/* Shared BookDinks interaction primitives.
   Product surfaces customize the variables; behavior and accessibility stay unified. */
:root {
  --control-min-height: 40px;
  --control-padding: 9px 14px;
  --control-radius: var(--radius-sm);
  --control-transition: 150ms ease;
  --focus-color: var(--brand-lime-strong);
  --focus-ring: 0 0 0 3px color-mix(in srgb, var(--focus-color) 28%, transparent);
  --action-primary-bg: var(--brand-green);
  --action-primary-hover: var(--brand-green-strong);
  --action-primary-text: #ffffff;
  --field-bg: var(--product-surface);
  --field-border: var(--product-border);
  --card-bg: var(--product-surface);
  --card-border: var(--product-border);
  --card-radius: var(--radius-lg);
  --card-shadow: 0 1px 2px rgba(23, 33, 27, 0.05);
  --skeleton-base: var(--product-surface-muted);
  --skeleton-highlight: color-mix(in srgb, var(--product-surface) 72%, var(--product-border));
}

:where(.bd-button, .save-btn, .bd-primary-action, .empty-action-btn, .btn) {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: var(--control-min-height);
  border-radius: var(--control-radius);
  font-family: var(--product-font);
  font-weight: 700;
  transition: background-color var(--control-transition), border-color var(--control-transition), color var(--control-transition), transform 80ms ease;
}

:where(.bd-button, .save-btn, .bd-primary-action, .empty-action-btn, .btn):focus-visible,
:where(input, select, textarea, .field):focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

:where(.bd-button, .save-btn, .bd-primary-action, .empty-action-btn, .btn):active:not(:disabled) {
  transform: translateY(1px);
}

:where(input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]), select, textarea, .field) {
  min-height: var(--control-min-height);
  border-color: var(--field-border);
  border-radius: var(--control-radius);
  background: var(--field-bg);
}

:where(.bd-card, .form-card, .panel-card, .auth-card) {
  border-color: var(--card-border);
  border-radius: var(--card-radius);
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
}

:where(.bd-skeleton, .public-event-skeleton span) {
  background: linear-gradient(90deg, var(--skeleton-base) 25%, var(--skeleton-highlight) 50%, var(--skeleton-base) 75%);
  background-size: 200% 100%;
  animation: bookdinks-skeleton 1.1s linear infinite;
}

[data-tooltip] { position: relative; }
[data-tooltip]::after {
  position: absolute;
  z-index: 1000;
  right: 0;
  bottom: calc(100% + 8px);
  width: max-content;
  max-width: min(240px, 80vw);
  padding: 6px 9px;
  border-radius: var(--radius-sm);
  background: var(--product-brand-deep);
  color: #ffffff;
  content: attr(data-tooltip);
  font: 600 12px/1.35 var(--product-font);
  opacity: 0;
  pointer-events: none;
  transform: translateY(3px);
  transition: opacity var(--control-transition), transform var(--control-transition);
}
[data-tooltip]:is(:hover, :focus-visible)::after { opacity: 1; transform: translateY(0); }

@keyframes bookdinks-skeleton { to { background-position: -200% 0; } }

@media (prefers-reduced-motion: reduce) {
  :where(.bd-skeleton, .public-event-skeleton span) { animation: none; }
  :where(.bd-button, .save-btn, .bd-primary-action, .empty-action-btn, .btn) { transition: none; }
}