body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    color: #ffffff;
}
header {
    background: rgba(0, 123, 255, 0.8);
    padding: 20px;
    text-align: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}
nav a {
    color: #ffffff;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}
.main {
    padding: 100px 20px 20px 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
.section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    margin: 20px;
    padding: 20px;
    max-width: 600px;
    flex: 1 1 300px;
}
.section h2, .section h3, .section h4 {
    color: #00ffcc;
}
.section pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}
.footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 123, 255, 0.8);
    position: fixed;
    width: 100%;
    bottom: 0;
}
@media (max-width: 768px) {
    nav a {
        display: block;
        margin: 10px 0;
    }
}