Easter egg: Athega Space

README.md

@@ -481,3 +481,7 @@ eller borttagning av äldre filer och bloggdemon.
 
 Kör `npm run build` efter ändringar, eller `npm start` för lokal förhandsvisning.
 Om utvecklingsservern får en annan port än 8080 används adressen den skriver ut.
+
+## Hemligt rymdspel
+
+Kontroller, multiplayer, arkitektur och tester finns i [spelets README](docs/space-egg/README.md).

_includes/layout.html

@@ -30,5 +30,6 @@
     {% include "header.html" %}
     {{ content }}
     {% include "footer.html" %}
+    <script type="module" src="/assets/space-egg/trigger.js?v=14"></script>
   </body>
 </html>

assets/space-egg/arena.js

@@ -0,0 +1,76 @@
+export const WORLD_WIDTH = 1280;
+export const WORLD_HEIGHT = 800;
+
+// Every pilot uses this layout viewport. Only the camera changes with the screen.
+export function cameraFor(viewWidth, viewHeight, ship) {
+  const scale = Math.min(1, Math.max(viewWidth / WORLD_WIDTH, viewHeight / WORLD_HEIGHT));
+  const visibleWidth = viewWidth / scale;
+  const visibleHeight = viewHeight / scale;
+  const x = Math.max(0, Math.min(WORLD_WIDTH - visibleWidth, ship.x - visibleWidth / 2));
+  const y = Math.max(0, Math.min(WORLD_HEIGHT - visibleHeight, ship.y - visibleHeight / 2));
+  return {
+    x, y, scale,
+    left: Math.max(0, (viewWidth - WORLD_WIDTH * scale) / 2) - x * scale,
+    top: Math.max(0, (viewHeight - WORLD_HEIGHT * scale) / 2) - y * scale,
+    visibleWidth: Math.min(WORLD_WIDTH, visibleWidth),
+    visibleHeight: Math.min(WORLD_HEIGHT, visibleHeight),
+  };
+}
+
+export async function createArena(url, { signal } = {}) {
+  const response = await fetch(url, { signal });
+  if (!response.ok) throw new Error('Spelplanen kunde inte laddas.');
+  const page = new DOMParser().parseFromString(await response.text(), 'text/html');
+  page.querySelectorAll('script, base, meta[http-equiv="refresh"]').forEach(node => node.remove());
+  const base = page.createElement('base');
+  base.href = response.url;
+  page.head.prepend(base);
+  const style = page.createElement('style');
+  style.textContent = 'html { scrollbar-width: none; scroll-behavior: auto !important; } ::-webkit-scrollbar { display: none; }';
+  page.head.append(style);
+  const container = document.createElement('div');
+  container.id = 'athega-space-arena';
+  container.inert = true;
+  container.setAttribute('aria-hidden', 'true');
+  container.style.cssText = 'visibility:hidden;position:fixed;inset:0;overflow:hidden;background:#050b14;z-index:2147483646;pointer-events:none';
+  const iframe = document.createElement('iframe');
+  iframe.title = 'Gemensam spelplan';
+  iframe.setAttribute('sandbox', 'allow-same-origin');
+  iframe.style.cssText = `position:absolute;width:${WORLD_WIDTH}px;height:${WORLD_HEIGHT}px;border:0;transform-origin:0 0`;
+  container.append(iframe);
+  iframe.srcdoc = '<!doctype html>' + page.documentElement.outerHTML;
+  document.body.append(container);
+  try {
+    // A sandboxed document may eagerly fetch archive images. The arena only needs
+    // its DOM, styles and fonts; waiting for window.load stalls large blog pages.
+    await new Promise((resolve, reject) => {
+      const started = performance.now();
+      const poll = setInterval(() => {
+        if (signal?.aborted) { clearInterval(poll); reject(signal.reason); return; }
+        const doc = iframe.contentDocument;
+        // Force layout so web fonts are requested before checking their status.
+        doc?.documentElement?.getBoundingClientRect();
+        if (doc?.querySelector('main') && doc.readyState !== 'loading'
+          && [...doc.querySelectorAll('link[rel="stylesheet"]')].every(link => link.sheet) && doc.fonts.status === 'loaded') {
+          clearInterval(poll);
+          resolve();
+        } else if (performance.now() - started > 15000) {
+          clearInterval(poll);
+          reject(new Error('Spelplanen tog för lång tid att ladda.'));
+        }
+      }, 50);
+    });
+  } catch (error) {
+    container.remove();
+    throw error;
+  }
+  return {
+    container,
+    document: iframe.contentDocument,
+    window: iframe.contentWindow,
+    position(camera) {
+      iframe.style.transform = `translate(${camera.left}px, ${camera.top}px) scale(${camera.scale})`;
+    },
+    close() { container.remove(); },
+  };
+}

assets/space-egg/combat.js

@@ -0,0 +1,44 @@
+export const POWERUPS = {
+  triple: { label: '3X', name: 'Trippelskott', duration: 12 },
+  mine: { label: 'MIN', name: 'Mina · placera med M', duration: 0 },
+  shield: { label: 'SK', name: 'Sköld', duration: 10 },
+  bomb: { label: 'BOM', name: 'Bomb · släpp med B', duration: 0 },
+  rapid: { label: 'RF', name: 'Snabbeld', duration: 12 },
+  repair: { label: '+', name: 'Reparation +40', duration: 0 },
+  turbo: { label: 'T', name: 'Turbo', duration: 10 },
+  scroll: { label: 'S↕', name: 'Snabbscroll för alla', duration: 8 },
+  gravity: { label: 'G↓', name: 'Gravitation för alla', duration: 8 },
+};
+
+export function damageHull(hull, amount, protectedShip) {
+  if (protectedShip || hull <= 0) return hull;
+  return Math.max(0, hull - amount);
+}
+
+export function expandedRect(rect, radius) {
+  return { left: rect.left - radius, right: rect.right + radius, top: rect.top - radius, bottom: rect.bottom + radius };
+}
+
+export function effectSeconds(deadline, now) {
+  return Math.max(0, Math.min(POWERUPS.gravity.duration, (deadline - now) / 1000));
+}
+
+// Reflect at the document edges; keep fractional pixels between animation frames.
+export function advanceScroll(position, direction, distance, maximum) {
+  if (maximum <= 0) return { position: 0, direction: 1 };
+  let next = Math.max(0, Math.min(maximum, position)) + direction * distance;
+  while (next < 0 || next > maximum) {
+    if (next > maximum) { next = maximum * 2 - next; direction = -1; }
+    if (next < 0) { next = -next; direction = 1; }
+  }
+  return { position: next, direction };
+}
+
+export function shipContact(ship, other, fallbackSide = 1) {
+  const dx = ship.x - other.x;
+  const dy = ship.y - other.y;
+  const distance = Math.hypot(dx, dy);
+  const separation = 30;
+  if (distance >= separation) return null;
+  return { nx: distance ? dx / distance : fallbackSide, ny: distance ? dy / distance : 0, overlap: separation - distance };
+}

assets/space-egg/game.css

@@ -0,0 +1,120 @@
+:host { all: initial; position: fixed; inset: 0; z-index: 2147483647; color: #fff; font: 14px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; }
+* { box-sizing: border-box; }
+.world-canvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; }
+button { font: inherit; cursor: pointer; color: inherit; border: 1px solid #5d6267; background: #151a20; border-radius: 8px; min-height: 44px; padding: 9px 13px; touch-action: manipulation; }
+button:hover { background: #29313a; border-color: #ff6600; }
+button:focus-visible { outline: 2px solid #ff8c40; outline-offset: 3px; }
+[hidden] { display: none !important; }
+.hud { position: absolute; z-index: 2; left: max(16px, env(safe-area-inset-left)); right: max(16px, env(safe-area-inset-right)); top: 12px; display: flex; justify-content: space-between; align-items: start; gap: 12px; pointer-events: none; }
+.hud > * { pointer-events: auto; }
+.scoreboard { background: #111820f2; border: 1px solid #4b535d; border-left: 3px solid #ff6600; border-radius: 6px; padding: 10px 16px; box-shadow: 0 8px 32px #0003; }
+.pace { display: block; font-size: 11px; color: #ffb480; font-variant-numeric: tabular-nums; }
+.power-status { display: block; color: #8ee7d1; font-size: 10px; margin-top: 4px; }
+.kicker { display: block; font-size: 10px; letter-spacing: .16em; text-transform: uppercase; color: #ff9b58; }
+.score { display: block; font-size: 25px; font-variant-numeric: tabular-nums; line-height: 1.2; }
+.actions { display: flex; flex-wrap: wrap; justify-content: flex-end; max-width: min(65%, 380px); gap: 8px; }
+.briefing { position: absolute; inset: 0; display: grid; place-items: center; padding: 20px; background: #08101aa8; backdrop-filter: blur(5px); }
+.panel { width: min(100%, 440px); background: #101820; border: 1px solid #49525c; border-top: 3px solid #ff6600; border-radius: 16px; padding: 32px; box-shadow: 0 30px 100px #0007; }
+h1 { font: 500 clamp(30px, 7vw, 42px)/1.1 system-ui, sans-serif; letter-spacing: -.04em; margin: 12px 0 20px; }
+p { color: #c5cdd5; margin: 12px 0; }
+.primary { background: #ff6600; color: #111315; border-color: #ff6600; font-weight: 700; width: 100%; margin-top: 16px; }
+.primary:hover { background: #ff8b3d; }
+.instructions { font-size: 12px; border-block: 1px solid #36414c; padding: 14px 0; }
+.bottom { position: absolute; bottom: max(20px, env(safe-area-inset-bottom)); left: 16px; right: 16px; display: flex; justify-content: center; pointer-events: none; }
+.bottom button { pointer-events: auto; background: #101820ed; }
+.hint { position: absolute; bottom: 78px; left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px); text-align: center; padding: 6px 12px; border-radius: 6px; background: #101820ed; color: #dce2e7; font-size: 11px; pointer-events: none; }
+.touch { display: none; }
+@media (pointer: coarse), (max-width: 640px) {
+  .touch { display: flex; position: absolute; bottom: max(22px, env(safe-area-inset-bottom)); align-items: center; justify-content: center; }
+  .stick { left: 20px; width: 104px; height: 104px; border: 1px solid #74808b; background: #101820df; border-radius: 50%; touch-action: none; }
+  .stick::before { content: ''; position: absolute; inset: 34px; border: 1px solid #ff9b58; border-radius: 50%; background: #ff660033; transform: translate(var(--stick-x, 0px), var(--stick-y, 0px)); }
+  .stick span { position: absolute; bottom: 9px; font-size: 9px; letter-spacing: .1em; color: #c5cdd5; }
+  .navigate { right: 110px; width: 60px; height: 60px; bottom: max(32px, env(safe-area-inset-bottom)); border-radius: 50%; border: 2px solid #52d8f5; background: #122934; color: #a5edff; font-weight: bold; touch-action: none; }
+  .fire { right: 20px; width: 80px; height: 80px; border-radius: 50%; background: #ff6600; border: 3px solid #ffae77; color: #111315; font-weight: bold; touch-action: none; box-shadow: 0 0 24px #ff660033; }
+  .bottom { bottom: 148px; }
+  .hint { bottom: 204px; }
+  .scoreboard { padding: 8px 10px; }
+  .score { font-size: 21px; }
+  .actions { gap: 5px; }
+  .actions button { padding: 8px; font-size: 12px; }
+  .panel { padding: 24px; }
+}
+
+@media (max-height: 600px) {
+  .briefing { display: block; overflow-y: auto; padding-top: 160px; }
+  .panel { margin: 0 auto; }
+}
+
+@media (max-width: 360px) {
+  .actions { max-width: 170px; flex-wrap: wrap; justify-content: flex-end; }
+  .stick { left: 12px; width: 88px; height: 88px; }
+  .fire { right: 12px; }
+  .navigate { right: 102px; }
+}
+
+.connection-status { display: block; font-size: 9px; color: #a6bacb; max-width: 135px; }
+.lobby, .missions { position: absolute; inset: 0; z-index: 5; overflow-y: auto; padding: 24px; background: #07101de8; display: flex; }
+.lobby .panel, .missions .panel { margin: auto; }
+h2 { font: 500 28px/1.2 system-ui, sans-serif; margin: 12px 0; }
+.lobby p, .missions p { font-size: 12px; }
+.lobby-actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
+label { display: block; font-size: 12px; color: #c5d4e1; margin: 12px 0; }
+input, select { display: block; width: 100%; margin-top: 6px; padding: 10px; border: 1px solid #536b80; border-radius: 6px; background: #08121d; color: #e5f3ff; font: 12px/1.4 ui-monospace, monospace; }
+button:disabled { opacity: .45; cursor: default; }
+.bottom { gap: 8px; }
+@media (max-width: 640px) {
+ .hud { gap: 6px; }
+ .scoreboard { max-width: 128px; }
+ .actions { max-width: 62%; }
+ .actions button { min-height: 36px; font-size: 11px; padding: 6px 8px; }
+ .lobby, .missions { padding: 12px; }
+ .lobby .panel, .missions .panel { padding: 20px; }
+}
+
+.local-invite { border-left: 2px solid #ff6600; padding-left: 10px; }
+
+.pilot-list { list-style: none; margin: 6px 0 0; padding: 0; font-size: 10px; max-width: 140px; overflow-wrap: anywhere; }
+
+.hull-status { display: block; color: #e5f3ff; font-size: 11px; margin-top: 6px; }
+.gravity-status { display: block; color: #ffd16c; font-size: 11px; margin-top: 6px; }
+.rules, .join-manually { border-top: 1px solid #36414c; margin-top: 16px; padding-top: 12px; }
+summary { cursor: pointer; font-size: 12px; padding: 5px 0; }
+summary span, .name-label > span { color: #a6b6c5; font-size: 10px; }
+.rule { display: flex; align-items: center; gap: 12px; cursor: pointer; }
+.rule input { width: 20px; height: 20px; margin: 0; accent-color: #ff6600; }
+.rule small { display: block; color: #a6b6c5; font-size: 11px; }
+.rules p { font-size: 11px; }
+.lobby-status:empty { display: none; }
+.lobby-actions { justify-content: space-between; }
+.disconnect { border-color: transparent; color: #a6b6c5; }
+input:focus-visible, summary:focus-visible { outline: 2px solid #ff8c40; outline-offset: 3px; }
+.crew { margin: 18px 0; padding: 12px 14px; border: 1px solid #36414c; border-radius: 8px; background: #08121d; }
+.crew h3 { display: flex; justify-content: space-between; margin: 0 0 8px; font: 12px ui-monospace, monospace; color: #c5d4e1; }
+.crew-list { list-style: none; margin: 0; padding: 0; font-size: 13px; overflow-wrap: anywhere; }
+.crew-list li { padding: 4px 0; }
+.crew-list li::before { content: '●'; margin-right: 10px; }
+
+.radar { position: absolute; right: 16px; bottom: 84px; width: 132px; padding: 2px; border: 1px solid #4b657a; background: #08121ded; pointer-events: none; }
+.radar canvas { display: block; width: 128px; height: 80px; }
+.radar span { display: block; font-size: 8px; text-align: center; letter-spacing: .2em; color: #aec2d3; }
+.offscreen-pilots { position: absolute; inset: 0; pointer-events: none; }
+.offscreen-pilot { position: absolute; transform: translate(-50%, -50%); background: #08121deb; border: 1px solid currentColor; padding: 4px 7px; border-radius: 6px; font-size: 10px; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+@media (pointer: coarse), (max-width: 640px) {
+  .radar { top: 110px; bottom: auto; right: 12px; transform: scale(.8); transform-origin: top right; }
+}
+
+.round-clock { display: block; font-size: 22px; font-variant-numeric: tabular-nums; color: #ffd18e; }
+.kill-count { display: block; font-size: 10px; margin-bottom: 4px; }
+.results { position: absolute; inset: 0; z-index: 6; display: flex; overflow-y: auto; padding: 24px; background: #07101df2; }
+.results .panel { margin: auto; }
+.result-list { padding: 0; list-style: none; font-size: 13px; }
+.result-list li { padding: 12px 0; border-bottom: 1px solid #36414c; }
+.result-list .winner { color: #ffb26f; }
+.result-exit { margin-top: 12px; }
+
+.ordnance { position: absolute; right: 16px; bottom: 20px; display: flex; gap: 8px; }
+.ordnance button { min-width: 80px; border-color: #ba853f; }
+@media (pointer: coarse), (max-width: 900px) {
+  .ordnance { left: 16px; right: auto; bottom: 196px; }
+  .hint { display: none; }
+}