/* GridWits — design system. No build step, no external fonts, no CDN. Every colour has a light and a dark value; the palette follows the visitor's system setting and [data-theme] on overrides it. Brand colours are the app's, from GridWits/Utilities/AppColors.swift — teal #2DD4BF, indigo #6366F1, amber #F5A623. The surfaces around them are the website's own: warm paper in light, a blue-black in dark. */ :root { /* ---- brand ---- */ --teal: #2DD4BF; --indigo: #6366F1; --brand-indigo: #6366F1; --brand-amber: #F5A623; --danger: #E24B4A; /* Board mark semantics, taken from the app's SudokuBoardTheme. These carry MEANING (kept / ruled out / sea / ship) and stay constant across games, unlike --hue, which is a game's branding. */ --mark-keep: #4CD97B; /* hitoriIncludeMarkColor, nurikabeLandMarkColor */ --mark-drop: #E24B4A; /* hitoriExcludeMarkColor */ --mark-sea: #333D52; /* nurikabeSeaColor */ --mark-ship: #2D527A; /* battleshipShipColor */ /* Kakuro needs its own pair. Its board is mostly UNPLAYABLE, so the few cells you can type in have to stand out at a glance — the generic on/off surfaces put block and white within a few points of each other and the whole grid read as one flat rectangle. */ --kakuro-block: #1B1E26; --kakuro-white: #FFFFFF; --kakuro-grid: #9AA0AC; /* Bridges draws its grid straight onto the PAGE background rather than onto filled cells, so --line (tuned against panels) all but vanishes there. This is the one value picked against --bg. */ --bridges-grid: #D6D1C5; /* Per-tier temperature ramp, same values the app's difficulty picker uses. */ --tier-easy: #4CD97B; --tier-medium: #2DD4BF; --tier-hard: #F5A623; --tier-expert: #FF6B6B; --tier-extreme: #C77DFF; /* ---- light surfaces ---- */ --bg: #FBFAF8; --bg-raised: #FFFFFF; --bg-sunken: #F1EFEA; --ink: #14161C; --ink-soft: #4E535E; --ink-faint: #8B909B; --line: #E3E0D9; --line-strong: #23262E; --accent: #0E7C6B; --accent-soft: #DCF0EC; --warn: #B2541F; /* Painted cell states for the tool games. `off` is the heavy state (shaded, sea, water); `on` is the light one. Defined per theme rather than derived, so the polarity never inverts. */ --state-on: #FFFFFF; --state-off: #23262E; --state-off-ink: #F4F1EA; /* ---- form ---- */ --radius: 14px; --radius-lg: 20px; --maxw: 1120px; --shadow: 0 1px 2px rgba(20, 22, 28, .05), 0 10px 30px -12px rgba(20, 22, 28, .16); --shadow-lift: 0 2px 4px rgba(20, 22, 28, .06), 0 22px 48px -18px rgba(20, 22, 28, .28); --ring: 0 0 0 1px var(--line); --ease: cubic-bezier(.22, .8, .3, 1); } @media (prefers-color-scheme: dark) { :root { --bg: #0A0C12; --bg-raised: #141821; --bg-sunken: #06080D; --ink: #EDEFF4; --ink-soft: #A2A8B8; --ink-faint: #6B7183; --line: #232833; --line-strong: #6E7689; --accent: #2DD4BF; --accent-soft: #10302B; --warn: #E0894F; --state-on: #243936; --state-off: #04060B; --state-off-ink: #6E7689; --kakuro-block: #05070C; --kakuro-white: #222A38; --kakuro-grid: #6C7794; --bridges-grid: #2C3444; --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 12px 32px -14px rgba(0, 0, 0, .8); --shadow-lift: 0 2px 6px rgba(0, 0, 0, .6), 0 28px 60px -20px rgba(0, 0, 0, .9); } } :root[data-theme="light"] { --bg: #FBFAF8; --bg-raised: #FFFFFF; --bg-sunken: #F1EFEA; --ink: #14161C; --ink-soft: #4E535E; --ink-faint: #8B909B; --line: #E3E0D9; --line-strong: #23262E; --accent: #0E7C6B; --accent-soft: #DCF0EC; --warn: #B2541F; --state-on: #FFFFFF; --state-off: #23262E; --state-off-ink: #F4F1EA; --kakuro-block: #1B1E26; --kakuro-white: #FFFFFF; --kakuro-grid: #9AA0AC; --bridges-grid: #D6D1C5; --shadow: 0 1px 2px rgba(20, 22, 28, .05), 0 10px 30px -12px rgba(20, 22, 28, .16); --shadow-lift: 0 2px 4px rgba(20, 22, 28, .06), 0 22px 48px -18px rgba(20, 22, 28, .28); } :root[data-theme="dark"] { --bg: #0A0C12; --bg-raised: #141821; --bg-sunken: #06080D; --ink: #EDEFF4; --ink-soft: #A2A8B8; --ink-faint: #6B7183; --line: #232833; --line-strong: #6E7689; --accent: #2DD4BF; --accent-soft: #10302B; --warn: #E0894F; --state-on: #243936; --state-off: #04060B; --state-off-ink: #6E7689; --kakuro-block: #05070C; --kakuro-white: #222A38; --kakuro-grid: #6C7794; --bridges-grid: #2C3444; --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 12px 32px -14px rgba(0, 0, 0, .8); --shadow-lift: 0 2px 6px rgba(0, 0, 0, .6), 0 28px 60px -20px rgba(0, 0, 0, .9); } * { box-sizing: border-box; } html { scroll-behavior: smooth; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { animation-duration: .01ms !important; transition-duration: .01ms !important; } } body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; } a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; } .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; } .narrow { max-width: 720px; } ::selection { background: color-mix(in srgb, var(--teal) 30%, transparent); } /* ---------------------------------------------------------------- header */ .site-head { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(1.8) blur(14px); border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent); } .site-head .wrap { display: flex; align-items: center; gap: 20px; height: 66px; } .brand { display: flex; align-items: center; gap: 11px; font-weight: 680; letter-spacing: -.02em; font-size: 17.5px; color: var(--ink); text-decoration: none; } .brand .mark { width: 28px; height: 28px; border-radius: 9px; background: linear-gradient(140deg, var(--teal), var(--indigo)); display: grid; grid-template: repeat(3, 1fr) / repeat(3, 1fr); gap: 2px; padding: 5px; box-shadow: 0 4px 14px -4px color-mix(in srgb, var(--teal) 60%, transparent); } .brand .mark i { background: #06080D; border-radius: 1.5px; opacity: .3; } .brand .mark i:nth-child(1), .brand .mark i:nth-child(5), .brand .mark i:nth-child(9) { opacity: .95; } .site-nav { margin-left: auto; display: flex; align-items: center; gap: 6px; } .site-nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; font-weight: 520; padding: 8px 13px; border-radius: 9px; transition: color .18s var(--ease), background .18s var(--ease); } .site-nav a:hover { color: var(--ink); background: var(--bg-sunken); } .site-nav a[aria-current="page"] { color: var(--ink); background: var(--bg-sunken); } .theme-toggle { margin-left: 6px; background: none; border: 1px solid var(--line); color: var(--ink-soft); width: 36px; height: 36px; border-radius: 10px; cursor: pointer; font-size: 15px; display: grid; place-items: center; transition: color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease); } .theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); transform: rotate(-12deg); } @media (max-width: 640px) { .site-head .wrap { gap: 10px; height: 60px; } .site-nav { gap: 1px; min-width: 0; } .site-nav a { padding: 7px 9px; font-size: 13.5px; } .site-nav .hide-sm { display: none; } .theme-toggle { margin-left: 3px; width: 32px; height: 32px; } .brand { font-size: 16px; gap: 8px; } .brand .mark { width: 25px; height: 25px; border-radius: 8px; } .wrap { padding: 0 16px; } } /* Nothing on this site is meant to scroll sideways. Any element that manages to exceed the viewport is a bug, but a phone should not be left with a broken-feeling page while it goes unnoticed. */ html, body { overflow-x: clip; } /* ------------------------------------------------------------------ hero */ .hero { position: relative; padding: clamp(56px, 9vw, 104px) 0 clamp(40px, 6vw, 64px); overflow: hidden; } /* A grid, faded out — the site is about grids, so the page should say so without an image asset. */ .hero::before { content: ""; position: absolute; inset: -10% -20% auto -20%; height: 150%; background-image: linear-gradient(to right, color-mix(in srgb, var(--line-strong) 22%, transparent) 1px, transparent 1px), linear-gradient(to bottom, color-mix(in srgb, var(--line-strong) 22%, transparent) 1px, transparent 1px); background-size: 46px 46px; -webkit-mask-image: radial-gradient(120% 70% at 78% 22%, #000 0%, transparent 68%); mask-image: radial-gradient(120% 70% at 78% 22%, #000 0%, transparent 68%); pointer-events: none; } /* A soft brand bloom behind the headline. */ .hero::after { content: ""; position: absolute; top: -28%; right: -10%; width: 620px; height: 620px; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--teal) 20%, transparent) 0%, color-mix(in srgb, var(--indigo) 12%, transparent) 42%, transparent 68%); filter: blur(20px); pointer-events: none; } .hero > * { position: relative; z-index: 1; } .hero h1 { font-size: clamp(38px, 7.2vw, 68px); line-height: 1.03; letter-spacing: -.042em; margin: 0 0 20px; font-weight: 700; max-width: 15ch; } .hero h1 em { font-style: normal; background: linear-gradient(100deg, var(--teal), var(--indigo) 78%); -webkit-background-clip: text; background-clip: text; color: transparent; } .hero p.lede { font-size: clamp(17px, 2vw, 20.5px); color: var(--ink-soft); max-width: 58ch; margin: 0 0 32px; line-height: 1.6; } .cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; } /* --------------------------------------------------------------- buttons */ .btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 22px; border-radius: 11px; font-weight: 580; font-size: 15.5px; text-decoration: none; border: 1px solid transparent; cursor: pointer; font-family: inherit; letter-spacing: -.01em; transition: transform .18s var(--ease), box-shadow .18s var(--ease), opacity .18s var(--ease), border-color .18s var(--ease); } .btn:active { transform: translateY(1px); } .btn-primary { background: linear-gradient(135deg, var(--teal), #14B8A6 60%, var(--indigo) 190%); color: #04100E; box-shadow: 0 8px 24px -10px color-mix(in srgb, var(--teal) 80%, transparent); } .btn-primary:hover { transform: translateY(-1px); box-shadow: 0 14px 34px -12px color-mix(in srgb, var(--teal) 90%, transparent); } .btn-ghost { border-color: var(--line); color: var(--ink); background: var(--bg-raised); box-shadow: var(--shadow); } .btn-ghost:hover { border-color: var(--line-strong); transform: translateY(-1px); } /* Honest status line for a product with no App Store listing yet. */ .soon { display: flex; align-items: center; gap: 10px; margin: 26px 0 0; font-size: 14.5px; color: var(--ink-faint); } .soon-dot { width: 7px; height: 7px; border-radius: 50%; flex: none; background: var(--brand-amber); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-amber) 16%, transparent); } /* -------------------------------------------------------------- sections */ section { padding: clamp(44px, 6vw, 72px) 0; scroll-margin-top: 84px; } h2 { font-size: clamp(26px, 3.6vw, 36px); letter-spacing: -.028em; margin: 0 0 14px; font-weight: 680; } h3 { font-size: 18px; letter-spacing: -.014em; margin: 0 0 8px; font-weight: 630; } .section-lede { color: var(--ink-soft); max-width: 62ch; margin: 0 0 36px; font-size: 16.5px; } /* ----------------------------------------------------------- game cards */ .games { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(248px, 1fr)); } .game { position: relative; overflow: hidden; background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 22px; display: flex; flex-direction: column; gap: 12px; box-shadow: var(--shadow); transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease); /* Each game gets its own hue; the card tints itself from this one value. */ --hue: var(--teal); } /* A card that is itself a link must not underline its heading and body. */ a.game { text-decoration: none; color: inherit; } a.game:hover, .game:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: color-mix(in srgb, var(--hue) 45%, var(--line)); } /* A wash of the game's hue, revealed on hover. */ .game::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(120% 80% at 50% -20%, color-mix(in srgb, var(--hue) 16%, transparent), transparent 62%); opacity: 0; transition: opacity .22s var(--ease); } .game:hover::before { opacity: 1; } .game > * { position: relative; z-index: 1; } /* App-Store-shaped game icon: a rounded tile in the game's hue with a white motif on top. The gradient lives here rather than in each SVG so nine icons on one page cannot collide over gradient ids. */ .gicon { width: 66px; height: 66px; border-radius: 16px; flex: none; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg, color-mix(in srgb, var(--hue) 92%, #fff 8%), color-mix(in srgb, var(--hue) 62%, #1B1E28 38%)); box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 45%, transparent), 0 8px 20px -8px color-mix(in srgb, var(--hue) 70%, transparent); transition: transform .22s var(--ease), box-shadow .22s var(--ease); } .gicon svg { width: 46px; height: 46px; display: block; } .game:hover .gicon { transform: translateY(-2px) rotate(-3deg) scale(1.04); box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 55%, transparent), 0 14px 28px -8px color-mix(in srgb, var(--hue) 85%, transparent); } .game h3 { margin: 0; letter-spacing: -.018em; } .game p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.55; } .game .tag { align-self: flex-start; margin-top: auto; padding-top: 10px; font-size: 13px; color: var(--hue); font-weight: 600; letter-spacing: -.01em; display: inline-flex; align-items: center; gap: 5px; } /* The arrow lives here so it can animate; markup carries the label only. */ .game .tag::after { content: "\2192"; transition: transform .22s var(--ease); } .game:hover .tag::after { transform: translateX(3px); } /* Per-game hues. Distinct enough to tell apart at a glance, all legible on both themes. */ .game[data-game="sudoku"] { --hue: #2DD4BF; } .game[data-game="kakuro"] { --hue: #6366F1; } .game[data-game="hitori"] { --hue: #F5A623; } .game[data-game="bridges"] { --hue: #38BDF8; } .game[data-game="nurikabe"] { --hue: #4CD97B; } .game[data-game="slitherlink"] { --hue: #C77DFF; } .game[data-game="battleship"] { --hue: #FF6B6B; } .game[data-game="skyscrapers"] { --hue: #FBBF24; } .game[data-game="skyscrapersplus"] { --hue: #F472B6; } /* -------------------------------------------------------------- features */ .feature-grid { display: grid; gap: 30px; grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); } .feature h3 { display: flex; align-items: center; gap: 8px; } .feature p { color: var(--ink-soft); margin: 0; font-size: 15.5px; } /* ---------------------------------------------------------------- footer */ .site-foot { border-top: 1px solid var(--line); margin-top: 56px; padding: 38px 0; color: var(--ink-faint); font-size: 14px; } .site-foot .wrap { display: flex; flex-wrap: wrap; gap: 10px 26px; align-items: center; } .site-foot a { color: var(--ink-soft); text-decoration: none; } .site-foot a:hover { color: var(--ink); } .site-foot .spacer { margin-left: auto; } /* ------------------------------------------- long-form docs (privacy/terms) */ .doc { padding: 52px 0 24px; } .doc h1 { font-size: clamp(30px, 4.6vw, 42px); letter-spacing: -.032em; margin: 0 0 8px; font-weight: 700; } .doc .updated { color: var(--ink-faint); font-size: 14px; margin: 0 0 36px; } .doc h2 { font-size: 21px; margin: 38px 0 10px; } .doc h3 { font-size: 16.5px; margin: 24px 0 6px; } .doc p, .doc li { color: var(--ink-soft); } .doc li { margin-bottom: 7px; } .doc strong { color: var(--ink); font-weight: 620; } .doc table { border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 14px; } .doc th, .doc td { text-align: left; padding: 10px 13px; border-bottom: 1px solid var(--line); vertical-align: top; } .doc th { color: var(--ink); font-weight: 620; } .doc td { color: var(--ink-soft); } .doc .scroll { overflow-x: auto; } .callout { background: linear-gradient(135deg, color-mix(in srgb, var(--teal) 9%, var(--bg-raised)), color-mix(in srgb, var(--indigo) 7%, var(--bg-raised))); border: 1px solid color-mix(in srgb, var(--teal) 26%, transparent); border-radius: var(--radius); padding: 16px 18px; margin: 22px 0; font-size: 14.5px; } .callout p { margin: 0; color: var(--ink); } /* ------------------------------ shared chrome: toolbars and segmented sets */ .toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 18px; } .seg { display: inline-flex; flex-wrap: wrap; background: var(--bg-sunken); border: 1px solid var(--line); border-radius: 11px; padding: 3px; gap: 2px; max-width: 100%; } .seg button { border: 0; background: none; color: var(--ink-soft); font: inherit; font-size: 13.5px; font-weight: 520; padding: 7px 13px; border-radius: 8px; cursor: pointer; transition: color .16s var(--ease), background .16s var(--ease); } .seg button[aria-pressed="true"] { background: var(--bg-raised); color: var(--ink); box-shadow: var(--shadow); } .seg button:hover { color: var(--ink); } .seg button:disabled { opacity: .4; cursor: not-allowed; } /* The board-size picker sits beside difficulty. Its labels are numeric and all the same shape, so they can be tighter than the tier words — Bridges shows six sizes next to five tiers, which is a long row otherwise. */ #sizes button { padding: 7px 10px; font-variant-numeric: tabular-nums; } .timer { margin-left: auto; font-variant-numeric: tabular-nums; color: var(--ink-soft); font-size: 15.5px; letter-spacing: .01em; } @media (max-width: 560px) { .timer { margin-left: 0; } } /* ================================================= ambient page background The hero has its own grid and bloom. Every other page gets a quieter version of the same idea so the site reads as one surface rather than a bright front page bolted to plain documents. */ body::before { content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none; background-image: linear-gradient(to right, color-mix(in srgb, var(--line-strong) 13%, transparent) 1px, transparent 1px), linear-gradient(to bottom, color-mix(in srgb, var(--line-strong) 13%, transparent) 1px, transparent 1px); background-size: 54px 54px; -webkit-mask-image: radial-gradient(130% 90% at 50% 0%, #000 0%, transparent 62%); mask-image: radial-gradient(130% 90% at 50% 0%, #000 0%, transparent 62%); } body::after { content: ""; position: fixed; z-index: -1; pointer-events: none; top: -320px; left: 50%; transform: translateX(-50%); width: min(1200px, 130vw); height: 720px; border-radius: 50%; background: radial-gradient(ellipse at center, color-mix(in srgb, var(--teal) 11%, transparent) 0%, color-mix(in srgb, var(--indigo) 8%, transparent) 40%, transparent 70%); filter: blur(30px); } /* The hero paints its own, brighter version — don't double up behind it. */ .hero::before { opacity: .85; } /* Daily cards carry the day's tier instead of a blurb. */ .daily-meta { display: flex; align-items: center; gap: 9px; } .tier-pill { font-size: 12px; font-weight: 620; padding: 3px 9px; border-radius: 999px; border: 1px solid currentColor; background: color-mix(in srgb, currentColor 13%, transparent); } .tier-pill.tier-easy { color: var(--tier-easy); } .tier-pill.tier-medium { color: var(--tier-medium); } .tier-pill.tier-hard { color: var(--tier-hard); } .tier-pill.tier-expert { color: var(--tier-expert); } .tier-pill.tier-extreme { color: var(--tier-extreme); } /* The meta row sits between the blurb and the Play tag, so it needs its own spacing rather than inheriting a paragraph's. */ .daily-meta { margin: 2px 0 0; }