body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0A2463, #000000);
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle, rgba(10, 36, 99, 0.8), transparent), url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    color: #FFD700;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}

header h1 {
    font-size: 3rem;
    font-weight: bold;
    letter-spacing: 2px;
    animation: fadeIn 2s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.container {
    display: flex;
    flex-wrap: wrap;
    padding: 20px;
    justify-content: space-between;
    margin-top: -100px;
}

.left-panel, .right-panel {
    flex: 1;
    min-width: 300px;
    margin: 10px;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease-in-out;
}

.left-panel {
    background: linear-gradient(135deg, #0A2463, #1E3C72);
    color: #fff;
}

.right-panel {
    background: linear-gradient(135deg, #FFFFFF, #F0F8FF);
    color: #000;
}

.left-panel:hover, .right-panel:hover {
    transform: scale(1.05);
}

.gradient-border {
    position: absolute;
    top: 20%;
    left: 50%;
    width: 5px;
    height: 60%;
    background: linear-gradient(to bottom, #0A2463, #FFD700);
    transform: translateX(-50%);
    z-index: 1;
}

article {
    max-width: 1200px;
    margin: 50px auto;
    padding: 30px;
    background: rgba(255, 255, 255, 0.9);
    color: #333;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

article h2 {
    font-size: 2rem;
    font-weight: bold;
    color: #0A2463;
    margin-bottom: 20px;
}

article pre {
    background: #f4f4f4;
    color: #333;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.4;
}

article ul, article ol {
    padding-left: 20px;
}

article img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 20px 0;
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .left-panel, .right-panel {
        flex: none;
        margin: 10px 0;
    }

    .gradient-border {
        display: none;
    }
}

footer {
    text-align: center;
    padding: 20px;
    background: #0A2463;
    color: #FFD700;
    font-size: 0.9rem;
}