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

  .sidebar {
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    height: 100vh;
    padding: var(--space-3) var(--space-2);
    background: var(--color-sidebar);
    border-right: 1px solid var(--color-border);
  }

  .sidebar__brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    font-weight: 600;
    min-width: 0;
  }

  .sidebar__brand span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

  .brand-mark {
    display: grid;
    place-items: center;
    flex: none;
    width: 22px;
    height: 22px;
    border-radius: var(--radius-sm);
    background: var(--color-accent);
    color: #fff;
    font-size: var(--text-xs);
    font-weight: 700;
    letter-spacing: 0.02em;
  }

  .sidebar__nav { display: flex; flex-direction: column; gap: 1px; }

  .nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 28px;
    padding: 0 var(--space-2);
    border-radius: var(--radius);
    color: var(--color-text-secondary);
    font-weight: 500;
  }

  .nav-link .icon { color: var(--color-text-tertiary); }
  .nav-link:hover { background: var(--color-hover); color: var(--color-text); text-decoration: none; }
  .nav-link.is-active { background: var(--color-selected); color: var(--color-text); }
  .nav-link.is-active .icon { color: var(--color-text); }

  .sidebar__footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
  }

  .sidebar__user {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    min-width: 0;
  }

  .sidebar__user div { display: flex; flex-direction: column; min-width: 0; line-height: 1.3; }
  .sidebar__user strong { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

  .avatar {
    display: grid;
    place-items: center;
    flex: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    font-size: var(--text-xs);
    font-weight: 600;
  }

  .main { min-width: 0; padding: var(--space-5) var(--space-6) var(--space-7); }
  .main > * { max-width: var(--content-width); margin-inline: auto; }
  .main > * + * { margin-top: var(--space-5); }

  /* Page header: breadcrumbs, title, meta line, actions on the right. */
  .page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
  }

  .page-header__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-1);
    color: var(--color-text-secondary);
  }

  .page-header__actions { display: flex; gap: var(--space-2); }

  .breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-bottom: var(--space-1);
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
  }

  .breadcrumbs a { color: var(--color-text-secondary); }
  .breadcrumbs .icon { width: 12px; height: 12px; }

  /* Project setup: section menu on the left, sections on the right. */
  .setup { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: var(--space-5); align-items: start; }
  .setup__nav { position: sticky; top: var(--space-5); display: flex; flex-direction: column; gap: 1px; }
  .setup__sections { display: flex; flex-direction: column; gap: var(--space-4); }
  .setup-section { scroll-margin-top: var(--space-5); }

  /* Sign-in, password and 2FA pages. */
  .auth {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: var(--space-5) var(--space-4);
  }

  .auth__card {
    width: 100%;
    max-width: 380px;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
  }

  .auth__brand { display: flex; align-items: center; gap: var(--space-2); font-weight: 600; }
  .auth__card form { display: flex; flex-direction: column; gap: var(--space-3); }
  .auth__card input[type="submit"] { width: 100%; }
  .auth__links { font-size: var(--text-sm); text-align: center; }

  @media (max-width: 760px) {
    .app-shell { grid-template-columns: minmax(0, 1fr); }

    .sidebar {
      position: static;
      flex-direction: row;
      align-items: center;
      height: auto;
      padding: var(--space-2) var(--space-3);
      border-right: 0;
      border-bottom: 1px solid var(--color-border);
    }

    .sidebar__brand span:last-child, .sidebar__user { display: none; }
    .sidebar__nav { flex-direction: row; }
    .sidebar__footer { margin: 0 0 0 auto; padding: 0; border: 0; }

    .main { padding: var(--space-4) var(--space-4) var(--space-6); }

    /* Rows wrap so long paths keep a full line; kind and status move below. */
    .list-row__main:has(.list-row__stack) { flex-wrap: wrap; row-gap: 2px; }
    .list-row__stack { flex: 1 1 calc(100% - 24px); }
    .list-row__stack ~ .list-row__meta { margin-left: 0; }

    .setup { grid-template-columns: minmax(0, 1fr); }
    .setup__nav { position: static; flex-direction: row; overflow-x: auto; padding-bottom: var(--space-1); }
    .setup__nav .nav-link { flex: none; }
  }
}