body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: radial-gradient(circle, rgb(30, 58, 138), rgb(0, 0, 0));
    color: #F5F5F5;
    overflow-x: hidden;
    line-height: 1.6;
}
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 24px;
    color: #00B4D8;
    margin: 0;
}
header nav a {
    text-decoration: none;
    color: #F5F5F5;
    margin-left: 20px;
    font-size: 16px;
    transition: color 0.3s ease, transform 0.3s ease;
}
header nav a:hover {
    color: #00B4D8;
    transform: scale(1.1);
}
main {
    padding-top: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}
.glass-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    padding: 30px;
    margin: 20px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
    max-width: 90%;
    transition: transform 0.3s ease;
}
.glass-card:hover {
    transform: translateY(-10px);
}
.star-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png'), url('https://images.gptkong.com/demo/sample2.png'), radial-gradient(circle, rgb(30, 58, 138), rgb(0, 0, 0));
    background-size: cover;
    animation: star-move 30s linear infinite;
    z-index: -1;
}
@keyframes star-move {
    from { background-position: 0 0, 0 0; }
    to { background-position: 1000px 0, -1000px 0; }
}
h2, h3, h4 {
    font-family: 'Poppins', sans-serif;
    color: #00B4D8;
    text-align: center;
    margin: 20px 0;
}
article {
    padding: 20px;
    max-width: 1200px;
    margin: auto;
}
pre {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 14px;
    color: #FFFFFF;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
table th, table td {
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px;
    text-align: left;
}
@media (max-width: 768px) {
    header {
        flex-direction: column;
        padding: 10px;
    }
    .glass-card {
        padding: 20px;
    }
    pre {
        font-size: 12px;
    }
}