:root {
    --first-theme-color: #198ec3;
    --second-theme-color: #198ec3;
    --third-theme-color: #0055b1;
    --fourth-theme-color: #0055c8;
    --light-gray-color: #d3d3d3;
    --dark-gray-color: #a9a8a9;
    --danger-color: #dc3545;
}