body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    color: #333;
    background: linear-gradient(135deg, #0000FF, #8A2BE2, #FFA500);
    background-size: 300% 300%;
    animation: gradientShift 15s infinite alternate ease-in-out;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

header {
    text-align: center;
    padding: 100px 20px;
    color: white;
    font-size: 2.5em;
    font-weight: bold;
    background: rgba(0, 0, 0, 0.5);
}

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

.card {
    background: linear-gradient(135deg, #6a11cb, #2575fc);
    color: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
}

.card h3 {
    font-size: 1.2em;
    margin-bottom: 10px;
}

.card p {
    font-size: 0.9em;
    line-height: 1.5;
}

article {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

article h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: #333;
}

article h3 {
    font-size: 1.5em;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #555;
}

article pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9em;
    margin: 15px 0;
}

article table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

article th, article td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}

article th {
    background: #f8f8f8;
    color: #333;
}

@media (max-width: 768px) {
    header {
        font-size: 2em;
        padding: 80px 10px;
    }

    article h2 {
        font-size: 1.8em;
    }

    article h3 {
        font-size: 1.3em;
    }

    .card {
        padding: 15px;
    }

    .card h3 {
        font-size: 1em;
    }

    .card p {
        font-size: 0.8em;
    }
}

footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 0.9em;
}