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Improve composer glass fallbacks #4406

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Merged
juliusmarminge merged 1 commit into from
Jul 23, 2026
+34 −1
Merged

Improve composer glass fallbacks #4406

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35 changes: 34 additions & 1 deletion apps/web/src/index.css
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Original file line number Diff line number Diff line change
Expand Up @@ -453,6 +453,10 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
inset: 0;
border: 1px solid var(--chat-composer-outline);
border-radius: inherit;
content: "";
}

.chat-composer-glass-shell-with-context .chat-composer-glass-host::after {
/* Keep the attachment seam open; the strip continues the outer outline below. */
clip-path: polygon(
0 0,
Expand All @@ -464,7 +468,6 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
22px 100%,
0 100%
);
content: "";
}

.chat-composer-context-strip {
Expand Down Expand Up @@ -512,6 +515,36 @@ html[data-mobile-composer-route-transition="true"]::view-transition-old(t3-mobil
box-shadow: 0 14px 32px -18px rgb(0 0 0 / 75%);
}

@supports not (clip-path: shape(from 0 0, line to 1px 1px)) {
.chat-composer-glass-shell-with-context::before {
inset-block-end: var(--chat-composer-context-extension);
border-radius: 22px;
clip-path: none;
}

.chat-composer-context-strip::before {
background: color-mix(
in srgb,
var(--chat-composer-glass-surface) var(--glass-opacity),
transparent
);
-webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturation));
}

.dark .chat-composer-context-strip::before {
background:
linear-gradient(
to bottom,
transparent 0 1rem,
rgb(0 0 0 / 18%) 1rem,
transparent calc(1rem + 10px)
),
linear-gradient(rgb(255 255 255 / 2%), rgb(255 255 255 / 2%)),
color-mix(in srgb, var(--chat-composer-glass-surface) var(--glass-opacity), transparent);
}
}

@cursor cursor Bot Jul 23, 2026

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Shape fallback leaves composer notch

Medium Severity

The @supports not (clip-path: shape(...)) block restores separate rounded glass for the shell and context strip, but .chat-composer-glass-shell-with-context .chat-composer-glass-host::after still applies its clip-path polygon notch. Browsers without shape() therefore keep a cut-out composer bottom outline instead of a complete border matching the stated two-panel fallback.

Additional Locations (1)
Fix in Cursor Fix in Web

Reviewed by Cursor Bugbot for commit bf724ed. Configure here.


.alert-glass {
--alert-glass-tint: transparent;

Expand Down
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