// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

@import 'feature-callout-theme';

/* stylelint-disable max-nesting-depth */

#feature-callout {
  // See _feature-callout-theme.scss for the theme mixins and
  // FeatureCallout.sys.mjs for the color values
  @include light-theme;

  position: absolute;
  z-index: 2147483647;
  outline: none;
  color: var(--fc-color);
  accent-color: var(--fc-accent-color);
  // Make sure HTML content uses non-native theming, even in chrome windows.
  -moz-theme: non-native;
  -moz-window-shadow: none;

  @media (prefers-color-scheme: dark) {
    @include dark-theme;
  }

  @at-root :root[lwt-popup='light'] #{&}:not(.simulateContent) {
    color-scheme: light;

    @include light-theme;
  }

  @at-root :root[lwt-popup='dark'] #{&}:not(.simulateContent) {
    color-scheme: dark;

    @include dark-theme;
  }

  @media (prefers-contrast) {
    @include hcm-theme;
  }

  // Account for feature callouts that may be rendered in the chrome but
  // displayed on top of content. Each context has its own color scheme, so they
  // may not match. In that case, we use the special media query below.
  &.simulateContent {
    color-scheme: env(-moz-content-preferred-color-scheme);

    // TODO - replace 2 mixins with a single mixin with light-dark() values.
    @media (-moz-content-prefers-color-scheme: light) {
      @include light-theme;
    }

    @media (-moz-content-prefers-color-scheme: dark) {
      @include dark-theme;
    }

    @at-root :root[lwt-newtab-brighttext] #{&}.lwtNewtab {
      color-scheme: dark;

      @include dark-theme;
    }

    @media (prefers-contrast) {
      @include hcm-theme;
    }
  }

  // The desired width of the arrow (the triangle base).
  --arrow-width: 33.9411px;
  // The width/height of the square that, rotated 90deg, will become the arrow.
  --arrow-square-size: calc(var(--arrow-width) / sqrt(2));
  // After rotating, the width is no longer the square width. It's now equal to
  // the diagonal from corner to corner, i.e. √2 * the square width. We need to
  // account for this extra width in some calculations.
  --extra-width-from-rotation: calc(var(--arrow-width) - var(--arrow-square-size));
  // The height of the arrow, once rotated and cut in half.
  --arrow-visible-height: calc(var(--arrow-width) / 2);
  // Half the width/height of the square. Calculations on the arrow itself need
  // to treat the arrow as a square, since they are operating on the element
  // _before_ it is rotated. Calculations on other elements (like the panel
  // margin that needs to make space for the arrow) should use the visible
  // height that treats it as a triangle.
  --arrow-visible-size: calc(var(--arrow-square-size) / 2);
  --arrow-center-inset: calc(50% - var(--arrow-visible-size));
  // Move the arrow 1.5px closer to the callout to account for subpixel rounding
  // differences, which might cause the corners of the arrow (which is actually
  // a rotated square) to be visible.
  --arrow-offset: calc(1.5px - var(--arrow-visible-size));
  // For positions like top-end, the arrow is 12px away from the corner.
  --arrow-corner-distance: 12px;
  --arrow-corner-inset: calc(var(--arrow-corner-distance) + (var(--extra-width-from-rotation) / 2));
  --arrow-overlap-magnitude: 5px;
  // Default min-height for feature callout ctas
  --button-min-height: 24px;

  @at-root panel#{&} {
    --panel-color: var(--fc-color);
    --panel-shadow: none;
    // Extra space around the panel for the shadow to be drawn in. The panel
    // content can't overflow the XUL popup frame, so the frame must be extended.
    --panel-shadow-margin: 6px;
    // The panel needs more extra space on the side that the arrow is on, since
    // the arrow is absolute positioned. This adds the visible height of the
    // arrow to the margin and subtracts 1 since the arrow is inset by 1.5px
    // (see --arrow-offset).
    --panel-arrow-space: calc(var(--panel-shadow-margin) + var(--arrow-visible-height) - 1.5px);
    // The callout starts with its edge aligned with the edge of the anchor. But
    // we want the arrow to align to the anchor, not the callout edge. So we need
    // to offset the callout by the arrow size and margin, as well as the margin
    // of the entire callout (it has margins on all sides to make room for the
    // shadow when displayed in a panel, which would normally cut off the shadow).
    --panel-margin-offset: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-corner-distance) + (var(--arrow-width) / 2)));
  }

  @at-root panel#{&}::part(content) {
    width: initial;
    border: 0;
    border-radius: 0;
    padding: 0;
    margin: var(--panel-shadow-margin);
    background: none;
    color: inherit;
    // stylelint-disable-next-line declaration-no-important
    overflow: visible !important;
  }

  @at-root div#{&} {
    transition: opacity 0.5s ease;

    &.hidden {
      opacity: 0;
      pointer-events: none;
    }
  }

  .onboardingContainer,
  .onboardingContainer .outer-wrapper {
    // Override the element transitions from aboutwelcome.scss
    --transition: none;

    // auto height to allow for arrow positioning based on height
    height: auto;

    // use a different approach to flipping to avoid the fuzzy aliasing that
    // transform causes.
    transform: none;
  }

  .screen {
    // override the RTL transform in about:welcome
    &:dir(rtl) {
      transform: none;
    }

    &[pos='callout'] {
      height: fit-content;
      min-height: unset;
      overflow: visible;

      &[layout='inline'] {
        .section-main {
          .main-content,
          .main-content.no-steps {
            width: 18em;
            padding-inline: 16px;
            padding-block: 0;

            .welcome-text {
              // Same height as the dismiss button
              height: 24px;
              margin-block: 12px;
              margin-inline: 0;
              padding: 0;
              white-space: nowrap;
            }
          }

          .dismiss-button {
            height: 24px;
            width: 24px;
            min-height: 24px;
            min-width: 24px;
            margin: 0;
            top: calc(50% - 12px);
            inset-inline-end: 12px;
          }
        }
      }

      .logo-container {
        display: flex;
        justify-content: center;

        .brand-logo {
          margin: 0;

          // This may not work for all future messages, so we may want to make
          // flipping the logo image in RTL mode configurable
          &:dir(rtl) {
            transform: rotateY(180deg);
          }
        }
      }

      .welcome-text {
        align-items: start;
        text-align: start;
        margin: 0;
        padding: 0;
        gap: 8px;

        h1,
        h2 {
          font-size: 0.813em;
          margin: 0;
          color: inherit;
        }

        h1 {
          font-weight: 600;
        }

        .inline-icon-container {
          display: flex;
          flex-flow: row wrap;
          align-items: center;

          .logo-container {
            height: 16px;
            width: 16px;
            margin-inline-end: 6px;
            box-sizing: border-box;
            -moz-context-properties: fill;
            fill: currentColor;

            img {
              height: 16px;
              width: 16px;
              margin: 0;
            }
          }

          &[alignment='top'],
          &[alignment='bottom'] {
            flex-wrap: nowrap;

            .logo-container {
              height: 1.5em; // match the title's line-height
              align-items: center;
              padding-bottom: 0.15em;
              box-sizing: border-box;
            }
          }

          &[alignment='top'] {
            align-items: start;
          }

          &[alignment='bottom'] {
            align-items: end;
          }
        }

      }

      .multi-select-container {
        margin: 0;
        font-size: 0.813em;
        row-gap: 12px;
        color: inherit;
        overflow: visible;

        #multi-stage-multi-select-label {
          font-size: inherit;
          // There's a 12px gap that pushes the .multi-select-container down
          // away from the .welcome-text. And there's an 8px gap between the h1
          // and h2 in the .welcome-text container. So subtract 4px to get the
          // desired 8px margin, so spacing is the same as for `subtitle`.
          margin: -4px 0 0;
          color: inherit;
        }
      }

      .cta-link {
        background: none;
        text-decoration: underline;
        cursor: pointer;
        border: none;
        padding: 0;
        color: var(--fc-link-color);
        order: -1;
        margin-inline-end: auto;
        margin-block: 8px;

        &:hover {
          color: var(--fc-link-color-hover);
        }

        &:active {
          color: var(--fc-link-color-active);
        }
      }

      // Secondary section is not included in callouts
      .section-secondary {
        display: none;
      }

      .section-main {
        height: fit-content;
        width: fit-content;

        .main-content {
          position: relative;
          overflow: hidden;
          border: 1px solid var(--fc-border);
          box-shadow: 0 2px 5px rgba(0, 0, 0, 15%);
          border-radius: 4px;
          padding: var(--callout-padding, 16px);
          width: 25em;
          gap: 16px;
          background: var(--fc-background);

          .main-content-inner {
            gap: 12px;

            .legal-paragraph {
              .text-link {
                color: var(--fc-color);
              }
            }
          }

          .steps {
            height: auto;
            position: absolute;
            // 16px is the callout's default bottom padding. The CTAs are 24px
            // tall by default, and the steps are 8px tall. So we need to offset
            // the steps by half the difference in order to center them.
            bottom: calc(var(--callout-padding, 16px) + (var(--cta-height, 24px) / 2) - 4px);
            padding-block: 0;

            .indicator {
              // using border will show up in Windows High Contrast Mode to improve accessibility.
              border: 4px solid var(--fc-step-color);

              &.current {
                border-color: var(--fc-accent-color);
              }
            }

            &:not(.progress-bar) {
              flex-flow: row nowrap;
              gap: 8px;

              .indicator {
                margin: 0;
              }
            }

            & .indicator.current,
            &.progress-bar .indicator.complete {
              border-color: var(--fc-accent-color);
            }
          }
        }

        .dismiss-button {
          font-size: 1em;
          inset-block: 0 auto;
          inset-inline: auto 0;
          margin-block: 16px 0;
          margin-inline: 0 16px;
          background-color: transparent;

          &[button-size='small'] {
            height: 24px;
            width: 24px;
            min-height: 24px;
            min-width: 24px;
          }

          &.with-background {
            background: url('chrome://global/skin/icons/close.svg') no-repeat center / 16px, var(--fc-dismiss-button-bg);

            &:hover {
              background: url('chrome://global/skin/icons/close.svg') no-repeat center / 16px, var(--fc-dismiss-button-bg-hover);

              &:active {
                background: url('chrome://global/skin/icons/close.svg') no-repeat center / 16px, var(--fc-dismiss-button-bg-active);
              }
            }
          }
        }
      }

      .action-buttons {
        display: flex;
        flex-flow: row nowrap;
        align-items: stretch;
        justify-content: end;
        gap: 10px;
        // The Figma spec wants a 16px gap between major content blocks and the
        // action buttons. But the action buttons are siblings with the minor
        // content blocks, which want a 12px gap. So we use a 12px gap and just
        // add 4px of margin to the action buttons.
        margin-top: 4px;

        &[alignment='start'] {
          justify-content: start;
        }

        &[alignment='space-between'] {
          justify-content: space-between;
        }

        .secondary-cta {
          font-size: inherit;
        }

        .primary,
        .secondary {
          padding: 4px 16px;
          margin: 0;
          font-size: 0.813em;
          font-weight: 600;
          line-height: 16px;
          min-height: var(--button-min-height);
          text-decoration: none;
          cursor: default;
        }

        .secondary {
          background-color: var(--fc-button-background);
        }

        .primary {
          background-color: var(--fc-primary-button-background);
        }

        .split-button-container {
          align-items: stretch;

          &:not([hidden]) {
            display: flex;
          }

          .primary,
          .secondary,
          .additional-cta {
            &:not(.submenu-button) {
              border-start-end-radius: 0;
              border-end-end-radius: 0;
              margin-inline-end: 0;
            }

            &:focus-visible {
              z-index: 2;
            }
          }

          .submenu-button {
            border-start-start-radius: 0;
            border-end-start-radius: 0;
            margin-inline-start: 1px;
            padding: 8px;
            min-height: var(--button-min-height);
            min-width: 30px;
            box-sizing: border-box;
            background-image: url('chrome://global/skin/icons/arrow-down.svg');
            background-repeat: no-repeat;
            background-size: 16px;
            background-position: center;
            -moz-context-properties: fill;
            fill: currentColor;
          }
        }
      }

      .action-buttons .primary,
      .action-buttons .secondary,
      .dismiss-button {
        border-radius: 4px;

        &:focus-visible {
          box-shadow: none;
          outline: 2px solid var(--fc-accent-color);
          outline-offset: 2px;
        }

        &:disabled {
          opacity: 0.4;
          cursor: auto;
        }
      }

      .action-buttons .secondary,
      .dismiss-button {
        border: 1px solid var(--fc-button-border);
        color: var(--fc-button-color);

        &:hover:not(:disabled),
        &[open] {
          background-color: var(--fc-button-background-hover);
          color: var(--fc-button-color-hover);
          border: 1px solid var(--fc-button-border-hover);

          &:active {
            background-color: var(--fc-button-background-active);
            color: var(--fc-button-color-active);
            border: 1px solid var(--fc-button-border-active);
          }
        }
      }

      .action-buttons .primary {
        border: 1px solid var(--fc-primary-button-border);
        color: var(--fc-primary-button-color);

        &:hover:not(:disabled),
        &[open] {
          background-color: var(--fc-primary-button-background-hover);
          color: var(--fc-primary-button-color-hover);
          border: 1px solid var(--fc-primary-button-border-hover);

          &:active {
            background-color: var(--fc-primary-button-background-active);
            color: var(--fc-primary-button-color-active);
            border: 1px solid var(--fc-primary-button-border-active);
          }
        }
      }

      .action-checklist {
        display: flex;
        flex-direction: column;

        .action-checklist-subtitle {
          text-align: start;
          margin-block-end: 8px;
        }

        .action-checklist-divider {
          margin-block: 0;
          width: 100%;
          color: var(--fc-button-background);
        }

        .action-checklist-progress-bar {
          width: 100%;
          height: 6px;
          padding-block: 0;
          background-color: color-mix(in srgb, var(--fc-color) 25%, transparent);
          opacity: 1;
          transition: none;
          border-radius: 8px;
          display: flex;
          justify-content: flex-start;
          margin-block-end: 16px;

          &:dir(rtl) {
            justify-content: flex-end;
          }

          .indicator {
            width: var(--action-checklist-progress-bar-progress);
            height: 100%;
            background-color: var(--fc-accent-color);
            border: 0;
            border-radius: 8px;
            opacity: 1;
            transition: var(--progress-bar-transition);
          }
        }

        .action-checklist-items {
          display: flex;
          flex-direction: column;

          button {
            &:first-child {
              margin-block-start: 0;
            }

            &:last-child {
              margin-block-end: 0;
            }

            // TODO: This is (very) likely to change
            &:not(:disabled):hover {
              background-color: var(--fc-button-background-hover);
            }

            &:disabled {
              color: var(--fc-color);
            }

            .action-checklist-label-container {
              display: flex;
              align-items: center;

              span {
                text-align: start;
              }

              .check-icon-container {
                margin-block-start: 2px;
              }

              .check-empty, .check-filled {
                margin-inline-end: 8px;
                flex-shrink: 0;
              }

              .check-empty {
                border-radius: 50%;
                width: 0.75em;
                height: 0.75em;
                border: 2px solid color-mix(in srgb, var(--fc-color) 25%, transparent);
              }

              .check-filled {
                background-image: url('chrome://global/skin/icons/check-filled.svg');
                fill: var(--fc-icon-success-color);
              }
            }

            .external-link-icon, .check-filled {
              border: none;
              width: 1em;
              height: 1em;
              background-repeat: no-repeat;
              background-position: center;
              background-size: contain;
              -moz-context-properties: fill;
            }

            .external-link-icon-container {
              .external-link-icon {
                background-image: url('chrome://global/skin/icons/open-in-new.svg');
                fill: var(--fc-color);
              }
            }

            background: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-inline: 0;
            margin-block: 4px;
            border: none;
            border-radius: 4px;
            padding-block: 8px;
          }
        }
      }
    }
  }

  @at-root panel#{&}:is([side='top'], [side='bottom']):not([hide-arrow='permanent']) {
    margin-inline: var(--panel-margin-offset);
  }

  @at-root panel#{&}:is([side='left'], [side='right']):not([hide-arrow='permanent']) {
    margin-block: var(--panel-margin-offset);
  }

  @at-root panel#{&}::part(content) {
    position: relative;
  }

  // all visible callout arrow boxes. boxes are for rotating 45 degrees, arrows
  // are for the actual arrow shape and are children of the boxes.
  .arrow-box {
    position: absolute;
    overflow: visible;
    transform: rotate(45deg);
    // keep the border crisp under transformation
    transform-style: preserve-3d;
  }

  &:not([arrow-position]) .arrow-box,
  &[hide-arrow] .arrow-box {
    display: none;
  }

  // both shadow arrow and background arrow
  .arrow {
    width: var(--arrow-square-size);
    height: var(--arrow-square-size);
  }

  // the arrow's shadow box
  .shadow-arrow-box {
    z-index: -1;
  }

  // the arrow's shadow
  .shadow-arrow {
    background: transparent;
    outline: 1px solid var(--fc-border);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 15%);
  }

  // the 'filled' arrow box
  .background-arrow-box {
    z-index: 1;
    // the background arrow technically can overlap the dismiss button. it
    // doesn't visibly overlap it because of the clip-path rule below, but it
    // can still be clicked. so we need to make sure it doesn't block inputs on
    // the button. the visible part of the arrow can still catch clicks because
    // we don't add this rule to .shadow-arrow-box.
    pointer-events: none;
  }

  // the 'filled' arrow
  .background-arrow {
    background: var(--fc-background);
    clip-path: var(--fc-arrow-clip-path);
  }

  // top (center) arrow positioning
  &[arrow-position='top'] .arrow-box {
    top: var(--arrow-offset);
    inset-inline-start: var(--arrow-center-inset);
    // the callout arrow is actually a diamond (a rotated square), with the
    // lower half invisible. the part that appears in front of the callout has
    // only a background, so that where it overlaps the callout's border, the
    // border is not visible. the part that appears behind the callout has only
    // a border/shadow, so that it can't be seen overlapping the callout. but
    // because the background is the same color as the callout, that half of the
    // diamond would visibly overlap any callout content that happens to be in
    // the same place. so we clip it to a triangle, with a 2% extension on the
    // bottom to account for any subpixel rounding differences.
    --fc-arrow-clip-path: polygon(100% 0, 100% 2%, 2% 100%, 0 100%, 0 0);
  }

  @at-root panel#{&}[arrow-position='top']::part(content) {
    margin-top: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='top'] {
    margin-top: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // bottom (center) arrow positioning
  &[arrow-position='bottom'] .arrow-box {
    bottom: var(--arrow-offset);
    inset-inline-start: var(--arrow-center-inset);
    --fc-arrow-clip-path: polygon(100% 0, 98% 0, 0 98%, 0 100%, 100% 100%);
  }

  @at-root panel#{&}[arrow-position='bottom']::part(content) {
    margin-bottom: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='bottom'] {
    margin-bottom: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // end (center) arrow positioning
  &[arrow-position='inline-end'] .arrow-box {
    top: var(--arrow-center-inset);
    inset-inline-end: var(--arrow-offset);
    --fc-arrow-clip-path: polygon(100% 0, 100% 100%, 98% 100%, 0 2%, 0 0);
  }

  @at-root panel#{&}[arrow-position='inline-end']::part(content) {
    margin-inline-end: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='inline-end'] {
    margin-inline-end: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // start (center) arrow positioning
  &[arrow-position='inline-start'] .arrow-box {
    top: var(--arrow-center-inset);
    inset-inline-start: var(--arrow-offset);
    --fc-arrow-clip-path: polygon(0 100%, 100% 100%, 100% 98%, 2% 0, 0 0);
  }

  @at-root panel#{&}[arrow-position='inline-start']::part(content) {
    margin-inline-start: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='inline-start'] {
    margin-inline-start: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // top-end arrow positioning
  &[arrow-position='top-end'] .arrow-box {
    top: var(--arrow-offset);
    inset-inline-end: var(--arrow-corner-inset);
    --fc-arrow-clip-path: polygon(100% 0, 100% 2%, 2% 100%, 0 100%, 0 0);
  }

  @at-root panel#{&}[arrow-position='top-end']::part(content) {
    margin-top: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='top-end'] {
    margin-top: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // top-start arrow positioning
  &[arrow-position='top-start'] .arrow-box {
    top: var(--arrow-offset);
    inset-inline-start: var(--arrow-corner-inset);
    --fc-arrow-clip-path: polygon(100% 0, 100% 2%, 2% 100%, 0 100%, 0 0);
  }

  @at-root panel#{&}[arrow-position='top-start']::part(content) {
    margin-top: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='top-start'] {
    margin-top: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // bottom-end arrow positioning
  &[arrow-position='bottom-end'] .arrow-box {
    bottom: var(--arrow-offset);
    inset-inline-end: var(--arrow-corner-inset);
    --fc-arrow-clip-path: polygon(100% 0, 98% 0, 0 98%, 0 100%, 100% 100%);
  }

  @at-root panel#{&}[arrow-position='bottom-end']::part(content) {
    margin-bottom: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='bottom-end'] {
    margin-bottom: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // bottom-start arrow positioning
  &[arrow-position='bottom-start'] .arrow-box {
    bottom: var(--arrow-offset);
    inset-inline-start: var(--arrow-corner-inset);
    --fc-arrow-clip-path: polygon(100% 0, 98% 0, 0 98%, 0 100%, 100% 100%);
  }

  @at-root panel#{&}[arrow-position='bottom-start']::part(content) {
    margin-bottom: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='bottom-start'] {
    margin-bottom: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // inline-end-top arrow positioning
  &[arrow-position='inline-end-top'] .arrow-box {
    top: var(--arrow-corner-inset);
    inset-inline-end: var(--arrow-offset);
    --fc-arrow-clip-path: polygon(100% 0, 100% 100%, 98% 100%, 0 2%, 0 0);
  }

  @at-root panel#{&}[arrow-position='inline-end-top']::part(content) {
    margin-inline-end: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='inline-end-top'] {
    margin-inline-end: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // inline-end-bottom arrow positioning
  &[arrow-position='inline-end-bottom'] .arrow-box {
    bottom: var(--arrow-corner-inset);
    inset-inline-end: var(--arrow-offset);
    --fc-arrow-clip-path: polygon(100% 0, 100% 100%, 98% 100%, 0 2%, 0 0);
  }

  @at-root panel#{&}[arrow-position='inline-end-bottom']::part(content) {
    margin-inline-end: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='inline-end-bottom'] {
    margin-inline-end: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // inline-start-top arrow positioning
  &[arrow-position='inline-start-top'] .arrow-box {
    top: var(--arrow-corner-inset);
    inset-inline-start: var(--arrow-offset);
    --fc-arrow-clip-path: polygon(0 100%, 100% 100%, 100% 98%, 2% 0, 0 0);
  }

  @at-root panel#{&}[arrow-position='inline-start-top']::part(content) {
    margin-inline-start: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='inline-start-top'] {
    margin-inline-start: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }

  // inline-start-bottom arrow positioning
  &[arrow-position='inline-start-bottom'] .arrow-box {
    bottom: var(--arrow-corner-inset);
    inset-inline-start: var(--arrow-offset);
    --fc-arrow-clip-path: polygon(0 100%, 100% 100%, 100% 98%, 2% 0, 0 0);
  }

  @at-root panel#{&}[arrow-position='inline-start-bottom']::part(content) {
    margin-inline-start: var(--panel-arrow-space);
  }

  @at-root panel#{&}[arrow-position='inline-start-bottom'] {
    margin-inline-start: calc(-1 * (var(--panel-shadow-margin) + var(--arrow-overlap-magnitude)));
  }
}