/* ------------------------------------------------------------------ */
/* Motion primitives                                                   */
/*                                                                    */
/* Compositor-friendly only (transform, opacity, filter). The rules    */
/* are scoped to data-design so the workspace's default look does not  */
/* change by accident.                                                 */
/* ------------------------------------------------------------------ */

:root[data-design="ember"] .ui-btn,
:root[data-design="ember"] button.ui,
:root[data-design="ember"] .lounge-btn {
  transition:
    transform var(--motion-fast) var(--ease-spring),
    box-shadow var(--motion-base) var(--ease-out),
    background-color var(--motion-base) var(--ease-out),
    border-color var(--motion-base) var(--ease-out);
}

:root[data-design="ember"] .ui-btn:hover,
:root[data-design="ember"] .lounge-btn:hover {
  transform: var(--lift);
  box-shadow: var(--glow);
}

:root[data-design="ember"] .ui-btn:active,
:root[data-design="ember"] .lounge-btn:active {
  transform: var(--press);
}

:root[data-design="ember"] :focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Switch ------------------------------------------------------------- */

.ui-switch {
  position: relative;
  display: inline-flex;
  width: 44px;
  height: 25px;
  flex: 0 0 44px;
  border-radius: 999px;
  background: var(--surface-3);
  transition: background var(--motion-base) var(--ease-out);
}

.ui-switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--text);
  transition: transform var(--motion-base) var(--ease-spring),
    background var(--motion-base) var(--ease-out);
}

.ui-switch[aria-checked="true"] {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
}

.ui-switch[aria-checked="true"]::after {
  transform: translateX(19px);
  background: var(--accent-ink);
}

/* Tabs --------------------------------------------------------------- */

.ui-tab-indicator {
  transition: transform var(--motion-base) var(--ease-spring);
}

/* Dialogs and sheets ------------------------------------------------- */

.ui-dialog {
  animation: ui-dialog-in var(--motion-base) var(--ease-spring) both;
}

.ui-backdrop {
  animation: ui-fade-in var(--motion-base) var(--ease-out) both;
}

@keyframes ui-dialog-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes ui-fade-in {
  from {
    opacity: 0;
    backdrop-filter: blur(0);
  }
  to {
    opacity: 1;
  }
}

/* Toasts ------------------------------------------------------------- */

.ui-toast {
  animation: ui-toast-in var(--motion-slow) var(--ease-spring) both;
}

@keyframes ui-toast-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Lists -------------------------------------------------------------- */

.ui-stagger > * {
  animation: ui-rise var(--motion-slow) var(--ease-out) both;
}

.ui-stagger > *:nth-child(1) { animation-delay: 0ms; }
.ui-stagger > *:nth-child(2) { animation-delay: 40ms; }
.ui-stagger > *:nth-child(3) { animation-delay: 80ms; }
.ui-stagger > *:nth-child(4) { animation-delay: 120ms; }
.ui-stagger > *:nth-child(5) { animation-delay: 160ms; }
.ui-stagger > *:nth-child(6) { animation-delay: 200ms; }

@keyframes ui-rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Skeleton ----------------------------------------------------------- */

.ui-skeleton {
  background: linear-gradient(
    100deg,
    var(--surface) 20%,
    var(--surface-2) 40%,
    var(--surface) 60%
  );
  background-size: 240% 100%;
  animation: ui-shimmer 1.6s linear infinite;
}

@keyframes ui-shimmer {
  from { background-position: 120% 0; }
  to { background-position: -120% 0; }
}

/* Page transition fallback (View Transitions used when available). */

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: var(--motion-base);
  animation-timing-function: var(--ease-out);
}

@media (prefers-reduced-motion: reduce) {
  .ui-dialog,
  .ui-backdrop,
  .ui-toast,
  .ui-stagger > *,
  .ui-skeleton {
    animation: none !important;
  }
}