/* V239 - reusable long-running-action UX: busy bar, toasts, button loading state.
   Reuses existing tokens/colors from style.css (--primary/--green/--red/--amber, .flash.* palette)
   instead of introducing a new visual language. */

@keyframes ux239-spin { to { transform: rotate(360deg); } }
@keyframes ux239-toast-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes ux239-toast-out { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-8px); } }

/* Global busy bar (aria-live status for long actions) */
#ux239-busy-bar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translate(-50%, -120%);
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--ink, #0f172a);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 14px 14px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, .22);
  font-size: 13px;
  font-weight: 700;
  transition: transform .18s ease-out;
  pointer-events: none;
  max-width: min(92vw, 480px);
}
#ux239-busy-bar.is-visible { transform: translate(-50%, 0); }
#ux239-busy-bar .ux239-spinner { width: 15px; height: 15px; border-width: 2px; }
#ux239-busy-bar span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Spinner (shared by busy bar and buttons) */
.ux239-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .4);
  border-top-color: #fff;
  animation: ux239-spin .7s linear infinite;
  flex: none;
}
.btn .ux239-spinner { border-color: rgba(255, 255, 255, .45); border-top-color: #fff; margin-right: 2px; }
.btn.secondary .ux239-spinner,
.btn.small.secondary .ux239-spinner { border-color: rgba(29, 64, 175, .35); border-top-color: #1d40af; }

/* Button loading state - keep layout, just gain a spinner + disabled affordance */
.btn.ux239-btn-loading,
button.ux239-btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  opacity: .82;
  cursor: progress !important;
  pointer-events: none;
}

/* Toast / flash region */
#ux239-toast-region {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(360px, calc(100vw - 36px));
  max-width: 100%;
}
#ux239-toast-region .flash,
#ux239-toast-region .ux239-toast {
  position: relative;
  margin: 0;
  padding-right: 34px;
  box-shadow: 0 10px 26px rgba(15, 23, 42, .12);
  animation: ux239-toast-in .18s ease-out;
  word-break: break-word;
}
#ux239-toast-region .flash.ux239-toast-leaving,
#ux239-toast-region .ux239-toast.ux239-toast-leaving {
  animation: ux239-toast-out .18s ease-in forwards;
}
.ux239-toast-close {
  position: absolute;
  top: 8px;
  right: 8px;
  border: 0;
  background: transparent;
  color: inherit;
  opacity: .55;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  padding: 4px;
}
.ux239-toast-close:hover { opacity: 1; }

/* Fallback palette for toasts created without a Flask flash category (mirrors .flash.*) */
.ux239-toast.ux239-toast-success { background: #ecfdf5; border: 1px solid #bbf7d0; color: #166534; border-radius: 14px; padding: 12px 14px; }
.ux239-toast.ux239-toast-danger { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; border-radius: 14px; padding: 12px 14px; }
.ux239-toast.ux239-toast-warning { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; border-radius: 14px; padding: 12px 14px; }
.ux239-toast.ux239-toast-info { background: #eff6ff; border: 1px solid #bfdbfe; color: #1e40af; border-radius: 14px; padding: 12px 14px; }

@media (max-width: 640px) {
  #ux239-toast-region { top: 10px; right: 10px; left: 10px; width: auto; }
  #ux239-busy-bar { width: calc(100vw - 24px); justify-content: center; }
}