send/app/templates/popup/popup.css

.popup {
  display: block;
  width: 100%;
  height: 70px;
  background-color: var(--errorColor);
  color: var(--textColor);
  padding: 0;
  box-sizing: border-box;
  text-align: center;
  border-radius: 4px;
  transition: opacity 0.5s;
  outline: 0;
  opacity: 0;
  visibility: hidden;
}

.popup::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  width: 0;
  height: 0;
  border: 8px solid;
  border-color: var(--errorColor) transparent transparent;
  margin-left: -8px;
  pointer-events: none;
}

.popup__message {
  height: 40px;
  padding: 10px;
  box-sizing: border-box;
  text-align: center;
  color: var(--primaryControlFGColor);
  font-size: 15px;
  font-style: italic;
  white-space: nowrap;
}

.popup__action {
  display: flex;
  flex-direction: row;
  text-transform: uppercase;
}

.popup__action > div {
  flex: auto;
}

.popup__no {
  color: var(--primaryControlFGColor);
  padding: 5px;
  font-weight: bold;
  cursor: pointer;
  white-space: nowrap;
}

.popup__no:hover {
  text-decoration: underline;
}

.popup__yes {
  color: var(--primaryControlFGColor);
  padding: 5px;
  font-weight: normal;
  cursor: pointer;
  white-space: nowrap;
}

.popup__yes:hover {
  text-decoration: underline;
}

.popup--show {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}