@import '../../assets/style/colors.scss';

:host {
  --button-width: 28px;
  --button-height: 28px;
  --button-radius: var(--litpdf-button-radius, 4px);
  --button-color: var(--litpdf-button-background, transparent);
  --button-color-hover: var(--litpdf-icon-color-hover, #{map-get($primary-color-2, '75')});
  --button-border-hover: var(--litpdf-button-border-hover, #{map-get($primary-color, 'medium')});
  --button-background-hover: var(
    --litpdf-button-background-hover,
    color-mix(in srgb, #{map-get($primary-color, 'medium')} 12%, transparent)
  );
  --button-focus-ring: var(--litpdf-focus-ring-color, #{map-get($primary-color, 'medium')});
  --input-border: var(--litpdf-border-color, #{map-get($primary-color-2, '50')});
  --input-border-hover: var(--litpdf-border-color-hover, #{map-get($primary-color-2, '75')});
  // Fixed px (not a `%` height) so every separator — whether it's a direct
  // child of `:host` or nested inside a heightless `.container` — ends up
  // the same visual height. Kept at half the toolbar's own height, updated
  // alongside it in each breakpoint below.
  --separator-height: 21px;
  --toolbar-color: var(--litpdf-toolbar-background, #fff);
  --toolbar-shadow: var(--litpdf-toolbar-shadow, 0 1px 3px rgba(30, 16, 106, 0.15));
  color: var(--litpdf-icon-color, #{map-get($primary-color-2, 'normal')});

  display: flex;
  justify-content: center;
  align-items: center;
  // Spacing is driven entirely by `gap` (never per-element margins) so every
  // slot — button, field, separator or the "..." menu — is evenly spaced.
  // `gap` here separates the groups/separators; `.container` gap separates the
  // buttons within a group.
  gap: 16px;
  height: 42px;
  background-color: var(--toolbar-color);
  box-shadow: var(--toolbar-shadow);
  position: relative;
  z-index: 1;
  box-sizing: border-box;

  .container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
  }

  // The "..." overflow menu is only shown on small screens (see media query);
  // on wide screens the rotation buttons sit inline in the toolbar instead.
  .moreWrapper {
    display: none;
  }

  .moreIcon {
    font-size: 20px;
    line-height: 1;
    letter-spacing: 1px;
  }

  .sidebarIcon,
  .searchIcon,
  .fullscreenIcon {
    width: 16px;
    height: 16px;
  }

  .zoomPercent {
    display: flex;
    align-items: center;
    gap: 2px;
    font-size: 12px;
    color: inherit;
  }

  .zoomPercentInput {
    width: 36px;
    padding: 2px 4px;
    // Same 1px bordered look as `lit-input` (not the borderless
    // transparent/hover-fill treatment the icon buttons use), so it reads as
    // a text field rather than another toolbar button.
    border: 1px solid var(--input-border);
    border-radius: var(--button-radius);
    background-color: var(--litpdf-surface-background, #fff);
    color: inherit;
    font: inherit;
    font-size: 12px;
    text-align: right;
    box-sizing: border-box;
    transition:
      border-color 120ms,
      box-shadow 120ms;

    // Hide the native up/down spinners so the field reads as a plain
    // percentage display that happens to be editable.
    -moz-appearance: textfield;

    &::-webkit-outer-spin-button,
    &::-webkit-inner-spin-button {
      -webkit-appearance: none;
      margin: 0;
    }

    &:hover {
      border-color: var(--input-border-hover);
    }

    &:focus-visible {
      outline: 0;
      border-color: var(--button-focus-ring);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--button-focus-ring) 30%, transparent);
    }
  }

  .separator {
    align-self: center;
    height: var(--separator-height);
    width: 1px;
    background-color: var(--litpdf-border-color, #{map-get($primary-color-2, '50')});

    // The two separators between sections get their 16px spacing for free
    // from `:host`'s `gap`. This one sits inside `.actions`, whose `.container`
    // gap is only 8px, so it needs the difference added back on each side to
    // read with the same amount of space as the other two.
    &.inlineOnly {
      margin: 0 8px;
    }
  }

  .toolbarButton {
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--button-width);
    height: var(--button-height);
    // Transparent border (not `border: 0`) so the hover border doesn't shift
    // the button's box size — only its color changes.
    border: 1px solid transparent;
    outline: 0;
    border-radius: var(--button-radius);
    background-color: var(--button-color);
    // `<button>` doesn't inherit `color` from an ancestor like normal elements
    // do (it uses the UA's `buttontext` by default), so `--litpdf-icon-color`
    // set on `:host` would otherwise never reach the icon.
    color: inherit;
    box-sizing: border-box;
    cursor: pointer;

    &:disabled {
      opacity: 0.5;
      pointer-events: none;
    }

    &:hover {
      border-color: var(--button-border-hover);
      background-color: var(--button-background-hover);

      lit-icon,
      .sidebarIcon {
        color: var(--button-color-hover);
      }
    }

    // Visible ring for keyboard navigation only — a mouse/touch click that
    // lands focus here (`:focus`) stays ring-free (WCAG 2.4.11). A
    // `box-shadow` (not `outline` + `outline-offset`) so the ring hugs the
    // border-radius directly: the toolbar is only ~3px taller than the
    // button, and an offset outline's extra protrusion gets sliced off by
    // the viewer host's `overflow: hidden`.
    &:focus-visible {
      box-shadow: 0 0 0 2px var(--button-focus-ring);
    }

    // Toggle buttons (e.g. the sidebar toggle) reuse the hover treatment to
    // show they're "pressed" while their panel is open.
    &[aria-expanded='true'],
    &[aria-pressed='true'] {
      border-color: var(--button-border-hover);
      background-color: var(--button-background-hover);
    }
  }

  // On small screens the row can't hold every button, so we move the rotate
  // and fullscreen actions into the "..." overflow menu (print/download/
  // search stay inline — we have the room now that page navigation lives in
  // its own floating pagination pill) and enlarge the remaining controls to
  // comfortable ~44px touch targets (Apple HIG minimum).
  @media (max-width: 600px) {
    --button-width: 44px;
    --button-height: 44px;

    // Tighter than the desktop 16px/8px gaps — the search button (always
    // inline, unlike rotate/fullscreen) adds width back that the overflow
    // menu doesn't reclaim, so the row needs to run leaner to still fit on
    // mainstream phone widths (~375px+) without horizontal scrolling.
    gap: 4px;
    height: 48px;
    --separator-height: 24px;

    .container {
      gap: 4px;
    }

    // Hide the inline rotate/fullscreen buttons and their separator; they
    // live in the "..." menu instead.
    .inlineOnly {
      display: none;
    }

    .moreWrapper {
      display: inline-flex;
    }

    .zoomPercentInput {
      width: 32px;
      font-size: 14px;
    }

    // Drop the "%" suffix — the field is already labelled for screen
    // readers via aria-label, and every pixel counts on phone widths.
    .zoomPercent span {
      display: none;
    }
  }

  // Very narrow phones (≈320px) can't fit the whole row of 44px targets; shrink
  // them a little so the bar still fits rather than bringing back a horizontal
  // scrollbar. Mainstream widths (360px+) keep the full 44px targets above.
  @media (max-width: 359px) {
    --button-width: 40px;
    --button-height: 40px;

    height: 44px;
    --separator-height: 22px;

    .zoomPercentInput {
      width: 30px;
    }
  }
}