#main-content-area {
  padding-bottom: 5.5rem;
}

/* ==========================================================================
   src/styles/layout.css
   Fixed Header, Fixed Desktop Sidebar, Main Workspace Container, Zen Mode,
   and Initial Application Entrance / View Switch Motion
   ========================================================================== */

@keyframes appInitialReveal {
  0% {
    opacity: 0;
    transform: translateY(6px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes viewSectionEnter {
  0% {
    opacity: 0;
    transform: translateY(8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

body.app-initialized #top-header {
  animation: appInitialReveal var(--motion-page) var(--ease-out-smooth);
}

.view-section:not(.hidden) {
  animation: viewSectionEnter var(--motion-page) var(--ease-out-smooth);
}

.view-section:not(.hidden).theme-morph-active {
  animation: readingModeCanvasMorph var(--motion-theme) var(--ease-theme);
}

body.zen-mode {
  padding-top: 0 !important;
}

body.zen-mode #top-header,
body.zen-mode #desktop-sidebar,
body.zen-mode #mobile-bottom-nav,
body.zen-mode #reader-subtoolbar {
  display: none !important;
}

body.zen-mode #zen-exit-btn {
  display: flex !important;
  animation: viewSectionEnter var(--motion-normal) var(--ease-out-smooth);
}

/* Smooth Sidebar Drawer & Mobile Backdrop Transitions */
#desktop-sidebar {
  transition: transform var(--motion-drawer) var(--ease-out-smooth),
              background-color var(--motion-theme) var(--ease-theme),
              border-color var(--motion-theme) var(--ease-theme),
              color var(--motion-theme) var(--ease-theme);
}

#sidebar-backdrop {
  transition: opacity var(--motion-drawer) var(--ease-in-out-soft),
              visibility var(--motion-drawer) var(--ease-in-out-soft);
  opacity: 1;
  visibility: visible;
}

#sidebar-backdrop.hidden {
  display: block !important;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Fixed Sidebar & Main Workspace Synchronization on Desktop (RTL) */
@media (min-width: 1024px) {
  #desktop-sidebar {
    position: fixed !important;
    top: 4rem !important;
    right: 0 !important;
    bottom: 0 !important;
    height: calc(100vh - 4rem) !important;
    width: 20rem !important;
    z-index: 30 !important;
    transform: translateX(0) !important;
  }
  body.sidebar-closed-desktop #desktop-sidebar {
    transform: translateX(100%) !important;
  }
  #main-content-area {
    margin-right: 20rem;
    transition: margin-right var(--motion-drawer) var(--ease-out-smooth),
                background-color var(--motion-theme) var(--ease-theme),
                color var(--motion-theme) var(--ease-theme);
  }
  body.sidebar-closed-desktop #main-content-area,
  body.zen-mode #main-content-area {
    margin-right: 0 !important;
  }
}

/* Core Fixed Header & Mobile Bottom Nav Layout Rules */
#top-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: 4rem;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#mobile-bottom-nav {
  position: fixed;
  bottom: 0;
  right: 0;
  left: 0;
  height: 4rem;
  z-index: 30;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

@media (max-width: 1023px) {
  #desktop-sidebar {
    position: fixed;
    top: 4rem;
    right: 0;
    bottom: 0;
    width: 20rem;
    max-width: 85vw;
    z-index: 30;
  }
  #desktop-sidebar.translate-x-full {
    transform: translateX(100%) !important;
  }
}


/* Mobile drawer: sits above the bottom navigation and owns the only active scroll area. */
@media (max-width: 1023px) {
  html.sidebar-open-mobile,
  body.sidebar-open-mobile,
  html.import-modal-open,
  body.import-modal-open {
    overflow: hidden !important;
    overscroll-behavior: none !important;
  }
  body.sidebar-open-mobile #desktop-sidebar {
    top: 4rem !important;
    bottom: 0 !important;
    height: calc(100dvh - 4rem) !important;
    z-index: 60 !important;
    overscroll-behavior: contain;
  }
  body.sidebar-open-mobile #sidebar-backdrop {
    z-index: 50 !important;
    bottom: 0 !important;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
  }
  #desktop-sidebar { min-height: 0; }
  #desktop-sidebar > #sidebar-books-list {
    min-height: 0;
    overflow-y: auto !important;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
  }
  body.sidebar-open-mobile #main-content-area,
  body.sidebar-open-mobile #mobile-bottom-nav {
    pointer-events: none;
    user-select: none;
  }
}

/* The JSON administration modal is deliberately non-scrollable. */
#modal-import { overflow: hidden !important; overscroll-behavior: none !important; }
#modal-import > .import-modal-panel {
  max-height: calc(100dvh - 2rem) !important;
  overflow: hidden !important;
  overscroll-behavior: none !important;
}
#modal-import .custom-dropdown-menu { overscroll-behavior: contain; }

/* Live settings preview mirrors typography, layout and accessibility settings. */
.settings-preview-reading {
  width: 100%;
  margin-inline: auto;
  transition: max-width var(--motion-normal) var(--ease-out-smooth), color var(--motion-theme) var(--ease-theme);
}
.settings-preview-reading.mode-block .settings-preview-verse {
  display: block;
  margin-bottom: var(--reading-para-gap);
  padding: 2px 4px;
}
.settings-preview-reading.mode-inline .settings-preview-verse { display: inline; margin: 0; padding: 0; }
.settings-preview-reading.mode-inline .settings-preview-verse + .settings-preview-verse::before { content: " "; }
.settings-preview-card[data-preview-contrast="high"] { border-width: 2px; border-color: var(--text-primary); }
.settings-preview-card[data-preview-motion="reduced"] * { animation: none !important; transition: none !important; }
.settings-preview-meta span { border: 1px solid var(--border-color); border-radius: 999px; padding: 3px 7px; }
@media (max-width: 639px) {
  #modal-import { padding: .5rem !important; }
  #modal-import > .import-modal-panel { padding: .85rem !important; gap: .65rem !important; max-height: calc(100dvh - 1rem) !important; }
  #modal-import .text-xs.leading-relaxed { font-size: 10px; line-height: 1.45; }
  #modal-import textarea { max-height: 5.5rem; }
}

html.import-modal-open, body.import-modal-open { overflow: hidden !important; overscroll-behavior: none !important; }