body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(to bottom, #000033, #1a004d);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center, 
                url('https://images.gptkong.com/demo/sample2.png') no-repeat right top,
                linear-gradient(to bottom, #000033, #1a004d);
    background-size: auto, auto, cover;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

header h1 {
    font-family: 'Exo 2', sans-serif;
    font-size: 4rem;
    letter-spacing: 4px;
    color: #00ff99;
    text-shadow: 0 0 10px #00ff99;
}

header p {
    font-size: 1.5rem;
    margin-top: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    margin-bottom: 4rem;
}

h2, h3 {
    color: #00ff99;
    margin-bottom: 1rem;
}

p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

pre {
    background: rgba(0, 0, 0, 0.7);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.9rem;
}

code {
    color: #00ff99;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

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

th {
    background: rgba(0, 0, 0, 0.5);
    color: #00ff99;
}

td {
    background: rgba(0, 0, 0, 0.3);
}

.button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(to right, #00ff99, #00ccff);
    color: #000033;
    font-size: 1rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.button:hover::after {
    width: 200px;
    height: 200px;
}

.star-cloud {
    background: url('https://images.gptkong.com/demo/sample3.png') no-repeat center center;
    background-size: cover;
    height: 300px;
    animation: starGlow 10s infinite;
    margin-bottom: 2rem;
}

@keyframes starGlow {
    0% { opacity: 0.5; }
    50% { opacity: 1; }
    100% { opacity: 0.5; }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }

    pre {
        font-size: 0.8rem;
    }

    .container {
        padding: 0 0.5rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    .button {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}

footer {
    text-align: center;
    padding: 2rem 0;
    background: linear-gradient(to bottom, #1a004d, #000033);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}