/* Expense Books Grid */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.book-card {
  display: block;
  padding: var(--space-xl);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
  color: var(--color-text-primary);
  position: relative;
}

.book-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.book-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.book-card-link {
  text-decoration: none;
  color: inherit;
}

.book-card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
}

.book-card-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
}

.book-card-badge {
  font-size: 0.75rem;
  background: var(--color-accent);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-full, 9999px);
  position: relative;
  z-index: 1;
}

.book-card-description {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin: var(--space-xs) 0;
}

.book-card-meta {
  display: flex;
  gap: var(--space-md);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-top: var(--space-md);
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.breadcrumb-link {
  color: var(--color-accent);
  text-decoration: none;
}

.breadcrumb-link:hover {
  text-decoration: underline;
}

/* Shared badge on book page */
.book-shared-badge {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--color-accent);
  margin-top: var(--space-xs);
}

/* Header actions group */
.header-actions {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

/* Book card actions */
.book-card-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-bg-tertiary);
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* Share description */
.share-description {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

/* Invite link */
.invite-link-container {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  margin-bottom: var(--space-sm);
}

.invite-link-input {
  flex: 1;
  font-family: monospace;
  font-size: 0.8rem;
}

.invite-link-actions {
  margin-top: var(--space-sm);
}

/* Split fieldset container */
fieldset.form-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.02);
}

fieldset.form-group legend {
  padding: 0 var(--space-xs);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Split summary badges */
.split-default-summary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.split-badge {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent-hover);
  border: 1px solid color-mix(in srgb, var(--color-accent) 25%, transparent);
  padding: 1px var(--space-sm);
  border-radius: var(--radius-full, 9999px);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.split-hint {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  margin-top: var(--space-xs);
  font-style: italic;
}

/* Split UI */
.split-options {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.split-option {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.split-option input[type="radio"] {
  accent-color: var(--color-accent);
}

.split-custom-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}

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

.split-member-label {
  flex: 1;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.split-amount-input {
  width: 90px;
  flex-shrink: 0;
}

.form-error-banner {
  color: var(--color-danger, #f87171);
  margin-bottom: 1rem;
}

.form-help {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0;
  text-decoration: none;
}

.btn-link:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .books-grid {
    grid-template-columns: 1fr;
  }

}