/**
 * Flexible template admin css.
 */

.layout-flexible-region-top .label {
  display: inline-block;
  margin: 0;
  padding: 4px 12px 4px 0; /* LTR */
  line-height: 1.2;
  text-transform: uppercase;
  font-weight: normal;
  color: #000;
}
[dir="rtl"] .layout-flexible-region-top .label {
  padding: 4px 0 4px 12px;
}

.flexible-row .layout-editor-region-title .label {
  font-size: 16px;
}

.layout--flexible .layout-editor-block {
  box-shadow: none;
}
.layout--flexible .layout-editor-block-title {
  padding: 0.4em 1em;
  margin-bottom: 10px;
}
.layout--flexible .layout-editor-block-title .text {
  font-weight: normal;
}
.layout--flexible .layout-editor-block-content p {
  color: #575357;
}

.layout-flexible-region-top .buttons {
  display: inline-block;
}

.layout-flexible-editor .flexible-row {
  padding: 0;
  border: 1.25px dashed #0074bd;
  margin-bottom: 15px;
  border-radius: 4px;
  box-shadow: 3px 3px 0 0 #c6c6c6;
}
.layout-flexible-editor .flexible-row:hover {
  background-color: #ffffff;
  cursor: move;
}

.layout-flexible-add-row {
  margin: 20px;
}
[dir="rtl"] .layout-flexible-template-configure-form .layout-flexible-add-row {
  margin-right: 20px;
}

.flexible-icon {
  border: 2px solid #999;
  border-radius: 3px;
  padding: 1px;
}
.flexible-icon-region {
  background-color: #ccc;
  color: #fff;
  background-clip: content-box;
  text-align: center;
}

File

core/modules/layout/css/layout.flexible.admin.css