/* ============================================
   ReadVenture Layout
   Page containers, drawers, overlays, backdrops
   ============================================ */

/* ── Main Page Container ── */
#app {
  width: 100%;
  max-width: 500px;
  height: 100%;
  position: relative;
  overflow: hidden;
  background: var(--bg-deep);
}

/* ── Top Bar ── */
#topBar {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px 10px 16px;
  background: linear-gradient(180deg, var(--bg-dark) 60%, transparent);
}

#topBarRow1 {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Pages (stacked view) ── */
#homePage, #storyPage, #chatPage, #scanPage,
#onboardingPage, #libraryPage, #profilePage,
#parentPage, #friendsPage, #questsPage,
#discoverPage, #dailyPage {
  display: none;
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overflow-x: hidden;
}
#homePage.active, #storyPage.active, #chatPage.active, #scanPage.active,
#onboardingPage.active, #libraryPage.active, #profilePage.active,
#parentPage.active, #friendsPage.active, #questsPage.active,
#discoverPage.active, #dailyPage.active {
  display: block;
}

/* ── Drawers (bottom sheet) ── */
#chatDrawer, #memoryDrawer, #libraryDrawer,
#bgDrawer, #dailyDrawer, #landingDrawer, #shareDrawer {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  z-index: 200;
  background: var(--grad-drawer);
  border-radius: var(--radius-6xl) var(--radius-6xl) 0 0;
  box-shadow: var(--shadow-drawer);
  transform: translateY(100%);
  transition: transform var(--anim-drawer) var(--ease-smooth);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
}
#chatDrawer.open, #memoryDrawer.open, #libraryDrawer.open,
#bgDrawer.open, #dailyDrawer.open, #landingDrawer.open, #shareDrawer.open {
  transform: translateY(0);
}

.drawer-handle {
  width: 40px;
  height: 5px;
  background: var(--glass-30);
  border-radius: var(--space-xs);
  margin: 10px auto;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px var(--space-xl) 8px var(--space-xl);
}
.drawer-header h2 {
  margin: 0;
  font-size: var(--text-19);
  color: var(--text-primary);
}
.drawer-body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0 var(--space-xl) var(--space-2xl) var(--space-xl);
}

/* ── Overlays (fullscreen modal) ── */
.overlay-backdrop {
  position: absolute;
  inset: 0;
  z-index: 300;
  background: var(--black-65);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--anim-overlay) var(--ease-smooth);
}
.overlay-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}

.overlay {
  position: absolute;
  inset: 0;
  z-index: 301;
  background: var(--grad-overlay);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateY(100%);
  transition: transform var(--anim-overlay) var(--ease-smooth);
  display: flex;
  flex-direction: column;
}
.overlay.show {
  transform: translateY(0);
}

.overlay-close {
  position: absolute;
  top: 12px; right: 14px;
  z-index: 5;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--glass-10);
  color: var(--text-primary);
  font-size: var(--text-22);
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
}

/* ── Notification Toast ── */
.notification-toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--card-dark);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: var(--text-14);
  font-weight: 600;
  box-shadow: var(--shadow-xl);
  z-index: 9999;
  opacity: 0;
  transition: transform var(--anim-drawer) var(--ease-smooth), opacity var(--anim-normal) var(--ease-smooth);
  white-space: nowrap;
  max-width: 90vw;
  overflow: hidden;
  text-overflow: ellipsis;
  border: 1px solid var(--border-15);
}
.notification-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ── FAB (Floating Action Buttons) ── */
.fab-group {
  position: fixed;
  bottom: 24px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 150;
}

.bottom-actions-bar {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  justify-content: center;
  z-index: 10;
}