jiffies-css

Post-Modern CSS Full-Page Reset

Demo Page

Principles

• Beautiful styles for semantic base elements
• Components via relationships of semantic elements
• Aria roles for selecting between component modalities
• Express DOM states in visual style
• User configuration via CSS Variables
• User extension with targeted layers
• Opinionated tables, whitespace, & nav
• Responsive typography & container layouts; flexbox & css grid native utilities
• Pure-CSS Accordions, Tabs
• Accessible & Responsive

Inspiration

• Pico.css
• Primitive UI
• Skeleton
• Cloudscape foundations
• Material design tokens

2023 Standards

• @nest
• color-mix()
• env() for user-defined (not user-agent) (spec)
• :has
• hwb

Fonts

• Body: Poppins
• Text Header: Libre Baskerville
• App Header: Roboto
• Tables: Trebuchet MS
• Code: JetBrains Mono

Layers

• reset Base browser resets.
• theme Define root variables.
• layout Base semantic layout features.
• content Styles for built-in browser elements.
• components Opinionated, robust components
• utility Class-based helper utilities.
• user Untouched layer for users to override all properties.

Reset

• Sanitize.css
• Reduced Motion
• Content
• Containers body (> #root) > { main, header, footer, aside }(.fluid)
• Overflow scrolling figure(.scroll-{x,y})
• Block Typography html hgroup h1 h2 h3 h4 h5 h6 p ul ol blockquote textarea
• Inline Typography a[.secondary,.contrast] abbr strong b em i cite del ins kbd mark s small sub sub u
• Buttons button a[role=button] input[type={button,submit,reset]
• Forms label input select textarea label fieldset legend
  • \[aria-invalid] \[disabled] \[readonly]
• Toggles input\[type={checkbox,radio}]\[role=switch]
• Extended Forms input [type={color,date,file,search}]
• Tables table thead tbody tfoot tr th td

Components

• Card & Panel {article, section} > {main, header, footer}
• Accordion details { @nest summary }
• Tab details \[role=tablist] summary\[role=tab]
• Modal dialog
• Navigation nav > ol
  • Breadcrumb span:has(nav > ol) nav > ol
• Progress progress
• Property Sheet dl, dt, dd
• Form group fieldset\[role=group]

Layout

• Loading \[aria-busy=true]
• Tooltip \[data-tooltip][data-direction]
• Flex .flex .row .inline .flex-{0-4} .justify-{around, between, center} .align-{baseline, center, stretch, end}
• Grid

Accessibility

Responsive

Size	Breakpoint	Viewport	Columns	base
xs	0		1	12px
sm	510px	425px	1	14px
md	768px	700px	1	16px
lg	1024px	920px	2	18px
xl	1440px	1130px	2	20px
4k	2560px	2170px	4	24px

Selectors

component

element

state

Theming

Override variables.

• Color (color)
• Density
  • Spacing (spacing)
• Typography (font)
  • Iconography
• Motion

Constants

--phi-quart: 6.854 --phi-cube: 4.236 --phi-square: 2.618 --phi-3-2: 2.058 --phi: 1.618 --phi-half: 1.272 --phi-zero: 1 --phi-root: 0.786

Sizing

--sizing-base (responsive) --sizing- --spacing-block`

Typography

• --font-size: --sizing-base: (1rem), --font-height: calc(var(--phi) * 1em)

  • --font-size-heading-title --phi-cube <h1>
  • --font-size-heading-container --phi-square <h2>
  • --font-size-heading-section --phi-3-2 <h3>
  • --font-size-body --phi-zero <p>
  • --font-size-figure --phi-half <figure> <figcaption>

• --font-weight 400 Normal

  • --font-weight-heavy 700 Bold
  • --font-weight-light 300 Light

• --font-family Poppins

  • --font-family-heading Jet-Brains Mono
  • --font-family-monospace Libre Baskerville
  • --font-family-table Trebuchet

• --spacing Unitless spacing multiplier for margins and paddings. 1 = comfortable, .5 = compact

  • --spacing-block-horizontal, --spacing-block-vertical Modify vertical and horizontal density separately

• --border-radius-container .5rem

• --border-radius-item .25rem

  • --border-radius-button
  • --border-radius-input

• --border-radius-inline .125rem

  • --border-radius-badge

Color

Full colors

• --white
• --black

Color part variables

• --primary-luminance
• --primary-chroma
• --color-primary-hue
• --color-form-base
  • --color-form-invalid
  • --color-form-disabled
  • --color-form-required

Color Functions

• --color

Motion

• --motion-duration-snap 115MS
• --motion-duration-shake 165MS
• --motion-duration-draw 250MS
• --motion-curve-smooth (0.00, 0.00, 0.00, 1.00)
• --motion-curve-sticky (1.00, 0.00, 0.83, 1.00)
• --motion-curve-draw (0.84, 0.00, 0.16, 1.00)