/* ═══════════════════════════════════════════
   UI States — Loading, Error, Empty
   Sommplicity · Unified component styles
════════════════════════════════════════════ */

/* ── Skeleton animation ──────────────────── */
@keyframes uiSkeletonPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}
@media (prefers-reduced-motion: reduce) {
  .ui-loading-state * { animation: none !important; opacity: 0.5 !important; }
}

.ui-loading-state {
  padding: 24px 16px;
}

/* Skeleton primitives */
.ui-skeleton-line {
  height: 12px;
  background: var(--border-light, #E8E0D4);
  border-radius: 6px;
  margin-bottom: 10px;
  animation: uiSkeletonPulse 1.6s ease-in-out infinite;
}
.ui-skeleton-rect {
  background: var(--border-light, #E8E0D4);
  border-radius: 8px;
  margin-bottom: 12px;
  animation: uiSkeletonPulse 1.6s ease-in-out infinite;
}
.ui-skeleton-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--border-light, #E8E0D4);
  flex-shrink: 0;
  animation: uiSkeletonPulse 1.6s ease-in-out infinite;
}
.ui-skeleton-btn {
  width: 80px;
  height: 32px;
  background: var(--border-light, #E8E0D4);
  border-radius: 5px;
  animation: uiSkeletonPulse 1.6s ease-in-out infinite;
}

/* Skeleton layouts */
.ui-skeleton-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.ui-skeleton-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}
.ui-skeleton-card {
  padding: 16px;
  border: 1px solid var(--border-light, #E8E0D4);
  border-radius: 8px;
}
.ui-skeleton-list-item {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light, #E8E0D4);
}
.ui-skeleton-lines {
  flex: 1;
}
.ui-skeleton-text {
  max-width: 480px;
}
.ui-skeleton-map {
  aspect-ratio: 2/1;
  background: var(--border-light, #E8E0D4);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: uiSkeletonPulse 1.6s ease-in-out infinite;
}
.ui-skeleton-map-svg {
  width: 60%;
  opacity: 0.3;
  fill: var(--ink-xlight, #A0917F);
  stroke: none;
}
.ui-skeleton-flashcard {
  max-width: 480px;
  margin: 0 auto;
}
.ui-skeleton-table-header,
.ui-skeleton-table-row {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light, #E8E0D4);
}
.ui-skeleton-table-header .ui-skeleton-line { height: 10px; margin-bottom: 0; }
.ui-skeleton-table-row .ui-skeleton-line { margin-bottom: 0; }

/* Retry notice */
.ui-loading-retry {
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--ink-light, #5C4A3A);
  margin-top: 16px;
  padding: 10px;
}
.ui-retry-btn {
  background: var(--maroon, #722F37);
  color: #fff;
  border: none;
  border-radius: 5px;
  padding: 6px 16px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  margin-left: 8px;
  min-height: 44px;
}
.ui-retry-btn:hover { background: #5E252D; }

/* ── Error State ─────────────────────────── */
.ui-error-state {
  text-align: center;
  padding: 48px 24px;
}
.ui-error-inline {
  padding: 24px 16px;
}
.ui-error-illustration {
  width: 60px;
  height: 75px;
  margin: 0 auto 16px;
  color: var(--ink-xlight, #A0917F);
}
.ui-error-illustration svg {
  width: 100%;
  height: 100%;
}
.ui-error-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--ink, #2C1810);
  margin: 0 0 8px;
}
.ui-error-message {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--ink-light, #5C4A3A);
  margin: 0 0 20px;
  line-height: 1.5;
}
.ui-error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Empty State ─────────────────────────── */
.ui-empty-state {
  text-align: center;
  padding: 48px 24px;
}
.ui-empty-illustration {
  width: 60px;
  height: 75px;
  margin: 0 auto 16px;
  color: var(--ink-xlight, #A0917F);
}
.ui-empty-illustration svg {
  width: 100%;
  height: 100%;
}
.ui-empty-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--ink, #2C1810);
  margin: 0 0 8px;
}
.ui-empty-message {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--ink-light, #5C4A3A);
  margin: 0 0 20px;
  line-height: 1.5;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}
.ui-empty-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Shared buttons ──────────────────────── */
.ui-state-btn {
  font-family: var(--font-body);
  font-size: 0.9rem;
  border-radius: 5px;
  cursor: pointer;
  min-height: 44px;
  padding: 10px 24px;
  transition: background 0.2s;
}
.ui-state-btn-primary {
  background: var(--maroon, #722F37);
  color: #fff;
  border: none;
}
.ui-state-btn-primary:hover { background: #5E252D; }
.ui-state-btn-secondary {
  background: transparent;
  color: var(--maroon, #722F37);
  border: 1.5px solid var(--maroon, #722F37);
}
.ui-state-btn-secondary:hover { background: rgba(114,47,55,0.06); }
.ui-state-btn-link {
  background: none;
  border: none;
  color: var(--ink-light, #5C4A3A);
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 10px 12px;
}
.ui-state-btn-link:hover { color: var(--maroon, #722F37); }

/* ── Responsive ──────────────────────────── */
@media (max-width: 480px) {
  .ui-skeleton-grid { grid-template-columns: 1fr; }
  .ui-skeleton-grid-4 { grid-template-columns: repeat(2, 1fr); }
}