@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&family=Roboto:wght@400;500&display=swap');

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #1F1F1F 0%, #0A0A0A 100%);
    color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat, linear-gradient(135deg, #1F1F1F 0%, #000000 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: repeating-linear-gradient(45deg, rgba(0, 255, 255, 0.1), rgba(0, 255, 255, 0.1) 10px, transparent 10px, transparent 20px);
    animation: moveGradient 10s linear infinite;
    z-index: 1;
}

@keyframes moveGradient {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

header h1 {
    font-size: 3rem;
    font-weight: bold;
    color: #00FFFF;
    text-shadow: 0 0 10px #00FFFF, 0 0 20px #00FFFF;
    z-index: 2;
}

section {
    padding: 4rem 2rem;
    position: relative;
}

.parallax {
    height: 80vh;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    z-index: 1;
}

.parallax:nth-of-type(1) {
    background-image: url('https://images.gptkong.com/demo/sample2.png');
}

.parallax:nth-of-type(2) {
    background-image: url('https://images.gptkong.com/demo/sample3.png');
}

.foreground {
    position: relative;
    z-index: 2;
    background: rgba(0, 0, 0, 0.7);
    padding: 2rem;
    border-radius: 10px;
    margin-top: -100px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

button {
    background-color: #39FF14;
    border: none;
    color: white;
    padding: 1rem 2rem;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px #39FF14;
}

button:hover {
    box-shadow: 0 0 20px #39FF14, 0 0 30px #39FF14, 0 0 40px #39FF14;
}

pre {
    background: #1F1F1F;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    color: #00FFFF;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
}

code {
    color: #FF4500;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

table th, table td {
    border: 1px solid #39FF14;
    padding: 0.8rem;
    text-align: center;
    color: #FFFFFF;
}

table th {
    background-color: #00FFFF;
}

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

    section {
        padding: 2rem;
    }

    pre {
        font-size: 0.8rem;
    }

    table {
        font-size: 0.9rem;
    }
}