Wait, I need to double-check the RTL alignment. The HTML has `dir="rtl"`. In Flexbox with `dir="rtl"`: - `flex-start` is on the right - `flex-end` is on the left For iOS Messages: - Outgoing (own) messages are on the right side of the screen (from viewer's perspective) - Incoming (others) are on the left side of the screen But in RTL languages, does iOS flip this? Actually, yes, iOS interfaces flip in RTL. So: - In LTR: Own = Right (flex-end), Others = Left (flex-start) - In RTL: Own = Left (flex-end), Others = Right (flex-start) So `align-self: flex-end` for own messages works correctly for both directions! Because in RTL, flex-end is the left side, which is where own messages should be. And `align-self: flex-start` for others puts them on the right side in RTL. So my CSS is correct: - `.message.own { align-self: flex-end; }` - `.message:not(.own) { align-self: flex-start; }` Also for the bubble tails: - In LTR: Own has tail on bottom-right (border-radius: 20px 20px 4px 20px) - In RTL: Own should have tail on bottom-left (border-radius: 20px 20px 20px 4px) - In LTR: Others have tail on bottom-left (border-radius: 20px 20px 20px 4px) - In RTL: Others should have tail on bottom-right (border-radius: 20px 20px 4px 20px) Since the HTML is RTL, I should set: - Own: `border-radius: 20px 20px 20px 4px` (tail left) - Others: `border-radius: 20px 20px 4px 20px` (tail right) But wait, looking at my code above, I had: - Own: `border-radius: 20px 20px 20px 4px` (correct for RTL) - Others: `border-radius: 20px 20px 4px 20px` (correct for RTL) Yes, that's correct. One more thing: The user said "Do NOT modify the HTML structure" and "Output only the styling code (CSS)". So I should provide only the CSS content, wrapped in `