@layer layout {
  .app {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    min-height: 100vh;
  }

  .sidebar {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: var(--space-5) var(--space-3);
    background: var(--color-panel);
    border-right: 1px solid var(--color-hairline);
  }

  .main {
    min-width: 0;
    padding: var(--space-8) var(--space-10) calc(var(--space-10) * 3);
  }

  .main__inner {
    max-width: var(--content-max);
  }

  .main__inner > .flash {
    margin: 0 0 var(--space-5);
  }

  /* Firm switcher */
  .firm-switcher {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-height: var(--touch-target);
    margin: 0 0 var(--space-5);
    padding: 0 var(--space-2);
    border-radius: var(--radius-md);
    text-decoration: none;
  }

  a.firm-switcher:hover {
    background: var(--color-hairline);
  }

  .firm-switcher__mark {
    display: grid;
    place-items: center;
    flex: none;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--color-ink);
    color: var(--color-accent);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-sm);
  }

  .firm-switcher__name {
    display: block;
    font-weight: 600;
    font-size: var(--text-md);
    line-height: 1.2;
  }

  .firm-switcher__hint {
    display: block;
    color: var(--color-muted);
    font-size: var(--text-xs);
    line-height: 1.2;
  }

  .firm-switcher__mark--quiet {
    background: var(--color-hairline);
    color: var(--color-ink);
  }

  /* The switcher opens a list of the user's other firms. */
  .firm-switcher-menu {
    position: relative;
    margin: 0 0 var(--space-5);
  }

  .firm-switcher-menu > summary {
    margin: 0;
    cursor: pointer;
    list-style: none;
  }

  .firm-switcher-menu > summary::-webkit-details-marker {
    display: none;
  }

  .firm-switcher-menu > summary::after {
    content: "";
    margin-left: auto;
    width: 6px;
    height: 6px;
    border-right: 1.5px solid var(--color-muted);
    border-bottom: 1.5px solid var(--color-muted);
    transform: rotate(45deg) translateY(-2px);
  }

  .firm-switcher-menu > summary:hover {
    background: var(--color-hairline);
  }

  .firm-switcher-menu__list {
    margin: var(--space-1) 0 0;
    padding: var(--space-1);
    list-style: none;
    background: var(--color-ground);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-md);
  }

  .firm-switcher-menu__item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    width: 100%;
    min-height: var(--touch-target);
    padding: 0 var(--space-2);
    border: 0;
    border-radius: var(--radius-sm);
    background: none;
    font: inherit;
    text-align: left;
    cursor: pointer;
  }

  .firm-switcher-menu__item:hover {
    background: var(--color-panel);
  }

  .sidebar__footer {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    margin-top: auto;
    padding: var(--space-5) var(--space-2) 0;
  }

  .sidebar__link {
    color: var(--color-ink);
    font-size: var(--text-sm);
    font-weight: 500;
  }

  .sidebar__user {
    max-width: 100%;
    overflow: hidden;
    color: var(--color-muted);
    font-size: var(--text-xs);
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Nav */
  .nav {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--touch-target);
    padding: 0 var(--space-3);
    border-radius: var(--radius-sm);
    color: var(--color-ink);
    text-decoration: none;
    font-size: var(--text-md);
    white-space: nowrap;
  }

  a.nav__link:hover {
    background: var(--color-hairline);
  }

  /* Outranks the hover rule, so the current item keeps its contrast under the pointer. */
  a.nav__link[aria-current="page"] {
    background: var(--color-ink);
    color: var(--color-on-ink);
    font-weight: 500;
  }

  .nav__link[aria-disabled="true"] {
    color: var(--color-muted);
  }

  .nav__badge {
    min-width: 22px;
    padding: 0 6px;
    border-radius: 6px;
    background: var(--color-accent);
    color: var(--color-on-accent);
    font-size: var(--text-xs);
    font-weight: 600;
    line-height: 20px;
    text-align: center;
  }

  /* Phones and narrow tablets: the sidebar stacks above the content and the
     nav becomes a horizontal strip that scrolls inside itself. */
  @media (max-width: 760px) {
    .app {
      grid-template-columns: minmax(0, 1fr);
    }

    .sidebar {
      position: static;
      height: auto;
      padding: var(--space-3) var(--space-4);
      border-right: 0;
      border-bottom: 1px solid var(--color-hairline);
    }

    .firm-switcher,
    .firm-switcher-menu {
      margin-bottom: var(--space-2);
    }

    .sidebar__footer {
      flex-direction: row;
      align-items: center;
      justify-content: space-between;
      padding: var(--space-2) 0 0;
    }

    .nav {
      flex-direction: row;
      gap: var(--space-1);
      overflow-x: auto;
      scrollbar-width: none;
      margin: 0 calc(var(--space-4) * -1);
      padding: 0 var(--space-4);
    }

    .nav__link {
      gap: var(--space-2);
    }

    .main {
      padding: var(--space-6) var(--space-4) calc(var(--space-10) * 3);
    }
  }
}