body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(to bottom, #0F4C81, #4B0082);
    color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    background: rgba(15, 76, 129, 0.9);
    padding: 20px 0;
    text-align: center;
    position: relative;
}

header h1 {
    font-size: 2.5rem;
    font-weight: bold;
    color: #FFD700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin: 0;
}

header p {
    font-size: 1rem;
    color: #F5F5F5;
    margin-top: 10px;
}

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

.module {
    background-color: #F5F5F5;
    color: #0F4C81;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.module:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

.module img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 10px;
}

.module h3 {
    font-size: 1.5rem;
    font-weight: bold;
    color: #0F4C81;
    margin-top: 0;
}

.module p {
    font-size: 1rem;
    line-height: 1.6;
    margin: 10px 0;
}

.parallax {
    height: 400px;
    background-image: url('https://images.gptkong.com/demo/sample1.png'), url('https://images.gptkong.com/demo/sample2.png');
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.parallax::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 76, 129, 0.7);
    z-index: 1;
}

.parallax h2 {
    font-size: 2rem;
    font-weight: bold;
    z-index: 2;
}

article {
    background: rgba(255, 255, 255, 0.9);
    color: #0F4C81;
    padding: 20px;
    border-radius: 8px;
    margin: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

article h2, article h3 {
    color: #0F4C81;
    font-weight: bold;
}

article pre {
    background: #0F4C81;
    color: #FFFFFF;
    padding: 10px;
    border-radius: 4px;
    overflow-x: auto;
}

article code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
}

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

    .module {
        padding: 15px;
    }

    .parallax {
        height: 300px;
    }
}

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

    .module h3 {
        font-size: 1.2rem;
    }

    .parallax {
        height: 200px;
    }
}