atomic-search-box::part(wrapper) { border-color: rgb(75 85 99); background-color: rgb(249 250 251); } atomic-search-box::part(submit-button) { margin: auto; margin-right: 9px; background-color: #e21227; width: 2rem; height: 2rem; border-radius: 0.375rem; text-align: center; line-height: 1em; }