---
version: "alpha"
name: "Cartesian"
description: "Cartesian — Quiet warm-neutral palette with classical Playfair serifs; tasteful and unhurried. Tipografia Playfair Display. warm bone and stone neutrals only. Ideal para investment thesis, white paper, advisory deliverable. Prompt pronto para IA generativa."
colors:
  primary: "#EDE8E0"
  secondary: "#E2DBD1"
  tertiary: "#1A1A1A"
  neutral: "#5A5A5A"
  surface: "#8A8178"
  accent: "#B8B0A4"
typography:
  h1:
    fontFamily: Playfair Display
    fontSize: 2.25rem
    fontWeight: 700
  body-md:
    fontFamily: Inter
    fontSize: 1rem
    fontWeight: 400
  label-caps:
    fontFamily: Inter
    fontSize: 0.75rem
    fontWeight: 500
spacing:
  sm: 2.0rem
  md: 4.0rem
  lg: 8.0rem
components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.neutral}"
    padding: 12px
---

## Overview

Cartesian — Quiet warm-neutral palette with classical Playfair serifs; tasteful and unhurried. Tipografia Playfair Display. warm bone and stone neutrals only. Ideal para investment thesis, white paper, advisory deliverable. Prompt pronto para IA generativa.

- Density: 2/10 — Airy
- Variance: 8/10 — Complex
- Motion: 2/10 — Minimal

- **Style:** Warm-Minimal, Classical, Literary, Restrained
- **Keywords:** Warm neutrals, no saturated color, Playfair Display, classical, literary, restrained, tonal contrast, quiet
- **Era:** Timeless Classic
- **Light/Dark:** ✓ Full / ✗ None

## Colors

- **Bg Primary** (#EDE8E0) — Primary surface or dominant color
- **Bg Secondary** (#E2DBD1) — Accent highlight, links and focus states
- **Text Primary** (#1A1A1A) — Secondary accent
- **Text Secondary** (#5A5A5A) — Accent color, emphasis elements
- **Accent** (#8A8178) — Extended palette, decorative use
- **Line** (#B8B0A4) — Background alternate

## Typography

- **Display / Hero:** Playfair Display — Weight 700, tight tracking, used for headline impact
- **Body:** Inter — Weight 400, 16px/1.6 line-height, max 72ch per line
- **UI Labels / Captions:** Inter — 0.875rem, weight 500, slight letter-spacing
- **Monospace:** JetBrains Mono — Used for code, metadata, and technical values

Scale:
- Hero: clamp(2.5rem, 5vw, 4rem)
- H1: 2.25rem
- H2: 1.5rem
- Body: 1rem / 1.6
- Small: 0.875rem

## Layout

- **Grid:** CSS Grid primary. Max-width containment: 1280px centered with 1.5rem side padding.
- **Spacing rhythm:** Balanced. Base unit: 0.5rem (8px).
- **Section vertical gaps:** clamp(4rem, 8vw, 8rem).
- **Hero layout:** Split-screen (text left, visual right).
- **Feature sections:** Zig-zag alternating text+image rows. No 3-equal-columns.
- **Mobile collapse:** All multi-column layouts collapse below 768px. No horizontal overflow.
- **z-index contract:** base (0) / sticky-nav (100) / overlay (200) / modal (300) / toast (500).

## Elevation & Depth

display font Playfair Display for hero headlines, subtle hover (opacity 0.8, 200ms), refined focus rings, warm bone/stone neutrals, zero saturated color, classical Playfair contrast, generous whitespace, clamp(4rem,8vw,8rem) section gaps

- **Physics:** Ease-out curves, 200-300ms duration. Smooth and predictable.
- **Entry animations:** Fade + translate-Y (16px → 0) over 420ms ease-out. Staggered cascades for lists: 80ms between items.
- **Hover states:** Subtle color shift + shadow adjustment over 200ms.
- **Page transitions:** Fade only (200ms).
- **Performance:** Only transform and opacity animated. No layout-triggering properties.

## Shapes

Base corner radius: 4px. See rounded tokens in front matter for the full scale.

## Components

- **Primary Button:** 4px border-radius. Accent color fill. Hover: 8% darken + subtle lift shadow. Active: -1px translate tactile press. Font weight 600. No outer glows.
- **Secondary / Ghost Button:** Outline variant. 1.5px border in muted color. Text in primary color. Hover: subtle background fill.
- **Cards:** 4px corners. Surface background. Subtle shadow (0 2px 12px rgba(0,0,0,0.06)). 1px border stroke.
- **Inputs:** Label above input. 1px border stroke. Focus ring: 2px accent color offset 2px. Error text below in semantic red. No floating labels.
- **Navigation:** Primary surface background. Active item: accent color indicator. Font weight 500 when active.
- **Skeletons:** Shimmer animation matching component dimensions. No circular spinners.
- **Empty States:** Icon-based composition with descriptive text and action button.

## Do's and Don'ts

- No emojis in UI — use icon system only (Lucide, Heroicons)
- No pure black (#000000) — use off-black or charcoal variants
- No oversaturated accent colors (saturation cap: 80%)
- No 3-column equal-width feature layouts — use zig-zag or asymmetric grid
- No `h-screen` — use `min-h-[100dvh]`
- No AI copywriting clichés: "Elevate", "Seamless", "Unleash", "Next-Gen"
- No broken external image links — use picsum.photos or inline SVG
- No generic lorem ipsum in demos

- Do Playfair Display display font loaded via Google Fonts
- Do Color palette variables applied consistently
- Do Typography scale: hero clamp(2.5rem,5vw,4rem)
- Do H1 2.25rem
- Do body 1rem/1.6
- Do WCAG AA contrast ratio verified (4.5:1 body text)
- Do Serif typography hierarchy clear (display vs body)
- Do Whitespace generous — section gaps ≥ 5rem
- Do Mobile responsive layout (stack below 768px)

## Use Case

Tese de investimento, White paper, Entregável consultivo, Relatório de pesquisa, Pitch de livro / longform, Galeria e cultura

<!-- Source: https://designmd.app.br/library/cartesian · designmd.app -->