body {
    margin: 0;
    font-family: 'Georgia', serif;
    background: radial-gradient(circle, rgba(33, 150, 243, 0.8), rgba(76, 175, 80, 0.8));
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    background: linear-gradient(135deg, #8bc34a, #03a9f4);
    padding: 20px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header h1 {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    font-size: 2.5rem;
    color: white;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    background: repeating-radial-gradient(circle, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.1) 10px, transparent 10px, transparent 20px);
    transform: rotate(45deg);
    animation: aurora-move 15s linear infinite;
}

@keyframes aurora-move {
    from { transform: translateX(-50%) rotate(0deg); }
    to { transform: translateX(-50%) rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid #ddd;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-family: 'Roboto', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #03a9f4;
}

.card-content p {
    font-size: 1rem;
    color: #555;
}

.article-section {
    background: rgba(255, 255, 255, 0.9);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    margin-top: 40px;
}

.article-section h2, .article-section h3 {
    font-family: 'Roboto', sans-serif;
    color: #333;
}

.article-section pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
}

.article-section code {
    font-family: 'Courier New', monospace;
    color: #e91e63;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .container {
        grid-template-columns: 1fr;
    }

    .card img {
        height: 150px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .article-section {
        padding: 20px;
    }
}