body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    margin: 0;
    text-align: center;
}

header, footer {
    background: #111;
    color: #fff;
    padding: 15px;
}

.tools a {
    display: inline-block;
    margin: 15px;
    padding: 15px 25px;
    background: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
}

.tools a:hover {
    background: #0056b3;
}