digitransit-ui/app/component/popover.scss

.mobile {
  .popover {
    &::before {
      left: 67%;
    }
  }
}

.popover {
  display: flex;
  position: absolute;
  top: 160%;
  left: -150px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #ddd;
  box-shadow: 0 4px 4px 0 var(--color-shadow-weak, rgba(0, 52, 86, 0.25));
  padding: var(--space-s, 16px) !important;
  gap: 10px;
  align-items: flex-start;
  min-width: 220px;
  z-index: 2000;
  animation: fadeInSlidePopover 1s forwards;

  // Popover arrow
  &::before {
    content: '';
    width: 24px;
    height: 24px;
    position: absolute;
    left: 63%;
    top: -13px;
    transform: translateX(-50%) rotate(45deg);
    z-index: 2500;
    border: 1px solid #ddd;
    border-bottom: none;
    border-right: none;
    background: #fff;
    pointer-events: none;
  }

  .icon {
    &.checkmark {
      color: $attention-color;
      width: 16px;
      height: 16px;
      flex-shrink: 0;
    }
  }

  .popover-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
    align-self: stretch;

    .popover-message-content {
      display: inline-flex;
      align-items: center;
      align-self: stretch;

      span {
        display: inline-flex;
        font-size: 14px;
        font-style: normal;
        font-weight: 325;
        line-height: 18px;
        letter-spacing: -0.5px;
        color: #000;
        font-family: $font-family;
        width: max-content;
      }

      .popover-close-button {
        width: 24px;
        height: 24px;
        justify-content: center;
        align-items: center;
        gap: 10px;
        border-radius: 999px;
        background: #f2f5f7;
        margin-left: 20px;

        .icon {
          width: 16px;
          height: 16px;
          color: $primary-color;
        }
      }
    }

    .popover-acknowledge-button {
      display: flex;
      height: 28px;
      min-width: 60px;
      padding: 0 var(--space-m, 24px);
      justify-content: center;
      align-items: center;
      border-radius: 999px;
      border: 1px solid #888;
      background: #fff;
    }
  }

  .icon-container {
    align-items: center;
    display: flex;
    height: 24px;

    .icon {
      &.checkmark {
        color: $attention-color;
        width: 16px;
        height: 16px;
        flex-shrink: 0;
      }
    }
  }

  &.fade-away {
    animation: fadeAwayPopover 1s forwards;
  }
}

@keyframes fadeInSlidePopover {
  from {
    opacity: 0;
    transform: translateY(-20%);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeAwayPopover {
  from {
    opacity: 1;
    transform: translateY(0);
  }

  to {
    opacity: 0;
    transform: translateY(-20%);
  }
}