body {
    font-family: 'Courier New', monospace;
    background-color: #000;
    color: #0f0;
    margin: 0;
}

nav {
    background-color: #333;
    padding: 10px;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
}

nav ul li {
    margin-right: 10px;
    margin-bottom: 10px;
    flex: 1 1 calc(20% - 10px);
}

nav ul li a {
    color: #0f0;
    text-decoration: none;
    display: block;
    padding: 5px;
    text-align: center;
}

nav ul li a:hover {
    text-decoration: underline;
}

form {
    display: inline-block;
    margin: 20px;
    width: 100%;
}

label, input {
    display: block;
    margin: 5px 0;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin: 20px 0;
}

th, td {
    border: 1px solid #0f0;
    padding: 5px;
    text-align: left;
}

th {
    background-color: #333;
}

/* Responsive styling */
@media (max-width: 768px) {
    nav ul {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    nav ul li {
        margin-right: 5px;
        margin-bottom: 5px;
        flex: 1 1 calc(50% - 5px);
    }
    
    form {
        margin: 20px 10px;
    }
}