body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0000FF, #8A2BE2);
    color: #fff;
    overflow-x: hidden;
    height: 100%;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: rgba(0, 0, 0, 0.3);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5em;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
    color: #FFFFFF;
    margin: 0;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
}

.card {
    background: rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 10px;
}

.article-section {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 10px;
    margin: 20px;
}

.article-section h2, .article-section h3 {
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.article-section pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

.article-section code {
    color: #00FF00;
    font-family: 'Courier New', monospace;
}

.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png'), 
                url('https://images.gptkong.com/demo/sample2.png');
    background-size: cover;
    background-position: center;
    filter: blur(10px);
    opacity: 0.8;
    z-index: -1;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    .card {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5em;
    }
    .container {
        grid-template-columns: 1fr;
    }
}

.footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    color: #FFFFFF;
    font-size: 0.9em;
}