/*
 * Shared UI foundation for the navigation-by-navigation redesign.
 * Business modules consume these tokens; this layer does not own page layout.
 */
:root {
  color-scheme: light;

  --ui-canvas: #f4f5ed;
  --ui-surface: #fffef9;
  --ui-surface-subtle: #f7f9f3;
  --ui-ink: #12372d;
  --ui-muted: #68766f;
  --ui-border: #d8ded2;
  --ui-brand: #0b6b51;
  --ui-brand-deep: #063c2f;
  --ui-action: #d7f451;
  --ui-action-ink: #14382e;
  --ui-info: #356f93;
  --ui-success: #257454;
  --ui-warning: #9a6a12;
  --ui-danger: #ad4539;

  --ui-space-1: 4px;
  --ui-space-2: 8px;
  --ui-space-3: 12px;
  --ui-space-4: 16px;
  --ui-space-5: 20px;
  --ui-space-6: 24px;
  --ui-space-8: 32px;

  --ui-radius-control: 10px;
  --ui-radius-card: 16px;
  --ui-radius-pill: 999px;
  --ui-shadow-card: 0 14px 40px rgba(6, 60, 47, 0.07);
  --ui-shadow-raised: 0 20px 54px rgba(6, 60, 47, 0.11);
  --ui-focus-ring: 0 0 0 3px rgba(11, 107, 81, 0.2);

  --ui-duration-fast: 140ms;
  --ui-duration-normal: 220ms;
}

:where(button, a, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--ui-brand);
  outline-offset: 2px;
  box-shadow: var(--ui-focus-ring);
}

:where(button, input, select, textarea):disabled,
[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

.ui-state {
  min-height: 144px;
  display: grid;
  place-items: center;
  gap: var(--ui-space-3);
  padding: var(--ui-space-6);
  color: var(--ui-muted);
  background: var(--ui-surface-subtle);
  border: 1px dashed var(--ui-border);
  border-radius: var(--ui-radius-card);
  text-align: center;
}

.ui-state > div {
  display: grid;
  gap: var(--ui-space-2);
  justify-items: center;
}

.ui-state strong {
  color: var(--ui-ink);
}

.ui-state p {
  max-width: 42ch;
  margin: 0;
  line-height: 1.65;
}

.ui-state[data-tone="error"] {
  color: var(--ui-danger);
  background: #fff7f4;
  border-color: #ebc8c1;
}

.ui-status {
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  padding: 0 9px;
  color: var(--ui-muted);
  background: var(--ui-surface-subtle);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius-pill);
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}

.ui-status[data-tone="success"] {
  color: var(--ui-success);
  background: #edf8f1;
  border-color: #cfe7d8;
}

.ui-status[data-tone="warning"] {
  color: var(--ui-warning);
  background: #fff8e7;
  border-color: #eeddae;
}

.ui-status[data-tone="danger"] {
  color: var(--ui-danger);
  background: #fff2ef;
  border-color: #edcec7;
}

.ui-skeleton {
  min-height: 14px;
  overflow: hidden;
  border-radius: 6px;
  background: #e9ede5;
}

.ui-skeleton::after {
  content: "";
  display: block;
  width: 45%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.76), transparent);
  animation: ui-skeleton-sweep 1.35s ease-in-out infinite;
}

@keyframes ui-skeleton-sweep {
  from { transform: translateX(-120%); }
  to { transform: translateX(260%); }
}

@media (prefers-reduced-motion: reduce) {
  .ui-skeleton::after {
    animation: none;
  }
}