/* ============================================================
   29 · FLOATING PANELS & TOOLBARS
   ------------------------------------------------------------
   Detached surfaces that hover over a host stage — a tear-off
   panel, a floating toolbar pill, an inspector ripped out of a
   dock. Host positions them via left/top in inline style; drag
   handlers add the `dcs--dragging` state hook to raise elevation
   while pointer drag is active.

   These are the building blocks for tear-off / re-dock chrome.
   The actual drag-to-move behaviour is wired by decius.js when an
   element inside a floating surface has [data-dcs-drag-handle].
   ============================================================ */

/* ---- detached panel ----------------------------------------- */
.dcs-panel--floating {
  position: absolute;                /* host positions via left/top */
  min-width: 160px;
  background: var(--dcs-bg);
  border: 1px solid var(--dcs-line);
  border-radius: var(--dcs-r-4);
  box-shadow: var(--dcs-shadow-pop);
  overflow: hidden;
  z-index: 60;
}
.dcs-panel--floating > .dcs-panel__header {
  cursor: grab;
  background: var(--dcs-surface-2);
  border-bottom: 1px solid var(--dcs-line);
  user-select: none;
}
.dcs-panel--floating.dcs--dragging > .dcs-panel__header { cursor: grabbing; }
.dcs-panel--floating > .dcs-panel__header .dcs-panel__title { pointer-events: none; }

/* A floating panel that wraps a dockpane (tear-off of a tab group)
   uses the tab strip itself as the drag handle — both the wrapped
   `__tabbar` form AND the bare `__tabs` form (Photo's tearoffs skip
   the tabbar wrapper). Any empty area in the strip — the spacer
   between the last tab and the hamburger, padding around tabs —
   shows the grab cursor so users see it's draggable. Individual
   tabs / the hamburger button restore their own pointer cursors. */
.dcs-panel--floating > .dcs-dockpane > .dcs-dockpane__tabbar,
.dcs-panel--floating > .dcs-dockpane > .dcs-dockpane__tabs,
.dcs-panel--floating > .dcs-dockpane__tabbar,
.dcs-panel--floating > .dcs-dockpane__tabs { cursor: grab; user-select: none; }
.dcs-panel--floating.dcs--dragging > .dcs-dockpane > .dcs-dockpane__tabbar,
.dcs-panel--floating.dcs--dragging > .dcs-dockpane > .dcs-dockpane__tabs,
.dcs-panel--floating.dcs--dragging > .dcs-dockpane__tabbar,
.dcs-panel--floating.dcs--dragging > .dcs-dockpane__tabs { cursor: grabbing; }

/* ---- detached toolbar -------------------------------------- */
/* Extends the minimal _15 floating toolbar rule with absolute
   positioning, intrinsic sizing, and the same shadow as panels. */
.dcs-toolbar.dcs-toolbar--floating {
  position: absolute;                /* host positions via left/top */
  height: auto;
  width: auto;
  border: 1px solid var(--dcs-line-soft);
  border-radius: var(--dcs-r-4);
  box-shadow: var(--dcs-shadow-pop);
  background: var(--dcs-surface-1);
  padding: var(--dcs-s-2);
  gap: var(--dcs-s-1);
  z-index: 60;
}
.dcs-toolbar--floating.dcs-toolbar--v { padding: var(--dcs-s-2); }

/* ---- shared elevation while dragging ------------------------ */
.dcs--dragging {
  box-shadow: var(--dcs-shadow-3), 0 0 0 1px var(--dcs-accent-haze) !important;
}

/* ---- floating-panel resize: any edge or corner --------------
   Eight invisible hit zones around the panel perimeter handle the
   actual pointer events; each just sets the matching native resize
   cursor. The visible SE grip is a decorative affordance only
   (pointer-events: none, z-index: 1) so anything above — scrollbar
   thumb, content overflow, badges — draws over it cleanly. */
.dcs-panel__resize-zones {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}
.dcs-panel__resize-zone {
  position: absolute;
  pointer-events: auto;
  background: transparent;
}
/* Edges — 5px wide strips along each side. */
.dcs-panel__resize-zone--n { top: 0; left: 0; right: 0; height: 5px; cursor: ns-resize; }
.dcs-panel__resize-zone--s { bottom: 0; left: 0; right: 0; height: 5px; cursor: ns-resize; }
.dcs-panel__resize-zone--w { top: 0; left: 0; bottom: 0; width: 5px; cursor: ew-resize; }
.dcs-panel__resize-zone--e { top: 0; right: 0; bottom: 0; width: 5px; cursor: ew-resize; }
/* Corners — 12px squares; overlap the edge zones so the diagonal
   cursor wins at the four corners. */
.dcs-panel__resize-zone--nw { top: 0; left: 0; width: 12px; height: 12px; cursor: nwse-resize; }
.dcs-panel__resize-zone--ne { top: 0; right: 0; width: 12px; height: 12px; cursor: nesw-resize; }
.dcs-panel__resize-zone--sw { bottom: 0; left: 0; width: 12px; height: 12px; cursor: nesw-resize; }
.dcs-panel__resize-zone--se { bottom: 0; right: 0; width: 12px; height: 12px; cursor: nwse-resize; }

/* Decorative SE grip — visual only. Bottom of the z-stack so scrollbars
   and overflowing content overlay it naturally. Hit zones above handle
   the actual pointer. */
.dcs-panel__resize {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 14px;
  height: 14px;
  z-index: 1;
  pointer-events: none;
  color: var(--dcs-line-strong);
  opacity: .6;
  transition: opacity var(--dcs-t-fast);
}
.dcs-panel--floating:hover .dcs-panel__resize { opacity: 1; }
.dcs-panel__resize::after {
  content: "";
  position: absolute;
  right: 3px;
  bottom: 3px;
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  border-bottom-right-radius: 2px;
}

/* ---- reusable drag-handle grip ------------------------------
   A dotted "drag from here" texture that tiles cleanly to whatever
   space the grippable area gives it. Two knobs:
     • `--dcs-grip-unit`  — pattern grid (one dot per cell). Defaults
       to 4px so 3-up / 4-up grids feel natural.
     • `--dcs-grip-thick` — the short-axis thickness (perpendicular
       to the drag direction). Defaults to 12px.
   `background-repeat: round` makes the browser slightly re-tune the
   tile size so a whole number of dots fits — no clipped half-dots at
   the edges, regardless of the host bar's measure.
   Orientation: `.dcs-grip` is the default VERTICAL strip (narrow in
   width, stretches in height — sits at the start of a horizontal
   bar). `.dcs-grip--h` is the HORIZONTAL strip (narrow in height,
   stretches in width — sits at the start of a vertical bar). Both
   default to `align-self: stretch` so a single flex item fills the
   bar's cross axis without further CSS. */
.dcs-grip {
  --dcs-grip-unit: 4px;
  --dcs-grip-thick: 16px;
  flex: none;
  align-self: stretch;
  width: var(--dcs-grip-thick);
  min-height: var(--dcs-grip-thick);
  /* Small separator gap between the grip and the first toolbar item
     so the handle reads as a distinct affordance rather than as
     another tool slot. */
  margin-right: var(--dcs-s-2);
  color: var(--dcs-line-strong);
  /* Slightly inset surface, then two stacked radial gradients per cell:
     a top-left highlight + a crisp dot face. The hard transition
     (currentColor → transparent at 90%/100%) gives a near-pixel edge so
     each dot reads as a small RAISED bead — not the soft anti-aliased
     circles we had before. `repeat` (not `round`) leaves the tile size
     fixed so dots stay perfectly square; we intentionally don't clip the
     box with a border-radius so corner dots stay whole. */
  background-color: rgba(0, 0, 0, .18);
  background-image:
    radial-gradient(closest-side at 35% 30%, rgba(255, 255, 255, .35) 55%, transparent 85%),
    radial-gradient(closest-side, currentColor 88%, transparent 100%);
  background-size: var(--dcs-grip-unit) var(--dcs-grip-unit);
  background-position: 0 0;
  background-repeat: repeat;
  cursor: grab;
  transition: color var(--dcs-t-fast);
  user-select: none;
}
.dcs-grip:hover { color: var(--dcs-text-mute); }
.dcs-grip--h {
  width: auto;
  height: var(--dcs-grip-thick);
  min-width: var(--dcs-grip-thick);
  min-height: 0;
  /* Horizontal grip sits at the START of a column-flex toolbar, so
     the separator gap goes UNDER it instead of to the right. */
  margin-right: 0;
  margin-bottom: var(--dcs-s-2);
}
.dcs--dragging .dcs-grip { cursor: grabbing; }

/* Floating vertical toolbar with a first-child grip: a narrow band
   spanning LEFT→RIGHT across the top of the toolbar. The short axis is
   pinned to exactly 3 dot cells (3 × 4px = 12px) so the dot pattern
   tiles cleanly vertically. The long axis stretches, with `background-
   repeat: round` on X so the browser auto-fits an integer number of
   cells across — no half-dots clipped at the rect edges. Pattern
   anchored at (0,0) so the first cell is flush with the top-left. */
.dcs-toolbar--v.dcs-toolbar--floating > .dcs-grip:first-child {
  align-self: stretch;
  width: auto;
  height: 12px;                                      /* 3 rows × 4px */
  min-height: 0;
  margin: var(--dcs-s-2);                            /* inset on all sides */
  border-radius: 0;
  background-position: 0 0;
  background-repeat: round repeat;                   /* X auto-fit, Y exact */
}

/* Floating HORIZONTAL toolbar with a first-child grip: the symmetric
   case — a narrow band running TOP→BOTTOM down the left. 3 dot cells
   wide (12px), height stretches with `background-repeat: repeat round`
   so an integer number of cells fits the long axis. */
.dcs-toolbar--floating:not(.dcs-toolbar--v) > .dcs-grip:first-child {
  align-self: stretch;
  width: 12px;                                       /* 3 cols × 4px */
  height: auto;
  min-height: 0;
  margin: var(--dcs-s-2);                            /* inset on all sides */
  border-radius: 0;
  background-position: 0 0;
  background-repeat: repeat round;                   /* X exact, Y auto-fit */
}