diff --git a/backend/internal/provider/grok/client.go b/backend/internal/provider/grok/client.go
index de1c18c..8fa695a 100644
--- a/backend/internal/provider/grok/client.go
+++ b/backend/internal/provider/grok/client.go
@@ -521,7 +521,7 @@ func parseStatsigCurves(html string) ([][]statsigCurve, error) {
 // serializes getComputedStyle(color)+getComputedStyle(transform) exactly as the
 // signer does (each number -> Number(v.toFixed(2)).toString(16), '.'/'-' stripped).
 func computeStatsigTail(seed []byte, curves [][]statsigCurve) (string, error) {
-	if len(seed) < 40 {
+	if len(seed) < 46 {
 		return "", errors.New("statsig: short seed")
 	}
 	if len(curves) == 0 {
@@ -531,13 +531,13 @@ func computeStatsigTail(seed []byte, curves [][]statsigCurve) (string, error) {
 	if len(curves[group]) == 0 {
 		return "", errors.New("statsig: empty curve group")
 	}
-	idx := int(seed[17]) % len(curves[group])
+	idx := int(seed[45]) % len(curves[group])
 	cv := curves[group][idx]
 	if len(cv.Color) < 6 || len(cv.Bezier) < 4 {
 		return "", errors.New("statsig: malformed curve")
 	}
 
-	n := (int(seed[19]) % 16) * (int(seed[15]) % 16) * (int(seed[39]) % 16)
+	n := (int(seed[1]) % 16) * (int(seed[6]) % 16) * (int(seed[13]) % 16)
 	currentTime := jsRound(float64(n)/10) * 10
 	progress := float64(currentTime) / statsigAnimDuration
 
@@ -558,7 +558,7 @@ func computeStatsigTail(seed []byte, curves [][]statsigCurve) (string, error) {
 		}
 		nums = append(nums, float64(v))
 	}
-	theta := jsRound(float64(cv.Deg)*300/255 + 60)
+	theta := int(math.Floor(float64(cv.Deg)*300/255 + 60))
 	rad := float64(theta) * eased * math.Pi / 180
 	cos, sin := math.Cos(rad), math.Sin(rad)
 	nums = append(nums, cos, sin, -sin, cos, 0, 0)