.app-shell__body,
.app-shell__stage,
.shell-utility-panel { display: contents; }

.app-sidebar,
.app-mobile-nav,
.app-shell__menu-toggle,
.app-shell__profile-toggle,
.shell-context-header { display: none; }

.app-shell--v2 {
  min-height: 100vh;
  background: var(--color-bg-canvas);
}
.app-shell--v2 .header {
  min-height: 64px;
  padding: 0 var(--space-5);
  gap: var(--space-3);
  box-shadow: none;
}
.app-shell--v2 .header-learning-scope[hidden],
.app-shell--v2 .streak-badge[hidden] { display: none; }
.app-shell--v2 .logo { flex: 0 0 auto; }
.app-shell--v2 .current-user-indicator { margin-left: auto; box-shadow: none; }
.app-shell--v2 .app-shell__profile-toggle,
.app-shell--v2 .app-shell__menu-toggle {
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: 13px;
  font-weight: 650;
}
.app-shell--v2 .app-shell__profile-toggle { display: inline-flex; }
.app-shell--v2 .app-shell__body {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: calc(100vh - 64px);
}
.app-shell--v2 .app-sidebar {
  position: sticky;
  top: 64px;
  z-index: 30;
  display: flex;
  height: calc(100vh - 64px);
  flex-direction: column;
  padding: var(--space-5) var(--space-3);
  overflow-y: auto;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
}
.app-sidebar__heading {
  padding: 0 var(--space-3) var(--space-3);
  color: var(--color-text-secondary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.app-sidebar__navigation { display: grid; gap: var(--space-1); }
.app-nav-area,
.app-nav-item,
.app-nav-legacy summary {
  width: 100%;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-align: left;
  transition: color var(--motion-fast), background var(--motion-fast);
}
.app-nav-area:hover,
.app-nav-item:hover,
.app-nav-legacy summary:hover { color: var(--color-text); background: var(--color-bg-subtle); }
.app-nav-area[aria-current="page"],
.app-nav-item[aria-current="page"] { color: var(--color-accent-active); background: var(--color-accent-subtle); font-weight: 700; }
.app-nav-area__icon { width: 20px; flex: 0 0 20px; text-align: center; }
.app-nav-children { display: grid; gap: 2px; margin: 0 0 var(--space-2) var(--space-8); }
.app-nav-item { min-height: 36px; padding: var(--space-2); font-size: 13px; }
.app-nav-legacy { margin-top: var(--space-2); border-top: 1px solid var(--color-border); padding-top: var(--space-2); }
.app-nav-legacy summary { cursor: pointer; list-style: none; font-size: 13px; }
.app-nav-legacy summary::-webkit-details-marker { display: none; }
.app-nav-legacy__items { display: grid; gap: 2px; padding: var(--space-1) 0 0 var(--space-4); }

.app-shell--v2 .app-shell__stage { position: relative; display: block; min-width: 0; }
.app-shell--v2 .toolbar { display: none; }
.app-shell--v2 .shell-context-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-8) var(--space-4);
}
.app-shell--v2 .shell-context-header[hidden] { display: none; }
.shell-context-header__eyebrow { color: var(--color-text-secondary); font-size: 12px; font-weight: 650; }
.shell-context-header__title { margin: var(--space-1) 0 0; font-size: 28px; line-height: 36px; }
.shell-context-header__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); justify-content: flex-end; }
.app-shell--v2 #mainContent { min-width: 0; }
.app-shell--v2 .screen { padding: var(--space-4) var(--space-8) var(--space-8); }
.role-dashboard { max-width: 920px; }
.role-dashboard__description { max-width: 720px; margin: 0 0 var(--space-5); color: var(--color-text-secondary); line-height: 1.55; }
.role-onboarding { max-width: 920px; margin-top: var(--space-5); padding: var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.role-onboarding__header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.role-onboarding__header h3 { margin: var(--space-1) 0 0; }
.role-onboarding__progress { flex: 0 0 auto; padding: var(--space-2) var(--space-3); color: var(--color-accent-active); background: var(--color-accent-subtle); border-radius: 999px; font-size: 13px; font-weight: 700; }
.role-onboarding__steps { display: grid; gap: var(--space-2); }
.role-onboarding__step { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; align-items: center; gap: var(--space-3); min-height: 68px; padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.role-onboarding__step.is-complete { background: var(--color-bg-subtle); }
.role-onboarding__marker { display: grid; place-items: center; width: 32px; height: 32px; color: var(--color-accent-active); background: var(--color-accent-subtle); border-radius: 50%; font-weight: 800; }
.role-onboarding__step.is-complete .role-onboarding__marker { color: var(--color-success, #137a4a); background: color-mix(in srgb, var(--color-success, #137a4a) 12%, transparent); }
.role-onboarding__copy h4 { margin: 0 0 var(--space-1); font-size: 15px; }
.role-onboarding__copy p { margin: 0; color: var(--color-text-secondary); font-size: 13px; line-height: 1.45; }
.role-onboarding__note { margin: var(--space-3) 0 0; color: var(--color-text-secondary); font-size: 13px; }

.app-shell--v2 .shell-utility-panel {
  position: fixed;
  top: 58px;
  right: var(--space-4);
  z-index: 80;
  display: none;
  width: min(420px, calc(100vw - 32px));
  max-height: calc(100vh - 76px);
  padding: var(--space-3);
  overflow-y: auto;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
}
.app-shell--v2 .shell-utility-panel.is-open { display: block; }
.app-shell--v2 .auth-actions { display: grid; grid-template-columns: 1fr; gap: var(--space-2); padding: 0; }
.app-shell--v2 .auth-actions [data-shell-navigation-source="true"] { display: none; }
.app-shell--v2 .auth-actions .btn { width: 100%; min-height: 44px; justify-content: flex-start; border-radius: var(--radius-md); }

@media (max-width: 900px) {
  .app-shell--v2 .header { min-height: 56px; padding: 0 var(--space-3); }
  .app-shell--v2 .app-shell__menu-toggle { display: inline-flex; }
  .app-shell--v2 .header-learning-scope,
  .app-shell--v2 .streak-badge { display: none; }
  .app-shell--v2 .current-user-indicator { max-width: 220px; order: initial; flex: 0 1 auto; }
  .app-shell--v2 .current-user-indicator__caption,
  .app-shell--v2 .current-user-indicator__meta { display: none; }
  .app-shell--v2 .app-shell__profile-toggle { width: 44px; padding: 0; font-size: 0; }
  .app-shell--v2 .app-shell__profile-toggle::before { content: "•••"; font-size: 15px; }
  .app-shell--v2 .app-shell__body {
    position: relative;
    z-index: 0;
    display: block;
    min-height: calc(100vh - 56px);
  }
  .app-shell--v2 .app-sidebar {
    position: fixed;
    inset: 56px auto 0 0;
    width: min(320px, 88vw);
    height: auto;
    transform: translateX(-105%);
    transition: transform var(--motion-slow);
    box-shadow: var(--shadow-2);
  }
  .app-shell--v2 .app-sidebar.is-open { transform: translateX(0); }
  .app-shell--v2 .shell-context-header { padding: var(--space-5) var(--space-4) var(--space-3); }
  .app-shell--v2 .screen { padding: var(--space-3) var(--space-4) calc(88px + env(safe-area-inset-bottom)); }
  .app-shell--v2 .app-mobile-nav {
    position: fixed;
    inset: auto 0 0;
    z-index: 45;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: var(--space-1) var(--space-2) calc(var(--space-1) + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--color-surface) 96%, transparent);
    border-top: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
  }
  .app-mobile-nav__item {
    min-height: 52px;
    display: grid;
    place-items: center;
    gap: 1px;
    padding: var(--space-1);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-size: 11px;
    text-align: center;
  }
  .app-mobile-nav__item[aria-current="page"] { color: var(--color-accent-active); background: var(--color-accent-subtle); font-weight: 700; }
}

@media (max-width: 560px) {
  .app-shell--v2 .logo { font-size: 0; }
  .app-shell--v2 .logo::before { content: "📚"; font-size: 20px; }
  .app-shell--v2 .logo span { display: none; }
  .app-shell--v2 .current-user-indicator { min-width: 0; }
  .app-shell--v2 .current-user-indicator__copy strong { max-width: 126px; }
  .app-shell--v2 .shell-context-header { align-items: stretch; flex-direction: column; }
  .app-shell--v2 .shell-context-header__actions { justify-content: stretch; }
  .app-shell--v2 .shell-context-header__actions .ui-button { width: 100%; }
  .role-onboarding { padding: var(--space-4); }
  .role-onboarding__header { align-items: stretch; flex-direction: column; }
  .role-onboarding__progress { align-self: flex-start; }
  .role-onboarding__step { grid-template-columns: 36px minmax(0, 1fr); }
  .role-onboarding__step .ui-button { grid-column: 1 / -1; width: 100%; }
}