@layer components {
  .app-layout {
    display: flex;
    min-height: 100dvh;
  }

  .app-layout--auth {
    flex-direction: row;
  }

  @media (max-width: 768px) {
    .app-layout--auth {
      flex-direction: column;
    }
  }

  .locale-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-small);
  }

  .locale-toggle__short {
    display: none;
  }

  .locale-toggle__link {
    color: var(--color-ink-medium);
    text-decoration: none;
  }

  .locale-toggle__link:hover {
    color: var(--color-primary);
    text-decoration: underline;
  }

  .locale-toggle__current {
    font-weight: 600;
    color: var(--color-ink);
  }

  .locale-toggle-wrap--auth {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    z-index: 10;
  }

  .skip-link {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    z-index: calc(var(--z-nav) + 10);
    padding: 0.7rem 0.95rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-canvas-raised);
    color: var(--color-ink);
    box-shadow: var(--shadow-card);
    transform: translateY(-140%);
    transition: transform 0.15s ease;
  }

  .skip-link:focus-visible {
    transform: translateY(0);
  }

  /* Main content area */
  .app-body {
    flex: 1;
    min-width: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.22) 0%, transparent 14rem);
  }

  .app-main {
    flex: 1;
    min-width: 0;
    padding: var(--main-padding);
    max-width: none;
    width: 100%;
    transition: opacity 0.18s ease;
  }

  .app-main:not(.app-main--full) {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
  }

  .app-main:not(.app-main--full) > * {
    width: min(100%, var(--main-max-width));
  }

  .app-main--full {
    max-width: none;
    padding: 0;
  }

  .app-main--padded {
    padding: var(--main-padding);
  }

  .page-shell {
    width: min(100%, var(--main-max-width));
    display: flex;
    flex-direction: column;
    gap: clamp(var(--space-4), 0.9rem + 0.8vw, var(--space-8));
  }

  .page-shell--dense {
    gap: var(--space-4);
  }

  .page-shell--form {
    width: min(100%, 64rem);
  }

  .page-shell--wide {
    width: min(100%, 96rem);
  }

  .auth-card {
    box-shadow: var(--shadow-elevated);
  }

  .mobile-nav {
    display: none;
  }

  .toast-stack {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    width: min(24rem, calc(100vw - 2rem));
    z-index: 90;
    pointer-events: none;
  }

  .toast {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-canvas-raised);
    box-shadow: var(--shadow-elevated);
    color: var(--color-ink);
    font-size: var(--text-small);
    backdrop-filter: blur(14px);
    pointer-events: auto;
    transition: opacity 0.18s ease, transform 0.18s ease;
  }

  .toast--notice {
    border-color: var(--color-positive-border);
    background: var(--color-positive-light);
  }

  .toast--alert {
    border-color: var(--color-negative-border);
    background: var(--color-negative-light);
  }

  .toast.is-closing {
    opacity: 0;
    transform: translateY(-8px);
  }

  .toast__body {
    flex: 1;
    line-height: 1.5;
  }

  .toast__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.85);
    color: var(--color-ink-medium);
    line-height: 1;
    cursor: pointer;
  }

  /* Responsive: collapse sidebar on small screens */
  @media (max-width: 768px) {
    .app-body {
      padding-bottom: 6.25rem;
      overflow-x: clip;
    }

    .app-main {
      overflow-x: clip;
    }

    .mobile-nav {
      position: fixed;
      left: 0;
      right: 0;
      bottom: 0;
      width: 100vw;
      max-width: 100vw;
      box-sizing: border-box;
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      align-items: stretch;
      gap: 0.35rem 0.25rem;
      padding: 0.5rem 0.5rem calc(0.65rem + env(safe-area-inset-bottom));
      border-top: 1px solid var(--color-border);
      background: rgba(255, 253, 250, 0.98);
      backdrop-filter: blur(14px);
      z-index: calc(var(--z-nav) + 1);
    }

    .mobile-nav__link,
    .mobile-nav__button,
    .mobile-nav__summary {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.25rem;
      min-width: 0;
      min-height: 3.5rem;
      padding: 0.35rem 0.3rem;
      border: none;
      border-radius: var(--radius-md);
      color: var(--color-ink-medium);
      background: transparent;
      font: inherit;
      font-size: var(--text-xs);
      font-weight: 600;
      text-align: center;
      cursor: pointer;
    }

    .mobile-nav__summary {
      list-style: none;
    }

    .mobile-nav__summary::-webkit-details-marker {
      display: none;
    }

    .mobile-nav__link span,
    .mobile-nav__button span,
    .mobile-nav__summary span {
      max-width: 100%;
      line-height: 1.15;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .mobile-nav__link svg,
    .mobile-nav__button svg,
    .mobile-nav__summary svg {
      width: 1rem;
      height: 1rem;
    }

    .mobile-nav__link.active,
    .mobile-nav__button.active,
    .mobile-nav__more[open] > .mobile-nav__summary {
      background: var(--color-primary-light);
      color: var(--color-link-hover);
    }

    .mobile-nav__sheet {
      position: fixed;
      left: 0.75rem;
      right: 0.75rem;
      bottom: calc(5.4rem + env(safe-area-inset-bottom));
      display: flex;
      flex-direction: column;
      gap: var(--space-4);
      width: min(100%, 26rem);
      margin-inline: auto;
      padding: var(--space-4);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      background: rgba(255, 253, 250, 0.98);
      box-shadow: var(--shadow-elevated);
      backdrop-filter: blur(14px);
    }

    .mobile-nav__sheet-links {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: var(--space-2);
    }

    .mobile-nav__sheet-link,
    .mobile-nav__sheet-signout {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: var(--space-2);
      min-height: 2.75rem;
      padding: 0.7rem 0.8rem;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: var(--color-canvas-raised);
      color: var(--color-ink);
      font: inherit;
      font-size: var(--text-small);
      font-weight: 500;
      text-decoration: none;
      text-align: center;
      box-shadow: var(--shadow-card);
    }

    .mobile-nav__sheet-link svg {
      width: 1rem;
      height: 1rem;
      flex-shrink: 0;
    }

    .mobile-nav__sheet-link.active {
      border-color: var(--color-trigger-border);
      background: var(--color-primary-light);
      color: var(--color-link-hover);
    }

    .mobile-nav__sheet-footer {
      display: flex;
      flex-direction: column;
      gap: var(--space-3);
      padding-top: var(--space-3);
      border-top: 1px solid var(--color-border);
    }

    .mobile-nav__sheet-locale {
      display: flex;
      justify-content: center;
    }

    .mobile-nav__sheet-locale .locale-toggle {
      flex-wrap: wrap;
      justify-content: center;
    }

    .mobile-nav__sheet-signout {
      width: 100%;
      justify-content: center;
    }

    .mobile-nav__sheet-link:focus-visible,
    .mobile-nav__sheet-signout:focus-visible {
      outline-offset: 3px;
    }

    .mobile-nav__sheet-signout:hover {
      border-color: var(--color-negative);
      color: var(--color-negative);
    }

    .mobile-nav__sheet-footer form {
      margin: 0;
    }

    .mobile-nav__sheet-signout svg {
      width: 1rem;
      height: 1rem;
    }
  }

  @media (max-width: 420px) {
    .mobile-nav__sheet-links {
      grid-template-columns: 1fr;
    }
  }
}