AV01 design system

---
version: alpha
name: AV01
description: "Dark monochrome interface measured from av01.media: system-ui type with Arimo, tonal surfaces and pill-shaped controls."
colors:
  background: "#111827"
  surface: "#111827"
  on-surface: "#9CA3AF"
  on-background: "#9CA3AF"
  on-surface-strong: "#FFFFFF"
  on-surface-variant: "#6B7280"
  surface-container-low: "#000000"
  overlay: "#00000099"
  outline: "#1F2937"
  outline-variant: "#374151"
  primary: "#9CA3AF"
  on-primary: "#000000"
  secondary: "#0891B2"
  error: "#F87171"
typography:
  headline-display:
    fontFamily: system-ui
    fontSize: 24px
    fontWeight: 700
    lineHeight: 1.33
  body-md:
    fontFamily: Arimo
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  body-sm:
    fontFamily: system-ui
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.33
  label-md:
    fontFamily: system-ui
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
rounded:
  sm: 4px
  md: 8px
  lg: 10px
  full: 9999px
spacing:
  base: 4px
  xs: 4px
  sm: 8px
  md: 16px
  lg: 32px
  xl: 48px
  gutter: 16px
components:
  button-primary:
    textColor: "{colors.on-surface-strong}"
    rounded: "{rounded.lg}"
    padding: 5px 12px
    height: 31px
  button-ghost:
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-md}"
    rounded: "{rounded.md}"
    padding: 8px
  input-field:
    backgroundColor: "{colors.background}"
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-md}"
    rounded: "{rounded.full}"
    padding: 8px 48px 8px 16px
---

# AV01 Design System

## Overview

AV01 describes itself as: “高品質なエロ動画を無料でストリーミング。ダウンロード不要で、いつでもどこでも視聴可能” The interface is dark, built on **Deep Blue (#111827)** with **Blue (#9CA3AF)** text and almost no color: actions are carried by contrast, not hue.

Type is set in **system-ui** and **Arimo**. Headlines run large; body text is 16px. Depth comes from soft drop shadows. Controls are pill-shaped.

Measured from [av01.media/jp](https://www.av01.media/jp) (the site sent our reader to its /jp version; av01.media was asked for) on November 6, 2026 at 1440×900 and 390×844 from 283 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 12 roles, plus gradient stops #FF7A00, #FF3B2F, #FF4FC3, #8F3CFF.

- **Deep Blue (#111827):** Page background, seen 1 time. Token `background`.
- **Blue (#9CA3AF):** Primary text and headings, seen 101 times. Token `on-surface`.
- **White (#FFFFFF):** Headings and emphasis, seen 30 times. Token `on-surface-strong`, CSS `--tw-ring-offset-color`.
- **Cool Slate (#6B7280):** Secondary text, seen 11 times. Token `on-surface-variant`.
- **Near Black (#000000):** Raised areas one step from the page, seen 2 times. Token `surface-container-low`.
- **Near Black 60% (#00000099):** Translucent fill for cards and controls, seen 1 time. Token `overlay`.
- **Deep Blue (#1F2937):** Borders and dividers, seen 2 times. Token `outline`.
- **Dark Blue (#374151):** Secondary dividers, seen 1 time. Token `outline-variant`.
- **Blue (#9CA3AF):** Primary actions (the main text color; the palette is monochrome), seen 101 times. Token `primary`.
- **Near Black (#000000):** Text and icons on primary. Token `on-primary`.
- **Dark Cyan (#0891B2):** Accent on large areas. Token `secondary`.
- **Light Red (#F87171):** Errors and destructive states, seen 3 times. Token `error`.

## Typography

**system-ui** and **Arimo** share the interface. Fallback stack: `ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont`. Other loaded fonts: Inter.

- **headline-display:** system-ui 24px at weight 700, line height 1.33. Page title (h1).
- **body-md:** Arimo 16px at weight 400, line height 1.5. Body text.
- **body-sm:** system-ui 12px at weight 400, line height 1.33. Secondary and small text.
- **label-md:** system-ui 16px at weight 400, line height 1.5. Buttons, navigation and labels.

## Layout

Spacing follows a 4px grid: 96% of measured gaps and paddings are multiples of 4px.

- **Scale:** xs 4px, sm 8px, md 16px, lg 32px, xl 48px.
- **Gaps:** 16px is the most common gap in flex and grid layouts.
- **Breakpoints:** 576px, 599px, 640px, 768px, 980px, 1024px, 1280px, 1536px.

## Elevation & Depth

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

- `rgba(255, 80, 160, 0.45) 0px 0px 10px 0px`

## Shapes

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

- **full (9999px):** 8 elements.
- **sm (4px):** 4 elements.
- **md (8px):** 4 elements.
- **lg (10px):** 4 elements.

## Components

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

- **button-primary (“ライブセックス配信”):** transparent fill, #FFFFFF text, 14px/600, 10px radius, padding 5px 12px, shadow `rgba(255, 80, 160, 0.45) 0px 0px 10px 0px`.
- **button-ghost (“🇯🇵 日本語”):** transparent fill, #FFFFFF text, 16px/400, 8px radius, padding 8px.
- **input-field (“検索...”):** #111827 fill, #FFFFFF text, 16px/400, 9999px radius, padding 8px 48px 8px 16px, border 1px solid #374151.

## Do's and Don'ts

- Do use #111827 for the page and lift surfaces in small steps: #000000.
- Do keep text in 3 levels: #9CA3AF, #FFFFFF, #6B7280.
- Do let contrast carry emphasis; primary actions use #9CA3AF on #111827.
- Do keep spacing on the 4px grid.
- Do make buttons and chips fully rounded (9999px); most other elements use 4px corners.
- Don't use #6B7280 for body text; it reaches 3.67:1 on #111827. Keep it for large text or metadata.
- Don't introduce new font families beyond system-ui and Arimo.
- Don't add saturated accent colors; the measured palette is almost entirely neutral.
- Don't make interface transitions slower than 0.3s.

## Motion

Interface transitions are quick: 0.15s, 0.3s, 0.2s. Longer ambient animations run 10s.

- **Easing:** `cubic-bezier(0.4, 0, 0.2, 1)`, `ease`, `linear`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/av01.media/), the free DESIGN.md generator (engine 2026.10.29+b828a475ee10).