/* SMAU FILE
 * Path: css/smau-recents.css
 * Owns:
 *   - Recents surface visuals (dim/blur), card stack styling, contained scrolling inside Recents, focus/active affordances, transform-only motion polish
 * Invariants:
 *   - Mechanics truth is data-state only (open = [data-state="open"]; closed = anything else).
 *   - Recents backdrop is visual-only and never blocks taps (pointer-events: none always).
 *   - Recents surface roots are inert by default (pointer-events: none) and only become interactive when open.
 *   - Scroll is contained within the Recents stack surface (no page/body scroll reliance).
 *   - No z-index rules apply outside Recents DOM roots.
 *   - aria-hidden is accessibility mirror-only and must not override mechanics here.
 * DOM Roots:
 *   - #screen-recents, #recents-root, [data-recents]
 * Touches:
 *   - Selectors: #screen-recents, #recents-root, [data-recents], .recents-*, .smau-recents-*, [data-recents-card], [data-recents-backdrop]
 *   - Tokens: --recents-* | --smau-dur-* | --smau-ease-* | --smau-color-* | --os-ink | --focus-ring-* | --z-screens | optional --smau-recents-*
 * Exports:
 *   - Tokens: (none)
 * Depends:
 *   - Tokens: --z-screens, --smau-dur-*, --smau-ease-*, --smau-color-ink, --os-ink, --focus-ring-*, optional --smau-recents-* overrides
 * Truth Writes:
 *   - none (data-state is the only mechanics truth; aria-hidden is mirror-only)
 * Allowed:
 *   - tokenization via CSS vars without appearance change
 *   - interaction safety fixes inside DOM Roots only
 * No:
 *   - global blankets | cross-root styling | gesture-breaking touch-action traps | random z-index escalation
 * Rules:
 *   - Only write selectors under DOM Roots.
 *   - No legacy mechanics classes (.hidden/.is-open/.is-visible/.is-active/body mechanics) in this file.
 *   - No compatibility root bridges in this file; canonical roots only.
 */

/* -------------------------------------------------------------------------- */
/* Canonical roots                                                             */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) {
  --recents-card-radius: var(--smau-recents-card-radius, 22px);
  --recents-card-gap: var(--smau-recents-card-gap, 12px);
  --recents-stack-pad-x: var(--smau-recents-pad-x, 14px);
  --recents-stack-pad-top: var(--smau-recents-pad-top, 16px);
  --recents-stack-pad-bottom: var(--smau-recents-pad-bottom, 18px);

  --recents-dim-alpha: var(--smau-recents-dim-alpha, 0.46);
  --recents-blur: var(--smau-recents-blur, 18px);

  --recents-card-shadow: var(
    --smau-recents-card-shadow,
    var(--smau-shadow-float, 0 18px 46px rgba(0, 0, 0, 0.50))
  );

  --recents-card-border: var(
    --smau-recents-card-border,
    var(--smau-color-border, rgba(255, 255, 255, 0.10))
  );

  --recents-card-bg: var(
    --smau-recents-card-bg,
    radial-gradient(circle at 30% 10%, rgba(255, 255, 255, 0.08), transparent 55%),
    var(--smau-color-panel, rgba(7, 10, 24, 0.92))
  );

  --recents-focus-border: var(
    --smau-recents-focus-border,
    var(--focus-ring-color, rgba(79, 140, 255, 0.90))
  );

  --recents-focus-inset: var(
    --smau-recents-focus-inset,
    var(--focus-ring-soft, rgba(79, 140, 255, 0.22))
  );

  --recents-dur-micro: var(--smau-dur-micro, 0.12s);
  --recents-dur-ui: var(--smau-dur-ui, 0.18s);
  --recents-dur-layer: var(--smau-dur-layer, 0.24s);

  --recents-ease-out: var(--smau-ease-out, ease);
  --recents-ease-io: var(--smau-ease-io, ease);

  --recents-lift: var(--smau-recents-lift, 10px);

  --recents-ink: var(--smau-color-ink, var(--os-ink, #f5f5f8));
}

/* -------------------------------------------------------------------------- */
/* Screen root                                                                 */
/* Truth model: data-state only                                                */
/* IMPORTANT: screen root must be inert when closed to avoid dead taps         */
/* -------------------------------------------------------------------------- */

#screen-recents {
  position: absolute;
  inset: 0;

  z-index: var(--z-screens, 10);

  background: transparent;
  overflow: hidden;
  overscroll-behavior: contain;

  /* CLOSED DEFAULT: do not intercept taps when not open */
  pointer-events: none;
  opacity: 0;
  visibility: hidden;

  touch-action: pan-x pan-y pinch-zoom;
  -webkit-tap-highlight-color: transparent;

  transition:
    opacity var(--recents-dur-layer) var(--recents-ease-out),
    visibility 0s linear var(--recents-dur-layer);
}

#screen-recents[data-state="open"] {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;

  transition:
    opacity var(--recents-dur-layer) var(--recents-ease-out),
    visibility 0s linear 0s;
}

/* NOTE: aria-hidden is mirror-only; no mechanics override here. */

/* -------------------------------------------------------------------------- */
/* Recents surface roots (inert by default)                                    */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) {
  position: absolute;
  inset: 0;

  z-index: var(--z-screens, 10);

  background: transparent;
  overflow: hidden;
  overscroll-behavior: contain;

  touch-action: pan-x pan-y pinch-zoom;
  -webkit-tap-highlight-color: transparent;

  pointer-events: none;

  /* VISUAL CLOSED DEFAULT (prevents header/cards showing while closed) */
  opacity: 0;
  visibility: hidden;
  transform: translate3d(0, 10px, 0) scale(0.99);

  transition:
    opacity var(--recents-dur-layer) var(--recents-ease-out),
    transform var(--recents-dur-layer) var(--recents-ease-io),
    visibility 0s linear var(--recents-dur-layer);

  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  box-sizing: border-box;
}

/* NOTE: aria-hidden is mirror-only; no mechanics override here. */

/* Open gating: either screen is open OR the surface root is open */
#screen-recents[data-state="open"] :where(#recents-root, [data-recents]),
:where(#recents-root, [data-recents])[data-state="open"] {
  pointer-events: auto;

  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0) scale(1);

  transition:
    opacity var(--recents-dur-layer) var(--recents-ease-out),
    transform var(--recents-dur-layer) var(--recents-ease-io),
    visibility 0s linear 0s;
}

/* -------------------------------------------------------------------------- */
/* Backdrop (visual-only, never blocks taps)                                   */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) :where(.smau-recents-dim, [data-recents-backdrop], .recents-backdrop) {
  position: absolute;
  inset: 0;

  background: rgba(0, 0, 0, var(--recents-dim-alpha));
  backdrop-filter: blur(var(--recents-blur));
  -webkit-backdrop-filter: blur(var(--recents-blur));

  opacity: 0;
  pointer-events: none;

  transition: opacity var(--recents-dur-layer) var(--recents-ease-out);
}

#screen-recents[data-state="open"]
  :where(#recents-root, [data-recents])
  :where(.smau-recents-dim, [data-recents-backdrop], .recents-backdrop),
:where(#recents-root, [data-recents])[data-state="open"]
  :where(.smau-recents-dim, [data-recents-backdrop], .recents-backdrop) {
  opacity: 1;
}

/* -------------------------------------------------------------------------- */
/* Header                                                                      */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) :where(.recents-header, .smau-recents-header) {
  position: relative;
  z-index: 2;

  padding-top: var(--recents-stack-pad-top);
  padding-left: var(--recents-stack-pad-x);
  padding-right: var(--recents-stack-pad-x);
  padding-bottom: 10px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;

  color: var(--recents-ink);
  pointer-events: none;
}

:where(#recents-root, [data-recents]) :where(.recents-title, .smau-recents-title) {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0.92;
  pointer-events: none;
}

:where(#recents-root, [data-recents]) :where(.recents-clear, .smau-recents-clear) {
  pointer-events: auto;

  border-radius: 999px;
  border: 1px solid var(--smau-color-border-strong, rgba(255, 255, 255, 0.18));
  background: var(--smau-color-panel-2, rgba(5, 6, 16, 0.78));
  color: var(--recents-ink);
  font-size: 11px;
  padding: 6px 10px;

  cursor: pointer;
  user-select: none;

  transition: transform var(--recents-dur-ui) var(--recents-ease-out),
    background var(--recents-dur-ui) var(--recents-ease-out),
    border-color var(--recents-dur-ui) var(--recents-ease-out),
    opacity var(--recents-dur-ui) var(--recents-ease-out);

  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) and (pointer: fine) {
  :where(#recents-root, [data-recents]) :where(.recents-clear, .smau-recents-clear):hover {
    background: var(--smau-color-panel, rgba(7, 10, 24, 0.94));
    border-color: var(--smau-color-border-strong, rgba(255, 255, 255, 0.22));
    transform: translateY(-1px);
  }
}

:where(#recents-root, [data-recents]) :where(.recents-clear, .smau-recents-clear):active {
  transform: translateY(0) scale(0.98);
}

/* -------------------------------------------------------------------------- */
/* Stack (contained scrolling)                                                 */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) :where(.recents-stack, .smau-recents-cards) {
  position: relative;
  z-index: 2;

  height: 100%;
  min-height: 0;

  padding-left: var(--recents-stack-pad-x);
  padding-right: var(--recents-stack-pad-x);
  padding-top: 0;
  padding-bottom: var(--recents-stack-pad-bottom);

  display: flex;
  flex-direction: column;
  gap: var(--recents-card-gap);

  overflow: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;

  touch-action: pan-y pinch-zoom;
  -webkit-tap-highlight-color: transparent;
}

/* Headerless variant (canonical attribute) */
:where(#recents-root, [data-recents])[data-recents-header="off"] :where(.recents-stack, .smau-recents-cards) {
  padding-top: var(--recents-stack-pad-top);
}

:where(#recents-root, [data-recents]) :where(.recents-stack, .smau-recents-cards)::before {
  content: "";
  position: sticky;
  top: 0;
  height: 12px;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.0));
  opacity: 0.85;
}

/* -------------------------------------------------------------------------- */
/* Cards                                                                       */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) :where(.recents-card, .smau-recents-card, [data-recents-card]) {
  position: relative;

  border-radius: var(--recents-card-radius);
  border: 1px solid var(--recents-card-border);
  background: var(--recents-card-bg);

  box-shadow: var(--recents-card-shadow);
  overflow: hidden;

  transform: translateY(var(--recents-lift)) scale(0.985);
  opacity: 0;

  transition: transform var(--recents-dur-layer) var(--recents-ease-io),
    opacity var(--recents-dur-layer) var(--recents-ease-out),
    border-color var(--recents-dur-ui) var(--recents-ease-out),
    box-shadow var(--recents-dur-ui) var(--recents-ease-out);

  will-change: transform, opacity;

  user-select: none;
  cursor: pointer;

  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

/* Cards visible when open */
#screen-recents[data-state="open"]
  :where(#recents-root, [data-recents])
  :where(.recents-card, .smau-recents-card, [data-recents-card]),
:where(#recents-root, [data-recents])[data-state="open"]
  :where(.recents-card, .smau-recents-card, [data-recents-card]) {
  transform: translateY(0) scale(1);
  opacity: 1;
}

/* Focus affordance (styling only, non-mechanical) */
:where(#recents-root, [data-recents]) :where(.recents-card, .smau-recents-card, [data-recents-card])[data-focused="true"],
:where(#recents-root, [data-recents]) :where(.recents-card, .smau-recents-card, [data-recents-card])[aria-current="true"] {
  border-color: var(--recents-focus-border);
  box-shadow: 0 22px 56px rgba(0, 0, 0, 0.82),
    0 0 0 1px var(--recents-focus-inset) inset;
}

@media (hover: hover) and (pointer: fine) {
  :where(#recents-root, [data-recents]) :where(.recents-card, .smau-recents-card, [data-recents-card]):hover {
    transform: translateY(-2px) scale(1.01);
    border-color: var(--smau-color-border-strong, rgba(255, 255, 255, 0.16));
  }
}

:where(#recents-root, [data-recents]) :where(.recents-card, .smau-recents-card, [data-recents-card]):active {
  transform: translateY(0) scale(0.992);
}

/* -------------------------------------------------------------------------- */
/* Card chrome                                                                 */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) :where(.recents-card-top, .smau-recents-card-top) {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;

  padding: 10px 10px 8px;

  background: linear-gradient(180deg, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.0));
  color: rgba(245, 245, 248, 0.92);

  pointer-events: none;
}

:where(#recents-root, [data-recents]) :where(.recents-card-title, .smau-recents-card-title) {
  font-size: 11px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  pointer-events: none;
}

:where(#recents-root, [data-recents]) :where(.recents-card-close, .smau-recents-card-close) {
  pointer-events: auto;

  width: 30px;
  height: 30px;
  border-radius: 999px;

  border: 1px solid var(--smau-color-border-strong, rgba(255, 255, 255, 0.18));
  background: var(--smau-color-panel-2, rgba(5, 6, 16, 0.78));
  color: rgba(245, 245, 248, 0.95);

  display: inline-flex;
  align-items: center;
  justify-content: center;

  cursor: pointer;
  user-select: none;

  transition: transform var(--recents-dur-ui) var(--recents-ease-out),
    background var(--recents-dur-ui) var(--recents-ease-out),
    border-color var(--recents-dur-ui) var(--recents-ease-out),
    opacity var(--recents-dur-ui) var(--recents-ease-out);

  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

@media (hover: hover) and (pointer: fine) {
  :where(#recents-root, [data-recents]) :where(.recents-card-close, .smau-recents-card-close):hover {
    background: var(--smau-color-panel, rgba(7, 10, 24, 0.94));
    border-color: var(--smau-color-border-strong, rgba(255, 255, 255, 0.22));
    transform: scale(1.04);
  }
}

:where(#recents-root, [data-recents]) :where(.recents-card-close, .smau-recents-card-close):active {
  transform: scale(0.96);
}

:where(#recents-root, [data-recents]) :where(.recents-card-snapshot, .smau-recents-card-snapshot) {
  height: 420px;
  max-height: 58vh;

  background: rgba(0, 0, 0, 0.18);

  display: flex;
  align-items: stretch;
  justify-content: stretch;

  pointer-events: none;
}

:where(#recents-root, [data-recents]) :where(.recents-card-snapshot, .smau-recents-card-snapshot) > * {
  width: 100%;
  height: 100%;
  border: 0;
  pointer-events: none;
}

/* -------------------------------------------------------------------------- */
/* Empty state + handle                                                        */
/* -------------------------------------------------------------------------- */

:where(#recents-root, [data-recents]) :where(.recents-empty, .smau-recents-empty) {
  position: relative;
  z-index: 2;

  margin-top: 18px;
  padding: 16px 14px;

  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  background: rgba(5, 6, 14, 0.35);

  color: rgba(245, 245, 248, 0.82);
  font-size: 12px;
  text-align: center;

  opacity: 0.95;
}

:where(#recents-root, [data-recents]) :where(.recents-handle, .smau-recents-handle) {
  position: absolute;
  left: 50%;
  bottom: calc(10px + env(safe-area-inset-bottom));
  transform: translateX(-50%);

  width: 54px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);

  pointer-events: none;
  z-index: 3;
  opacity: 0.65;
}

/* -------------------------------------------------------------------------- */
/* Reduced motion                                                              */
/* -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  :where(#recents-root, [data-recents]) :where(
    .smau-recents-dim,
    [data-recents-backdrop],
    .recents-backdrop,
    .recents-card,
    .smau-recents-card,
    [data-recents-card],
    .recents-clear,
    .smau-recents-clear,
    .recents-card-close,
    .smau-recents-card-close
  ) {
    transition-duration: 1ms !important;
  }

  :where(#recents-root, [data-recents]) {
    transition-duration: 1ms !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  :where(#recents-root, [data-recents]) :where(.recents-card, .smau-recents-card, [data-recents-card]) {
    transform: none !important;
    opacity: 1 !important;
  }

  #screen-recents {
    transition-duration: 1ms !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}