.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.mobile-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: calc(var(--topbar-height) + env(safe-area-inset-top, 0px));
  min-height: calc(var(--topbar-height) + env(safe-area-inset-top, 0px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  padding-top: env(safe-area-inset-top, 0px);
  background: var(--surface-1);
  box-shadow: var(--shadow-medium);
  overflow: hidden;
}

.mobile-topbar__title {
  font-size: 1.05rem;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.mobile-topbar .theme-toggle {
  flex-shrink: 0;
}

.main-content {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: var(--space-4);
  padding-bottom: calc(var(--bottom-nav-height) + var(--space-6));
  min-width: 0;
}

.main-content > .view {
  width: 100%;
  max-width: 720px;
}

.view {
  display: none;
  animation: fadeIn var(--transition-base);
}
.view.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Bottom navigation — mobile-first, always visible */
.bottom-nav {
  position: fixed;
  bottom: 0;
  right: 0;
  left: 0;
  z-index: 30;
  height: var(--bottom-nav-height);
  display: flex;
  align-items: center;
  background: var(--surface-1);
  box-shadow: var(--shadow-heavy);
  padding-bottom: env(safe-area-inset-bottom);
}

.bottom-nav__items {
  flex: 1;
  display: flex;
  min-width: 0;
}

.bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.bottom-nav__item svg { width: 22px; height: 22px; }

.bottom-nav__item.active {
  color: var(--color-accent);
  font-weight: 700;
}

.bottom-nav__item.fab {
  position: relative;
  top: -18px;
}

.bottom-nav__fab-circle {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-circle);
  background: var(--color-accent);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-heavy);
}

/* Brand + theme toggle block — only rendered inside the sidebar on desktop */
.bottom-nav__brand {
  display: none;
}

.bottom-nav__brand-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-base);
  white-space: nowrap;
}

/* Section grouping in Tasks view */
.task-section {
  margin-bottom: var(--space-6);
}

.task-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
  padding: 0 var(--space-1);
}

.task-section__title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1.2px;
}