/* Mobile sidebar sheet + header menu toggle */
html[data-shell="light"] .sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-canvas);
  cursor: pointer;
  color: var(--text-primary);
}

html[data-shell="light"] .sidebar-toggle svg {
  width: 20px;
  height: 20px;
}

html[data-shell="light"] .sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  z-index: 150;
}

html[data-shell="light"] body.sidebar-open .sidebar-backdrop {
  display: block;
}

@media (max-width: 767px) {
  html[data-shell="light"] .sidebar-toggle {
    display: inline-flex;
  }

  html[data-shell="light"] .layout {
    grid-template-columns: 1fr;
  }

  html[data-shell="light"] .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(280px, 88vw);
    z-index: 200;
    transform: translateX(-100%);
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-lg);
  }

  html[data-shell="light"] body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  html[data-shell="light"] .app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-canvas);
    border-bottom: 1px solid var(--border-default);
    padding: var(--space-2) var(--space-4);
    margin: calc(-1 * var(--space-4));
    margin-bottom: var(--space-4);
  }
}