Fix kicked ball launching from golfer's back foot at narrow viewports
Wrap golfer+ball in a positioned container so the ball is absolutely anchored to the golfer's front foot, independent of inline flow/viewport. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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@ -16,7 +16,7 @@
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<!-- Lobby Screen -->
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<div id="lobby-screen" class="screen active">
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<h1><span class="logo-row"><img src="golfball-logo.svg" alt="" class="golfball-logo"><span class="golfer-swing">🏌️</span><span class="kicked-ball">⚪</span></span> <span class="golf-title">GolfCards<span class="golf-title-tld">.club</span></span></h1>
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<h1><span class="logo-row"><img src="golfball-logo.svg" alt="" class="golfball-logo"><span class="golfer-container"><span class="golfer-swing">🏌️</span><span class="kicked-ball">⚪</span></span></span> <span class="golf-title">GolfCards<span class="golf-title-tld">.club</span></span></h1>
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<p class="subtitle">6-Card Golf Card Game <button id="rules-btn" class="btn btn-small btn-rules">Rules</button> <button id="leaderboard-btn" class="btn btn-small leaderboard-btn">Leaderboard</button></p>
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<div class="alpha-banner">Beta Testing - Bear with us while, stuff.</div>
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@ -143,6 +143,12 @@ body {
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}
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}
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/* Golfer + ball container */
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.golfer-container {
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position: relative;
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display: inline-block;
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}
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/* Golfer swing animation */
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.golfer-swing {
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display: inline-block;
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@ -181,44 +187,46 @@ body {
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.kicked-ball {
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display: inline-block;
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font-size: 0.2em;
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position: relative;
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position: absolute;
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right: -8px;
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bottom: 30%;
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opacity: 0;
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animation: ball-kicked 0.7s linear forwards;
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animation-delay: 0.72s;
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}
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/* Trajectory: y = 0.0124x² - 1.42x (parabola with peak at x=57) */
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/* Trajectory: parabolic arc from golfer's front foot, up and to the right */
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@keyframes ball-kicked {
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0% {
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transform: translate(-12px, 8px) scale(1);
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transform: translate(0, 0) scale(1);
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opacity: 1;
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}
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15% {
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transform: translate(8px, -16px) scale(1);
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transform: translate(20px, -24px) scale(1);
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opacity: 1;
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}
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30% {
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transform: translate(28px, -31px) scale(1);
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transform: translate(40px, -39px) scale(1);
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opacity: 1;
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}
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45% {
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transform: translate(48px, -38px) scale(0.95);
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transform: translate(60px, -46px) scale(0.95);
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opacity: 1;
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}
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55% {
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transform: translate(63px, -38px) scale(0.9);
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transform: translate(75px, -46px) scale(0.9);
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opacity: 1;
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}
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70% {
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transform: translate(83px, -27px) scale(0.85);
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transform: translate(95px, -35px) scale(0.85);
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opacity: 0.9;
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}
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85% {
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transform: translate(103px, -6px) scale(0.75);
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transform: translate(115px, -14px) scale(0.75);
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opacity: 0.6;
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}
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100% {
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transform: translate(118px, 25px) scale(0.65);
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transform: translate(130px, 17px) scale(0.65);
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opacity: 0;
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}
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}
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81
docs/BUG-kicked-ball-position.md
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81
docs/BUG-kicked-ball-position.md
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# BUG: Kicked ball animation starts from golfer's back foot
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## Problem
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The `⚪` kicked ball animation (`.kicked-ball`) appears to launch from the golfer's **back foot** (left side) instead of the **front foot** (right side). The golfer faces right in both landscape (two-row) and mobile (single-line) views due to `scaleX(-1)`.
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## What we want
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The ball should appear at the golfer's front foot (right side) and arc up and to the right — matching the "good" landscape behavior seen at wide desktop widths (~1100px+).
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## Good reference
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- Video: `good.mp4` (landscape wide view)
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- Extracted frames: `/tmp/golf-frames-good/`
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- Frame 025: Ball clearly appears to the RIGHT of the golfer, arcing up-right
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## Bad behavior
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- Videos: `Screencast_20260224_005555.mp4`, `Screencast_20260224_013326.mp4`
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- The ball appears to the LEFT of the golfer (between the golf ball logo and golfer emoji)
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- Happens at the user's phone viewport width (two-row layout, inline-grid)
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## Root cause analysis
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### The scaleX(-1) offset problem
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The golfer emoji (`.golfer-swing`) has `transform: scaleX(-1)` which flips it visually. This means:
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- The golfer's **layout box** occupies the same inline flow position
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- But the **visual** left/right is flipped — the front foot (visually on the right) is at the LEFT edge of the layout box
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- The `.kicked-ball` span comes right after `.golfer-swing` in inline flow, so its natural position is at the **right edge** of the golfer's layout box
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- But due to `scaleX(-1)`, the right edge of the layout box is the golfer's **visual back** (left side)
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- So `translate(0, 0)` places the ball at the golfer's back, not front
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### CSS translate values tested
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| Start X | Result |
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|---------|--------|
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| `-30px` (original) | Ball appears way behind golfer (further left) |
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| `+20px` | Ball still appears to LEFT of golfer, but slightly closer |
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| `+80px` | Not confirmed (staging 404 during test) |
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### Key finding: The kicked-ball's natural position needs ~60-80px positive X offset to reach the golfer's visual front foot
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The golfer emoji is roughly 30-40px wide at this viewport. Since `scaleX(-1)` flips the visual, the ball needs to translate **past the entire emoji width** to reach the visual front.
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### Media query issues encountered
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1. First attempt: Added `ball-kicked-mobile` keyframes with `@media (max-width: 500px)` override
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2. **CSS source order bug**: The mobile override at line 144 was being overridden by the base `.kicked-ball` rule at line 216 (later = higher priority at equal specificity)
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3. Moved override after base rule — still didn't work
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4. Added `!important` — still didn't work
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5. Raised breakpoint from 500px to 768px, then 1200px — still no visible change
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6. **Breakthrough**: Added `outline: 3px solid red; background: yellow` debug styles to base `.kicked-ball` — these DID appear, confirming CSS was loading
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7. Changed base `ball-kicked` keyframes from `-30px` to `+20px` — ball DID move, confirming the base keyframes are what's being used
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8. The mobile override keyframes may never have been applied (unclear if `ball-kicked-mobile` was actually used)
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### What the Chrome extension Claude analysis said
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> "The breakpoint is 500px, but the viewport is above 500px. At 700px+, ball-kicked-mobile never kicks in — it still uses the desktop ball-kicked animation. But the layout at this width has already shifted to a more centered layout which changes where .kicked-ball is positioned relative to the golfer."
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## Suggested fix approach
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1. **Don't use separate mobile keyframes** — just fix the base `ball-kicked` to work at all viewport widths
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2. The starting X needs to be **much larger positive** (60-80px) to account for `scaleX(-1)` placing the natural position at the golfer's visual back
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3. Alternatively, restructure the HTML: move `.kicked-ball` BEFORE `.golfer-swing` in the DOM, so its natural inline position is at the golfer's visual front (since scaleX(-1) flips left/right)
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4. Or use `position: absolute` on `.kicked-ball` and position it relative to the golfer container explicitly
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## Files involved
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- `client/style.css` — `.kicked-ball`, `@keyframes ball-kicked`, `.golfer-swing`
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- `client/index.html` — line 19: `<span class="golfer-swing">🏌️</span><span class="kicked-ball">⚪</span>`
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## Current state (reverted to clean)
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All debug styles removed. Base keyframes restored to original `translate(-30px, 8px)` start. No mobile override keyframes. The bug still exists but the code is clean.
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## Extracted frames for reference
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- `/tmp/golf-frames-good/` — good landscape behavior (from `good.mp4`)
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- `/tmp/golf-frames-bad/` — bad behavior (from old video)
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- `/tmp/golf-frames-new/` — debug session with red outline (from `Screencast_20260224_013326.mp4`)
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