:root {
            --primary-color: #FF5733;
            --secondary-color: #33FF57;
            --accent-color: #3357FF;
            --text-color: #333333;
            --bg-color: #F9F9F9;
        }
        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--bg-color);
            margin: 0;
            padding: 0;
        }
        header {
            background-color: var(--primary-color);
            color: white;
            padding: 1rem;
            text-align: center;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        nav {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: bold;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        h1 {
            color: var(--accent-color);
            margin-bottom: 1rem;
            font-size: 2.2rem;
        }
        h2 {
            color: var(--primary-color);
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }
        h3 {
            color: var(--secondary-color);
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            font-size: 1.4rem;
        }
        p {
            margin-bottom: 1rem;
        }
        .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: white;
            padding: 0.8rem 1.5rem;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            margin: 0.5rem 0;
            transition: background-color 0.3s;
        }
        .btn:hover {
            background-color: #2247cc;
        }
        .download-btn {
            background-color: var(--primary-color);
        }
        .download-btn:hover {
            background-color: #e64d2b;
        }
        .login-btn {
            background-color: var(--secondary-color);
        }
        .login-btn:hover {
            background-color: #2bc74e;
        }
        .image-container {
            text-align: center;
            margin: 2rem 0;
        }
        .image-container img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }
        .table-container {
            overflow-x: auto;
            margin: 2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0;
        }
        th, td {
            border: 1px solid #ddd;
            padding: 0.8rem;
            text-align: left;
        }
        th {
            background-color: var(--primary-color);
            color: white;
        }
        tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        .tags {
            margin: 2rem 0;
        }
        .tag {
            display: inline-block;
            background-color: #e0e0e0;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            text-decoration: none;
            color: var(--text-color);
        }
        footer {
            background-color: var(--text-color);
            color: white;
            text-align: center;
            padding: 2rem;
            margin-top: 2rem;
        }
        .footer-links {
            margin: 1rem 0;
        }
        .footer-links a {
            color: var(--secondary-color);
            text-decoration: none;
            margin: 0 0.5rem;
        }
        @media (max-width: 768px) {
            nav {
                flex-direction: column;
                align-items: center;
                display: none;
            }
            nav.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
        }