body {
    font-family: Arial;
}

.nav_button {
    width: 170px;
    padding: 8px 0;
    text-align: center;
    border-radius: 5px;
    border: 2px solid #f0f0f0;
    cursor: pointer;
}

.nav_button:hover {
    border-color: #4496bd;
}