.app-shell {
  display: grid;
  grid-template-rows: var(--toolbar-height) 1fr;
  height: 100%;
  width: 100%;
  background-color: var(--color-bg);
}

.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0 var(--space-lg);
  background:
    linear-gradient(to bottom, var(--color-surface) 0%, var(--color-surface-elevated) 100%);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-toolbar);
  box-shadow: var(--shadow-sm);
}

.toolbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* MV_BrandMark — the brand component. Swap markup in js/brand.js and styling
   here to evolve the brand. Two sizes: small (toolbar) and large (welcome).
   Renders "Vivi" as italic Fraunces with an accent under-stroke. */
.brand-mark {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.015em;
  line-height: 1;
  color: var(--color-accent);
  user-select: none;
  position: relative;
  padding: 0 4px 4px;
}

.brand-mark__text {
  display: inline-flex;
  align-items: baseline;
  position: relative;
}

.brand-mark__text::after {
  content: "";
  position: absolute;
  left: 10%;
  right: 12%;
  bottom: -4px;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-highlight) 50%,
    transparent 100%);
  border-radius: var(--radius-pill);
  opacity: 0.85;
}

.brand-mark__lead {
  display: inline-block;
  font-size: 1.06em;
  margin-right: 0.01em;
}

.brand-mark--small {
  font-size: 1.5rem;
}

.brand-mark--large {
  font-size: 4.25rem;
  color: var(--color-accent);
}

.brand-mark--large .brand-mark__text::after {
  height: 3px;
  bottom: -8px;
}

.toolbar__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-md);
  color: var(--color-text);
  margin-left: var(--space-md);
  padding-left: var(--space-md);
  border-left: 1px solid var(--color-border);
  letter-spacing: var(--letter-spacing-tight);
}

.toolbar__spacer {
  flex: 1;
}

.toolbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Owner-only "N pending review" chip in the toolbar. Brass tint, not red —
   this is an attention nudge, not an alarm. Hidden when the queue is
   empty or the current user can't approve. */
.toolbar__pending {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xxs);
  padding: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-pill);
  background-color: var(--color-highlight-soft);
  color: var(--color-highlight);
  border: 1px solid var(--color-highlight);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.toolbar__pending:hover {
  background-color: var(--color-surface);
  transform: translateY(-1px);
}

.toolbar__pending-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-highlight);
  flex-shrink: 0;
}

.toolbar__pending-label {
  white-space: nowrap;
}

/* Demo-mode chip — visible only when the user loaded a `?demo=…` URL. The
   "DEMO" tag is a serif italic tag in brand green so the user always knows
   they're not in their real tree; "Exit" reverts to their own tree. */
.toolbar__demo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xxs) var(--space-sm);
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition:
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.toolbar__demo:hover {
  background-color: var(--color-surface);
  transform: translateY(-1px);
}

.toolbar__demo-tag {
  font-family: var(--font-serif);
  font-style: italic;
  letter-spacing: 0.06em;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xs);
  padding: 1px var(--space-xxs);
  background-color: var(--color-accent);
  color: var(--color-surface);
  border-radius: var(--radius-sm);
}

.toolbar__demo-label {
  white-space: nowrap;
}

.toolbar__user {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: var(--space-xxs) var(--space-sm) var(--space-xxs) var(--space-xxs);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
}

.toolbar__user-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--color-accent-soft);
  background-size: cover;
  background-position: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border: 1px solid transparent;
  background-color: transparent;
  color: var(--color-text);
  cursor: pointer;
  letter-spacing: 0.005em;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.btn:hover {
  background-color: var(--color-surface-alt);
}

.btn--primary {
  background:
    linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: var(--color-surface);
  border-color: var(--color-accent-hover);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    0 1px 2px rgba(14, 92, 63, 0.2);
}

.btn--primary:hover {
  filter: brightness(1.04);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    0 4px 14px rgba(14, 92, 63, 0.36);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--ghost {
  border-color: var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-border-strong);
  background-color: var(--color-surface-alt);
}

.btn--danger {
  color: var(--color-error);
}

.btn--danger:hover {
  background-color: var(--color-error-soft);
}

.btn--icon {
  padding: var(--space-xs);
  width: 36px;
  height: 36px;
}

.btn--lg {
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--font-size-base);
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  filter: none;
}

.main {
  position: relative;
  overflow: hidden;
  background-color: var(--color-bg);
}

.welcome {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  background:
    radial-gradient(ellipse at top left, var(--color-accent-soft) 0%, transparent 55%),
    radial-gradient(ellipse at bottom right, var(--color-highlight-soft) 0%, transparent 60%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-tint) 100%);
}

.welcome::before,
.welcome::after {
  content: "";
  position: absolute;
  pointer-events: none;
  opacity: 0.4;
}

.welcome::before {
  top: 8%;
  left: 6%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-soft) 0%, transparent 70%);
  filter: blur(20px);
}

.welcome::after {
  bottom: 6%;
  right: 8%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-highlight-soft) 0%, transparent 70%);
  filter: blur(28px);
}

.welcome__card {
  position: relative;
  max-width: 520px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xxl) var(--space-xxl) var(--space-xl);
  box-shadow: var(--shadow-xl);
  text-align: center;
  z-index: var(--z-base);
}

.welcome__card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 18%;
  right: 18%;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-accent) 30%,
    var(--color-highlight) 70%,
    transparent 100%
  );
  border-radius: var(--radius-pill);
}

.welcome__brand {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.welcome__title {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.65rem;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-medium);
}

.welcome__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  line-height: var(--line-height-normal);
  font-style: italic;
}

.welcome__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: stretch;
  margin-bottom: var(--space-md);
}

.welcome__hint {
  margin-top: var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  line-height: var(--line-height-loose);
  max-width: 44ch;
  margin-left: auto;
  margin-right: auto;
}

.welcome__hint strong {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}

.setup-card {
  text-align: left;
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-md) var(--space-md);
  background-color: var(--color-highlight-soft);
  border: 1px solid var(--color-highlight);
  border-radius: var(--radius-md);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.5);
}

.setup-card__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.setup-card__badge {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-highlight);
  color: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  font-family: var(--font-serif);
}

.setup-card__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-md);
  color: var(--color-text);
  font-weight: var(--font-weight-bold);
  margin: 0;
  line-height: var(--line-height-tight);
}

.setup-card__time {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-regular);
  font-style: italic;
  margin-top: 2px;
}

.setup-card__why {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: var(--line-height-loose);
  margin: 0 0 var(--space-sm);
}

.setup-card__why em {
  color: var(--color-text-muted);
}

.setup-card__steps {
  list-style: none;
  counter-reset: setup;
  padding: 0;
  margin: 0 0 var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.setup-card__steps li {
  counter-increment: setup;
  position: relative;
  padding-left: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: var(--line-height-normal);
}

.setup-card__steps li::before {
  content: counter(setup);
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-highlight);
  color: var(--color-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.setup-card__steps a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-soft);
  text-underline-offset: 3px;
}

.setup-card__steps a:hover {
  text-decoration-color: var(--color-accent);
}

.setup-card code {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1px 5px;
  word-break: break-all;
  color: var(--color-text);
}

.setup-card__footer {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-style: italic;
  margin: 0;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  text-align: center;
  pointer-events: none;
}

.empty-state__card {
  pointer-events: auto;
  max-width: 460px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-xxl);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.empty-state__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.empty-state__icon svg {
  width: 32px;
  height: 32px;
}

.empty-state__title {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--font-size-xxl);
  color: var(--color-text);
  margin: 0;
  letter-spacing: var(--letter-spacing-tight);
}

.empty-state__subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-loose);
  margin: 0;
  max-width: 36ch;
}

.empty-state__hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-faint);
  line-height: var(--line-height-normal);
  margin-top: var(--space-xs);
}

.fab {
  position: absolute;
  left: var(--space-md);
  bottom: var(--space-md);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md) var(--space-sm) var(--space-sm);
  background:
    linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: var(--color-surface);
  border: 1px solid var(--color-accent-hover);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  box-shadow: var(--shadow-fab);
  cursor: pointer;
  z-index: var(--z-base);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

.fab:hover {
  filter: brightness(1.04);
  transform: translateY(-1px);
  box-shadow:
    0 1px 2px rgba(14, 92, 63, 0.18),
    0 14px 32px rgba(14, 92, 63, 0.42);
}

.fab:active {
  transform: translateY(0);
}

.fab__icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.add-chooser {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.add-chooser__option {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.add-chooser__option:hover {
  border-color: var(--color-accent);
  background-color: var(--color-accent-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.add-chooser__option-title {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

@media (max-width: 640px) {
  .toolbar {
    padding: 0 var(--space-md);
  }

  .toolbar__title {
    display: none;
  }

  .toolbar__user span {
    display: none;
  }

  .add-chooser {
    grid-template-columns: 1fr;
  }

  .welcome__card {
    padding: var(--space-xl) var(--space-lg);
  }

  .welcome__title {
    font-size: var(--font-size-xxl);
  }
}