/**
 * @license
 * Scale https://github.com/telekom/scale
 *
 * Copyright (c) 2021 Egor Kirpichev and contributors, Deutsche Telekom AG
 *
 * 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 https://mozilla.org/MPL/2.0/.
 */

:host {
  --opacity-chevron: 1;
  --border-bottom-color: var(--telekom-color-ui-faint);
  --border-left-color-third-nesting: var(--telekom-color-ui-strong);
  --color-active: var(--telekom-color-text-and-icon-primary-pressed);
  --color-hover: var(--telekom-color-text-and-icon-primary-hovered);
  --color-primary: var(--telekom-color-text-and-icon-primary-standard);
  --background-color-before-active: var(--color-primary);
  --font-weight-bold: var(--telekom-typography-font-weight-bold);
  --box-shadow-focus: inset 0 0 0 var(--telekom-line-weight-highlight)
    var(--telekom-color-functional-focus-standard);
}
.sidebar-nav-collapsible {
  margin: 0;
  border-bottom-color: var(--border-bottom-color);
  border-bottom-style: solid;
  border-bottom-width: 0;
}

.sidebar-nav-collapsible--condensed {
  border-bottom-width: 1px;
}

.sidebar-nav-collapsible__wrapper {
  border-bottom-color: var(--border-bottom-color);
  border-bottom-style: solid;
  border-bottom-width: 1px;
}

.sidebar-nav-collapsible--condensed .sidebar-nav-collapsible__wrapper {
  border-bottom-width: 0;
}

.sidebar-nav-collapsible__button {
  color: currentColor;
  width: 100%;
  display: flex;
  box-sizing: border-box;
  text-align: left;
  align-items: center;
  padding-top: 1rem;
  padding-right: calc(0.5 * var(--spacing-indent));
  padding-bottom: 1rem;
  padding-left: var(--spacing-indent);
  justify-content: space-between;
  text-decoration: none;
  font-family: inherit;
  border-radius: var(--telekom-radius-small);
}

.sidebar-nav-collapsible__button:hover {
  color: var(--color-hover);
}

.sidebar-nav-collapsible__button:active {
  color: var(--color-active);
}

.sidebar-nav-collapsible__button:focus {
  outline: none;
  box-shadow: var(--box-shadow-focus);
}

.sidebar-nav-collapsible--active .sidebar-nav-collapsible__button {
  position: relative;
  color: var(--color-primary);
}

.sidebar-nav-collapsible--active .sidebar-nav-collapsible__button::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: var(--left-current-border, 0);
  width: 0; /* The transparent border makes the 2px */
  height: 100%;
  background-color: var(--color-primary);
  /* Accessibility: extra transparent line for Windows HCM */
  border-left: 2px solid transparent;
}

.sidebar-nav-collapsible--active:hover
  .sidebar-nav-collapsible__button::before {
  background-color: var(--color-hover);
}
.sidebar-nav-collapsible--active:active
  .sidebar-nav-collapsible__button::before {
  background-color: var(--color-active);
}

:host([nesting-level='1']) .sidebar-nav-collapsible__button,
.sidebar-nav-collapsible--bold .sidebar-nav-collapsible__button {
  font-weight: var(--font-weight-bold);
}

:host([nesting-level='2']) .sidebar-nav-collapsible__button {
  padding-left: calc(var(--spacing-indent) + 0.75rem);
}

.sidebar-nav-collapsible__icon {
  transition: opacity 150ms;
}

[aria-expanded='true'] .sidebar-nav-collapsible__icon {
  transform: rotate(0.5turn);
}

@media (hover: hover) {
  [aria-expanded='false'] .sidebar-nav-collapsible__icon {
    opacity: var(--opacity-chevron, 1);
  }

  .sidebar-nav-collapsible__button:hover .sidebar-nav-collapsible__icon {
    opacity: 1;
  }

  .sidebar-nav-collapsible__button:focus .sidebar-nav-collapsible__icon {
    opacity: 1;
  }
}

.sidebar-nav-collapsible__list {
  list-style: none;
  padding-left: 0;
  margin-top: 0;
  margin-bottom: 0;
  border-bottom-width: 1px; /* ? */
}

.sidebar-nav-collapsible--condensed .sidebar-nav-collapsible__list {
  margin-top: 1em;
  margin-left: var(--spacing-indent);
  margin-bottom: 2em;
}