/**
 * Copyright Aquera Inc 2023
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */

import { css } from 'lit';

/**
 * NavTabGroup CSS
 */
export const styles = css`
 
  [hidden] {
    display: none;
  }

  :host {
    --indicator-color: var(--nile-colors-primary-600, var(--ng-colors-text-brand-secondary-700));
    --track-color: var(--nile-colors-neutral-400, var(--ng-componentcolors-utility-gray-500));
    --track-width: var(--nile-border-width-1, var(--ng-border-width-1));
    --tab-gap: var(--nile-spacing-lg, var(--ng-spacing-lg));
    -webkit-font-smoothing: var(--nile-webkit-font-smoothing, var(--ng-webkit-font-smoothing));
    -moz-osx-font-smoothing: var(--nile-moz-osx-font-smoothing, var(--ng-moz-osx-font-smoothing));
    text-rendering: var(--nile-text-rendering, var(--ng-text-rendering));
    display: block;

    --nile-nav-tab-padding: var(--nile-spacing-none, var(--ng-spacing-none))  var(--nile-spacing-none, var(--ng-spacing-none))  var(--nile-spacing-lg, var(--ng-spacing-lg)) var(--nile-spacing-none, var(--ng-spacing-none)) ;  
  }

    
  .nav-tab-group {
    display: flex;
    border-radius: var(--nile-radius-none, var(--ng-radius-none));
  }

  .nav-tab-group__tabs {
    display: flex;
    position: relative;
    gap: var(--tab-gap);
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .hide__track {
    --track-width: 0px;
    --tab-gap: var(--nile-spacing-3px, var(--ng-spacing-xs));
  }

  .nav-tab-group__body {
    display: block;
    overflow: auto;
  }

  /* --------------------------------------------------------------------------
   * Nav container, scroll buttons, RTL
   * -------------------------------------------------------------------------- */

  .nav-tab-group--has-scroll-controls .nav-tab-group__nav-container {
    position: relative;
    padding: var(--nile-spacing-none, var(--ng-spacing-none)) var(--nile-spacing-10px, var(--ng-spacing-lg));
  }
  
  :host([variant='toggle']) .nav-tab-group--has-scroll-controls .nav-tab-group__nav-container,
  :host([variant='toggle-button']) .nav-tab-group--has-scroll-controls .nav-tab-group__nav-container {
    padding: 0;
  }

  :host([variant='toggle']) .nav-tab-group--has-scroll-controls .nav-tab-group__nav,
  :host([variant='toggle-button']) .nav-tab-group--has-scroll-controls .nav-tab-group__nav {
    scroll-padding-inline: var(--nile-width-20px, var(--ng-width-5));
  }

  .nav-tab-group__scroll-button {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 0;
    bottom: 0;
    width: var(--nile-width-20px, var(--ng-width-5));
  }

  .nav-tab-group__scroll-button--start {
    left: 0;
  }

  .nav-tab-group__scroll-button--end {
    right: 0;
  }

  .nav-tab-group--rtl .nav-tab-group__scroll-button--start {
    left: auto;
    right: -20px;
  }

  .nav-tab-group--rtl .nav-tab-group__scroll-button--end {
    left: -20px;
    right: auto;
  }

  /* --------------------------------------------------------------------------
   * Indicator, path, pill, no-track
   * -------------------------------------------------------------------------- */

  .nav-tab-group__indicator {
    position: absolute;
    transition: 0.3s translate ease, 0.3s width ease;
    z-index: 2;
  }

  .nav-tab-group__indicator__path {
    position: absolute;
    height: var(--track-width);
    width: 100%;
    background: var(--nile-colors-neutral-400, var(--ng-colors-bg-quaternary));
    bottom: 0px;
    z-index: 0;
  }



  .nav-tab-group__indicator--no-track {
    display: none;
  }

  .nav-tab-group__pill {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    box-sizing: border-box;
    border-radius: var(--nile-nav-tab-radius);
    background: var(--nile-nav-tab-bg-active);
    box-shadow: var(--nile-nav-tab-active-box-shadow, none);
    opacity: 0;
    pointer-events: none;
  }

  .nav-tab-group__pill.nav-tab-group__pill--inactive {
    opacity: 0;
    transition: none;
    transform: none;
    left: 0;
    right: auto;
    top: 0;
    width: auto;
    height: auto;
  }

  /* Idle: stroke only on the active tab. While moving, .pill--transitioning matches tab border (see positionPill). */
  :host([variant='toggle']) .nav-tab-group__pill {
    border: none;
    
  }

  :host([variant='toggle']) .nav-tab-group__pill.nav-tab-group__pill--transitioning {
    border: var(--nile-nav-tab-border);
    overflow: hidden;
  }

  /* Shadow lives on the active tab container so selection never flashes unshaded while the pill moves. */
  :host([variant='toggle-button']) .nav-tab-group__pill {
    box-shadow: none;
  }

  /* --------------------------------------------------------------------------
   * Placement: top
   * -------------------------------------------------------------------------- */

  .nav-tab-group--top {
    flex-direction: column;
  }

  .nav-tab-group--top .nav-tab-group__nav-container {
    order: 1;
  }

  .nav-tab-group--top .nav-tab-group__nav,
  .nav-tab-group--bottom .nav-tab-group__nav {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .nav-tab-group--top .nav-tab-group__nav::-webkit-scrollbar,
  .nav-tab-group--bottom .nav-tab-group__nav::-webkit-scrollbar {
    width: 0;
    height: 0;
  }

  .nav-tab-group--top .nav-tab-group__tabs {
    flex: 1 1 auto;
    position: relative;
    flex-direction: row;
  }

  .nav-tab-group--top .nav-tab-group__indicator {
    bottom: 0px;
    border-bottom: 2px solid var(--nile-colors-primary-600, var(--ng-colors-text-brand-secondary-700));
    z-index: 0;
  }

  .nav-tab-group--top .nav-tab-group__body {
    order: 2;
  }

  .nav-tab-group--top ::slotted(nile-nav-tab-panel) {
    --padding: var(--nile-spacing-10px, var(--ng-spacing-lg)) var(--nile-spacing-none, var(--ng-spacing-none));
  }

  /* --------------------------------------------------------------------------
   * Placement: bottom
   * -------------------------------------------------------------------------- */

  .nav-tab-group--bottom {
    flex-direction: column;
  }

  .nav-tab-group--bottom .nav-tab-group__nav-container {
    order: 2;
  }

  .nav-tab-group--bottom .nav-tab-group__tabs {
    flex: 1 1 auto;
    position: relative;
    flex-direction: row;
    border-top: solid var(--track-width) var(--track-color);
  }

  :host(:is([variant='filled'], [variant='neutral-filled'], [variant='toggle'], [variant='toggle-button']))
  .nav-tab-group--bottom .nav-tab-group__tabs {
    border-top: none;
  }

  :host(:is([variant='filled'], [variant='neutral-filled'], [variant='toggle-button'], [variant='toggle']))
  .nav-tab-group--top .nav-tab-group__nav,
  :host(:is([variant='filled'], [variant='neutral-filled'], [variant='toggle-button'], [variant='toggle']))
  .nav-tab-group--bottom .nav-tab-group__nav {
    overflow: auto;
  }

  /* Symmetric inset so box-shadow isn’t clipped and the strip stays vertically centered (end-only
     padding made top/bottom look uneven). */
  :host([variant='toggle-button']) .nav-tab-group--top .nav-tab-group__nav,
  :host([variant='toggle-button']) .nav-tab-group--bottom .nav-tab-group__nav {
    padding-block: var(--nile-spacing-xs, var(--ng-spacing-xs));
    box-sizing: border-box;
    align-items: center;
    padding-inline: var(--nile-spacing-xs, var(--ng-spacing-xs));
  }

  .nav-tab-group--bottom .nav-tab-group__indicator {
    top: calc(-1 * var(--track-width));
    border-top: solid var(--nile-border-width-2, var(--ng-border-width-2)) var(--indicator-color);
  }

  .nav-tab-group--bottom .nav-tab-group__body {
    order: 1;
  }

  .nav-tab-group--bottom ::slotted(nile-nav-tab-panel) {
    --padding: var(--nile-spacing-none, var(--ng-spacing-none)) var(--nile-spacing-none, var(--ng-spacing-none))
      var(--nile-spacing-10px, var(--ng-spacing-lg)) var(--nile-spacing-none, var(--ng-spacing-none));
  }

  /* --------------------------------------------------------------------------
   * Placement: start
   * -------------------------------------------------------------------------- */

  .nav-tab-group--start {
    flex-direction: row;
  }

  .nav-tab-group--start .nav-tab-group__nav-container {
    order: 1;
  }

  .nav-tab-group--start .nav-tab-group__tabs {
    flex: 0 0 auto;
    flex-direction: column;
    border-inline-end: solid var(--track-width) var(--track-color);
  }

  /* Block-level tab hosts match the flex column and full row height (wrap, multi-line labels). */
  .nav-tab-group--start slot[name='nav']::slotted(nile-nav-tab),
  .nav-tab-group--end slot[name='nav']::slotted(nile-nav-tab) {
    display: block;
    width: 100%;
    box-sizing: border-box;
  }

  :host([variant='filled']) .nav-tab-group--start .nav-tab-group__tabs {
    border-inline-end: none;
  }

  .nav-tab-group--start .nav-tab-group__indicator {
    top: 0;
    right: calc(-1 * var(--track-width));
    border-right: solid var(--nile-width-2px, var(--ng-border-width-2)) var(--indicator-color);
  }

  .nav-tab-group--start .nav-tab-group__body {
    flex: 1 1 auto;
    order: 2;
  }

  .nav-tab-group--start .nav-tab-group__indicator__path,
  .nav-tab-group--bottom .nav-tab-group__indicator__path,
  .nav-tab-group--end .nav-tab-group__indicator__path {
    display: none;
  }

  /* --------------------------------------------------------------------------
   * Placement: end
   * -------------------------------------------------------------------------- */

  .nav-tab-group--end {
    flex-direction: row;
  }

  .nav-tab-group--end .nav-tab-group__nav-container {
    order: 2;
  }

  .nav-tab-group--end .nav-tab-group__tabs {
    flex: 0 0 auto;
    flex-direction: column;
    border-inline-start: solid var(--track-width) var(--track-color);
  }

  :host([variant='filled']) .nav-tab-group--end .nav-tab-group__tabs {
    border-inline-start: none;
  }

  .nav-tab-group--end .nav-tab-group__indicator {
    top: 0;
    left: calc(-1 * var(--track-width));
    border-left: solid var(--nile-width-2px, var(--ng-border-width-2)) var(--indicator-color);
  }

  .nav-tab-group--end .nav-tab-group__body {
    flex: 1 1 auto;
    order: 1;
  }

  /* Start & end: same horizontal panel padding */
  .nav-tab-group--start ::slotted(nile-nav-tab-panel),
  .nav-tab-group--end ::slotted(nile-nav-tab-panel) {
    --padding: var(--nile-spacing-none, var(--ng-spacing-none)) var(--nile-spacing-10px, var(--ng-spacing-lg));
  }

  /* --------------------------------------------------------------------------
   * hide__track: slotted tab tokens
   * -------------------------------------------------------------------------- */

  .hide__track slot::slotted(nile-nav-tab) {
    --nile-nav-tab-radius: var(--nile-radius-radius-xs, var(--ng-radius-xs));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --nile-nav-tab-height: auto;
    --nile-nav-tab-bg-hover: var(--nile-colors-neutral-100, var(--ng-colors-bg-secondary));
    --nile-nav-tab-bg-active: var(--nile-colors-brand-50, var(--ng-colors-bg-brand-primary-alt));
  }

  /* --------------------------------------------------------------------------
   * fullWidth
   * -------------------------------------------------------------------------- */

  :host([fullWidth]) .nav-tab-group__tabs {
    width: 100%;
    flex: 1 1 auto;
  }

  :host([fullWidth]) ::slotted(nile-nav-tab) {
    flex: 1;
    min-width: 0;
  }

  :host([fullWidth]) .nav-tab-group.nav-tab-group--top .nav-tab-group__tabs {
    display: flex;
  }

  :host([fullWidth]) {
    --justify-content: center;
  }

  /* --------------------------------------------------------------------------
   * Variants: filled, neutral-filled, toggle, toggle-button
   * -------------------------------------------------------------------------- */

  :host([variant='filled']) {
    --nile-nav-tab-radius: var(--nile-radius-radius-lg, var(--ng-radius-sm));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --nile-nav-tab-active-color: var(--nile-colors-primary-600, var(--ng-colors-text-brand-secondary-700));
    --nile-nav-tab-bg-active: var(--nile-colors-primary-100, var(--ng-colors-bg-brand-primary-alt));
    --tab-gap: var(--nile-spacing-xs, var(--ng-spacing-xs));
    --nile-nav-tab-bg-hover: var(--nile-colors-primary-100, var(--ng-colors-bg-brand-primary-alt));
  }

  :host([variant='neutral-filled']) {
    --nile-nav-tab-radius: var(--nile-radius-radius-lg, var(--ng-radius-sm));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --nile-nav-tab-color: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
    --nile-nav-tab-bg-active: var(--nile-colors-dark-200, var(--ng-colors-bg-active));

    --tab-gap: var(--nile-spacing-xs, var(--ng-spacing-xs));
    --nile-nav-tab-bg-hover: var(--nile-colors-dark-200, var(--ng-colors-bg-active));
    --nile-nav-tab-text-color-hover: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
    --nile-nav-tab-active-color: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
  }

  :host([variant='toggle-button']) .nav-tab-group__nav-container {
    background: var(--nile-colors-dark-200, var(--ng-colors-bg-secondary-alt));
    border: var(--nile-border-width-1, var(--ng-border-width-1)) var(--nile-border-style-solid, var(--ng-border-style-solid)) var(--nile-colors-neutral-500, var(--ng-colors-border-secondary));
    border-radius: var(--nile-radius-radius-lg, var(--ng-radius-lg));
  }
  :host([variant='toggle-button'][placement='start']) .nav-tab-group__nav-container,
:host([variant='toggle-button'][placement='end']) .nav-tab-group__nav-container {
  padding-block: var(--nile-spacing-xs, var(--ng-spacing-xs));
  padding-inline: var(--nile-spacing-xs, var(--ng-spacing-xs));
}

  :host([variant='toggle-button']) {
    --nile-nav-tab-bg-active: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --nile-nav-tab-radius: var(--nile-radius-radius-md, var(--ng-radius-sm));
    --nile-nav-tab-transparent-border: var(--nile-border-width-1, var(--ng-border-width-1)) var(--nile-border-style-solid, var(--ng-border-style-solid)) transparent;
    --tab-gap: var(--nile-spacing-xs, var(--ng-spacing-xs));
    position: relative;
    box-sizing: border-box;
    --nile-nav-tab-active-box-shadow: var(--nile-box-shadow-3, var(--ng-shadow-xs));
    --nile-nav-tab-container-overflow: visible;
    --nile-nav-tab-bg-hover: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-text-color-hover: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
    --nile-nav-tab-active-color: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
  }

  :host([variant='toggle']) {
    --nile-nav-tab-radius: var(--nile-radius-radius-md, var(--ng-radius-sm));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --tab-gap: var(--nile-spacing-xxs, var(--ng-spacing-xxs));
    --nile-nav-tab-border: var(--nile-border-width-1, var(--ng-border-width-1)) var(--nile-border-style-solid, var(--ng-border-style-solid)) var(--nile-colors-neutral-500, var(--ng-colors-border-primary));
    --nile-nav-tab-active-box-shadow: var(--nile-box-shadow-3, var(--ng-shadow-xs));
    --nile-nav-transparent-border: var(--nile-border-width-1, var(--ng-border-width-1)) var(--nile-border-style-solid, var(--ng-border-style-solid)) transparent;
    --nile-nav-tab-bg-hover: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-text-color-hover: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
    --nile-nav-tab-active-color: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
    --nile-nav-tab-bg-active: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
  }

  :host([variant='toggle']) .nav-tab-group__nav-container {
    background: var(--nile-colors-dark-200, var(--ng-colors-bg-secondary-alt));
    border: none;
    border-radius: var(--nile-border-size-6, var(--ng-radius-sm));
    box-sizing: border-box;
    position: relative;
    overflow: visible;
  }

  :host([variant='toggle']) .nav-tab-group__toggle-frame {
    position: absolute;
    inset: 0;
    box-sizing: border-box;
    border: var(--nile-width-1px, var(--ng-border-width-1)) var(--nile-border-style-solid, var(--ng-border-style-solid))
      var(--nile-colors-neutral-500, var(--ng-colors-border-secondary));
    border-radius: inherit;
    pointer-events: none;
    z-index: 0;
  }

  :host([variant='toggle']) .nav-tab-group__nav {
    position: relative;
    z-index: 1;
  }

  /* --------------------------------------------------------------------------
   * Placement start / end: host token overrides
   * -------------------------------------------------------------------------- */

  :host([placement='start']) {
    --nile-nav-tab-bg-active: var(--nile-colors-primary-100, var(--ng-colors-bg-brand-primary-alt));
    --nile-nav-tab-radius: var(--nile-radius-sm, var(--ng-radius-sm)) var(--nile-radius-radius-none, var(--ng-radius-none)) var(--nile-radius-radius-none, var(--ng-radius-none)) var(--nile-radius-sm, var(--ng-radius-sm));
    --white-space: normal;
    --nile-nav-tab-height: auto; 
    --word-break: break-word;
    --overflow-wrap: break-word;
    --text-align: left;
  }

  :host([placement='start'][variant='underline']),
  :host([placement='start']:not([variant])) {
    --nile-nav-tab-bg-hover: var(--nile-colors-neutral-100, var(--ng-colors-bg-primary-hover));
    --nile-nav-tab-text-color-hover: var(--nile-colors-dark-500, var(--ng-colors-text-placeholder));
    --nile-nav-tab-padding: var(--nile-spacing-lg, var(--ng-spacing-3));
    --nile-nav-tab-active-color: var(--nile-colors-primary-600, var(--ng-colors-text-brand-secondary-700));
  }

  :host([variant='filled'][placement='start']) .nav-tab-group__tabs,
  :host([variant='neutral-filled'][placement='start']) .nav-tab-group__tabs,
  :host([variant='toggle'][placement='start']) .nav-tab-group__tabs,
  :host([variant='toggle-button'][placement='start']) .nav-tab-group__tabs {
    border-inline-end: none;
    --tab-gap: var(--nile-spacing-xs, var(--ng-spacing-xs));
    --nile-nav-tab-radius: var(--nile-radius-radius-lg, var(--ng-radius-sm));
  }

  :host([variant='neutral-filled'][placement='start']) {
    --nile-nav-tab-bg-active: var(--nile-colors-dark-200, var(--ng-colors-bg-active));
    --nile-nav-tab-active-color: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
  }

  :host([variant='toggle'][placement='start']) {
    --nile-nav-tab-bg-active: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-radius: var(--nile-radius-sm, var(--ng-radius-sm));
  }

  :host([variant='toggle-button'][placement='start']) {
    --nile-nav-tab-bg-active: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-radius: var(--nile-radius-sm, var(--ng-radius-sm));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --nile-nav-tab-bg-hover: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    padding-block: var(--nile-spacing-xs, var(--ng-spacing-xs));
    padding-inline: var(--nile-spacing-xs, var(--ng-spacing-xs));
  }

  :host([placement='end']) {
    --nile-nav-tab-bg-active: var(--nile-colors-primary-100, var(--ng-colors-bg-brand-primary-alt));
    --nile-nav-tab-radius: 0 var(--nile-radius-sm, var(--ng-radius-sm)) var(--nile-radius-sm, var(--ng-radius-sm)) 0;
    --white-space: normal;
    --nile-nav-tab-height: auto;
    --word-break: break-word;
    --overflow-wrap: break-word;
  }

  :host([placement='end'][variant='underline']),
  :host([placement='end']:not([variant])) {
    --nile-nav-tab-bg-hover: var(--nile-colors-neutral-100, var(--ng-colors-bg-primary-hover));
    --nile-nav-tab-text-color-hover: var(--nile-colors-dark-500, var(--ng-colors-text-placeholder));
    --nile-nav-tab-padding: var(--nile-spacing-lg, var(--ng-spacing-3));
    --white-space: normal;
    --nile-nav-tab-height: auto;
    --word-break: break-word;
    --overflow-wrap: break-word;
    --text-align: left;
  }

  :host([variant='filled'][placement='end']) .nav-tab-group__tabs,
  :host([variant='neutral-filled'][placement='end']) .nav-tab-group__tabs,
  :host([variant='toggle'][placement='end']) .nav-tab-group__tabs,
  :host([variant='toggle-button'][placement='end']) .nav-tab-group__tabs {
    border-inline-start: none;
    --tab-gap: var(--nile-spacing-xs, var(--ng-spacing-xs));
    --nile-nav-tab-radius: var(--nile-radius-radius-lg, var(--ng-radius-sm));
    
  }

  :host([variant='neutral-filled'][placement='end']) {
    --nile-nav-tab-bg-active: var(--nile-colors-dark-200, var(--ng-colors-bg-active));
    --nile-nav-tab-active-color: var(--nile-colors-dark-900, var(--ng-colors-text-secondary-700));
  }

  :host([variant='toggle'][placement='end']) {
    --nile-nav-tab-bg-active: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-radius: var(--nile-radius-sm, var(--ng-radius-sm));
  }

  :host([variant='toggle-button'][placement='end']) {
    --nile-nav-tab-bg-active: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
    --nile-nav-tab-radius: var(--nile-radius-sm, var(--ng-radius-sm));
    --nile-nav-tab-padding: var(--nile-spacing-md, var(--ng-spacing-md)) var(--nile-spacing-lg, var(--ng-spacing-lg));
    --nile-nav-tab-bg-hover: var(--nile-colors-white-base, var(--ng-colors-bg-primary-alt));
  }

  /* --------------------------------------------------------------------------
   * Active tab: slotted token overrides (pill / underline variants)
   * -------------------------------------------------------------------------- */

  :host(:is([variant='filled'], [variant='neutral-filled'], [variant='toggle']))
  slot[name='nav']::slotted(nile-nav-tab[active]) {
    --nile-nav-tab-active-box-shadow: none;
  }

  /* Pill variants: paint fill/border only on .nav-tab-container; keep link layer transparent so a
   * second white plane can’t extend past the border (grey stroke + white fringe). */
  :host(:is([variant='filled'], [variant='neutral-filled'], [variant='toggle'], [variant='toggle-button']))
  slot[name='nav']::slotted(nile-nav-tab) {
    --tab-active-background-color: transparent;
    --tab-hover-background-color: transparent;
    position: relative;
    z-index: 1;
  }

  /* --------------------------------------------------------------------------
   * Indicator placement: left (vertical start rail)
   * -------------------------------------------------------------------------- */

  :host([indicatorPlacement='left'][placement='start']) {
    --nile-nav-tab-bg-active: none;
    --nile-nav-tab-bg-hover: none;
    --tab-gap: 8px;
    --nile-nav-tab-active-color: var(--nile-colors-primary-600, var(--ng-colors-text-brand-secondary-700));
    --nile-nav-tab-text-color-hover: var(--nile-colors-primary-600, var(--ng-colors-text-brand-secondary-700));
  }

  :host([indicatorPlacement='left']) .nav-tab-group--start .nav-tab-group__indicator {
    top: 0;
    right: auto;
    left: calc(-1 * var(--track-width));
    border-right: none;
    border-left: solid var(--nile-border-width-2, var(--ng-border-width-2)) var(--indicator-color);
  }

  :host([indicatorPlacement='left']) .nav-tab-group--start .nav-tab-group__tabs {
    border-inline-end: none;
  }

  /* --------------------------------------------------------------------------
   * Hover indicator
   * -------------------------------------------------------------------------- */

  .nav-tab-group__hover-indicator {
    position: absolute;
    pointer-events: none;
    opacity: 0;
    transition: none;
    z-index: 2;
  }

  .nav-tab-group--top .nav-tab-group__hover-indicator {
    bottom: 0px;
    height: 0;
    border-bottom: 2px solid var(--indicator-color);
  }

  .nav-tab-group--bottom .nav-tab-group__hover-indicator {
    top: calc(-1 * var(--track-width));
    height: 0;
    border-top: solid var(--nile-border-width-2, var(--ng-border-width-2)) var(--indicator-color);
  }

  .nav-tab-group--start .nav-tab-group__hover-indicator {
    top: 0;
    right: calc(-1 * var(--track-width));
    width: 0;
    border-right: solid var(--nile-border-width-2, var(--ng-border-width-2)) var(--indicator-color);
  }

  .nav-tab-group--end .nav-tab-group__hover-indicator {
    top: 0;
    left: calc(-1 * var(--track-width));
    width: 0;
    border-left: solid var(--nile-border-width-2, var(--ng-border-width-2)) var(--indicator-color);
  }

  :host([indicatorPlacement='left']) .nav-tab-group--start .nav-tab-group__hover-indicator {
    top: 0;
    right: auto;
    left: calc(-1 * var(--track-width));
    border-right: none;
    border-left: solid var(--nile-border-width-2, var(--ng-border-width-2)) var(--indicator-color);
  }

  /* --------------------------------------------------------------------------
   * Reduced motion
   * -------------------------------------------------------------------------- */

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

  :host([placement='bottom'][variant='underline']),
:host([placement='bottom']:not([variant])) {
  --nile-nav-tab-padding: var(--nile-spacing-lg, var(--ng-spacing-3)) var(--nile-spacing-none, var(--ng-spacing-none)) var(--nile-spacing-none, var(--ng-spacing-none)) var(--nile-spacing-none, var(--ng-spacing-none));
}
`;

export default [styles];