body {
    margin: 0;
    font-family: 'Helvetica', sans-serif;
    background: linear-gradient(135deg, #0074D9, #FF4136);
    color: white;
    overflow-x: hidden;
}

header {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover, 
                linear-gradient(135deg, #2E7D32, #8BC34A);
    position: relative;
    text-align: center;
    color: white;
}

header h1 {
    font-size: 3em;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    z-index: 2;
}

header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.container {
    max-width: 1200px;
    margin: -100px auto 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    color: white;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.grid-item {
    background: rgba(255, 255, 255, 0.8);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
    color: #333;
}

.grid-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

article {
    font-size: 1rem;
    line-height: 1.6;
    color: white;
    margin-top: 20px;
}

article h2, article h3 {
    color: #FFEB3B;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

code, pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 5px;
    display: block;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    color: #00FF00;
}

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

th, td {
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 10px;
    text-align: center;
}

th {
    background: rgba(0, 0, 0, 0.2);
}

.button {
    background: linear-gradient(135deg, #0074D9, #FF4136);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.button:hover {
    background: linear-gradient(135deg, #FF4136, #0074D9);
}

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

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

    code, pre {
        font-size: 0.9em;
    }
}

footer {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, #FF4136, #0074D9);
    color: white;
    margin-top: 20px;
}