YAAS Energy design system

---
version: alpha
name: YAAS Energy
description: "Dark monochrome interface measured from yaas-energy.com: Soledago type with Helvetica Neue, tonal surfaces and 20px corners."
colors:
  background: "#0B0A09"
  surface: "#0B0A09"
  on-surface: "#FFFFFF"
  on-background: "#FFFFFF"
  on-surface-variant: "#DBDADA"
  surface-container-low: "#212121"
  overlay: "#D9D9D90D"
  outline: "#212121"
  primary: "#FFFFFF"
  on-primary: "#212121"
  secondary: "#E53A6B"
  tertiary: "#0085C6"
typography:
  headline-display:
    fontFamily: Soledago
    fontSize: 92px
    fontWeight: 400
    lineHeight: 1.1
    letterSpacing: -0.02em
  headline-lg:
    fontFamily: Soledago
    fontSize: 60px
    fontWeight: 400
    lineHeight: 1.1
    letterSpacing: -0.025em
  headline-md:
    fontFamily: Soledago
    fontSize: 41px
    fontWeight: 400
    lineHeight: 1.1
    letterSpacing: -0.02em
  headline-sm:
    fontFamily: Helvetica Neue
    fontSize: 32px
    fontWeight: 700
  body-md:
    fontFamily: Helvetica Neue
    fontSize: 16px
    fontWeight: 400
  label-lg:
    fontFamily: Bounded
    fontSize: 16px
    fontWeight: 500
    letterSpacing: -0.013em
  label-md:
    fontFamily: Bounded
    fontSize: 13px
    fontWeight: 500
    lineHeight: 1.2
  label-sm:
    fontFamily: Bounded
    fontSize: 12px
    fontWeight: 500
    lineHeight: 1.5
  headline-lg-mobile:
    fontFamily: Soledago
    fontSize: 40px
    fontWeight: 400
    lineHeight: 1.1
    letterSpacing: -0.025em
  headline-md-mobile:
    fontFamily: Soledago
    fontSize: 26px
    fontWeight: 400
    lineHeight: 1.1
    letterSpacing: -0.02em
rounded:
  sm: 10px
  md: 20px
  lg: 100px
  full: 9999px
spacing:
  sm: 8px
  md: 10px
  lg: 25.61px
  xl: 51.22px
  gutter: 20px
  section: 122.94px
  container: 1440px
components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label-lg}"
    rounded: "{rounded.lg}"
    padding: 10px 20px
    height: 38px
  button-outline:
    backgroundColor: "{colors.overlay}"
    textColor: "{colors.on-surface}"
    typography: "{typography.label-lg}"
    rounded: "{rounded.lg}"
    padding: 8px 20px
    height: 34px
  button-ghost:
    textColor: "{colors.on-primary}"
    typography: "{typography.label-md}"
    rounded: "{rounded.lg}"
    padding: 8.2px 14.34px
  link:
    textColor: "{colors.on-primary}"
---

# YAAS Energy Design System

## Overview

YAAS Energy describes itself as: “YAAS — zero-sugar, 5-calorie energy drink in 5 bold flavors: Citrus Lemon, Blueberry Rush, Wild Strawberry, Solar Orange, Green Apple. No crash.” The interface is dark, built on **Near Black (#0B0A09)** with **White (#FFFFFF)** text and almost no color: actions are carried by contrast, not hue.

Type is set in **Soledago** and **Helvetica Neue**. Headlines run large with tight negative tracking; body text is 16px. The surface language is flat. Corners are mostly 20px.

Measured from [yaas-energy.com](https://yaas-energy.com/) on November 5, 2026 at 1440×900 and 390×844 from 199 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 10 roles, plus gradient stops #E53A6B, #A8194B, #0085C6, #00517A.

- **Near Black (#0B0A09):** Page background, seen 1 time. Token `background`.
- **White (#FFFFFF):** Primary text and headings, seen 47 times. Token `on-surface`, CSS `--ink`.
- **Silver (#DBDADA):** Secondary text, seen 5 times. Token `on-surface-variant`, CSS `--ink-soft`.
- **Charcoal (#212121):** Raised areas one step from the page, seen 17 times. Token `surface-container-low`, CSS `--ink-on-light`.
- **Silver 5% (#D9D9D90D):** Translucent fill for cards and controls, seen 10 times. Token `overlay`.
- **Charcoal (#212121):** Borders and dividers, seen 2 times. Token `outline`, CSS `--ink-on-light`.
- **White (#FFFFFF):** Primary buttons and calls to action, seen 67 times. Token `primary`, CSS `--ink`.
- **Charcoal (#212121):** Text and icons on primary. Token `on-primary`.
- **Pink (#E53A6B):** Accent in text, fills and borders, seen 12 times. Token `secondary`.
- **Cyan (#0085C6):** Accent in text, fills and borders, seen 2 times. Token `tertiary`.

## Typography

**Soledago**, **Helvetica Neue** and **Bounded** share the interface. Fallback stack: `Soledago, Arial Narrow, system-ui, -apple-system`. Other loaded fonts: Soledago PL.

- **headline-display:** Soledago 92px at weight 400, line height 1.1, tracking -0.02em. Page title (h1).
- **headline-lg:** Soledago 60px at weight 400, line height 1.1, tracking -0.025em (40px on mobile). Section headings (h2).
- **headline-md:** Soledago 41px at weight 400, line height 1.1, tracking -0.02em (26px on mobile). Sub-section headings.
- **headline-sm:** Helvetica Neue 32px at weight 700. Card and feature titles.
- **body-md:** Helvetica Neue 16px at weight 400. Body text.
- **label-lg:** Bounded 16px at weight 500, tracking -0.013em. Large buttons and tabs.
- **label-md:** Bounded 13px at weight 500, line height 1.2. Buttons, navigation and labels.
- **label-sm:** Bounded 12px at weight 500, line height 1.5. Small labels and badges.

## Layout

Spacing does not follow a strict grid: 28% of measured values are multiples of 4px, so match the measured steps rather than rounding to a grid.

- **Scale:** sm 8px, md 10px, lg 25.61px, xl 51.22px.
- **Sections:** 122.94px vertical padding between major sections.
- **Gaps:** 20px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 1440px.
- **Breakpoints:** 599px, 639px, 640px, 959px, 960px, 1023px, 1199px, 1200px.

## Elevation & Depth

The design is flat: no shadows were measured. Hierarchy comes from tonal surface steps (#212121) and #212121 borders.

## Shapes

Most elements use 20px corners. Measured radii, most used first:

- **md (20px):** 56 elements.
- **lg (100px):** 52 elements.
- **sm (10px):** 16 elements.
- **full (9999px):** 4 elements.

## Components

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

- **button-primary (“See the Flavors →”):** #FFFFFF fill, #212121 text, 16px/500, 100px radius, padding 10px 20px, border 1px solid #FFFFFF.
- **button-outline (“Flavors”):** #D9D9D90D fill, #FFFFFF text, 16px/500, 100px radius, padding 8px 20px, border 1px solid #FFFFFF.
- **button-ghost (“No thanks”):** transparent fill, #212121 text, 13.3181px/500, 100px radius, padding 8.2px 14.34px, border 1px solid #212121.
- **link:** transparent fill, #212121 text, padding 0px.

## Do's and Don'ts

- Do use #0B0A09 for the page and lift surfaces in small steps: #212121.
- Do keep text in 2 levels: #FFFFFF, #DBDADA.
- Do let contrast carry emphasis; primary actions use #FFFFFF on #0B0A09.
- Do set headlines in Soledago with tight tracking (-0.02em).
- Do reuse the measured spacing steps (8px, 10px, 25.61px).
- Do use 20px corners on most elements; larger surfaces also use 100px and 10px.
- Don't add drop shadows for depth; use tonal surfaces.
- Don't introduce new font families beyond Soledago, Helvetica Neue and Bounded.
- Don't add saturated accent colors; the measured palette is almost entirely neutral.
- Don't make interface transitions slower than 0.25s.

## Motion

Interface transitions are quick: 0.2s, 0.25s. Longer ambient animations run 0.65s.

- **Easing:** `ease`, `cubic-bezier(0.22, 1, 0.36, 1)`.
- **Reduced motion:** the page responds to `prefers-reduced-motion`.

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