.workspaces-viewport {
  position: absolute;
  top: var(--panel-height);
  left: 0;
  right: 0;
  bottom: 76px;
  overflow: hidden;
  z-index: 1;
}

.workspaces-strip {
  display: flex;
  width: 400%;
  height: 100%;
  transition: transform 250ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.workspace-sheet {
  width: 25%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.windows-container {
  position: absolute;
  inset: 0;
}


.os-window {
  position: absolute;
  background: var(--window);
  -webkit-backdrop-filter: blur(28px) saturate(1.7);
  backdrop-filter: blur(28px) saturate(1.7);
  border: 1px solid rgba(140, 180, 255, 0.28);
  border-radius: var(--radius-win);
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.55),
    0 0 48px rgba(130, 184, 255, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 320px;
  min-height: 200px;
  animation: win-open 150ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform, opacity;
}

@keyframes win-open {
  from {
    transform: scale(0.96);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.os-window.closing {
  animation: win-close 120ms ease-in forwards;
  pointer-events: none;
}

@keyframes win-close {
  from {
    transform: scale(1);
    opacity: 1;
  }
  to {
    transform: scale(0.95);
    opacity: 0;
  }
}

.os-window.minimized {
  opacity: 0 !important;
  transform: translateY(8px) scale(0.98) !important;
  pointer-events: none !important;
  transition: opacity 150ms ease, transform 150ms ease;
}

.os-window.maximized {
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  border-radius: 0 !important;
  border: none !important;
}

/* true fullscreen: when a window is maximized the workspace viewport fills
   the whole screen behind the (auto-hidden) taskbar */
body.has-maximized .workspaces-viewport {
  bottom: 0;
}

/* aero snap halves */
.os-window.snapped-left {
  top: 0 !important;
  left: 0 !important;
  width: 50% !important;
  height: 100% !important;
  border-radius: 0 !important;
}

.os-window.snapped-right {
  top: 0 !important;
  left: 50% !important;
  width: 50% !important;
  height: 100% !important;
  border-radius: 0 !important;
}

/* aero snap drop preview */
.snap-preview {
  position: absolute;
  background: rgba(130, 184, 255, 0.16);
  border: 2px solid rgba(130, 184, 255, 0.55);
  border-radius: 14px;
  pointer-events: none;
  z-index: 5;
  transition: left 120ms ease, top 120ms ease, width 120ms ease, height 120ms ease;
}

.snap-preview.hidden {
  display: none;
}

.os-window.active {
  border-color: rgba(150, 195, 255, 0.55);
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.55),
    0 0 64px rgba(130, 184, 255, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.14);
}

.win-titlebar {
  height: 36px;
  min-height: 36px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.01));
  border-bottom: 1px solid rgba(140, 180, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  cursor: grab;
  user-select: none;
}

.win-titlebar:active {
  cursor: grabbing;
}

.win-title-left {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}

.win-icon {
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.win-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.win-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.win-btn {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dim);
  transition: background 100ms ease, color 100ms ease;
}

.win-btn:hover {
  background: var(--accent-soft);
  color: var(--text);
}

.win-btn.close:hover {
  background: rgba(224, 108, 117, 0.2);
  color: #e06c75;
}

/* Window Content Body */
.win-body {
  flex: 1;
  overflow: auto;
  position: relative;
  background: rgba(4, 7, 14, 0.12);
}

/* Corner Resize Handle */
.win-resize-grip {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 14px;
  height: 14px;
  cursor: se-resize;
  z-index: 100;
}

.win-resize-grip::after {
  content: '';
  position: absolute;
  right: 3px;
  bottom: 3px;
  width: 5px;
  height: 5px;
  border-right: 1.5px solid var(--dim);
  border-bottom: 1.5px solid var(--dim);
  opacity: 0.5;
}

/* Alt+Tab Overlay */
.alttab-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.alttab-box {
  background: var(--window);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  backdrop-filter: blur(24px) saturate(1.5);
  border: 1px solid rgba(140, 180, 255, 0.22);
  border-radius: var(--radius-win);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 44px rgba(130, 184, 255, 0.10);
  padding: 16px;
  min-width: 340px;
  max-width: 600px;
}

.alttab-header {
  font-size: 11px;
  font-weight: 600;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  text-align: center;
}

.alttab-list {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.alttab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-radius: var(--radius-ctrl);
  border: 1px solid transparent;
  min-width: 80px;
  transition: all 100ms ease;
}

.alttab-item.selected {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.alttab-item-icon {
  color: var(--accent);
}

.alttab-item-title {
  font-size: 11px;
  color: var(--text);
  max-width: 80px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}