.wrapper {
    width: auto;
    max-width: 900px;
    margin: 0 auto;
}
h2 {
    margin-bottom: 0;
}
table {
    width: 100%;
    box-sizing: border-box;
    border-collapse: collapse;
    border-spacing: 0;
    margin-bottom: 24px;
}
table td {
    padding: 6px 12px;
    border: 1px solid #aaa;
    box-sizing: border-box;
}
table td:first-child {
    width: 20%;
    font-weight: bold;
    background: #eee;
}

@media screen and (max-width: 640px) {
    table td {
        display: block;
    }
    table td:first-child {
        width: 100%;
    }
}