/* App shell: sidebar 248 / rail 64 / mobile bottom nav (§4, §9). */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100dvh;
}
.app__main { min-width: 0; display: flex; flex-direction: column; }
.main { flex: 1; min-width: 0; }
.main:focus { outline: none; }

/* ------------------------------------------------------------------ sidebar */
.sidebar {
  position: sticky;
  top: 0;
  z-index: var(--z-sidebar);
  height: 100vh;
  height: 100dvh;
  width: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-3) var(--space-3);
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  overflow-x: hidden;
}
.sidebar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 40px;
  padding: 0 var(--space-1) 0 var(--space-2);
  margin-bottom: var(--space-3);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  flex: 1;
  min-width: 0;
}
.brand:hover { text-decoration: none; }
.brand__mark { width: 24px; height: 24px; flex: none; }
.sidebar__collapse { margin-left: auto; }

.nav-group { display: flex; flex-direction: column; gap: 2px; }
.nav-group + .nav-group { margin-top: var(--space-4); }
.nav-group__label { padding: 0 var(--space-3); margin-bottom: var(--space-1); }

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 36px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--fs-body);
  font-weight: 500;
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-standard), color var(--dur-fast) var(--ease-standard);
}
.nav-item .icon { width: 18px; height: 18px; }
.nav-item:hover { background: var(--color-surface-2); color: var(--color-text); text-decoration: none; }
.nav-item[aria-current="page"] {
  background: var(--color-primary-soft);
  color: var(--color-text);
}
.nav-item[aria-current="page"] .icon { color: var(--color-primary-fg); }
.nav-item[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}
.nav-item__label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.nav-item__badge { margin-left: auto; }
@media (pointer: coarse) { .nav-item { min-height: 44px; } }

.sidebar__channel { padding: 0 var(--space-1); margin-bottom: var(--space-1); }
.sidebar__empty-channel {
  margin: 0 var(--space-1);
  padding: var(--space-3);
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

.sidebar__footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-1);
  align-items: center;
}
.sidebar__footer .nav-item { flex: 1; min-height: 36px; font-size: var(--fs-label); }

/* Collapsed rail: user toggle on ≥1280 (cookie), default on 768–1279. */
@media (min-width: 1280px) {
  .app-body[data-sidebar="collapsed"] .app { grid-template-columns: var(--sidebar-w-collapsed) minmax(0, 1fr); }
  .app-body[data-sidebar="collapsed"] .sidebar { width: var(--sidebar-w-collapsed); padding-left: var(--space-2); padding-right: var(--space-2); }
  .app-body[data-sidebar="collapsed"] .sidebar :is(.nav-item__label, .nav-group__label, .brand__name, .switcher__text, .switcher__meter, .switcher__chevron, .sidebar__empty-channel span) {
    position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap;
  }
  .app-body[data-sidebar="collapsed"] .sidebar .nav-item { justify-content: center; padding: 0; }
  .app-body[data-sidebar="collapsed"] .sidebar .nav-item[aria-current="page"]::before { left: 0; }
  .app-body[data-sidebar="collapsed"] .sidebar .nav-item__badge { position: absolute; top: 5px; right: 9px; min-width: 8px; width: 8px; height: 8px; padding: 0; font-size: 0; }
  .app-body[data-sidebar="collapsed"] .sidebar__brand { flex-direction: column; padding: 0; gap: var(--space-2); }
  .app-body[data-sidebar="collapsed"] .sidebar__collapse { margin-left: 0; }
  .app-body[data-sidebar="collapsed"] .switcher { justify-content: center; padding: var(--space-1); }
  .app-body[data-sidebar="collapsed"] .sidebar__footer { flex-direction: column; }
  .app-body[data-sidebar="collapsed"] .sidebar__footer .nav-item { width: 100%; }
  .app-body[data-sidebar="collapsed"] .sidebar__empty-channel { padding: var(--space-1); border-width: 1px; justify-items: center; }
}

/* 768–1279: rail by default; expanding overlays the content. */
@media (min-width: 768px) and (max-width: 1279px) {
  .app { grid-template-columns: var(--sidebar-w-collapsed) minmax(0, 1fr); }
  .app-body:not([data-sidebar="expanded"]) .sidebar { width: var(--sidebar-w-collapsed); padding-left: var(--space-2); padding-right: var(--space-2); }
  .app-body:not([data-sidebar="expanded"]) .sidebar :is(.nav-item__label, .nav-group__label, .brand__name, .switcher__text, .switcher__meter, .switcher__chevron, .sidebar__empty-channel span) {
    position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap;
  }
  .app-body:not([data-sidebar="expanded"]) .sidebar .nav-item { justify-content: center; padding: 0; }
  .app-body:not([data-sidebar="expanded"]) .sidebar .nav-item[aria-current="page"]::before { left: 0; }
  .app-body:not([data-sidebar="expanded"]) .sidebar .nav-item__badge { position: absolute; top: 5px; right: 9px; min-width: 8px; width: 8px; height: 8px; padding: 0; font-size: 0; }
  .app-body:not([data-sidebar="expanded"]) .sidebar__brand { flex-direction: column; padding: 0; gap: var(--space-2); }
  .app-body:not([data-sidebar="expanded"]) .sidebar__collapse { margin-left: 0; }
  .app-body:not([data-sidebar="expanded"]) .switcher { justify-content: center; padding: var(--space-1); }
  .app-body:not([data-sidebar="expanded"]) .sidebar__footer { flex-direction: column; }
  .app-body:not([data-sidebar="expanded"]) .sidebar__footer .nav-item { width: 100%; }
  .app-body:not([data-sidebar="expanded"]) .sidebar__empty-channel { padding: var(--space-1); border-width: 1px; justify-items: center; }
  .app-body[data-sidebar="expanded"] .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-w);
    box-shadow: var(--shadow-3);
  }
}

/* ------------------------------------------------------------------ topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-topbar);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--topbar-h);
  padding: 0 var(--gutter);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.topbar__start { display: flex; align-items: center; gap: var(--space-2); min-width: 0; flex: 1; }
.topbar__actions { display: flex; align-items: center; gap: var(--space-2); flex: none; }
.topbar .topbar__menu, .topbar .topbar__back { display: none; }
.sidebar .sidebar__close { display: none; }

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
  font-size: var(--fs-label);
  line-height: var(--lh-label);
}
.breadcrumb { min-width: 0; overflow: hidden; }
.breadcrumb li { display: flex; align-items: center; gap: var(--space-1); min-width: 0; }
.breadcrumb li > .icon { color: var(--color-text-subtle); width: 14px; height: 14px; }
.breadcrumb a, .breadcrumb [aria-current] {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1-5);
  max-width: 24ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text-muted);
}
.breadcrumb a:hover { color: var(--color-text); }
.breadcrumb [aria-current] { color: var(--color-text); font-weight: 500; }

/* ------------------------------------------------------------------ page */
.page {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-8) var(--gutter) var(--space-16);
}
.page--narrow { max-width: 960px; }
.page--full { max-width: none; }

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.page-header__main { min-width: 0; display: grid; gap: var(--space-1); }
.page-header__title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
}
.page-header__title h1 { overflow-wrap: anywhere; }
.page-header__meta {
  color: var(--color-text-muted);
  font-size: var(--fs-body);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
}
.page-header__meta .sep { color: var(--color-text-subtle); }
.page-header__actions { display: flex; align-items: center; gap: var(--space-2); flex: none; flex-wrap: wrap; justify-content: flex-end; }

.section { margin-top: var(--space-8); }
.section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.section__header h2 { display: flex; align-items: center; gap: var(--space-2); }

/* Sub-navigation layout (settings, report TOC, bible TOC). */
.with-subnav {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
}
.subnav {
  position: sticky;
  top: calc(var(--topbar-h) + var(--space-6));
  display: grid;
  gap: 2px;
}
.subnav__title { padding: 0 var(--space-3); margin-bottom: var(--space-2); }
.subnav a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 36px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-weight: 500;
}
.subnav a:hover { background: var(--color-surface-2); color: var(--color-text); text-decoration: none; }
.subnav a[aria-current="page"], .subnav a[aria-current="true"] { background: var(--color-primary-soft); color: var(--color-text); }
.subnav a[aria-current] .icon { color: var(--color-primary-fg); }
.subnav-select { display: none; }

@media (max-width: 1023px) {
  .with-subnav { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .subnav {
    position: sticky;
    top: var(--topbar-h);
    z-index: var(--z-raised);
    display: flex;
    gap: var(--space-2);
    overflow-x: auto;
    padding: var(--space-2) 0;
    margin: 0 calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
    background: var(--color-bg);
    scrollbar-width: none;
  }
  .subnav__title { display: none; }
  .subnav a { flex: none; border: 1px solid var(--color-border); border-radius: var(--radius-full); min-height: 32px; }
}

/* ------------------------------------------------------------------ bottom nav (mobile) */
.bottom-nav { display: none; }
.nav-scrim { display: none; }

@media (max-width: 767px) {
  .app, .app-body[data-sidebar="collapsed"] .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: min(300px, 86vw);
    transform: translateX(-105%);
    transition: transform var(--dur-slow) var(--ease-standard);
    box-shadow: var(--shadow-3);
    background: var(--color-surface);
    z-index: var(--z-drawer);
    visibility: hidden;
  }
  .sidebar__collapse { display: none; }
  .sidebar .sidebar__close { display: inline-flex; margin-left: auto; min-width: 44px; min-height: 44px; }
  .app-body[data-nav-open] .sidebar { transform: none; visibility: visible; }
  .app-body[data-nav-open] .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-drawer) - 1);
    background: var(--color-overlay);
  }
  .topbar { padding: 0 var(--space-2) 0 var(--space-2); gap: var(--space-1); }
  .topbar .topbar__menu, .topbar .topbar__back { display: inline-flex; }
  .topbar .topbar__back { max-width: 55%; min-width: 0; }
  .job-indicator__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .job-indicator .menu-trigger { padding-inline: var(--space-2); }
  .topbar .breadcrumb { display: none; }
  .topbar__title {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 600;
  }
  .topbar__help { display: none; }
  .page { padding-top: var(--space-6); padding-bottom: calc(var(--bottomnav-h) + env(safe-area-inset-bottom) + var(--space-8)); }
  .page-header { flex-direction: column; align-items: stretch; }
  .page-header__actions { justify-content: flex-start; }
  .page-header__actions .btn--primary { flex: 1; }

  .bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-sidebar);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    height: calc(var(--bottomnav-h) + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
  }
  .bottom-nav__item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 44px;
    color: var(--color-text-muted);
    font-size: 11px;
    line-height: 14px;
    font-weight: 500;
  }
  .bottom-nav__item .icon { width: 22px; height: 22px; }
  .bottom-nav__item:hover { text-decoration: none; color: var(--color-text); }
  .bottom-nav__item[aria-current="page"] { color: var(--color-primary-fg); }
  .bottom-nav__item[aria-current="page"]::before {
    content: "";
    position: absolute;
    top: 0;
    left: 28%;
    right: 28%;
    height: 2px;
    border-radius: 0 0 2px 2px;
    background: var(--color-primary);
  }
  .bottom-nav__badge { position: absolute; top: 6px; left: calc(50% + 6px); }
  .app-body[data-focus-screen] .bottom-nav { display: none; }
  .app-body[data-focus-screen] .page { padding-bottom: calc(var(--space-16) + env(safe-area-inset-bottom) + var(--space-8)); }
}

@media (min-width: 768px) {
  .topbar__title { display: none; }
}