#example {
    width: 100%;
    max-width: 600px;
    margin: 20px auto;
    padding-top: 2em;
}

#example .buttons {
    position: fixed;
    top: 0;
    left: 0;
    right: 100%;
    width: 100%;
    min-height: 1.5em;
    text-align: center;
    background-color: #555;
    padding: 5px;
    z-index: 100;
}

#example table {
    width: 100%;
    border-collapse: collapse;
    border-top: 1px solid black;
}

#example table tr {
    border: none;
    border-bottom: 1px solid black;
    border-right: 1px solid black;
}

#example table thead tr {
    background: #f5f5f5;
    font-weight: bold;
}

#example table td {
    border: 1px solid black;
    border-top: none;
    border-bottom: none;
    border-right: none;
    padding: .5em;
    position: relative;
}

/* for nested tables */
#example table td > table {
    width: 100%;
}

td > p:first-child {
    margin-top: 0;
}

td > p:last-child {
    margin-bottom: 0;
}