.bi {
    vertical-align: -.125em;
    pointer-events: none;
    fill: currentColor;
  }

  .dropdown-toggle { outline: 0; }

  .nav-flush .nav-link {
    border-radius: 0;
  }

  /* Sidebar toggle button — uses Bootstrap emphasis/body vars for dark+light */
  .btn-toggle {
    display: inline-flex;
    align-items: center;
    padding: .25rem .5rem;
    font-weight: 600;
    color: var(--bs-emphasis-color);
    background-color: transparent;
    border: 0;
  }
  .btn-toggle:hover,
  .btn-toggle:focus {
    color: var(--bs-emphasis-color);
    background-color: rgba(var(--bs-primary-rgb), 0.15);
  }

  .btn-toggle::before {
    width: 1.25em;
    line-height: 0;
    content: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='rgba%28255,255,255,.6%29' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M5 14l6-6-6-6'/%3e%3c/svg%3e");
    transition: transform .35s ease;
    transform-origin: .5em 50%;
  }

  /* Light theme: use dark-coloured chevron */
  [data-bs-theme="light"] .btn-toggle::before {
    content: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='rgba%280,0,0,.5%29' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M5 14l6-6-6-6'/%3e%3c/svg%3e");
  }

  .btn-toggle[aria-expanded="true"]::before {
    transform: rotate(90deg);
  }

  .btn-toggle-nav a {
    display: inline-flex;
    padding: .1875rem .5rem;
    margin-top: .125rem;
    margin-left: 1.25rem;
    text-decoration: none;
    color: var(--bs-body-color);
    border-radius: .25rem;
  }
  .btn-toggle-nav a:hover,
  .btn-toggle-nav a:focus {
    background-color: rgba(var(--bs-primary-rgb), 0.15);
    color: var(--bs-emphasis-color);
  }

  /* Active sidebar link */
  .btn-toggle-nav a.active {
    background-color: rgba(var(--bs-primary-rgb), 0.25);
    color: var(--bs-emphasis-color);
    font-weight: 600;
  }

  .scrollarea { overflow-y: auto; }
  .fw-semibold { font-weight: 600; }
  .lh-tight { line-height: 1.25; }