.woocommerce table.shop_attributes {
width:100%;
border-collapse:collapse;
}

.woocommerce table.shop_attributes th {
background:#f3f3f3;
padding:14px;
border:1px solid #ddd;
text-align:left;
width:30%;
}

.woocommerce table.shop_attributes td {
padding:14px;
border:1px solid #ddd;
}

.woocommerce table.shop_attributes tr:nth-child(even) td {
background:#fafafa;
}
.spec-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: auto;      /* let columns size to content */
}

.spec-table th,
.spec-table td {
    padding: 12px 14px;
    border: 1px solid #ddd;
    white-space: nowrap;     /* prevents huge empty columns */
}

.spec-table th.spec-label {
    width: 260px;            /* keep specification column fixed */
}

.spec-table td:empty {
    display: none;           /* hide cells that have no values */
}

/* keep table inside the page area */
.woocommerce-Tabs-panel {
    overflow-x: auto;
}