Hermes Agent — Implementation Notes
The original site uses proprietary fonts. For self-contained HTML output, use these CDN substitutes: - Primary:
Geist| Mono:Geist Mono- Font stack (CSS):font-family: 'Geist', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;- Mono stack (CSS):font-family: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;html <link href="https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600&family=Geist+Mono:wght@400;500&display=swap" rel="stylesheet">Usewrite_fileto create HTML, serve viagenerative-widgetsskill (cloudflared tunnel). Verify visual accuracy withbrowser_visionafter generating.
Resend's website is a dark, cinematic canvas that treats email infrastructure like a luxury product. The entire page is draped in pure black (#000000) with text that glows in near-white (#f0f0f0), creating a theater-like experience where content performs on a void stage. This isn't the typical developer-tool darkness — it's the controlled darkness of a photography gallery, where every element is lit with intention and nothing competes for attention.
The typography system is the star of the show. Three carefully chosen typefaces create a hierarchy that feels both editorial and technical: Domaine Display (a Klim Type Foundry serif) appears at massive 96px for hero headlines with barely-there line-height (1.00) and negative tracking (-0.96px), creating display text that feels like a magazine cover. ABC Favorit (by Dinamo) handles section headings with an even more aggressive letter-spacing (-2.8px at 56px), giving a compressed, engineered quality to mid-tier text. Inter takes over for body and UI, providing the clean readability that lets the display fonts shine. Commit Mono rounds out the family for code blocks.
What makes Resend distinctive is its icy, blue-tinted border system. Instead of neutral gray borders, Resend uses rgba(214, 235, 253, 0.19) — a frosty, slightly blue-tinted line at 19% opacity that gives every container and divider a cold, crystalline quality against the black background. Combined with pill-shaped buttons (9999px radius), multi-color accent system (orange, green, blue, yellow, red — each with its own CSS variable scale), and OpenType stylistic sets ("ss01", "ss03", "ss04", "ss11"), the result is a design system that feels premium, precise, and quietly confident.
Key Characteristics:
- Pure black background with near-white (#f0f0f0) text — theatrical, gallery-like darkness
- Three-font hierarchy: Domaine Display (serif hero), ABC Favorit (geometric sections), Inter (body/UI)
- Icy blue-tinted borders: rgba(214, 235, 253, 0.19) — every border has a cold, crystalline shimmer
- Multi-color accent system: orange, green, blue, yellow, red — each with numbered CSS variable scales
- Pill-shaped buttons and tags (9999px radius) with transparent backgrounds
- OpenType stylistic sets ("ss01", "ss03", "ss04", "ss11") on display fonts
- Commit Mono for code — monospace as a design element, not an afterthought
- Whisper-level shadows using blue-tinted ring: rgba(176, 199, 217, 0.145) 0px 0px 0px 1px
#000000): Page background, the defining canvas color (95% opacity via --color-black-12)#f0f0f0): Primary text, button text, high-contrast elements#ffffff): --color-white, maximum emphasis text, link highlights#ff5900): --color-orange-4, at 22% opacity — subtle warm glow#ff801f): --color-orange-10, primary orange accent — warm, energetic#ffa057): --color-orange-11, lighter orange for secondary use#22ff99): --color-green-3, at 12% opacity — faint emerald wash#11ff99): --color-green-4, at 18% opacity — success indicator glow#0075ff): --color-blue-4, at 34% opacity — medium blue accent#0081fd): --color-blue-5, at 42% opacity — stronger blue#3b9eff): --color-blue-10, bright blue — links, interactive elements#ffc53d): --color-yellow-9, warm gold for warnings or highlights#ff2047): --color-red-5, at 34% opacity — error states, destructive actions#a1a4a5): Secondary text, muted links, descriptions#464a4d): Tertiary text, de-emphasized content#5c5c5c): Hover states, subtle emphasis#494949): Quaternary text#f8f8f8): Light mode surface (if applicable)#eaeaea): Light context borders#ececec): Subtle borders on light surfaces#dedfdf): Light dividers#e5e6e6): Alternate light border#fcfdff): Primary color token (slight blue tint, 94% opacity)rgba(255, 255, 255, 0.28)): Button hover state on darkoklab(0.999994 ... / 0.577)): Semi-transparent white for muted textoklab(0.999994 ... / 0.642)): Slightly brighter semi-transparent whitergba(214, 235, 253, 0.19)): The signature — icy blue-tinted borders at 19% opacityrgba(217, 237, 254, 0.145)): Slightly lighter variant for list itemsrgba(176, 199, 217, 0.145) 0px 0px 0px 1px): Blue-tinted shadow-as-borderrgb(0, 0, 0) 0px 0px 0px 8px): Heavy black focus ringrgba(0, 0, 0, 0.1) 0px 1px 3px, rgba(0, 0, 0, 0.1) 0px 1px 2px -1px): Minimal card elevationdomaine (Domaine Display by Klim Type Foundry) — hero headlinesaBCFavorit (ABC Favorit by Dinamo), fallbacks: ui-sans-serif, system-ui — section headingsinter, fallbacks: ui-sans-serif, system-ui — body text, buttons, navigationcommitMono, fallbacks: ui-monospace, SFMono-Regular, Menlo, Monaco, ConsolasHelvetica — fallback for specific UI contexts-apple-system, system-ui, Segoe UI, Roboto — embedded content| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|---|---|---|---|---|---|---|
| Display Hero | domaine | 96px (6.00rem) | 400 | 1.00 (tight) | -0.96px | "ss01", "ss04", "ss11" |
| Display Hero Mobile | domaine | 76.8px (4.80rem) | 400 | 1.00 (tight) | -0.768px | Scaled for mobile |
| Section Heading | aBCFavorit | 56px (3.50rem) | 400 | 1.20 (tight) | -2.8px | "ss01", "ss04", "ss11" |
| Sub-heading | aBCFavorit | 20px (1.25rem) | 400 | 1.30 (tight) | normal | "ss01", "ss04", "ss11" |
| Sub-heading Compact | aBCFavorit | 16px (1.00rem) | 400 | 1.50 | -0.8px | "ss01", "ss04", "ss11" |
| Feature Title | inter | 24px (1.50rem) | 500 | 1.50 | normal | Section sub-headings |
| Body Large | inter | 18px (1.13rem) | 400 | 1.50 | normal | Introductions |
| Body | inter | 16px (1.00rem) | 400 | 1.50 | normal | Standard body text |
| Body Semibold | inter | 16px (1.00rem) | 600 | 1.50 | normal | Emphasis, active states |
| Nav Link | aBCFavorit | 14px (0.88rem) | 500 | 1.43 | 0.35px | "ss01", "ss03", "ss04" — positive tracking |
| Button / Link | inter | 14px (0.88rem) | 500–600 | 1.43 | normal | Buttons, nav, CTAs |
| Caption | inter | 14px (0.88rem) | 400 | 1.60 (relaxed) | normal | Descriptions |
| Helvetica Caption | Helvetica | 14px (0.88rem) | 400–600 | 1.00–1.71 | normal | UI elements |
| Small | inter | 12px (0.75rem) | 400–500 | 1.33 | normal | Tags, meta, fine print |
| Small Uppercase | inter | 12px (0.75rem) | 500 | 1.33 | normal | text-transform: uppercase |
| Small Capitalize | inter | 12px (0.75rem) | 500 | 1.33 | normal | text-transform: capitalize |
| Code Body | commitMono | 16px (1.00rem) | 400 | 1.50 | normal | Code blocks |
| Code Small | commitMono | 14px (0.88rem) | 400 | 1.43 | normal | Inline code |
| Code Tiny | commitMono | 12px (0.75rem) | 400 | 1.33 | normal | Small code labels |
| Heading (Helvetica) | Helvetica | 24px (1.50rem) | 400 | 1.40 | normal | Alternate heading context |
"ss01", "ss03", "ss04", "ss11" stylistic sets are enabled on all ABC Favorit and Domaine text, activating alternate glyphs that give Resend's typography its unique character.Primary Transparent Pill
- Background: transparent
- Text: #f0f0f0
- Padding: 5px 12px
- Radius: 9999px (full pill)
- Border: 1px solid rgba(214, 235, 253, 0.19) (frost border)
- Hover: background rgba(255, 255, 255, 0.28) (white glass)
- Use: Primary CTA on dark backgrounds
White Solid Pill
- Background: #ffffff
- Text: #000000
- Padding: 5px 12px
- Radius: 9999px
- Use: High-contrast CTA ("Get started")
Ghost Button
- Background: transparent
- Text: #f0f0f0
- Radius: 4px
- No border
- Hover: subtle background tint
- Use: Secondary actions, tab items
1px solid rgba(214, 235, 253, 0.19) (frost border)rgba(176, 199, 217, 0.145) 0px 0px 0px 1px (ring shadow)#f0f0f0 on dark, #000000 on light1px solid rgba(214, 235, 253, 0.19)Tab Navigation - Horizontal tabs with subtle selection indicator - Tab items: 8px radius - Active state with subtle background differentiation
Code Preview Panels
- Dark code blocks using Commit Mono
- Frost borders (rgba(214, 235, 253, 0.19))
- Syntax-highlighted with multi-color accent tokens (orange, blue, green, yellow)
Multi-color Accent Badges - Each product feature has its own accent color from the CSS variable scale - Badges use the accent color at low opacity (12–42%) for background, full opacity for text
| Level | Treatment | Use |
|---|---|---|
| Flat (Level 0) | No shadow, transparent background | Default — most elements on dark void |
| Ring (Level 1) | rgba(176, 199, 217, 0.145) 0px 0px 0px 1px |
Shadow-as-border for cards, containers |
| Frost Border (Level 1b) | 1px solid rgba(214, 235, 253, 0.19) |
Explicit borders — buttons, dividers, tabs |
| Subtle (Level 2) | rgba(0, 0, 0, 0.1) 0px 1px 3px, rgba(0, 0, 0, 0.1) 0px 1px 2px -1px |
Light card elevation |
| Focus (Level 3) | rgb(0, 0, 0) 0px 0px 0px 8px |
Heavy black focus ring — accessibility |
Shadow Philosophy: Resend barely uses shadows at all. On a pure black background, traditional shadows are invisible — you can't cast a shadow into the void. Instead, Resend creates depth through its signature frost borders (rgba(214, 235, 253, 0.19)) — thin, icy blue-tinted lines that catch light against the darkness. This creates a "glass panel floating in space" aesthetic where borders are the primary depth mechanism.
#000000) as the page background — the void is the canvasrgba(214, 235, 253, 0.19)) for all structural lines — they're the blue-tinted signature"ss01", "ss04", "ss11" on Domaine and ABC Favorit text0px 0px 0px 1px) — on black, traditional shadows don't work#000000 — the pure black void is non-negotiable| Name | Width | Key Changes |
|---|---|---|
| Mobile Small | <480px | Single column, tight padding, 76.8px hero |
| Mobile | 480–600px | Standard mobile, stacked layout |
| Desktop | >600px | Full layout, 96px hero, expanded sections |
Note: Resend uses a minimal breakpoint system — only 480px and 600px detected. The design is desktop-first with a clean mobile collapse.
#000000)#f0f0f0)#a1a4a5)rgba(214, 235, 253, 0.19))#ff801f#11ff99 (at 18% opacity)#3b9effrgb(0, 0, 0) 0px 0px 0px 8pxrgba(214, 235, 253, 0.19)) are the universal structural element — not gray, not neutral