AI Website Detector design system

---
version: alpha
name: AI Website Detector
description: "Light interface measured from aiwebsitedetector.com: system-ui type, indigo accents, tonal surfaces and pill-shaped controls."
colors:
  background: "#F9FAFB"
  surface: "#F9FAFB"
  on-surface: "#4B5563"
  on-background: "#4B5563"
  on-surface-strong: "#111827"
  on-surface-variant: "#374151"
  on-surface-muted: "#9CA3AF"
  surface-container-low: "#FFFFFF"
  surface-container: "#F3F4F6"
  surface-container-high: "#EEF2FF"
  surface-container-highest: "#E0E7FF"
  overlay: "#FFFFFF1A"
  outline: "#E5E7EB"
  outline-variant: "#FFFFFF33"
  primary: "#36309A"
  on-primary: "#FFFFFF"
  secondary: "#4F46E5"
  tertiary: "#462797"
  success: "#4ADE80"
typography:
  headline-display:
    fontFamily: system-ui
    fontSize: 60px
    fontWeight: 700
    lineHeight: 1
  headline-lg:
    fontFamily: system-ui
    fontSize: 30px
    fontWeight: 700
    lineHeight: 1.2
  headline-md:
    fontFamily: system-ui
    fontSize: 24px
    fontWeight: 700
    lineHeight: 1.33
  body-md:
    fontFamily: system-ui
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.43
  body-lg:
    fontFamily: system-ui
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  label-lg:
    fontFamily: system-ui
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.5
  label-md:
    fontFamily: system-ui
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.43
  label-sm:
    fontFamily: system-ui
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.63
  headline-display-mobile:
    fontFamily: system-ui
    fontSize: 36px
    fontWeight: 700
    lineHeight: 1.25
rounded:
  sm: 4px
  md: 8px
  lg: 12px
  xl: 16px
  full: 9999px
spacing:
  xs: 4px
  sm: 8px
  md: 10px
  lg: 24px
  xl: 40px
  gutter: 8px
  section: 64px
  margin: 24px
  container: 1152px
components:
  button-outline:
    backgroundColor: "{colors.surface-container}"
    textColor: "{colors.on-surface-variant}"
    typography: "{typography.label-md}"
    rounded: "{rounded.full}"
    padding: 6px 12px
    height: 32px
  button-secondary:
    backgroundColor: "{colors.secondary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: 8px 16px
    height: 36px
  button-secondary-hover:
    backgroundColor: "#4338CA"
  button-ghost:
    backgroundColor: "{colors.overlay}"
    textColor: "#C7D2FE"
    typography: "{typography.label-sm}"
    rounded: "{rounded.full}"
    padding: 4px 10px
    height: 26px
  input-field:
    backgroundColor: "{colors.surface-container-low}"
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-lg}"
    rounded: "{rounded.lg}"
    padding: 16px 16px 16px 48px
  link:
    textColor: "{colors.on-surface-muted}"
---

# AI Website Detector Design System

## Overview

AI Website Detector describes itself as: “Free AI website detector — paste any URL to instantly check if it was built with Lovable, Bolt, Framer AI, Durable, Wix ADI, or 80+ AI builders. Get an AI probability score, verdict, and full tech-stack breakdown.” The interface is light, built on **Snow (#F9FAFB)** with **Dark Blue (#4B5563)** text, and **Indigo (#36309A)** as the main accent.

Type is set in **system-ui**. Headlines run large; body text is 14px. Depth comes from soft drop shadows. Controls are pill-shaped.

Measured from [aiwebsitedetector.com](https://aiwebsitedetector.com/) on November 7, 2026 at 1440×900 and 390×844 from 387 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 17 roles, plus gradient stops #312E81, #3730A3, #581C87.

- **Snow (#F9FAFB):** Page background, seen 4 times. Token `background`.
- **Dark Blue (#4B5563):** Primary text and headings, seen 36 times. Token `on-surface`.
- **Deep Blue (#111827):** Headings and emphasis, seen 32 times. Token `on-surface-strong`.
- **Dark Blue (#374151):** Secondary text, seen 16 times. Token `on-surface-variant`.
- **Blue (#9CA3AF):** Muted text and metadata, seen 44 times. Token `on-surface-muted`.
- **White (#FFFFFF):** Raised areas one step from the page, seen 24 times. Token `surface-container-low`, CSS `--background`.
- **Snow (#F3F4F6):** Cards and panels, seen 9 times. Token `surface-container`.
- **Cool Snow (#EEF2FF):** Hover and pressed fills, seen 6 times. Token `surface-container-high`.
- **Pale Blue (#E0E7FF):** Highest raised elements, seen 2 times. Token `surface-container-highest`.
- **White 10% (#FFFFFF1A):** Translucent fill for cards and controls, seen 9 times. Token `overlay`.
- **Cool Mist (#E5E7EB):** Borders and dividers, seen 22 times. Token `outline`.
- **White 20% (#FFFFFF33):** Secondary dividers, seen 9 times. Token `outline-variant`.
- **Indigo (#36309A):** Brand color in logos and imagery. Token `primary`.
- **White (#FFFFFF):** Text and icons on primary. Token `on-primary`.
- **Indigo (#4F46E5):** Secondary buttons, seen 28 times. Token `secondary`.
- **Dark Violet (#462797):** Accent in logos and imagery. Token `tertiary`.
- **Green (#4ADE80):** Success and positive states, seen 5 times. Token `success`.

## Typography

**system-ui** carries the whole interface. Fallback stack: `-apple-system, BlinkMacSystemFont, Segoe UI, Roboto`.

- **headline-display:** system-ui 60px at weight 700, line height 1 (36px on mobile). Page title (h1).
- **headline-lg:** system-ui 30px at weight 700, line height 1.2. Section headings (h2).
- **headline-md:** system-ui 24px at weight 700, line height 1.33. Sub-section headings.
- **body-md:** system-ui 14px at weight 400, line height 1.43. Body text.
- **body-lg:** system-ui 16px at weight 400, line height 1.5. Lead paragraphs.
- **label-lg:** system-ui 16px at weight 600, line height 1.5. Large buttons and tabs.
- **label-md:** system-ui 14px at weight 500, line height 1.43. Buttons, navigation and labels.
- **label-sm:** system-ui 12px at weight 400, line height 1.63. Small labels and badges.

## Layout

Spacing is mostly on a 4px grid (81% of measured values), with some off-grid steps. Match the measured scale rather than rounding everything.

- **Scale:** xs 4px, sm 8px, md 10px, lg 24px, xl 40px.
- **Sections:** 64px vertical padding between major sections.
- **Gaps:** 8px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 1152px.
- **Page margin:** 24px on each side of full-width sections.
- **Breakpoints:** 640px, 768px, 1024px, 1280px, 1536px.

## Elevation & Depth

Raised elements use soft drop shadows. The most used recipes:

- `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px`

## Shapes

Interactive controls are pill-shaped. Measured radii, most used first:

- **full (9999px):** 92 elements.
- **xl (16px):** 48 elements.
- **sm (4px):** 36 elements.
- **lg (12px):** 16 elements.
- **md (8px):** 8 elements.

## Components

Measured from the rendered page. Token values reference the tokens above.

- **button-outline (“Framer”):** #F3F4F6 fill, #374151 text, 14px/500, 9999px radius, padding 6px 12px.
- **button-secondary (“Detect a Site”):** #4F46E5 fill, #FFFFFF text, 14px/500, 8px radius, padding 8px 16px.
- **button-secondary-hover:** background #4338CA, text #FFFFFF on hover.
- **button-ghost (“nctmediagroup.com”):** #FFFFFF1A fill, #C7D2FE text, 12px/400, 9999px radius, padding 4px 10px, border 1px solid #FFFFFF33.
- **input-field (“Enter website URL (e.g. example.”):** #FFFFFF fill, #111827 text, 16px/400, 12px radius, padding 16px 16px 16px 48px, border 1px solid #E5E7EB, shadow `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px`.
- **link:** transparent fill, #9CA3AF text, padding 0px.

## Do's and Don'ts

- Do use #F9FAFB for the page and lift surfaces in small steps: #FFFFFF, #F3F4F6, #EEF2FF, #E0E7FF.
- Do keep text in 4 levels: #4B5563, #111827, #374151, #9CA3AF.
- Do use #36309A as the brand accent: header, logo and key highlights.
- Do reuse the measured spacing steps (8px, 10px, 24px).
- Do make buttons and chips fully rounded (9999px); most other elements use 16px corners.
- Don't use #9CA3AF for body text; it reaches 2.43:1 on #F9FAFB. Keep it for large text or metadata.
- Don't introduce new font families beyond system-ui.
- Don't use #36309A for large backgrounds or body text.
- Don't make interface transitions slower than 0.15s.

## Motion

Interface transitions are quick: 0.15s. Longer ambient animations run 2s.

- **Easing:** `cubic-bezier(0.4, 0, 0.2, 1)`, `cubic-bezier(0.4, 0, 0.6, 1)`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/aiwebsitedetector.com/), the free DESIGN.md generator (engine 2026.10.29+b828a475ee10).