/* Trip page tabs + compact nav header. Split out of styles.css — which is at
   its 500-line cap — following the same per-feature stylesheet convention as
   flipclock.css/checklist.css/expenses.css. Reuses the shared palette and
   existing vocabulary (.card, .btn, .icon-btn, .field, .form-row,
   .form-actions, .form-error, .slideover-head, .overlay, .overlay-center,
   .modal, .member-avatar, .member-remove, .role-badge, .joincode-chip)
   rather than re-declaring it. */

/* ---------- Nav trip-identity slot ---------- */
.nav-trip-slot { display: flex; align-items: center; gap: 0.7rem; flex: 1; min-width: 0; margin: 0 1rem; }
.nav-trip-slot:empty { display: none; margin: 0; }
.nav-trip-back { flex-shrink: 0; font-size: 1.1rem; font-weight: 700; color: var(--brand); }
.nav-trip-back:hover { text-decoration: underline; }
.nav-trip-id { display: flex; flex-direction: column; min-width: 0; flex: 1; line-height: 1.3; }
.nav-trip-name { font-weight: 700; font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-trip-sub { font-size: 0.76rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.nav-trip-menu { position: relative; flex-shrink: 0; }
.nav-trip-menu-btn { font-size: 1.15rem; }

.trip-menu-dropdown {
  position: absolute; top: calc(100% + 0.5rem); right: 0; z-index: 30;
  width: min(300px, 90vw); max-height: 70vh; overflow-y: auto;
  display: none; flex-direction: column; gap: 0.7rem;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg); padding: 0.85rem; animation: fade 0.12s ease;
}
.trip-menu-dropdown.open { display: flex; }
.trip-menu-label { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; color: var(--text-muted); margin-bottom: 0.35rem; }
.trip-menu-members { display: flex; flex-direction: column; gap: 0.4rem; max-height: 200px; overflow-y: auto; }
.trip-menu-member { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; }
.trip-menu-member-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.trip-menu-joincode { display: flex; flex-wrap: wrap; align-items: center; gap: 0.45rem; padding-top: 0.6rem; border-top: 1px solid var(--border); }
.trip-menu-actions { display: flex; flex-direction: column; gap: 0.4rem; padding-top: 0.6rem; border-top: 1px solid var(--border); }
.trip-menu-actions .btn { justify-content: flex-start; }

/* Edit-trip modal reuses .trip-edit's field layout but not its old header-card
   top border/spacing (it now opens directly under the modal's own heading). */
.modal .trip-edit { padding-top: 0; border-top: none; }

/* ---------- Tab bar ---------- */
.tab-bar { display: inline-flex; gap: 0.3rem; padding: 0.3rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.tab-btn { display: flex; align-items: center; gap: 0.4rem; border: none; background: none; padding: 0.5rem 0.9rem; border-radius: var(--radius-sm); cursor: pointer; font-weight: 600; font-size: 0.9rem; color: var(--text-muted); }
.tab-btn:hover { color: var(--text); }
.tab-btn.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.tab-btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.tab-icon { font-size: 1rem; }
.tab-panel[hidden] { display: none; }

/* ---------- Money tab (Costs + Expenses side by side) ---------- */
.money-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; align-items: start; }

/* ---------- Checklist tab (single card, comfortable reading width) ---------- */
.checklist-wrap { max-width: 720px; margin: 0 auto; }

@media (max-width: 900px) {
  .money-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-trip-sub { display: none; }
  .nav-trip-slot { gap: 0.4rem; margin: 0 0.5rem; }
}
@media (max-width: 480px) {
  .tab-label { display: none; }
  .tab-btn { padding: 0.5rem 0.65rem; }
}