Overleaf/services/web/frontend/stylesheets/components/popovers.less

//
// Popovers
// --------------------------------------------------

.popover {
  position: absolute;
  top: 0;
  left: 0;
  z-index: @zindex-popover;
  display: none;
  max-width: @popover-max-width;
  padding: 1px;
  text-align: left; // Reset given new insertion method
  background-color: @popover-bg;
  background-clip: padding-box;
  border: 1px solid @popover-fallback-border-color;
  border: 1px solid @popover-border-color;
  border-radius: @border-radius-large;
  .box-shadow(0 5px 10px rgba(0, 0, 0, 0.2));

  // Overrides for proper insertion
  white-space: normal;

  // Offset the popover to account for the popover arrow
  &.top {
    margin-top: -@popover-arrow-width;
  }
  &.right {
    margin-left: @popover-arrow-width;
  }
  &.bottom {
    margin-top: @popover-arrow-width;
  }
  &.left {
    margin-left: -@popover-arrow-width;
  }
}

.popover-title {
  margin: 0; // reset heading margin
  padding: 8px 14px;
  font-size: @font-size-base;
  font-weight: normal;
  line-height: 18px;
  background-color: @popover-title-bg;
  border-bottom: 1px solid darken(@popover-title-bg, 5%);
  border-radius: 5px 5px 0 0;
}

.popover-content {
  padding: 9px 14px;
}

// Arrows
//
// .arrow is outer, .arrow:after is inner

.popover > .arrow {
  &,
  &:after {
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
  }
}
.popover > .arrow {
  border-width: @popover-arrow-outer-width;
}
.popover > .arrow:after {
  border-width: @popover-arrow-width;
  content: '';
}

.popover {
  &.top > .arrow {
    left: 50%;
    margin-left: -@popover-arrow-outer-width;
    border-bottom-width: 0;
    border-top-color: @popover-arrow-outer-fallback-color; // IE8 fallback
    border-top-color: @popover-arrow-outer-color;
    bottom: -@popover-arrow-outer-width;
    &:after {
      content: ' ';
      bottom: 1px;
      margin-left: -@popover-arrow-width;
      border-bottom-width: 0;
      border-top-color: @popover-arrow-color;
    }
  }
  &.right > .arrow {
    top: 50%;
    left: -@popover-arrow-outer-width;
    margin-top: -@popover-arrow-outer-width;
    border-left-width: 0;
    border-right-color: @popover-arrow-outer-fallback-color; // IE8 fallback
    border-right-color: @popover-arrow-outer-color;
    &:after {
      content: ' ';
      left: 1px;
      bottom: -@popover-arrow-width;
      border-left-width: 0;
      border-right-color: @popover-arrow-color;
    }
  }
  &.bottom > .arrow {
    left: 50%;
    margin-left: -@popover-arrow-outer-width;
    border-top-width: 0;
    border-bottom-color: @popover-arrow-outer-fallback-color; // IE8 fallback
    border-bottom-color: @popover-arrow-outer-color;
    top: -@popover-arrow-outer-width;
    &:after {
      content: ' ';
      top: 1px;
      margin-left: -@popover-arrow-width;
      border-top-width: 0;
      border-bottom-color: @popover-arrow-color;
    }
  }

  &.left > .arrow {
    top: 50%;
    right: -@popover-arrow-outer-width;
    margin-top: -@popover-arrow-outer-width;
    border-right-width: 0;
    border-left-color: @popover-arrow-outer-fallback-color; // IE8 fallback
    border-left-color: @popover-arrow-outer-color;
    &:after {
      content: ' ';
      right: 1px;
      border-right-width: 0;
      border-left-color: @popover-arrow-color;
      bottom: -@popover-arrow-width;
    }
  }
}

.popover.dark-themed {
  .popover-title {
    color: @popover-dark-color;
    background-color: @popover-dark-bg;
    border-bottom: 0;
    font-family: Lato, sans-serif;
    font-weight: bold;
  }

  .popover-content {
    color: @popover-dark-color;
    background-color: @popover-dark-bg;
  }

  a {
    color: #97b6e5;
  }

  padding: 0;
  border: 1px solid @popover-dark-border-color;
  max-width: @popover-dark-max-width;
}

.popover.dark-themed {
  &.top > .arrow {
    border-top-color: @popover-dark-arrow-outer-color;
    &:after {
      border-top-color: @popover-dark-arrow-color;
    }
  }
  &.right > .arrow {
    border-right-color: @popover-dark-arrow-outer-color;
    &:after {
      border-right-color: @popover-dark-arrow-color;
    }
  }
  &.bottom > .arrow {
    border-bottom-color: @popover-dark-arrow-outer-color;
    &:after {
      border-bottom-color: @popover-dark-arrow-color;
    }
  }

  &.left > .arrow {
    border-left-color: @popover-dark-arrow-outer-color;
    &:after {
      border-left-color: @popover-dark-arrow-color;
    }
  }
}