/* FloatButton pure CSS styling following pattern/Button.css architecture
   - Local CSS variables (--r-float-button-*) declared on component root
   - Modifier classes rebind local variables
   - Component styles strictly consume local variables
   - An icon button: surface + 1.5px ink edge, control radius on every shape,
     no shadow, press overlay, focus ring.
*/

/* ─────────────────────────────────────────────────────────────────────────
   1. Local Variable Definitions & Modifier Overrides
   ───────────────────────────────────────────────────────────────────────── */

.r-float-button {
  --r-float-button-size: 32px;
  --r-float-button-width: var(--r-float-button-size);
  --r-float-button-padding-x: 0px;
  --r-float-button-border-radius: 8px;
  --r-float-button-border-width: 1.5px;
  --r-float-button-border-style: solid;
  --r-float-button-border-color: var(--line-strong);
  --r-float-button-bg: var(--layer-card);
  --r-float-button-bg-hover: var(--layer-card);
  --r-float-button-press: var(--fill-pressed);
  --r-float-button-text-color: var(--foreground);
  --r-float-button-text-hover-color: var(--foreground);
  --r-float-button-text-disabled-color: var(--foreground-disabled);
  --r-float-button-box-shadow: none;
  --r-float-button-shadow-hover: none;
  --r-float-button-shadow-active: none;
  --r-float-button-transform-hover: none;
  --r-float-button-transform-active: none;
  --r-float-button-outline: 2px solid var(--line-strong);
  --r-float-button-outline-offset: 2px;
  --r-float-button-font-size: 12px;
  --r-float-button-font-weight: 700;
  --r-float-button-desc-font-size: 10px;
  --r-float-button-icon-size: 16px;
  --r-float-button-opacity-disabled: 1;

  /* Sizes: xs (24px), sm (28px), md (32px), lg (36px) */
  &.r-float-button--xs {
    --r-float-button-size: 24px;
    --r-float-button-icon-size: 12px;
    --r-float-button-font-size: 11px;
    --r-float-button-desc-font-size: 8px;
    --r-float-button-padding-x: 8px;
  }
  &.r-float-button--sm {
    --r-float-button-size: 28px;
    --r-float-button-icon-size: 14px;
    --r-float-button-font-size: 12px;
    --r-float-button-desc-font-size: 9px;
    --r-float-button-padding-x: 10px;
  }
  &.r-float-button--md {
    --r-float-button-size: 32px;
    --r-float-button-icon-size: 16px;
    --r-float-button-font-size: 12px;
    --r-float-button-desc-font-size: 10px;
    --r-float-button-padding-x: 12px;
  }
  &.r-float-button--lg {
    --r-float-button-size: 36px;
    --r-float-button-icon-size: 18px;
    --r-float-button-font-size: 14px;
    --r-float-button-desc-font-size: 11px;
    --r-float-button-padding-x: 14px;
  }

  /* Extended with text (adaptive width & horizontal padding) */
  &.r-float-button--with-text {
    --r-float-button-width: auto;
  }

  /* Shapes: every shape takes the control radius; a pill sizes to its text. */
  &.r-float-button--pill {
    --r-float-button-width: auto;
    padding-left: var(--r-float-button-padding-x);
    padding-right: var(--r-float-button-padding-x);
  }

  /* Variants: default and outline are the base surface. Filled variants are
     stickers: ink edge and ink text on the fill, pressed with the sticker
     overlay. */
  &.r-float-button--primary,
  &.r-float-button--accent {
    --r-float-button-border-color: var(--sticker-ink);
    --r-float-button-bg: var(--accent-400);
    --r-float-button-bg-hover: var(--accent-400);
    --r-float-button-press: var(--sticker-pressed);
    --r-float-button-text-color: var(--sticker-ink);
    --r-float-button-text-hover-color: var(--sticker-ink);
  }
  &.r-float-button--warning {
    --r-float-button-border-color: var(--sticker-ink);
    --r-float-button-bg: var(--warning);
    --r-float-button-bg-hover: var(--warning);
    --r-float-button-press: var(--sticker-pressed);
    --r-float-button-text-color: var(--sticker-ink);
    --r-float-button-text-hover-color: var(--sticker-ink);
  }
  &.r-float-button--danger {
    --r-float-button-border-color: var(--sticker-ink);
    --r-float-button-bg: var(--danger);
    --r-float-button-bg-hover: var(--danger);
    --r-float-button-press: var(--sticker-pressed);
    --r-float-button-text-color: var(--sticker-ink);
    --r-float-button-text-hover-color: var(--sticker-ink);
  }
  &.r-float-button--ghost {
    --r-float-button-border-color: transparent;
    --r-float-button-bg: transparent;
    --r-float-button-bg-hover: var(--fill-pressed);
    --r-float-button-press: transparent;
  }
}

/* ─────────────────────────────────────────────────────────────────────────
   2. Base Element Rules Consuming Local Variables
   ───────────────────────────────────────────────────────────────────────── */

.r-float-button {
  position: relative;
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  user-select: none;
  cursor: pointer;
  box-sizing: border-box;
  padding: 0;
  width: var(--r-float-button-width, var(--r-float-button-size));
  min-width: var(--r-float-button-size);
  height: var(--r-float-button-size);
  border-radius: var(--r-float-button-border-radius);
  border-width: var(--r-float-button-border-width);
  border-style: var(--r-float-button-border-style);
  border-color: var(--r-float-button-border-color);
  background-color: var(--r-float-button-bg);
  color: var(--r-float-button-text-color);
  box-shadow: var(--r-float-button-box-shadow);
  font-size: var(--r-float-button-font-size);
  font-weight: var(--r-float-button-font-weight);
  outline: none;
  transition:
    transform 150ms cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow 150ms cubic-bezier(0.4, 0, 0.2, 1),
    background-color 150ms cubic-bezier(0.4, 0, 0.2, 1),
    border-color 150ms cubic-bezier(0.4, 0, 0.2, 1),
    color 150ms cubic-bezier(0.4, 0, 0.2, 1);

  @media (prefers-reduced-motion: reduce) {
    transition: none;
  }

  &.r-float-button--with-text,
  &.r-float-button--pill {
    padding-left: var(--r-float-button-padding-x);
    padding-right: var(--r-float-button-padding-x);
  }

  &:hover:not(:disabled) {
    background-color: var(--r-float-button-bg-hover);
    color: var(--r-float-button-text-hover-color);
    box-shadow: var(--r-float-button-shadow-hover);
    transform: var(--r-float-button-transform-hover);
  }

  &:active:not(:disabled) {
    box-shadow: var(--r-float-button-shadow-active);
    transform: var(--r-float-button-transform-active);
  }

  &:focus-visible {
    outline: var(--r-float-button-outline);
    outline-offset: var(--r-float-button-outline-offset);
  }

  /* Press feedback lays one overlay over the resting fill instead of
     swapping it. */
  &:is(:hover, :active):not(:disabled) {
    background-image: linear-gradient(var(--r-float-button-press), var(--r-float-button-press));
  }

  /* Disabled is the sunken surface, not an opacity fade. */
  &:disabled {
    pointer-events: none;
    opacity: var(--r-float-button-opacity-disabled);
    cursor: not-allowed;
    border-color: var(--line-muted);
    background-color: var(--fill-muted);
    background-image: none;
    color: var(--r-float-button-text-disabled-color);
  }

  &.r-float-button--ghost:disabled {
    border-color: transparent;
    background-color: transparent;
  }

  & svg {
    pointer-events: none;
    flex-shrink: 0;
    width: var(--r-float-button-icon-size);
    height: var(--r-float-button-icon-size);
  }

  & > .r-float-button__content {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;

    &.r-float-button__content--with-desc {
      flex-direction: column;
      gap: 2px;
    }
  }

  &.r-float-button--square.r-float-button--with-desc {
    padding-top: 2px;
    padding-bottom: 2px;
  }

  & .r-float-button__text {
    display: inline-flex;
    align-items: center;
    line-height: 1;
    white-space: nowrap;
  }

  & .r-float-button__desc {
    font-size: var(--r-float-button-desc-font-size);
    text-align: center;
    line-height: 1.25;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* ─────────────────────────────────────────────────────────────────────────
   3. FloatButtonGroup
   ───────────────────────────────────────────────────────────────────────── */

.r-float-button-group {
  --r-float-button-group-gap: 10px;

  display: inline-flex;
  align-items: center;
  user-select: none;
  box-sizing: border-box;
  gap: var(--r-float-button-group-gap);

  &.r-float-button-group--vertical {
    flex-direction: column;
  }

  &.r-float-button-group--horizontal {
    flex-direction: row;
  }

  &.r-float-button-group--attached {
    --r-float-button-group-gap: 0px;
    gap: 0;
  }

  /* Attached: seamless borders */
  &.r-float-button-group--attached.r-float-button-group--vertical
    > .r-float-button:not(:last-child) {
    border-bottom-width: 0;
  }

  &.r-float-button-group--attached.r-float-button-group--vertical
    > .r-float-button:not(:first-child):not(:last-child) {
    border-radius: 0;
  }

  &.r-float-button-group--attached.r-float-button-group--horizontal
    > .r-float-button:not(:last-child) {
    border-right-width: 0;
  }

  &.r-float-button-group--attached.r-float-button-group--horizontal
    > .r-float-button:not(:first-child):not(:last-child) {
    border-radius: 0;
  }

  /* Attached square: square corners on every button; the outer-corner rules
     below round the ends of a run of two or more. */
  &.r-float-button-group--attached.r-float-button-group--square > .r-float-button {
    border-radius: 0;
  }

  /* Attached: control radius on the outer corners, whatever the shape */
  &.r-float-button-group--attached.r-float-button-group--vertical
    > .r-float-button:first-child:not(:last-child) {
    border-radius: 8px 8px 0 0;
  }

  &.r-float-button-group--attached.r-float-button-group--vertical
    > .r-float-button:last-child:not(:first-child) {
    border-radius: 0 0 8px 8px;
  }

  &.r-float-button-group--attached.r-float-button-group--horizontal
    > .r-float-button:first-child:not(:last-child) {
    border-radius: 8px 0 0 8px;
  }

  &.r-float-button-group--attached.r-float-button-group--horizontal
    > .r-float-button:last-child:not(:first-child) {
    border-radius: 0 8px 8px 0;
  }
}