diff --git a/src-tauri/src/thumbbar.rs b/src-tauri/src/thumbbar.rs
index 6a93811..a5573c0 100644
--- a/src-tauri/src/thumbbar.rs
+++ b/src-tauri/src/thumbbar.rs
@@ -252,12 +252,20 @@ mod imp {
             SIZING_LATCH.store(true, Ordering::Relaxed);
         } else if msg == WM_ENTERSIZEMOVE {
             IN_MODAL.store(true, Ordering::Relaxed);
-            // DWM suspends the ACRYLIC accent for the whole modal loop but
-            // keeps compositing the plain BLURBEHIND one, so the window swaps
+            // DWM suspends the ACRYLIC accent inside a live RESIZE loop but
+            // keeps compositing the plain BLURBEHIND one, so a resize swaps
             // down to Blur for the gesture instead of going see-through.
-            // Every modal loop gets this — move drags included, since a
-            // suspended acrylic punches through on those exactly the same.
-            if GLASS_ON.load(Ordering::Relaxed) {
+            // A MOVE loop is different: DWM composites the acrylic straight
+            // through one — measured 2026-08-31 on this machine, stationary
+            // and at mouse-speed motion over a striped backdrop — while the
+            // Blur fallback ignores the gradient tint and skips the acrylic
+            // dimming, landing ~15% brighter over a bright backdrop. That
+            // brightness step for the whole of every titlebar drag is what
+            // "the window gets light when I drag it" was. So only a latched
+            // RESIZE parks the accent at Blur; a move keeps the acrylic. If
+            // the latch ever misses a real resize, the WM_SIZING arm below
+            // swaps the accent one mouse-move later.
+            if GLASS_ON.load(Ordering::Relaxed) && SIZING_LATCH.load(Ordering::Relaxed) {
                 let _ = apply_accent(hwnd.0, Accent::Blur);
             }
             // Arm on the LOOP, not on WM_SIZING. Press a border and hold still
@@ -279,6 +287,12 @@ mod imp {
             // cannot arm on a move. It arms one mouse-move later than the
             // latch does, which is why the latch is still the primary.
             if !IN_SIZE_DRAG.swap(true, Ordering::Relaxed) {
+                // The latch missed, so ENTERSIZEMOVE kept the acrylic; a
+                // WM_SIZING is proof this loop is a resize after all, so the
+                // accent parks at Blur here instead.
+                if GLASS_ON.load(Ordering::Relaxed) {
+                    let _ = apply_accent(hwnd.0, Accent::Blur);
+                }
                 unsafe {
                     let _ = PostMessageW(Some(hwnd), WM_RESIZE_DRAG, WPARAM(1), LPARAM(0));
                 }
diff --git a/src/lib/glass.js b/src/lib/glass.js
index fa99c32..b8a712d 100644
--- a/src/lib/glass.js
+++ b/src/lib/glass.js
@@ -43,11 +43,15 @@ export function applyGlass(on) {
  *
  * HOW GLASS SURVIVES A GESTURE (2026-08-28, three layers, Rust-first):
  *
- * 1. Modal move/size loops (border drags, titlebar drags): the subclass in
- *    src-tauri/src/thumbbar.rs swaps the accent from ACRYLIC down to plain
- *    BLURBEHIND for the length of the loop and back on release. DWM
- *    suspends the acrylic inside the loop but keeps compositing the plain
- *    blur, so the window stays glassy instead of see-through or black.
+ * 1. Modal move/size loops: the subclass in src-tauri/src/thumbbar.rs parks
+ *    the accent at plain BLURBEHIND for the length of a RESIZE loop and puts
+ *    ACRYLIC back on release — DWM suspends the acrylic inside a live resize
+ *    but keeps compositing the plain blur, so the window stays glassy
+ *    instead of see-through or black. A titlebar MOVE loop keeps the
+ *    acrylic: DWM composites it clean through one (measured 2026-08-31,
+ *    stationary and at mouse speed), and the plain blur it would swap to is
+ *    ~15% brighter over a bright backdrop — that step, held for the whole of
+ *    every drag, was Kyle's "the window gets light when I drag it".
  *
  * 2. Discrete jumps (maximize, restore, snap, DPI): the DWM zoom animation
  *    scales a SNAPSHOT of the window, not the window — the accent visual