/* ============================================================
   YancoTab — Window Manager (Desktop Window Mode)
   Shared scrim, snap preview, window tray, multi-window states.
   All colors resolve to tokens from css/tokens.css; the traffic-
   light literals live in window-chrome.css per its established
   macOS-color exception.
   ============================================================ */

/* ── Shared scrim (one per desktop, owned by the WindowManager) ──
   Replaces the old per-window .window-chrome__scrim: two windows
   would stack two 0.4-alpha layers into a near-black home. */
@keyframes wmScrimFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.wm-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1;
  animation: wmScrimFadeIn 0.3s var(--ease-out) both;
  pointer-events: auto;
}

body.theme-light .wm-scrim {
  background: rgba(0, 0, 0, 0.2);
}

/* ── Snap preview (glass ghost shown while a drag arms a zone) ── */
.wm-snap-preview {
  position: fixed;
  background: rgba(var(--accent-rgb), 0.10);
  border: 1px solid rgba(var(--accent-rgb), 0.35);
  border-radius: var(--radius-lg);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  pointer-events: none;
  transition: left 0.12s var(--ease-out), top 0.12s var(--ease-out),
              width 0.12s var(--ease-out), height 0.12s var(--ease-out);
}

/* ── Multi-window sizing fix ──
   body.is-mobile is unconditional, so .is-mobile .window-chrome's
   max-height calc(100% - 80px …) cap applies on desktop too and a
   half-snapped window would stop ~96px short of the bottom edge. */
body.wm-multi .window-chrome:not(.window-chrome--fullscreen) {
  max-height: 100%;
}

/* ── Unfocused windows (multi mode only) ──
   The current single-window look IS the focused look. Unfocused
   windows drop to a lighter shadow, a dimmed titlebar, and no
   titlebar backdrop-filter — six live blur surfaces is real GPU
   cost that background windows don't need to pay. */
body.wm-multi .window-chrome:not(.window-chrome--focused) {
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(var(--accent-rgb), 0.05),
    var(--inner-glow);
}

body.wm-multi .window-chrome:not(.window-chrome--focused) .window-chrome__titlebar {
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  filter: saturate(0.55) brightness(0.85);
}

/* Light theme tunes both directions down — the dark-tuned unfocused
   shadow read HEAVIER than light mode's focused one. */
body.theme-light.wm-multi .window-chrome:not(.window-chrome--focused) {
  box-shadow:
    0 6px 16px rgba(0, 0, 0, 0.10),
    0 0 0 1px rgba(var(--accent-rgb), 0.05),
    var(--inner-glow);
}

body.theme-light.wm-multi .window-chrome:not(.window-chrome--focused) .window-chrome__titlebar {
  filter: saturate(0.7) brightness(0.97);
}

/* ── Minimize animation ── */
.window-chrome--minimizing {
  transition: transform 0.2s var(--ease-out), opacity 0.2s var(--ease-out);
  transform: scale(0.92) translateY(48px);
  opacity: 0;
  pointer-events: none;
}

.window-chrome--minimized {
  display: none;
}

/* Minimize button is a multi-window affordance; hide it in compact
   mode where minimize/restore has no tray-first UX. */
body:not(.wm-multi) .window-chrome__btn-minimize {
  display: none;
}

/* ── Window tray (taskbar chips) ──
   A sibling of the app layer, not a child — the layer hides when
   every window is minimized and the tray is the recovery surface. */
.wm-tray {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(112px + var(--safe-bottom, 0px));
  z-index: var(--z-wm-tray);
  display: flex;
  gap: 8px;
  max-width: min(92vw, 720px);
  overflow-x: auto;
  padding: 6px;
  border-radius: var(--radius-lg);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

/* While a window is up, the tray auto-hides to a peek strip at the
   bottom edge — full-height (snapped/maximized) windows own that space,
   and an always-visible tray stole clicks from their bottom content.
   Hover or keyboard focus slides it back up. */
body.in-app .wm-tray {
  bottom: 0;
  transform: translate(-50%, calc(100% - 12px));
  opacity: 0.55;
  transition: transform 0.2s var(--ease-out), opacity 0.2s var(--ease-out);
}

body.in-app .wm-tray:hover,
body.in-app .wm-tray:focus-within {
  transform: translate(-50%, calc(-8px - var(--safe-bottom, 0px)));
  opacity: 1;
}

.wm-tray[hidden] {
  display: none;
}

.wm-chip {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  border-radius: var(--radius-md, 12px);
  background: var(--bg-glass);
  border: 1px solid var(--border-light);
  overflow: hidden;
}

.wm-chip.is-focused {
  border-color: var(--border-accent);
  box-shadow: var(--glow-sm);
}

.wm-chip.is-minimized .wm-chip-label {
  color: var(--text-dim);
}

.wm-chip-main {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 32px;
  padding: 0 6px 0 10px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-bright);
}

.wm-chip-main:hover {
  background: var(--accent-bg);
}

.wm-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: 0 0 auto;
}

.wm-chip.is-minimized .wm-chip-dot {
  background: none;
  border: 1px solid var(--text-dim);
}

.wm-chip-label {
  white-space: nowrap;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-bright);
}

.wm-chip-close {
  min-height: 32px;
  padding: 0 8px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  color: var(--text-dim);
}

.wm-chip-close:hover {
  color: var(--danger);
  background: var(--accent-subtle);
}

/* Focus Mode collapses the desktop — the tray must not float over it. */
body.focus-active .wm-tray {
  display: none;
}

/* Small screens: bigger touch targets, tray above the dock. */
@media (max-width: 767px) {
  .wm-chip-main { min-height: 44px; }
  .wm-chip-close { min-height: 44px; padding: 0 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .wm-scrim { animation: none; }
  .wm-snap-preview { transition: none; }
  .window-chrome--minimizing { transition: none; }
  body.in-app .wm-tray { transition: none; }
}