body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #1E88E5, #4FC3F7);
    color: white;
    line-height: 1.6;
}

header {
    position: relative;
    text-align: center;
    padding: 50px 20px;
    background: radial-gradient(circle, rgba(0, 150, 255, 0.7), transparent);
}

header h1 {
    font-size: 48px;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
}

.module {
    background: rgba(255, 255, 255, 0.1);
    margin: 20px;
    padding: 20px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.module:hover {
    transform: translateY(-5px);
}

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

article {
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 10px;
    max-width: 1200px;
    margin: 0 auto;
}

article h2 {
    color: #FFC107;
    font-size: 36px;
    margin-bottom: 20px;
}

article h3 {
    color: #4FC3F7;
    font-size: 28px;
    margin-top: 30px;
}

code {
    display: block;
    background: #1E88E5;
    color: #fff;
    padding: 10px;
    border-radius: 5px;
    font-family: monospace;
    margin: 10px 0;
    overflow-x: auto;
}

button {
    background-color: #FFC107;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

button:hover {
    background-color: #FF9800;
}

button:active {
    transform: scale(0.95);
}

.parallax {
    background-image: url('https://images.gptkong.com/demo/sample1.png');
    height: 400px;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    margin: 40px 0;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 36px;
    }

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

    article h2 {
        font-size: 28px;
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 1s ease-in-out;
}