Modal

Pure-black-first canvas — #000000 body paired with #181818 panel doing the dominant surface work, lit by a single acid-green brand accent #7fee64 (the most-frequent brand-tier color). Foreground text is a near-white green-tinted #ddffdc; on the rare light section the canvas inverts to #def0dd. Secondary text descends through muted greens: #5b6d5c (the most-measured text color) for de-emphasized body. A supporting teal #10a550 carries secondary accent state. The accent green appears almost exclusively in CTAs, links, and as low-opacity radial glows — never as a large fill.

• Pure-black canvas pair #000000 (body, 1290 measured occurrences) + #181818 (panel) doing the dominant surface work
• Near-white green-tinted text #ddffdc (863 occurrences) as the primary reading layer on the dark canvas
• Muted green #5b6d5c (the single most-measured text color, 1426 occurrences) for de-emphasized / secondary body text
• Acid-green brand accent #7fee64 (isBrandTier) reserved for CTAs, links, focus, and gradient glows — surface area kept scarce
• Secondary teal accent #10a550 (isBrandTier) for supporting state and secondary emphasis, never competing with the primary green
• Light-section inversion #def0dd background only where the page deliberately flips out of dark mode

radial-gradient(165% 110% at 50% 100%, rgba(128, 238, 100, 0.4) 0%, rgba(128, 238, 100, 0.22) 22%, rgba(128, 238, 100, 0.1) 42%, rgba(128, 238, 100, 0.03) 65%, rgba(128, 238, 100, 0) 92%)
radial-gradient(55% 45% at 45% -8%, rgba(195, 198, 64, 0.85) 0%, rgba(120, 130, 30, 0.55) 22%, rgba(0, 0, 0, 0) 65%)
radial-gradient(35% 45% at 105% 32%, rgba(120, 220, 130, 0.75) 0%, rgba(40, 140, 70, 0.45) 25%, rgba(0, 0, 0, 0) 70%)
radial-gradient(60% 80% at -8% 50%, rgba(127, 238, 100, 0.55), rgba(127, 238, 100, 0) 65%)
linear-gradient(to top, rgb(33, 37, 37), rgba(0, 0, 0, 0))

• Display family: Goga (self-hosted) carries all headings from 24px to 64px. Body family: Inter Variable. Monospace: Fira Mono (self-hosted, weights 400/500/700) for code, kbd, and technical labels.
• Display weight ladder: Goga 400 (most headings) + 500 (hero / display sizes 42-64px). Body Inter Variable at 400 (reading) / 500 (UI labels + dense body).
• Heading scale (Goga): 24px / 30px / 40px / 54px / 64px — large-step jumps for clear hierarchy. Hero sits at 64px with unitless 1.0 line-height (display sits tight).
• Body Inter Variable: 16px / 14px / 12px with line-heights 24 / 20 / 16px respectively. Default body is 16px/500 with -0.36px tracking.
• Letter-spacing in px, not em: -0.36px is the recurring optical correction on body and most UI text; large Goga headings run at normal tracking; 12px micro-labels use +0.6px positive tracking.
• Monospace mandatory for code, inline `kbd`, and technical identifiers (Fira Mono). Reach for it to signal the developer register the page is built for.
• No second display font beyond Goga — the display/body/mono trio is the boundary; mixing in a fourth family dilutes the technical voice.

• 2px base unit. Scale: 2 / 4 / 6 / 8 / 10 / 12 / 16 / 18 / 20 / 24 / 28 / 32 — 20px (103 occurrences) and 12px (60) are the dominant rhythm values.
• Container max-width 1400px (the primary bounded rail). Narrow content clusters use a 368px secondary rail.
• Gutter values for flex/grid draw from 8 / 12 / 18 / 20 / 24 / 32 / 48 / 64 px — 24px (25 occurrences) is the default flex gap; 32px and 48px appear in grid columns/rows.
• Section padding leans on 32px (49 occurrences) as the primary block padding; 24px and 20px for tighter clusters.
• Card / control padding: 16-24px on desktop, 8-12px on dense mobile. Always pick from scale values; no magic numbers.

• Primary elevation is a 1px solid hairline border (the overwhelmingly dominant border treatment — 89 hairline occurrences, solid style). Use a border before reaching for a drop shadow.
• Drop shadows are rare and soft — the one captured shadow is `0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1)`. Never a bloom or a halo.
• Depth on the black canvas comes from background-shift (#000000 body → #181818 panel) plus the 1px hairline, not from stacked shadow.
• Green radial gradients provide perceived depth and atmosphere as ambient light sources behind content — layer them under text, never over it.

• Radius scale: 4 / 8 / 11 / 12 / 25 px. 8px (16 occurrences) is the workhorse; 12px for larger cards; 25px for pill-shaped controls and badges.
• Buttons and inputs default to 8px radius; larger cards/panels 11-12px; pills use the 25px radius for tag/indicator chips.
• Icons are stroke-based, thin weight, to match the monospace technical register; no filled or duotone variants.
• Tap targets minimum 40×40px on pointer, 44×44 on touch — per standard accessible control sizing.

• button-primary

  backgroundColor

  #7fee64

  textColor

  #000000

  radius

  8px

  padding

  8px 16px

  border

  1px solid transparent

  boxShadow

  none

  fontFamily

  Inter Variable

  fontWeight

  500

  fontSize

  14px

  lineHeight

  20px

  letterSpacing

  -0.36px

  Tailwind

  Copy

  inline-flex min-h-[40px] items-center gap-2 rounded-[8px] bg-[#7fee64] px-4 py-2 text-[14px] font-medium leading-[20px] tracking-[-0.36px] text-[#000000] transition-colors duration-[150ms] ease-[cubic-bezier(0.4,0,0.2,1)] hover:bg-[#10a550] hover:text-[#ddffdc] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#7fee64] focus-visible:ring-offset-2 focus-visible:ring-offset-[#000000]

• button-secondary

  backgroundColor

  #181818

  textColor

  #ddffdc

  radius

  8px

  padding

  8px 16px

  border

  1px solid #485346

  boxShadow

  none

  fontFamily

  Inter Variable

  fontWeight

  500

  fontSize

  14px

  lineHeight

  20px

  Tailwind

  Copy

  inline-flex min-h-[40px] items-center gap-2 rounded-[8px] border border-[#485346] bg-[#181818] px-4 py-2 text-[14px] font-medium leading-[20px] tracking-[-0.36px] text-[#ddffdc] transition-colors duration-[150ms] ease-[cubic-bezier(0.4,0,0.2,1)] hover:border-[#7fee64] hover:text-[#7fee64] focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#7fee64]

• card-surface

  backgroundColor

  #181818

  textColor

  #ddffdc

  radius

  12px

  padding

  24px

  border

  1px solid #485346

  boxShadow

  none

  Tailwind

  Copy

  rounded-[12px] border border-[#485346] bg-[#181818] p-6 text-[#ddffdc] transition-colors duration-[150ms] ease-[cubic-bezier(0.4,0,0.2,1)] hover:border-[#7fee64]

• glow-section

  backgroundColor

  #000000

  backgroundImage

  radial-gradient(165% 110% at 50% 100%, rgba(128, 238, 100, 0.4) 0%, rgba(128, 238, 100, 0.22) 22%, rgba(128, 238, 100, 0.1) 42%, rgba(128, 238, 100, 0.03) 65%, rgba(128, 238, 100, 0) 92%)

  padding

  32px

  textColor

  #ddffdc

  Tailwind

  Copy

  relative overflow-hidden bg-[#000000] p-8 text-[#ddffdc] before:pointer-events-none before:absolute before:inset-0 before:bg-[radial-gradient(165%_110%_at_50%_100%,rgba(128,238,100,0.4)_0%,rgba(128,238,100,0.22)_22%,rgba(128,238,100,0.1)_42%,rgba(128,238,100,0.03)_65%,rgba(128,238,100,0)_92%)]

• input-field

  backgroundColor

  #000000

  textColor

  #ddffdc

  radius

  8px

  padding

  8px 12px

  border

  1px solid #485346

  boxShadow

  none

  fontFamily

  Inter Variable

  fontSize

  16px

  lineHeight

  24px

  letterSpacing

  -0.36px

  Tailwind

  Copy

  w-full rounded-[8px] border border-[#485346] bg-[#000000] px-3 py-2 text-[16px] leading-[24px] tracking-[-0.36px] text-[#ddffdc] placeholder:text-[#5b6d5c] transition-colors duration-[150ms] ease-[cubic-bezier(0.4,0,0.2,1)] focus-visible:outline-none focus-visible:border-[#7fee64] focus-visible:ring-1 focus-visible:ring-[#7fee64]

• code-block

  backgroundColor

  #181818

  textColor

  #ddffdc

  radius

  8px

  padding

  16px

  border

  1px solid #485346

  fontFamily

  Fira Mono

  fontSize

  14px

  lineHeight

  20px

  Tailwind

  Copy

  rounded-[8px] border border-[#485346] bg-[#181818] p-4 font-mono text-[14px] leading-[20px] text-[#ddffdc] [font-family:'Fira_Mono',monospace]

• Primary easing: cubic-bezier(0.4, 0, 0.2, 1) (the standard ease-in-out, 50 occurrences) anchors most color/background/border transitions.
• Supporting easings: cubic-bezier(0, 0, 0.2, 1) (ease-out, for entering elements), ease-out (legacy keyword), and the signature bouncy cubic-bezier(0.34, 1.56, 0.64, 1) for selective overshoot personality.
• Five durations captured: 0.15s (primary state change, 52 occurrences), 0.3s (reveals + filter), 0.5s (opacity reveals), and 0.6s/0.9s (paired bouncy translate). Most interactive transitions sit on 0.15s.
• The bouncy cubic-bezier(0.34, 1.56, 0.64, 1) is the expressive signature — spend it on hero/entrance moments, not on routine hovers.
• useReducedMotion mandatory: all animations collapse to opacity-only or disable, including the bouncy overshoot.
• No loop animations except the explicit 80s linear logo marquees and loaders.

• CTAs use the solid acid-green button as the single primary action per section; secondary actions use the bordered near-black variant.
• Links carry the green accent on hover/focus; default body links underline only on interaction to keep the dense black canvas calm.
• Code samples are first-class interactive content — copy-to-clipboard on hover, monospace throughout, never screenshotted.
• Accordion: single-open for FAQ; multi-open only for nested documentation.
• Tooltips reveal on hover + focus with a short delay, dismiss instantly on blur.
• Modals for destructive confirmations; never nested modals. Drawers for mobile-only expansions.
• Empty / loading states: monospace caption + green inline spinner for buttons; skeleton shimmer for content. No full-page overlays.

Desktop-first because the audience is engineers on wide displays evaluating infrastructure (Modal's primary container extends to 1400px). Mobile reflows the same language — the dark canvas, green accent, and type scale stay intact; nothing is hidden or re-architected behind a hamburger-only alternate layout. The page is the page, just narrower.

• Breakpoints: sm 640 / md 768 / lg 1024 / xl 1280 / 2xl 1536 — standard Tailwind ladder (matches captured media queries at 768/1024/1200).
• Container max-width 1400px primary, 368px for narrow bounded clusters.
• Hide-on-mobile is banned — if a control exists on desktop, it must reach mobile via reflow.
• Tap target minimum 44×44 on touch; 40×40 on pointer devices.
• Typography scales proportionally: hero 64 → 40 → 30 (Goga), body holds 16 → 14; tracking stays at -0.36px across sizes.
• Honor the captured `prefers-reduced-motion` and `forced-colors` media queries — both are observed in the source.

• focus-visible: 2px green (#7fee64) ring with a #000000 offset on every interactive element. Mandatory, never removed.
• All interactive elements reachable via Tab in logical reading order; never rely on hover to expose actions.
• Color contrast: #ddffdc on #000000 ≈ 18:1 (AAA); the green accent #7fee64 on #000000 ≈ 14:1 — but never place small green text on near-black panels (#181818) without verifying ≥ 4.5:1. Muted #5b6d5c on #000000 is borderline — reserve it for large or de-emphasized text only.
• ARIA labels on icon-only buttons; aria-expanded on collapsible regions; aria-live='polite' on toast and status updates.
• Motion respects prefers-reduced-motion (the media query is present in source) — animations reduce to opacity-only, including the bouncy overshoot curve.
• Honor forced-colors / Windows High Contrast (the media query is present in source) — never rely on the green accent alone to convey state.
• Tap targets minimum 44×44 on touch; 40×40 on pointer.
• Form errors announced via aria-describedby on the associated input; never color-only signaling — pair the green/teal with text or an icon.

The source ships SvelteKit (observable via /_app/immutable/ asset paths and svelte-scoped animation class names). Motion is CSS-driven (css-only font strategy, scoped @keyframes for the 80s logo marquee). The signature green ambient lighting is pure layered CSS radial gradients — no canvas, no WebGL. Icons are stroke-based, thin weight.

• Ambient green glows are layered CSS radial-gradients on the section background — calibrate opacity to single digits to 40% so they read as light, not fill
• Scroll reveals use intersection-triggered opacity/transform with the captured durations (0.3 / 0.5s) and easings — wrap in a reduced-motion guard
• The bouncy cubic-bezier(0.34, 1.56, 0.64, 1) translate entrance is a CSS transition, not a spring — keep it deterministic and selective
• Fonts are self-hosted woff2 with font-display: swap (Goga, Inter Variable, Fira Mono) — no Google Fonts CDN dependency
• Logo marquees use a single @keyframes translate loop at 80s linear; pause on prefers-reduced-motion

• Keep the acid-green accent (#7fee64) scarce — CTAs, links, focus rings, and gradient glows only; verify its surface area stays small against the black.
• Use green radial gradients as ambient light sources behind content at single-digit-to-40% opacity, never as a content fill.
• Reach for a 1px solid hairline border before any drop shadow on the dark canvas.
• Use the monospace (Fira Mono) for all code, kbd, and technical identifiers to hold the developer register.
• Pair the green/teal with text or icon for any state signal — never color alone.
• Default to cubic-bezier(0.4, 0, 0.2, 1) for routine transitions; reserve the bouncy cubic-bezier(0.34, 1.56, 0.64, 1) for selective entrance personality.
• Pass every page through useReducedMotion and verify the forced-colors fallback before shipping.

• Never flood large surfaces with the acid green — it is a pointer, not a paint. Its power is scarcity against #000000.
• Never port the green radial-glow stack onto a light background — these gradients are calibrated for a near-black canvas; on white they turn muddy.
• Never substitute a generic blue or purple for the brand green — the single acid-green accent IS the brand.
• Never introduce a fourth font family — the Goga (display) / Inter Variable (body) / Fira Mono (code) trio is the boundary.
• Never apply the bouncy overshoot curve to every interaction — selective use is what keeps it confident rather than nervous.
• Never invent durations outside the captured set {0.15, 0.3, 0.5, 0.6, 0.9}s or easings beyond {cubic-bezier(0.4,0,0.2,1), cubic-bezier(0,0,0.2,1), cubic-bezier(0.34,1.56,0.64,1), ease-out}.
• Never animate `height: auto` — use measured transforms or scaleY.

• Tailwind v4 @theme inline only — no runtime style concatenation, no CSS-in-JS.
• Spacing base 2px, scale 2/4/6/8/10/12/16/18/20/24/28/32.
• Container max 1400px — do not exceed (368px narrow rail for bounded clusters).
• Three font families only: Goga (display) + Inter Variable (body) + Fira Mono (code).
• Weight ladder: Goga 400/500, Inter Variable 400/500, Fira Mono 400/500/700.
• Color: #000000 / #181818 canvas, #ddffdc / #5b6d5c text, #7fee64 brand accent + #10a550 secondary; light inversion #def0dd only where deliberate.
• Motion: four captured easings (cubic-bezier(0.4,0,0.2,1) primary, cubic-bezier(0,0,0.2,1), cubic-bezier(0.34,1.56,0.64,1) bouncy, ease-out) and five durations (0.15/0.3/0.5/0.6/0.9s). No springs.
• Radius scale: 4 / 8 / 11 / 12 / 25 px.
• Borders: 1px solid hairline is the dominant elevation; drop shadows soft and rare (≤ 0.1 opacity).

• Container width: no page exceeds 1400px wide.
• Spacing grep: no values outside the 2/4/6/8/10/12/16/18/20/24/28/32 ladder.
• Accent audit: #7fee64 appears only in CTAs, links, focus rings, and gradient glows — never as a large fill; total green surface area stays small.
• Font grep: only Goga (headings), Inter Variable (body), and Fira Mono (code) appear — no fourth family.
• Weight grep: Goga 400/500, Inter 400/500, Fira Mono 400/500/700 — no stray weights.
• Transition timing grep: values draw from {cubic-bezier(0.4,0,0.2,1), cubic-bezier(0,0,0.2,1), cubic-bezier(0.34,1.56,0.64,1), ease-out}; the bouncy curve appears only on selective entrances.
• Transition duration grep: values draw from {0.15s, 0.3s, 0.5s, 0.6s, 0.9s}.
• Shadow / border audit: every elevation uses a 1px solid hairline first; drop shadows ≤ 0.1 opacity.
• Gradient audit: green radial glows sit behind content at single-digit-to-40% opacity, never as a content fill, never on a light background.
• Contrast audit: #ddffdc on #000000 ≥ 4.5:1 (AAA); muted #5b6d5c reserved for large/de-emphasized text only.
• Tracking audit: body and UI text use -0.36px tracking; large Goga headings use normal tracking.