body {
    font-family: 'Courier New', Courier, monospace;
    background-color: #1a1a1a;
    color: #00ff00;
    margin: 0;
    padding: 0;
}

header {
    background: #333;
    color: #00ff00;
    padding: 20px 0;
    text-align: center;
    border-bottom: 2px solid #00ff00;
}

header nav ul {
    list-style: none;
    padding: 0;
}

header nav ul li {
    display: inline;
    margin: 0 15px;
}

header nav ul li a {
    color: #00ff00;
    text-decoration: none;
}

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

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

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

table, th, td {
    border: 1px solid #00ff00;
}

th, td {
    padding: 10px;
    text-align: left;
}

ul {
    list-style: none;
    padding: 0;
}

textarea {
    width: 100%;
    padding: 10px;
    margin: 5px 0;
    background: #333;
    color: #00ff00;
    border: 1px solid #00ff00;
}

button {
    background: #00ff00;
    color: #1a1a1a;
    border: none;
    padding: 10px;
    cursor: pointer;
}

button:hover {
    background: #1a1a1a;
    color: #00ff00;
    border: 1px solid #00ff00;
}