/* Theming. Two palettes, switched by a `data-theme` attribute on . A tiny inline script in sets the attribute before paint to avoid a flash of wrong theme on slow first loads. :root must come BEFORE the [data-theme] rules so the attribute selectors (same specificity, but later in the source) win when toggling. */ :root { --bg: #121213; --surface: #1e1e20; --surface-2: #2a2a2d; --border: #3a3a3d; --text: #f5f5f5; --text-dim: #a0a0a5; --green: #538d4e; --yellow: #b59f3b; --gray: #3a3a3c; --accent: #4f8cff; --accent-hover: #6ba0ff; --danger: #c0392b; --orange: #d27537; --tile-color: #f6ecd2; --op-color: #dbe6ff; --paren-color: #c8a8a8; --title-border: #2a4060; --error-text: #ff7d7d; --streak-color: #ff7d3b; } [data-theme="dark"] { --bg: #121213; --surface: #1e1e20; --surface-2: #2a2a2d; --border: #3a3a3d; --text: #f5f5f5; --text-dim: #a0a0a5; --green: #538d4e; --yellow: #b59f3b; --gray: #3a3a3c; --accent: #4f8cff; --accent-hover: #6ba0ff; --danger: #c0392b; --orange: #d27537; --tile-color: #f6ecd2; --op-color: #dbe6ff; --paren-color: #c8a8a8; --title-border: #2a4060; --error-text: #ff7d7d; --streak-color: #ff7d3b; } [data-theme="light"] { --bg: #fafafa; --surface: #ffffff; --surface-2: #f0f0f3; --border: #d4d4d8; --text: #18181b; --text-dim: #71717a; --green: #538d4e; --yellow: #8a7825; --gray: #d4d4d8; --accent: #2563eb; --accent-hover: #1d4ed8; --danger: #b91c1c; --orange: #c2410c; --tile-color: #8b6f3f; --op-color: #3b62a8; --paren-color: #8b6868; --title-border: #2a4060; --error-text: #b91c1c; --streak-color: #c2410c; } * { box-sizing: border-box; } html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; min-height: 100vh; } /* Suppress browsers' double-tap-to-zoom on every interactive element. Setting touch-action on body alone isn't reliable in iOS Safari — it has to be on the tap target itself. Pinch-zoom is still allowed elsewhere. */ button, input, .tile, header h1 { touch-action: manipulation; } header { text-align: center; padding: 1.25rem 1rem 0.5rem; border-bottom: 1px solid var(--border); } .header-inner { position: relative; max-width: 560px; margin: 0 auto; } .puzzle-date { position: absolute; top: 0; left: 0; height: 2rem; display: flex; align-items: center; font-size: 0.8rem; font-weight: 700; color: var(--text-dim); letter-spacing: 0.01em; } .help-btn { position: absolute; top: 0; right: 0; width: 2rem; height: 2rem; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); color: var(--text-dim); font-family: inherit; font-weight: 700; font-size: 1rem; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: color 0.15s, border-color 0.15s, background 0.15s; } .help-btn:hover { color: var(--text); border-color: var(--accent); } .theme-btn { position: absolute; top: 0; right: 2.5rem; width: 2rem; height: 2rem; border-radius: 50%; border: 1px solid var(--border); background: var(--surface); color: var(--text-dim); font-family: inherit; font-size: 1rem; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: color 0.15s, border-color 0.15s, background 0.15s; padding: 0; } .theme-btn:hover { color: var(--text); border-color: var(--accent); } header h1 { margin: 0; display: inline-block; padding: 0.35rem 1rem 0.45rem; border: 2px solid var(--title-border); border-radius: 10px; font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, system-ui, sans-serif; font-size: 2.75rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; cursor: pointer; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; background: linear-gradient( 100deg, #2f6b3a 0%, #538d4e 35%, #7ec070 65%, #b8e6a8 100% ); -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent; filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.45)); transition: filter 0.2s, transform 0.08s; } header h1:active { transform: scale(0.98); filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.45)); } .tagline { margin: 0.25rem 0 0.5rem; color: var(--text-dim); font-size: 0.9rem; } main { max-width: 560px; margin: 0 auto; padding: 1rem; display: flex; flex-direction: column; gap: 1rem; } /* Target banner — solo block at the top. Goal you're solving for. */ .target-banner { text-align: center; padding: 0.5rem 0; } .target-area, .current-area { text-align: center; } .target-label, .current-label, .guesses-label { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.25rem; } .target-number, .current-number { font-size: 3rem; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; transition: color 0.15s; } .target-number { color: var(--accent); } .current-number { color: var(--text-dim); } /* While the player is building an expression that computes to something, * the result reads in a dull gold — clearly "not the target yet" but * not failure either. Flips to bright green only on an exact match. */ .current-number.has-value { color: var(--yellow); } .current-number.match { color: var(--green); } /* Timer bar */ .timer-section { display: flex; flex-direction: column; gap: 0.25rem; } .timer-bar { display: flex; gap: 2px; height: 18px; border-radius: 4px; padding: 2px; background: var(--surface); border: 1px solid var(--border); } .timer-bar .cell { flex: 1 1 0; min-width: 0; background: var(--gray); border-radius: 1px; transition: background 0.15s; } /* Positional gradient: each cell's hue is set inline (0 = red, 120 = green) so the bar shows a smooth red→yellow→green sweep when full. The legacy warn/danger per-cell overrides are no longer needed — running out of time naturally exposes the red end of the bar. */ .timer-bar .cell.on { background: hsl(var(--cell-hue, 120), 55%, 45%); } .timer-bar.danger { animation: pulse 0.8s ease-in-out infinite; } .timer-readout { text-align: center; color: var(--text-dim); font-size: 0.8rem; font-variant-numeric: tabular-nums; letter-spacing: 0.05em; } @keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.02); } } .start-area { display: flex; flex-direction: column; align-items: stretch; gap: 0.5rem; padding: 0.5rem 0; } .start-area[hidden] { display: none; } .locked-notice { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 0.9rem 1rem; text-align: center; } .locked-notice strong { display: block; font-size: 1.05rem; margin-bottom: 0.35rem; } .locked-notice p { margin: 0.2rem 0; color: var(--text-dim); font-size: 0.9rem; } .locked-notice .hint { font-size: 0.8rem; opacity: 0.85; } .big { padding: 1rem 1.5rem !important; font-size: 1.1rem !important; width: 100%; } /* Start button — outlined to twin the title's stamped look. Transparent fill keeps the timer bar as the lone solid-green block, and the blue Submit guess can own the "primary action" slot once a round is live. */ #startBtn { background: transparent; border: 2px solid #2f6b3a; color: #7ec070; border-radius: 10px; font-family: inherit; font-weight: 700; letter-spacing: 0.04em; cursor: pointer; transition: background 0.15s, border-color 0.15s, color 0.15s; } #startBtn:hover:not(:disabled) { background: rgba(83, 141, 78, 0.12); border-color: #538d4e; color: #b8e6a8; } #startBtn:disabled { opacity: 0.5; cursor: not-allowed; } /* Stats grid (streak / wins) */ .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.5rem; margin: 0.75rem 0; } .stats:empty { display: none; } .stat { text-align: center; padding: 0.5rem 0.25rem; background: var(--surface-2); border-radius: 6px; } .stat .num { font-size: 1.5rem; font-weight: 700; line-height: 1; color: var(--text); font-variant-numeric: tabular-nums; } .stat .lbl { font-size: 0.65rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 0.3rem; } .stat.streak .num { color: var(--streak-color); } /* Guess history */ .guess-history { display: flex; flex-direction: column; gap: 0.4rem; } .guess-row { display: flex; align-items: center; justify-content: space-between; padding: 0.5rem 0.75rem; border-radius: 6px; background: var(--surface); border-left: 4px solid var(--gray); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.9rem; } .guess-row.exact { border-left-color: var(--green); background: rgba(83, 141, 78, 0.15); } .guess-row.close { border-left-color: var(--yellow); background: rgba(181, 159, 59, 0.12); } .guess-row.far { border-left-color: var(--gray); } .guess-expr { color: var(--text-dim); flex: 1; overflow-x: auto; white-space: nowrap; } .guess-result { font-weight: 700; color: var(--text); margin-left: 0.75rem; white-space: nowrap; } .guess-history:empty::before { content: "No guesses yet."; color: var(--text-dim); font-size: 0.85rem; font-style: italic; } /* Board — vertical stack of tiles / ops / results / submit, with a * consistent gap so each row has breathing room. */ .board { display: flex; flex-direction: column; gap: 0.6rem; } /* Number tiles */ .numbers-row { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0.4rem; } .tile { background: var(--surface); border: 2px solid var(--border); border-radius: 8px; padding: 0.5rem 0; font-size: 1.4rem; font-weight: 700; text-align: center; cursor: pointer; transition: transform 0.08s, border-color 0.08s, background 0.08s; user-select: none; /* Warm cream in dark mode; darker caramel in light mode for contrast. */ color: var(--tile-color); font-family: inherit; box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07); } .tile:hover:not(:disabled) { border-color: var(--accent); } .tile:active:not(:disabled) { transform: scale(0.96); } .tile.selected { border-color: var(--accent); background: rgba(79, 140, 255, 0.18); } .tile.used { opacity: 0.3; cursor: not-allowed; text-decoration: line-through; } .tile.derived { border-style: dashed; border-color: var(--accent); } .tile.hidden-tile { color: var(--text-dim); background: var(--surface-2); border-style: dashed; opacity: 0.6; } /* Results box — sits between operators and submit. Wraps the in-progress * expression, the live computed "Yours" value, and inline edit controls * (Clear + ⌫). Reads as one "equation in progress" block. */ .results-box { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem; display: flex; flex-direction: column; gap: 0.5rem; } /* Equals row — Clear on the left, the big "=" divider centred, * ⌫ on the right. Uses a 3-column grid (1fr auto 1fr) so the divider * is dead-centred in the row regardless of the buttons' different * widths; each button is anchored to its outer edge via justify-self. */ .equals-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 0.5rem; padding: 0.3rem 0 0.1rem; } .equals-row > .edit-btn:first-child { justify-self: start; } .equals-row > .edit-btn:last-child { justify-self: end; } .equals-divider { width: 64px; height: 10px; border-top: 3px solid var(--text-dim); border-bottom: 3px solid var(--text-dim); user-select: none; pointer-events: none; } /* Result line — centred, sits below the equals-divider. The result * number now stands alone since the equals "label" became the divider. */ .results-equals { display: flex; align-items: baseline; justify-content: center; padding: 0.15rem 0; } .results-equals .current-number { font-size: 1.8rem; line-height: 1; } /* Edit buttons (Clear + ⌫). Shared styling regardless of which row they * live in. */ .edit-btn { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); border-radius: 6px; padding: 0.45rem 0.7rem; font-size: 0.95rem; font-weight: 600; font-family: inherit; cursor: pointer; min-width: 2.4rem; } .edit-btn:hover:not(:disabled) { border-color: var(--accent); } .edit-btn:active:not(:disabled) { transform: scale(0.96); } .edit-btn:disabled { opacity: 0.4; cursor: not-allowed; } /* Expression wrap — positioning context for the marquee hint that * overlays the empty input. */ .expr-wrap { position: relative; } /* Marquee-scrolling hint. Shown when #exprInput is empty (placeholder * is a single space so :placeholder-shown matches but the placeholder * itself is invisible). Hidden once the player taps the first tile. */ .expr-hint { position: absolute; inset: 0; display: flex; align-items: center; padding: 0 0.75rem; pointer-events: none; overflow: hidden; white-space: nowrap; color: var(--text-dim); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 1.05rem; border-radius: 6px; } .expr-hint span { display: inline-block; /* Starts off-screen right, scrolls leftward across the visible area, * exits off-screen left, then loops. Slow enough to read comfortably. */ animation: expr-hint-scroll 14s linear infinite; will-change: transform; } @keyframes expr-hint-scroll { 0% { transform: translateX(100%); } 100% { transform: translateX(-100%); } } /* Hide the marquee once the expression has content. */ .expr-wrap:has(#exprInput:not(:placeholder-shown)) .expr-hint { display: none; } /* Accessibility-only helper — visible to screen readers, removed from * the visual layout. The marquee is aria-hidden, so this preserves the * instruction for assistive tech without showing it twice on screen. */ .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; } .results-edit button { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); border-radius: 6px; padding: 0.45rem 0.7rem; font-size: 0.95rem; font-weight: 600; font-family: inherit; cursor: pointer; min-width: 2.4rem; } .results-edit button:hover:not(:disabled) { border-color: var(--accent); } .results-edit button:active:not(:disabled) { transform: scale(0.96); } .results-edit button:disabled { opacity: 0.4; cursor: not-allowed; } /* Builder area (legacy — wrapper still exists in older builds, keep * the class around so script.js doesn't choke on lookups elsewhere) */ .builder { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem; } #exprInput { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 1.2rem; padding: 0.6rem 0.75rem; border-radius: 6px; outline: none; cursor: default; user-select: none; -webkit-user-select: none; text-align: center; } #exprInput::placeholder { color: var(--text-dim); } .builder-hint { color: var(--text-dim); font-size: 0.8rem; margin-top: 0.4rem; } /* Operators */ .operators { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0.4rem; } .op-btn { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); font-size: 1.5rem; padding: 0.6rem 0; border-radius: 8px; cursor: pointer; font-weight: 700; font-family: inherit; } .op-btn:hover:not(:disabled) { border-color: var(--accent); } .op-btn:active:not(:disabled) { transform: scale(0.96); } .op-btn.selected { background: var(--accent); border-color: var(--accent); color: white; } .op-btn:disabled { opacity: 0.4; cursor: not-allowed; } /* Math operators in a pale blue-white so they quietly echo the accent palette (target number, Submit) without competing. */ .op-btn[data-op="+"], .op-btn[data-op="−"], .op-btn[data-op="×"], .op-btn[data-op="÷"] { color: var(--op-color); } /* Parentheses sit slightly darker with a hint of dusty rose — they're structural punctuation, so they recede behind the operators and tiles. */ .op-btn[data-op="("], .op-btn[data-op=")"] { color: var(--paren-color); } /* Hint row sits between the results box and Submit. Secondary affordance that stays out of the way until the player wants it. */ .hint-row { display: flex; flex-direction: column; gap: 0.4rem; align-items: stretch; } /* Setting display: flex above overrides the UA stylesheet's [hidden] { display: none }, so we have to re-assert it. Without this the hint button is visible in the idle phase before Start is pressed. Also accept a class-based hide for cases where a third-party rule might out-specify [hidden]. */ .hint-row[hidden], .hint-row.is-hidden { display: none; } .hint-btn { align-self: center; padding: 0.45rem 0.9rem; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-dim); font-family: inherit; font-size: 0.85rem; font-weight: 600; cursor: pointer; -webkit-tap-highlight-color: transparent; } .hint-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--text); } .hint-btn:active:not(:disabled) { transform: scale(0.96); } .hint-btn:disabled { opacity: 0.5; cursor: default; } .hint-display { text-align: center; font-size: 0.9rem; color: var(--accent); font-style: italic; line-height: 1.4; /* Cumulative reveal stacks multiple lines of hint text; pre-line keeps the \n separators rendering as visual line breaks. */ white-space: pre-line; } /* Controls — Submit guess alone now (Clear + ⌫ live inside .results-box). */ .controls { display: grid; grid-template-columns: 1fr; gap: 0.4rem; } .controls button { padding: 0.9rem 0.5rem; border-radius: 8px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font-weight: 700; cursor: pointer; font-family: inherit; font-size: 1.05rem; } .controls button:hover:not(:disabled) { border-color: var(--accent); } .controls button.primary { background: var(--accent); border-color: var(--accent); color: white; } .controls button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); } .controls button:disabled { opacity: 0.6; cursor: not-allowed; } /* Muted = still clickable but signalled as 'not ready yet'. Tap fires a helper message instead of trying to evaluate an empty expression. */ .controls button.muted { opacity: 0.6; } .status { text-align: center; min-height: 1.4em; color: var(--text-dim); font-size: 0.9rem; } .status.error { color: var(--error-text); } .status.ok { color: var(--accent); } /* End modal */ .modal { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.7); display: flex; align-items: center; justify-content: center; z-index: 10; } .modal[hidden] { display: none; } .modal-content { background: var(--surface); border: 1px solid var(--border); padding: 1.5rem; border-radius: 10px; max-width: 420px; width: calc(100% - 2rem); text-align: center; } .modal-content h2 { margin-top: 0; } .modal-content p { white-space: pre-line; } .modal-content button { padding: 0.7rem 1.5rem; font-family: inherit; font-size: 1rem; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); border-radius: 8px; cursor: pointer; font-weight: 600; } .modal-content button.primary { background: var(--accent); border-color: var(--accent); color: white; } .modal-content button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); } .modal-buttons { display: flex; gap: 0.5rem; justify-content: center; margin-top: 0.75rem; flex-wrap: wrap; } .solution { background: var(--surface-2); border-radius: 6px; padding: 0.5rem 0.75rem; font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.9rem; color: var(--text-dim); margin: 0.5rem 0; } .solution:empty { display: none; } .solution .lbl { display: block; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin-bottom: 0.2rem; } .solution .expr { color: var(--text); } .intro-list { text-align: left; margin: 0.75rem 0; padding-left: 1.25rem; color: var(--text); font-size: 0.95rem; line-height: 1.5; } .intro-list li { margin-bottom: 0.4rem; } .intro-list strong { color: var(--text); } .intro-example { background: var(--surface-2); border-radius: 6px; padding: 0.55rem 0.75rem; margin: 0.5rem 0 0.25rem; font-size: 0.9rem; color: var(--text-dim); } .intro-example code { font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--text); } .share-bar { font-size: 1.4rem; letter-spacing: 0.04em; line-height: 1; margin: 0.75rem 0 0.25rem; text-align: center; white-space: nowrap; } .share-bar:empty { display: none; } .share-legend { margin-top: 0.6rem; text-align: left; background: var(--surface-2); border-radius: 6px; padding: 0.5rem 0.75rem; font-size: 0.85rem; color: var(--text-dim); } .share-legend summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; } .share-legend summary::-webkit-details-marker { display: none; } .share-legend summary::before { content: "▸"; display: inline-block; width: 1em; color: var(--text-dim); } .share-legend[open] summary::before { content: "▾"; } .share-legend ul { margin: 0.5rem 0 0.25rem; padding-left: 0; list-style: none; } .share-legend li { padding: 0.15rem 0; display: flex; align-items: center; gap: 0.5rem; } .share-legend .sq { font-size: 1rem; line-height: 1; } .share-legend .legend-foot { margin: 0.4rem 0 0; font-size: 0.8rem; font-style: italic; } @media (max-width: 420px) { .tile { font-size: 1.1rem; } .target-number, .current-number { font-size: 2.4rem; } header h1 { font-size: 2.1rem; letter-spacing: 0.1em; } }