goblindegook/littlefoot

@custom-media --breakpoint (width < 768px);

.littlefoot {
  --button-background-color: #949494;
  --button-text-color: #fff;
  --button-active-background-color: #3f3f3f;
  --button-active-text-color: #fff;
  --button-border-radius: 0.5rem;
  --button-height: 1rem;
  --button-margin: 0 0.1rem;
  --button-padding: 0 0.6rem;
  --button-transition: background-color 0.25s ease, color 0.25s ease;
  --popover-background-color: #f5f5f5;
  --popover-text-color: #111;
  --popover-border: 1px solid #949494;
  --popover-border-radius: 0.5rem;
  --popover-max-height: 15em;
  --popover-max-width: 90%;
  --popover-horizontal-padding: 1.4rem;
  --popover-vertical-padding: 0.6rem;
  --popover-shadow: 0 0 8px #0000004d;
  --popover-transform-origin: 50% 0;
  --popover-transform: scale(0.1) translateZ(0);
  --popover-active-transform: scale(1) translateZ(0);
  --popover-transition: opacity 0.25s ease, transform 0.25s ease;
  --popover-width: 22em;
  --popover-scroll-indicator-color: #3f3f3f;
  --popover-tooltip-size: 0.5rem;

  position: relative;
}

.littlefoot__button {
  background-color: var(--button-background-color);
  border-radius: var(--button-border-radius);
  border: var(--button-border, 0);
  color: var(--button-text-color);
  cursor: pointer;
  display: inline-block;
  font-size: var(--button-font-size, 0.75rem);
  font-weight: var(--button-font-weight, initial);
  height: var(--button-height);
  margin: var(--button-margin);
  padding: var(--button-padding);
  text-decoration: none;
  transition: var(--button-transition);
  vertical-align: middle;

  &:hover,
  &:focus,
  &:active,
  &.is-active {
    background-color: var(--button-active-background-color);
    color: var(--button-active-text-color);
  }

  & svg {
    float: left;
    height: 0.3rem;
  }
}

.littlefoot__popover {
  border: var(--popover-border);
  border-radius: var(--popover-border-radius);
  box-shadow: var(--popover-shadow);
  margin: calc(var(--popover-tooltip-size) + var(--button-height)) 0;
  max-width: var(--popover-max-width);
  position: absolute;
  top: 0;
  transform-origin: var(--popover-transform-origin);
  transform: var(--popover-transform);
  transition: var(--popover-transition);
  width: var(--popover-width);
  z-index: 1;

  &.is-above {
    bottom: 0;
    top: auto;
  }

  &.is-active {
    transform: var(--popover-active-transform);
  }
}

.littlefoot__wrapper {
  border-radius: var(--popover-border-radius);
  position: relative;
  z-index: 1;
}

.littlefoot__content {
  -webkit-overflow-scrolling: touch;
  background-color: var(--popover-background-color);
  border-radius: var(--popover-border-radius);
  box-sizing: border-box;
  color: var(--popover-text-color);
  font-family: var(--popover-font-family, initial);
  font-size: var(--popover-font-size, initial);
  font-style: var(--popover-font-style, initial);
  font-weight: var(--popover-font-weight, initial);
  line-height: var(--popover-line-height, normal);
  max-height: var(--popover-max-height);
  overflow: auto;
  padding: var(--popover-vertical-padding) var(--popover-horizontal-padding);
  width: 100%;

  & img {
    max-width: 100%;
  }

  &:focus {
    outline: none;
  }
}

.is-scrollable {
  --arrow-x: calc(-1 * var(--popover-horizontal-padding));
  --arrow-y: calc(var(--popover-vertical-padding) / 2);

  & .littlefoot__content::after {
    bottom: 0;
    color: var(--popover-scroll-indicator-color);
    content: '\21E3';
    display: block;
    left: 0;
    opacity: 1;
    position: sticky;
    text-align: center;
    transform: translateX(var(--arrow-x)) translateY(var(--arrow-y));
    transition: var(--popover-transition);
    width: var(--popover-horizontal-padding);
  }

  &.is-fully-scrolled .littlefoot__content::after {
    opacity: 0;
  }
}

.littlefoot__tooltip {
  --tooltip-margin: calc(-1 * var(--popover-tooltip-size));

  background-color: var(--popover-background-color);
  border: var(--popover-border);
  box-shadow: var(--popover-shadow);
  height: calc(2 * var(--popover-tooltip-size));
  margin-left: var(--tooltip-margin);
  position: absolute;
  transform: rotate(45deg);
  width: calc(2 * var(--popover-tooltip-size));
}

.is-below .littlefoot__tooltip {
  top: var(--tooltip-margin);
}

.is-above .littlefoot__tooltip {
  bottom: var(--tooltip-margin);
}

@media (--breakpoint) {
  .littlefoot__popover {
    border-radius: 0;
    border-width: 1px 0 0;
    inset: auto 0 0 !important;
    margin: 0;
    max-width: 100% !important;
    position: fixed;
    transform: translateY(100%);
    width: 100%;

    &.is-active {
      transform: translateY(0);
    }
  }

  .littlefoot__wrapper {
    border-radius: 0;
    max-width: 100% !important;
    transform: none;
  }

  .littlefoot__tooltip {
    display: none;
  }
}

@media not print {
  .littlefoot--print {
    display: none;
  }
}

@media print {
  .littlefoot__popover,
  .littlefoot__button {
    display: none;
  }
}