simonandClaude Opus 5
bb5f87ff05
The video frame plays the paddle: it slides along the bottom of the screen and nowhere else, a square ball runs the diagonals off the walls, and every ball that gets past the frame puts one on a seven-segment counter in the top right. The frame is solid on all four sides, not just its face, so a ball that comes at its flank or up under it is turned away too. Which side a hit came in on is read from where the ball was before the step, with a shallowest-penetration fallback for the frame sliding into the ball rather than the other way round — without that the ball tunnels in and rattles inside the frame. The face keeps the original's angle rule, where the hit position sets the departure angle, so rallies develop instead of the ball retracing one line; the other three sides are plain reflections. The paddle steers by predictLanding, which unfolds the wall reflections analytically instead of simulating them. A paddle that outruns the ball never loses, so PONG_MISS_CHANCE of the time it aims a width wide and lets one through — otherwise the counter would sit on 00 all night. The digits are SVG polygons built from a segment map, so the era-correct display costs no font file. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01H9v2Xoa6eoeGYpK6gp95k9
320 lines
6.7 KiB
CSS
320 lines
6.7 KiB
CSS
:root {
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--accent: #ff4fc3;
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--ink: #14060f;
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}
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* {
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box-sizing: border-box;
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}
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html,
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body {
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margin: 0;
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height: 100%;
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overflow: hidden;
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background: var(--ink);
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font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
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cursor: none;
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}
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/* --- background ------------------------------------------------------- */
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#backgrounds {
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position: fixed;
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inset: 0;
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}
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#backgrounds img {
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position: absolute;
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inset: 0;
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width: 100%;
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height: 100%;
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object-fit: cover;
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opacity: 0;
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transition: opacity 900ms ease;
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/* Knock the poster back so the video frame stays the focal point — the
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posters are pale and read far brighter on a projector than on a desk. */
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filter: brightness(0.45) saturate(1.15);
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}
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#backgrounds img.active {
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opacity: 1;
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}
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/* Built and removed by the wash animation. Sits between the poster and the
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stills, and blends rather than covers, so the poster stays legible through
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whatever colour is passing over it. The gradient itself is written per frame
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from JS. */
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#wash {
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position: fixed;
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inset: 0;
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z-index: 0;
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pointer-events: none;
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/* Takes the poster's luminance and only replaces its hue, so the wash reads
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as a colour change rather than as a sheet of colour laid over the top. */
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mix-blend-mode: color;
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}
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/* --- frozen screenshots ------------------------------------------------ */
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#stills {
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position: fixed;
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inset: 0;
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pointer-events: none;
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z-index: 1;
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}
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#stills img {
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position: absolute;
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top: 0;
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left: 0;
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object-fit: cover;
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opacity: 0;
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/* Matches #frameSkin, so a still reads as a frozen copy of the frame. */
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border-radius: 10px;
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border: 2px solid rgba(255, 255, 255, 0.85);
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box-shadow:
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0 0 0 4px rgba(255, 79, 195, 0.55),
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0 24px 70px rgba(0, 0, 0, 0.7);
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transition: opacity 500ms ease;
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will-change: transform;
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}
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#stills img.visible {
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opacity: 1;
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}
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/* The trail ramps opacity frame-by-frame as a still ages, so the CSS transition
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above would only fight it. */
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#stills img.trail {
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transition: none;
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}
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/* --- the moving frame -------------------------------------------------- */
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#frameMover {
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position: fixed;
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top: 0;
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left: 0;
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/* Above the stills, so the live video always wins if anything ever overlaps. */
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z-index: 2;
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will-change: transform;
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}
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#frameSkin {
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position: relative;
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width: 100%;
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height: 100%;
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overflow: hidden;
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border-radius: 10px;
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border: 2px solid rgba(255, 255, 255, 0.85);
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box-shadow:
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0 0 0 4px rgba(255, 79, 195, 0.55),
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0 24px 70px rgba(0, 0, 0, 0.7);
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background: #000;
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}
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/* Lift the frame while the drag animation is holding it, the way a dragged
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window separates from the desktop. */
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#frameMover.dragging #frameSkin {
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box-shadow:
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0 0 0 4px rgba(255, 79, 195, 0.75),
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0 40px 100px rgba(0, 0, 0, 0.85);
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}
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/* The wash animation hands the frame the colour currently passing behind it. */
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#frameMover.washing #frameSkin {
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box-shadow:
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0 0 0 4px var(--wash, rgba(255, 79, 195, 0.55)),
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0 24px 70px rgba(0, 0, 0, 0.7);
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}
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/* --- the drawn pointer -------------------------------------------------- */
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/* Built and removed by the drag animation; nothing else on the page has one. */
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#pointer {
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position: fixed;
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top: 0;
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left: 0;
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z-index: 3;
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pointer-events: none;
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will-change: transform;
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filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.6));
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}
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#pointer svg {
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display: block;
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transition: transform 90ms ease;
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}
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/* The click itself: the arrow dips, so a grab is visible even mid-pause. */
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#pointer.down svg {
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transform: scale(0.82);
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}
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/* --- pong --------------------------------------------------------------- */
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/* Built and removed by the pong animation. Above the frame, so the ball is
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never hidden behind the paddle it is bouncing off. */
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#pong {
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position: fixed;
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inset: 0;
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z-index: 3;
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pointer-events: none;
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}
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#pongBall {
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position: absolute;
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top: 0;
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left: 0;
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background: #fff;
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/* Square, and no smoothing: the original had no room for a round ball. */
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box-shadow: 0 0 18px rgba(255, 79, 195, 0.7);
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will-change: transform;
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}
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/* Out of play between a goal and the next serve. */
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#pongBall.out {
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opacity: 0;
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}
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#pongScore {
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position: absolute;
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top: clamp(16px, 4vh, 56px);
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right: clamp(16px, 4vw, 72px);
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display: flex;
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gap: 0.35em;
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font-size: clamp(2.5rem, 7vh, 6rem);
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}
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#pongScore .digit {
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display: block;
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height: 1em;
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/* The viewBox is 24 wide by 44 tall. */
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width: calc(1em * 24 / 44);
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}
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/* An unlit segment stays visible, just barely — that faint ghost of the whole
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figure eight is what makes the display read as a seven-segment one. */
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#pongScore .segment {
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fill: rgba(255, 255, 255, 0.07);
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}
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#pongScore .segment.lit {
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fill: #fff;
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filter: drop-shadow(0 0 10px rgba(255, 79, 195, 0.8));
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}
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/* The paddle: a hard-edged slab, so the ball has something square to hit. */
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#frameMover.paddle #frameSkin {
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border-radius: 0;
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box-shadow:
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0 0 0 3px #fff,
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0 0 34px rgba(255, 79, 195, 0.6);
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}
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.deck {
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position: absolute;
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inset: 0;
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opacity: 0;
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/* Opacity is driven frame-by-frame during a crossfade, so no CSS transition
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here — it would fight the JS ramp. */
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}
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.deck iframe {
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width: 100%;
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height: 100%;
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border: 0;
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/* The iframe would otherwise swallow nothing useful, but keeping it inert
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avoids stray clicks pausing playback. */
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pointer-events: none;
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}
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/* The screen-capture stream's sink. Has to be in the document to keep getting
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frames (see capture.js), but must not be visible or catch clicks. */
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#captureSink {
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position: fixed;
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left: 0;
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top: 0;
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width: 1px;
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height: 1px;
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opacity: 0.01;
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pointer-events: none;
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z-index: -1;
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}
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#probe {
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position: fixed;
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left: -400px;
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top: -400px;
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width: 320px;
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height: 180px;
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opacity: 0;
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pointer-events: none;
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}
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/* --- start gate -------------------------------------------------------- */
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#gate {
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position: fixed;
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inset: 0;
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display: grid;
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place-items: center;
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background: rgba(20, 6, 15, 0.92);
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backdrop-filter: blur(6px);
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z-index: 10;
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cursor: pointer;
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transition: opacity 400ms ease;
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}
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#gate.hidden {
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opacity: 0;
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pointer-events: none;
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}
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.gate-inner {
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text-align: center;
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color: #fff;
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}
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.gate-inner h1 {
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font-size: clamp(2rem, 7vw, 5rem);
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margin: 0 0 0.3em;
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letter-spacing: -0.03em;
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color: var(--accent);
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}
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.gate-inner p {
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margin: 0 0 2em;
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opacity: 0.7;
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font-size: 1.05rem;
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}
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#start {
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font: inherit;
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font-size: 1.3rem;
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padding: 0.7em 3em;
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border: 0;
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border-radius: 999px;
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background: var(--accent);
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color: var(--ink);
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font-weight: 700;
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cursor: pointer;
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}
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#start:disabled {
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opacity: 0.35;
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cursor: default;
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}
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#status {
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position: fixed;
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bottom: 12px;
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right: 16px;
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z-index: 20;
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color: var(--accent);
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font-size: 0.8rem;
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letter-spacing: 0.08em;
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text-transform: uppercase;
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}
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