px;
            right: 10px;
            width: 160px;
            height: 600px;
            background: #ddd;
            text-align: center;
            padding: 10px;
            font-size: 14px;
        }
         @media (max-width: 768px) {
            .right-banner {
                display: none;
            }
        }
        .donation-message {
            padding: 20px;
            max-width: 800px;
            margin: auto;
            text-align: center;
        }
        footer {
            background-color: #343a40;
            color: white;
            text-align: center;
            padding: 10px;
            margin-top: 20px;
        }