doc-src/templates/default/fulldoc/html/css/custom.css

.alert {
  border: 1px solid;
  border-radius: 2px;
  display: flex;
  margin: 10px 0px;
  padding: 12px 20px;
}

.alert.alert-info {
  border-color: #0073bb;
  background-color: #f1faff;
}

.alert.alert-warning {
  border-color: #d13212;
  background-color: #fdf3f1;
}

.alert .alert-icon:before {
  font-size: 2em;
  padding-right: 15px;
}

.alert-info .alert-icon:before {
  content: "ⓘ";
  color: #0073bb;
}

.alert-warning .alert-icon:before {
  content: "⚠";
  color: #d13212;
}

.alert .alert-header {
  font-weight: bold;
  padding-bottom: 5px;
}

.alert .alert-dismiss {
  cursor: pointer;
  margin-left: auto;
}

.alert .alert-dismiss:after {
  content: "✕";
  padding-left: 10px;
}