.app-window {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  width: min(760px, 92vw);
  min-width: 360px;
  min-height: 240px;
  background: var(--panel);
  border-top: 1px solid var(--window-frame-light);
  border-left: 1px solid var(--window-frame-light);
  border-right: 1px solid var(--window-frame-dark);
  border-bottom: 1px solid var(--window-frame-dark);
  box-shadow: 0 12px 26px var(--window-shadow);
  display: flex;
  flex-direction: column;
}

.app-window:focus {
  outline: none;
}

.app-window button:focus,
.app-window input:focus,
.app-window textarea:focus,
.app-window select:focus {
  outline: none;
  box-shadow: none;
}

.app-window button:focus-visible,
.app-window input:focus-visible,
.app-window textarea:focus-visible,
.app-window select:focus-visible {
  outline: 1px dotted var(--control-accent);
  outline-offset: 1px;
}

.app-window.dragging {
  user-select: none;
}

.app-window.dragging .window-titlebar {
  cursor: grabbing;
}

.hidden { display: none !important; }

.window-titlebar {
  background: linear-gradient(var(--titlebar-1), var(--titlebar-2));
  color: var(--color-white);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 5px 6px;
  border-bottom: 1px solid var(--titlebar-border);
  text-shadow: 0 1px 0 var(--overlay-strong);
}

.window-title {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.window-title::before {
  content: "▣";
  font-size: 11px;
  color: var(--window-title-glyph);
}

.window-controls {
  display: inline-flex;
  gap: 3px;
}

.window-minimize,
.window-maximize,
.window-close {
  width: 24px;
  height: 20px;
  border-top: 1px solid var(--winctrl-border-light, var(--surface-soft-hover));
  border-left: 1px solid var(--winctrl-border-light, var(--surface-soft-hover));
  border-right: 1px solid var(--winctrl-border-dark, var(--text-secondary));
  border-bottom: 1px solid var(--winctrl-border-dark, var(--text-secondary));
  background: linear-gradient(var(--winctrl-top), var(--winctrl-bottom));
  color: var(--winctrl-text, var(--ui-btn-text));
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  border-radius: 2px;
  box-shadow: inset 0 1px 0 var(--winctrl-gloss, rgba(255,255,255,0.35));
}

.window-minimize:hover,
.window-maximize:hover {
  background: linear-gradient(var(--winctrl-hover-top, var(--winctrl-top)), var(--winctrl-hover-bottom, var(--winctrl-bottom)));
}

.window-close {
  background: linear-gradient(var(--winctrl-close-top, #b95f6e), var(--winctrl-close-bottom, #823a45));
  color: var(--winctrl-close-text, #f8fbff);
  border-top-color: var(--winctrl-close-border-light, rgba(255,255,255,0.55));
  border-left-color: var(--winctrl-close-border-light, rgba(255,255,255,0.55));
  border-right-color: var(--winctrl-close-border-dark, rgba(0,0,0,0.45));
  border-bottom-color: var(--winctrl-close-border-dark, rgba(0,0,0,0.45));
}

.window-close:hover {
  background: linear-gradient(var(--winctrl-close-hover-top, #ce6b7b), var(--winctrl-close-hover-bottom, #984552));
}

.window-minimize:active,
.window-maximize:active,
.window-close:active {
  border-top-color: var(--winctrl-border-dark, var(--text-secondary));
  border-left-color: var(--winctrl-border-dark, var(--text-secondary));
  border-right-color: var(--winctrl-border-light, var(--surface-soft-hover));
  border-bottom-color: var(--winctrl-border-light, var(--surface-soft-hover));
  transform: translateY(1px);
}

.app-window.maximized {
  border-radius: 0;
}

.app-window.maximized .window-resize-handle {
  display: none;
}

.window-content {
  margin: 4px;
  padding: 12px;
  flex: 1;
  min-height: 0;
  overflow: auto;
  background: var(--surface-window, var(--color-white));
  border-top: 1px solid var(--content-inset-dark);
  border-left: 1px solid var(--content-inset-dark);
  border-right: 1px solid var(--content-inset-light);
  border-bottom: 1px solid var(--content-inset-light);
}

.window-resize-handle {
  position: absolute;
  width: 14px;
  height: 14px;
  right: 1px;
  bottom: 1px;
  cursor: nwse-resize;
  background:
    linear-gradient(135deg, transparent 0 40%, var(--accent-stroke) 40% 46%, transparent 46% 56%, var(--accent-stroke) 56% 62%, transparent 62% 72%, var(--accent-stroke) 72% 78%, transparent 78% 100%);
}

.app-window.resizing {
  user-select: none;
}

#selection-box {
  position: absolute;
  box-sizing: border-box;
  border: 1px solid rgba(60, 140, 255, 0.95);
  outline: 1px solid rgba(255, 255, 255, 0.65);
  outline-offset: -2px;
  background: rgba(130, 200, 255, 0.28);
  background: var(--selection-fill, rgba(130, 200, 255, 0.28));
  pointer-events: none;
  z-index: 120;
}

/* Title bar app icon + SVG caption glyphs (window-manager.js / window-chrome.js) */
.window-icon {
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  object-fit: contain;
  font-size: 12px;
  line-height: 16px;
  text-align: center;
}

.has-window-icon .window-title::before {
  display: none;
}

.window-title {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  display: block;
}

.window-minimize,
.window-maximize,
.window-close {
  display: inline-grid;
  place-items: center;
}

.caption-glyph {
  width: 10px;
  height: 10px;
  fill: currentColor;
  pointer-events: none;
}

.caption-glyph-close {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: square;
}