body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: radial-gradient(circle, rgb(30, 39, 64), transparent);
    color: #f8f9fa;
    overflow-x: hidden;
}
header {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #007bff, #28a745);
    overflow: hidden;
}
header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover, 
                url('https://images.gptkong.com/demo/sample2.png') no-repeat bottom right/20%, 
                url('https://images.gptkong.com/demo/sample3.png') no-repeat bottom left/20%;
    opacity: 0.2;
    z-index: -1;
}
header h1 {
    font-size: 3rem;
    font-weight: bold;
    color: #fff;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}
header p {
    font-size: 1.2rem;
    margin-top: 1rem;
    max-width: 600px;
    line-height: 1.6;
}
.container {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
section {
    margin-bottom: 4rem;
    position: relative;
    padding: 2rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
section h2 {
    font-size: 2rem;
    color: #007bff;
    margin-bottom: 1rem;
    position: relative;
}
section h2::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 50px;
    height: 3px;
    background: #28a745;
    border-radius: 5px;
}
section p {
    font-size: 1rem;
    line-height: 1.8;
    color: #e9ecef;
}
pre {
    background: #1c1f2b;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    color: #61dafb;
    font-family: 'Courier New', Courier, monospace;
}
code {
    font-size: 0.9rem;
    color: #ffcb8b;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}
table th, table td {
    padding: 0.8rem;
    border: 1px solid #444;
    text-align: center;
    color: #e9ecef;
}
table th {
    background: #007bff;
}
table td {
    background: #28a745;
}
img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin: 1rem 0;
}
button {
    background: #007bff;
    color: #fff;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}
button:hover {
    transform: scale(1.1);
    background: #28a745;
}
@keyframes aurora-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.loader {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #007bff;
    border-radius: 50%;
    animation: spin 2s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    section {
        padding: 1rem;
    }
}