body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #000046, #1cb5e0);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    text-align: center;
    padding: 2rem 1rem;
    background: rgba(0, 0, 70, 0.8);
    position: relative;
}

header h1 {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: 2px;
    transition: color 0.5s ease;
}

header h1:hover {
    color: #00ff8f;
}

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

.card {
    background: rgba(0, 0, 70, 0.8);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 255, 143, 0.5);
}

.card img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #00ff8f;
}

p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

code {
    display: block;
    background: #000046;
    color: #00ff8f;
    padding: 1rem;
    border-radius: 5px;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
}

pre {
    margin: 1rem 0;
}

.button {
    background-color: #00ff8f;
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.button:hover {
    background-color: #ffffff;
    color: #00ff8f;
    border: 2px solid #00ff8f;
}

.parallax {
    background-image: url('https://images.gptkong.com/demo/sample1.png');
    height: 400px;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    margin: 2rem 0;
}

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

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

    .parallax {
        height: 300px;
    }
}

.icon-node {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #00ff8f;
    box-shadow: 0 0 10px rgba(0, 255, 143, 0.5);
    position: relative;
    margin: 1rem auto;
}

.icon-node::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    height: 70%;
    border-radius: 50%;
    background-color: #ffffff;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: rgba(0, 0, 70, 0.8);
    color: #ffffff;
}

table th, table td {
    padding: 0.8rem;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

table th {
    background: #00ff8f;
    color: #000046;
}

footer {
    text-align: center;
    padding: 1rem;
    background: rgba(0, 0, 70, 0.8);
    margin-top: 2rem;
}