body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(to bottom, #000066, #000000);
    color: #ffffff;
    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 right, #000066, #000000);
    color: #FFD700;
    text-shadow: 0px 4px 8px 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); }
}

section {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

section:nth-child(even) {
    background: linear-gradient(to right, #000000, #000066);
}

section h2 {
    color: #FFA500;
    font-size: 2rem;
    margin-bottom: 20px;
    text-align: center;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.grid-item {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.grid-item:hover {
    transform: scale(1.05);
    box-shadow: 0px 8px 16px rgba(255, 165, 0, 0.5);
}

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

.button {
    display: inline-block;
    background-color: #FFA500;
    color: #000;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #FF8C00;
}

pre {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Roboto Mono', monospace;
    color: #FFD700;
    margin: 20px 0;
}

code {
    display: block;
    white-space: pre-wrap;
    word-break: break-word;
}

footer {
    background: linear-gradient(to bottom, #000000, #000066);
    color: #fff;
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
}

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

    section h2 {
        font-size: 1.5rem;
    }

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

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

    section h2 {
        font-size: 1.2rem;
    }

    pre {
        font-size: 0.8rem;
    }
}