Changelog

• UIBumped the precise timer from 2 decimals to 3 (e.g. 0:32.135) — 2 decimals can't always tell two close finishes apart.

• FeatureFinal time and per-set times in the share card now show fractional seconds, so close finishes don't all look like ties.
• UIStats aggregates (Best, Average, Time Played) stay at mm:ss — sub-second precision isn't meaningful across many runs.

• UICards now sit centered in the viewport, and the title + icon row stack above on narrow screens.
• UICard number labels shrink on small screens so they don't crowd the shapes.
• UISnappier taps after finding a few sets — no more sticky :hover repaints, and only the newly-found slot is re-rendered.
• UIAdded a /.well-known/security.txt per Cloudflare's recommendation.

• FeatureNew Labels button numbers each card 1–12 — so a kid can shout "card 3, card 7, card 11" to the teacher at the smartboard. Stays on once you turn it on.
• A11yYou can now play with just the keyboard: Tab between cards, Enter or Space to select.
• A11yScreen readers announce what's happening — each card you select, whether your pick was a set, and where you are in the puzzle.
• A11yIf your device has "reduce motion" on, the repeating hint glow and the confetti stay off. Quick card flashes still happen so you know your click registered.
• A11yClear focus outline on every button, card, and date, so you can see what's highlighted when using the keyboard.

• UIShare text now uses ♻️ for re-picking an already-found set and ❌ for picking three cards that aren't a set. Previously both showed as ❌.

• FeatureStats modal shows today's completions and average time across all players

• UIDark mode is now neutral grays instead of green-tinted. Brand green still appears for selections, hovers, badges, and the dot in the title — anywhere it carries meaning — but surfaces and text are grayscale.

• FeatureCompletion modal shows how many completions today's puzzle has across everyone and the average time, updated live
• PrivacyAnonymous — no account or ID stored, just per-day counters
• FeatureNot included in the share text — your shared result stays private

• UIHow to Play, Stats, and the theme toggle moved to a top icon row in the page header
• UIBottom row trimmed to in-game actions only (Hint, Restart, Share) with a softer pill style
• UIYesterday's Solution moved into the calendar dropdown as a link
• UIShare button is hidden until you finish a puzzle, then reopens the completion modal on click
• UICalendar stays open when you open Yesterday's Solution from inside it, so closing the modal returns you to the calendar
• UITop header has a subtle background tint to delineate the chrome zone from the puzzle

• FeatureOptional Google Sign-In in the Stats modal backs up your stats and syncs them across devices
• FeatureSync runs in the background — local storage stays the source of truth, page loads instantly whether you're online, offline, or signed out
• FeatureSmart merge on first sign-in: combines per-device stats by taking the best of each (lowest time, lowest mistakes, highest play count)
• FeatureReset stats can optionally delete your synced cloud copy too
• PrivacySign-in is opt-in. When signed in, only an opaque Google ID and your stats blob are stored on the server — no email, no passwords, no third-party trackers

• FeatureNew Stats dashboard with current/longest streak, puzzles solved, best time, average time, total time played, accuracy, and flawless count
• Feature"Average time to find each set" bar chart so you can see which set position is usually the grind
• FeatureCompletion celebration badges: 🎉 first solve, ⚡ personal best, 💎 flawless, 🎯 clean, 🧠 no hints, 🔥 streak, 🏅 milestones
• FeatureShare text includes any badges you earned on that run
• FeatureReplays count toward "Total plays" in the stats breakdown; "Solved" stays at unique-puzzle count
• UIDate picker highlights days you've already solved with a green dot
• FeatureAll stats stored locally — no account, nothing leaves your device by default

• FeatureAdded a Dark Mode / Light Mode toggle in game controls
• FeatureTheme preference now saves and persists between visits
• UIWhen no preference is saved, theme defaults to your system setting and live-updates if your OS theme changes

• FeatureHint button — highlights a card from an unfound set, builds on your current selection
• FeatureShare text now shows your game progress: ❌ per miss, 💡 per hint, 🟩 per set found, with timestamps
• FeatureFeedback form — tell me what's broken or what you want
• UIAmber shake on selected cards when hint says you're at a dead end
• UIShare preview box in the completion modal

• FeatureClick the date to open a calendar and play any puzzle from this year
• UIDropdown calendar with month navigation
• UIDropdown arrow (⏷) indicates the date is clickable

• FeatureAdded "How to Play" button with visual instructions
• UIShows all 4 card features with example images
• UIIncludes 3 example SETs demonstrating valid combinations
• UIMoved HN upvote link to completion modal

• FeatureRed shake animation for invalid sets
• FeatureGreen shake animation for already-found sets
• UIOutlined button style (green border instead of solid)
• UIResponsive page widths with hybrid layout
• UIBetter mobile spacing for game controls

• FixTimer now starts on page load instead of first click
• FixRestart button also resets the timer
• UICleaner card layout and spacing

• FeaturePrivacy-friendly analytics via GoatCounter
• FeaturePuzzle completion time tracking
• FixCloudflare Worker proxy to bypass ad blockers

• FeaturePuzzles pre-generated for a year and cached in JSON
• FeatureGitHub Action to regenerate puzzles yearly
• UIFaster page load with cached puzzles

• FeatureDaily Set puzzle with 12 cards and 6 valid sets
• FeatureSeeded random generation (same puzzle for everyone each day)
• FeatureTimer, share button, and confetti on completion
• FeatureYesterday's Solution modal
• UIResponsive design with card selection animations