gitea/web_src/css/install.css

.page-content.install .install-config-container {
  max-width: 900px;
  margin: auto;
}

.page-content.install form.ui.form .inline.field > label {
  text-align: right;
  width: 30%;
  padding-right: 10px;
  margin-right: 0;
}

.page-content.install .ui.form .field > .help,
.page-content.install .ui.form .field > .ui.checkbox:first-child,
.page-content.install .ui.form .field > .right-content {
  margin-left: calc(30% + 5px);
  width: auto;
}

.page-content.install form.ui.form input:not([type="checkbox"],[type="radio"]),
.page-content.install form.ui.form .ui.selection.dropdown {
  width: 60%;
}

.page-content.install form.ui.form details.optional.field[open] {
  padding-bottom: 10px;
}
.page-content.install form.ui.form details.optional.field[open]:not(:last-child) {
  border-bottom: 1px dashed var(--color-secondary);
}
.page-content.install form.ui.form details.optional.field[open] summary {
  margin-bottom: 10px;
}

.page-content.install form.ui.form details.optional.field * {
  box-sizing: border-box;
}

.page-content.install form.ui.form .field {
  text-align: left;
}

.page-content.install .ui .reinstall-message {
  width: 70%;
  margin: 20px auto;
  color: var(--color-red);
  text-align: left;
  font-weight: var(--font-weight-semibold);
}

.page-content.install .ui .reinstall-confirm {
  width: 70%;
  text-align: left;
  margin: 10px auto;
}