body {
    font-family: Tahoma, helvetica, sans-serif;
}

a {
    text-decoration: none;
}

ul li {
    margin-bottom: 1em;

}

table {
    border-collapse: collapse;
    border: 1px solid #ccc;
}




table td {
    padding: 0.5em;
    border: 1px solid #ccc;
}

header {
    display: flex;
    background-color: #f4f3f8;
}

nav {
    float:left;
    width: 200px;
    background-color: #f4f3f8;
    padding: 10px;
}

footer {
        margin: 10px auto;
        text-align: center;
        padding-top: 5px;
        font-size: 0.8em;
        border-top: 1px solid #f4f3f8;
}