body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: radial-gradient(circle, rgb(10, 25, 47), transparent), linear-gradient(to bottom, #0A192F, #1E3A5F);
    color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover, linear-gradient(to bottom, #0A192F, #1E3A5F);
    animation: fadeIn 2s ease-in-out;
}

header h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    font-size: 3rem;
    color: #FFD700;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
}

header p {
    font-size: 1.2rem;
    color: #FFFFFF;
    margin-top: 1em;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2em;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2em;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 1.5em;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.3);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 1em;
}

.card h3 {
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    font-size: 1.5rem;
    color: #FFD700;
}

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

pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 1em;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    color: #FFD700;
}

code {
    color: #FFC107;
}

button {
    background: linear-gradient(45deg, #FFD700, #FFC107);
    border: none;
    padding: 1em 2em;
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.3s ease, background 0.3s ease;
}

button:hover {
    transform: scale(1.1);
    background: linear-gradient(45deg, #FFC107, #FFD700);
}

footer {
    background: #0A192F;
    color: #FFFFFF;
    text-align: center;
    padding: 2em;
    margin-top: 2em;
}

footer p {
    font-size: 0.9rem;
}

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

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

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

    pre {
        font-size: 0.8rem;
    }
}