/* Colour tokens. Structure from @primer/primitives 11.10.0 (MIT), read from shared/tokens/primer.json - do not edit these values by hand. The accent is not Primer's; it is the brand teal, and it is set in shared/tokens.mjs. Three blocks and one rule between them: the light theme is the default, the dimmed theme answers a system preference, and [data-theme] is the reader's own choice and outranks both. The attribute is written onto before first paint by the theme script in shared/theme.mjs. */ :root { color-scheme: light dark; --canvas: #ffffff; --canvas-subtle: #f6f8fa; --canvas-inset: #f6f8fa; --neutral-muted: #818b981f; --border: #d1d9e0; --border-muted: #d1d9e0b3; --fg: #1f2328; --fg-muted: #59636e; --control-border: #818b98; --shadow-small: 0 1px 1px 0 #1f23280a, 0 1px 2px 0 #1f232808; --accent: #0f766e; --fg-on-accent: #ffffff; --theme-on: 0; --wash-near: 9%; --wash-far: 5%; --decor-tint: 13%; --decor-base: var(--canvas); } @media (prefers-color-scheme: dark) { :root { --canvas: #212830; --canvas-subtle: #262c36; --canvas-inset: #151b23; --neutral-muted: #656c7633; --border: #3d444d; --border-muted: #3d444db3; --fg: #d1d7e0; --fg-muted: #9198a1; --control-border: #656c76; --shadow-small: 0 1px 1px 0 #01040999, 0 1px 3px 0 #01040999; --accent: #3fcfbd; --fg-on-accent: #151b23; --theme-on: 1; --wash-near: 3%; --wash-far: 2%; --decor-tint: 28%; --decor-base: var(--decor-deep); } } :root[data-theme="light"] { color-scheme: light; --canvas: #ffffff; --canvas-subtle: #f6f8fa; --canvas-inset: #f6f8fa; --neutral-muted: #818b981f; --border: #d1d9e0; --border-muted: #d1d9e0b3; --fg: #1f2328; --fg-muted: #59636e; --control-border: #818b98; --shadow-small: 0 1px 1px 0 #1f23280a, 0 1px 2px 0 #1f232808; --accent: #0f766e; --fg-on-accent: #ffffff; --theme-on: 0; --wash-near: 9%; --wash-far: 5%; --decor-tint: 13%; --decor-base: var(--canvas); } :root[data-theme="dark"] { color-scheme: dark; --canvas: #212830; --canvas-subtle: #262c36; --canvas-inset: #151b23; --neutral-muted: #656c7633; --border: #3d444d; --border-muted: #3d444db3; --fg: #d1d7e0; --fg-muted: #9198a1; --control-border: #656c76; --shadow-small: 0 1px 1px 0 #01040999, 0 1px 3px 0 #01040999; --accent: #3fcfbd; --fg-on-accent: #151b23; --theme-on: 1; --wash-near: 3%; --wash-far: 2%; --decor-tint: 28%; --decor-base: var(--decor-deep); } /* The hand-written half of /site.css. The colour tokens above this point are generated from shared/tokens.mjs; everything below spends them. Four rules this file is written under: 1. Nothing here is load-bearing for reading the page. With the stylesheet missing the document is still a heading, some paragraphs and some lists, in order. 2. No rule may wait for a class to be added at runtime. There is one script on these sites - shared/theme.mjs, which remembers a reader's choice of light or dark - and the single attribute it writes, `data-theme` on , is written before the body is parsed and is read only by the generated token blocks above this file. Nothing here waits for it: with it absent the tokens are the light theme and the system preference, which is what every rule below spends. Anything else that would need script is not built. 3. Every modern feature used below degrades. A browser that supports none of them still gets the whole content, the right hierarchy and legible contrast; where the fallback would look broken instead of plain, the rule sits behind @supports. 4. The teal means something. It appears on the mark, on the single primary action, on the cursor typing the headline and on the one word of it that changes, on the cursor typing the transcript on kingshand, on the three engagement icons, on the focus ring, on the link or showcase tile under the pointer, and - at a fraction of its strength - in the abstract shapes behind the page. Nowhere else. An accent spent everywhere is not an accent. The mark is a cursor bar, so the headline's cursor and the mark are the same object saying the same thing, which is why that is one place and not two - and the transcript's caret is the third thing that same object is, on the one page where a terminal is what is being drawn. The rest of the headline's letters are the ordinary foreground: a two-line display heading in teal would be the page shouting, and it would take the one teal word's job away from it. Motion is off for anyone who asks for less of it, at the bottom of this file. */ /* ---------------------------------------------------------------- fonts Committed to this repository and served from this origin. Nothing on any page makes a request to a third party, so a self-hosted file is the only kind of web font allowed here. The italic is a real cut rather than a slant the browser invents, and it carries every in the mirrored documentation. The mono is here for two jobs: labels and code, and the typed headline, which needs a face where every character is exactly one ch wide. Licences sit beside the files. */ @font-face { font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap; src: url("/fonts/inter-latin-wght-normal.woff2") format("woff2"); } @font-face { font-family: "Inter"; font-style: italic; font-weight: 100 900; font-display: swap; src: url("/fonts/inter-latin-wght-italic.woff2") format("woff2"); } @font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("/fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); } @font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 600; font-display: swap; src: url("/fonts/ibm-plex-mono-latin-600-normal.woff2") format("woff2"); } /* ---------------------------------------------------------------- scale One type scale and one spacing scale, both stated once. Every size above the base is fluid, so the page breathes between a 320px phone and a 2560px monitor instead of stepping at a breakpoint. Each clamp keeps a rem term alongside the vw term: a scale built on vw alone stops growing when somebody zooms to 200%, which is the one time it matters most. */ :root { --font-sans: "Inter", ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace; --text-xs: 0.8125rem; /* 13px - mono labels, captions */ --text-sm: 0.9375rem; /* 15px - navigation, notes, facts */ --text-base: clamp(1rem, 0.97rem + 0.15vw, 1.125rem); /* 16 - 18px - prose */ --text-md: clamp(1.1875rem, 1.09rem + 0.42vw, 1.4375rem);/* 19 - 23px - standfirst */ --text-lg: clamp(1.375rem, 1.22rem + 0.7vw, 1.75rem); /* 22 - 28px - h3 */ --text-xl: clamp(1.625rem, 1.35rem + 1.2vw, 2.25rem); /* 26 - 36px - h2 */ --text-h1: clamp(2rem, 1.65rem + 1.6vw, 2.875rem); --text-display: clamp(2.25rem, 1.5rem + 3.1vw, 4.25rem); /* Multiples of 4px, so vertical distances land on one rhythm rather than near it. */ --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.5rem; --space-6: 2rem; --space-7: 3rem; --space-8: 4rem; --space-9: 5rem; /* The two numbers that decide where anything is horizontally, on every page of every site: the content column, and the space between it and the window. Nothing else may set a width, a horizontal margin or a horizontal padding on a page shell, a section or a block inside one - see the layout primitives below, which are the only rules that spend these. Changing the width of every site is changing --page, here, once. */ --page: 64rem; --gutter: var(--space-5); --radius: 6px; --radius-lg: 14px; --speed: 140ms; --ease: cubic-bezier(0.2, 0, 0.13, 1); } * { box-sizing: border-box; } html { -webkit-text-size-adjust: 100%; } /* No horizontal padding here. The gutter used to be body's, which meant the page's edges were decided in one place and its width in another, and the two had to be read together to know where anything was. Both are `.page` below now. What is left here is vertical. */ body { margin: 0; padding-bottom: var(--space-9); background: var(--canvas); color: var(--fg); font-family: var(--font-sans); font-size: var(--text-base); line-height: 1.65; font-synthesis-weight: none; text-rendering: optimizeLegibility; } /* The canvas is tinted rather than flat: two very soft washes of the accent, fixed behind everything, so the page has a light source instead of a blank sheet. The layer is fixed, so it sits under body text everywhere, not just the hero. These are two background layers and they composite, so the strength under any given pixel is the pair stacked, not either percentage on its own - and the worst point is not a gradient centre. The radii are absolute rem while the centres are percentages, so on a narrow viewport (320x640 is the worst of the sizes checked) both ellipses cover the whole width and their strengths add near the top edge. Stacked there the dark pair reaches 3.8% accent, where --fg-muted holds 4.75:1, and the light pair reaches 10.4%, where it holds 5.29:1; the floor is 4.5:1. At 4%/3% the dark stack was 5.4% accent and 4.61:1 - still passing, but on the margin. Changing either percentage means re-measuring the stack at a narrow viewport, not the layer being edited. */ body::before { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; } /* Every wash is behind the feature query rather than relying on the cascade to step back from it. A value holding var() is pending-substitution at parse time, so it wins the cascade and is only found to be invalid at computed-value time - at which point the property takes its initial value, not the declaration above it. A UA without color-mix() therefore gets no tint at all here, which is the plain result rule 3 asks for. The pair is stated once, as `--wash`, because the sticky header has to repaint it. That header is opaque - it has to be, or the page scrolls through it - and painted in the flat canvas it would be a rectangle of untinted colour laid over the strongest corner of the wash, with the tint still showing in the gutters on either side of it. So the header paints the canvas and then this on top of it, `background-attachment: fixed`, whose positioning area is the viewport - the same box the layer below is fixed to. The two therefore align exactly and the header is invisible against what it covers. Two consumers, one definition: editing this changes both. The two strengths are `--wash-near` and `--wash-far`, which are theme tokens - see SHAPE in shared/tokens.mjs. This block used to be written twice, the second copy inside `@media (prefers-color-scheme: dark)`, and that stopped being right the day a reader could choose a theme: a media query cannot see a choice, so a dimmed page chosen on a light machine would have been painted at the light theme's 9% and 5% - which is the pair measured against light text on a light canvas, not against near-white text on a dark one. As a token the strength follows the same cascade the colours do and there is one place that answers which theme this is. */ @supports (color: color-mix(in oklab, red 10%, white)) { :root { --wash: radial-gradient(70rem 45rem at 12% -12%, color-mix(in oklab, var(--accent) var(--wash-near), transparent), transparent 70%), radial-gradient(50rem 40rem at 96% 2%, color-mix(in oklab, var(--accent) var(--wash-far), transparent), transparent 66%); } body::before { background-image: var(--wash); } } /* ---------------------------------------------------------------- abstract decoration Three shapes behind the apex landing page: a dot field in the hero's empty right-hand side, and two soft pools bleeding in from the window's edges further down. Written here as gradients rather than fetched as an image, so the zero-external-request property survives, and none of it moves. The page already has a typing headline and two travelling strips; a third moving thing would be noise. The same three shapes as pass 4 built - what changed in pass 8 is how strong they are, and the reason is below. Scoped to `body.landing`, which only that page carries. This stylesheet is shared with the kingshand subdomain, and a tool's documentation is not the place for a company's decoration - it would also put a dot field behind a page whose hero this was never measured against. Every shape is a pseudo-element, so there is nothing in the markup to hide and nothing to announce - delete this block and the page reads identically. They sit behind their content at a negative z-index and take no pointer events. Two properties make the contrast question answerable rather than a hope. The pools are opaque at the core and fade to nothing, so every pixel under one lies on the straight segment between that opaque colour and whatever the canvas wash beneath it already was. Contrast against a fixed text colour is monotone along such a segment as long as the text's own luminance is not between the two ends - and it is nowhere near either end in either theme - so checking the two ends checks the whole gradient. A translucent teal veil would not have that property: it would add tint on top of the wash wherever the wash happened to be strongest, and that point moves with the viewport. ------------------------------------------------------ how strong the pools are, and why For four passes this was 9% of the accent into the canvas in light and 10% into the inset in the dimmed theme, and the King's verdict was the only one that matters: "I dont see any designs on screen, you earlier asked me abstract images vs real and we choose abstract, where is the output for that?" It was there and nobody could see it. The dimmed value was the worse of the two and for a reason worth writing down: the accent mixed into the *inset* at 10% lands at rgb(27,41,47) on a canvas of rgb(33,40,48). It had been tuned until it matched the thing it was supposed to differ from. So the dimmed pool no longer goes lighter, it goes **deeper**: the accent mixed into the inset deepened toward black. That is the move that buys everything, because in a dark theme every text colour on the page is lighter than the canvas, so a darker backdrop is more contrast rather than less. The pool is now rgb(18,49,47) - fifteen points of red below the canvas and nine of green above it, a teal a reader can plainly see - and the weakest text on the site, --fg-muted, holds 4.79:1 on it against a floor of 4.5. At the old 10% it held 5.13:1 and was invisible. That is the trade, and it is measured rather than reasoned: every number in this comment came out of a pixel scan of the rendered pages, not out of this file. Light went from 9% to 13% and stopped there, and what stopped it is not --fg-muted, which holds 5.11:1 at 13% and would hold 4.72:1 at 18%. It is the accent used as *text*: a link under the pointer is drawn in the accent, and the accent on a 13% pool is 4.57:1 where an 18% pool would put it at 4.22:1 - below the floor, in a state a reader can reach. 13% is the last value at which every state of every text colour on the page clears AA. Recorded in the design record for the King rather than decided here: if they will take teal-on-hover at 4.2:1 over a pool, light can go to 18% and the tint roughly doubles. The pools now run at every width, which is a change from pass 4. That pass gave a phone no decoration on the grounds that there was no empty space to fill, and that reasoning was right about the dot field and wrong about these: a pool is not an object competing for room, it is a light source behind the page, and a 390px screen has as much use for one as a monitor. The dot field stays above 64rem, because it *is* an object and a phone has no empty corner to put it in. That is also what happens when a reader zooms: rem does not scale with zoom, so the query fails before the type grows. The dot field is additive rather than substitutive, so it is placed rather than argued about, and at 45% of the accent it is now a texture a reader can see instead of a rumour. It is placed where no letter reaches: at 64rem and up the hero's text - a headline eighteen monospaced characters wide, a one-line standfirst, two buttons - comes nowhere near the right-hand quarter the dots occupy, and the mask keeps the dots themselves in the top-right corner of even that. That is checked by counting painted text pixels inside the field's own box at every width and both themes rather than by looking at it: none. `screen` does two jobs. Paper gets no decoration at all, and it needs no print rule to take it away again. A browser that fails either feature query gets none either, which is a plain readable page that has lost nothing. The two queries differ on purpose: a pool is a gradient and needs only color-mix(), while the dot field would be a hard-edged rectangle of dots without a mask, so only that one waits for mask-image. */ @media screen { @supports (color: color-mix(in oklab, red 10%, white)) { :root { /* The inset, deepened. Stated as its own step rather than folded into one nested mix, because the two halves answer different questions: this one is how dark the pool is, and the one below is how teal. Declared in both themes and read only by the dimmed one, which names it as its `--decor-base`; it has to be a declaration here rather than a token in shared/tokens.mjs, because a color-mix() belongs behind the feature query for one. */ --decor-deep: color-mix(in oklab, var(--canvas-inset) 45%, #000); /* One pool, two themes. `--decor-tint` and `--decor-base` are theme tokens - 13% into the canvas in light, 28% into the deepened inset in the dimmed theme - so this is a single rule rather than a media query that could not see a reader's choice. See SHAPE in shared/tokens.mjs, and the measurements below for what those two numbers cost. */ --decor-pool: color-mix(in oklab, var(--accent) var(--decor-tint), var(--decor-base)); } /* The pools are anchored to the document rather than to the window, so they sit at places on the page instead of following the reader down it. `inset: 0` is body's padding box, so the layer cannot make the document taller or wider than it already is - and body has no horizontal padding since the gutter moved into `.page`, so the pools now bleed from the window's own edges rather than from inside a gutter. */ body.landing { position: relative; } body.landing::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; /* Larger than they were, and holding their core for longer before the fade starts. Intensity alone was not the whole of why nobody could see these: a faint colour over a small area reads as a rendering artefact, and the same colour over a third of the page reads as a decision. */ background: radial-gradient(44rem 34rem at -4% 38%, var(--decor-pool), transparent 72%), radial-gradient(40rem 32rem at 104% 76%, var(--decor-pool), transparent 70%); } } } @media screen and (min-width: 64rem) { @supports (color: color-mix(in oklab, red 10%, white)) and (mask-image: radial-gradient(#000, transparent)) { :root { --decor-dot: color-mix(in oklab, var(--accent) 45%, var(--canvas)); } /* The dot field, in the hero's own right-hand corner. `main` is already a containing block through its container-type, but that is stated here rather than relied on. */ .landing main { position: relative; } .landing main::before { content: ""; position: absolute; top: 0; right: 0; z-index: -1; width: min(17rem, 30%); height: 11rem; pointer-events: none; background-image: radial-gradient(var(--decor-dot) 1.2px, transparent 1.3px); background-size: 1.35rem 1.35rem; /* Anchored at the corner, so the dots thin out toward the text rather than stopping at an edge. Without the mask this would be a rectangle of dots, which is why this block is behind a feature query for it. */ mask-image: radial-gradient(120% 120% at 100% 0, #000 0%, transparent 65%); } } } /* ---------------------------------------------------------------- layout primitives Three classes, and between them they own every horizontal decision any of these sites makes. Nothing else in this file may set a width, a horizontal margin or a horizontal padding on a page shell, a section, or a block that is a section's own child. This is the pass that made that a rule. Every width complaint this project has had - the FAQ answers, the footer paragraph, two section intros, the closing line of the contact section, the strips running to the screen edges - was the same fault reported five times: the design system had tokens for colour, type and space and no layout primitives, so each section was hand-built with its own width behaviour and no single rule decided anything. Five instructions, five one-element fixes, and the sixth section would have needed a sixth. The King: "not sure why we are not making sections and divs and reusing classes for all sections as it was a total waste of 2-3 hours, fixing stupid stuff." .page the content column. Carried by
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