コンテンツに自律的に適応するレイアウトとコンポジション、アップデートされたレイアウトプリミティブ

body {
  width: 960px;
}

body {
  max-width: 960px;
}

<div class="flow">
  <p>Nullam id dolor id nibh ultricies vehicula ut id elit. Nulla vitae elit libero, a pharetra augue.</p>
  <p>Nulla vitae elit libero, a pharetra augue. Cras justo odio, dapibus ac facilisis in, egestas eget quam.</p>
  <p style="--flow-space: 3em"><code>--flow-space</code> set with an inline style to 3em: <code>style="--flow-space: 3em"</code></p>
</div>

/*
FLOW COMPOSITION
Like the Every Layout stack: https://every-layout.dev/layouts/stack/
Info about this implementation: https://piccalil.li/quick-tip/flow-utility/
*/
.flow > * + * {
  margin-top: var(--flow-space, 1em);
}

<div class="wrapper">
  <p>I am centered and have a nice, consistent gutter.</p>
</div>

/*
WRAPPER COMPOSITION
A common wrapper/container
*/
.wrapper {
  margin-inline: auto;
  max-width: clamp(16rem, var(--wrapper-max-width, 100vw), 80rem);
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  position: relative;
}

<div class="cluster">
  <div>Item 1</div>
  <div>Item 2</div>
  <div>Item 3</div>
  <div>Item 4</div>
  <div>Item 5</div>
  <div>Item 6</div>
  <div>Item 7</div>
  <div>Item 8</div>
</div>

/*
CLUSTER
More info: https://every-layout.dev/layouts/cluster/
A layout that lets you distribute items with consitent
spacing, regardless of their size

CUSTOM PROPERTIES AND CONFIGURATION
--gutter (var(--space-s-m)): This defines the space
between each item.

--cluster-horizontal-alignment (flex-start) How items should align
horizontally. Can be any acceptable flexbox aligmnent value.

--cluster-vertical-alignment How items should align vertically.
Can be any acceptable flexbox alignment value.
*/

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gutter, var(--space-s-m));
  justify-content: var(--cluster-horizontal-alignment, flex-start);
  align-items: var(--cluster-vertical-alignment, center);
}

<div class="repel">
  <div>Item 1 repels item 2</div>
  <div>Item 2 repels item 1</div>
</div>

/*
REPEL
A little layout that pushes items away from each other where
there is space in the viewport and stacks on small viewports

CUSTOM PROPERTIES AND CONFIGURATION
--gutter (var(--space-s-m)): This defines the space
between each item.

--repel-vertical-alignment How items should align vertically.
Can be any acceptable flexbox alignment value.
*/
.repel {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: var(--repel-vertical-alignment, center);
  gap: var(--gutter, var(--space-s-m));
}

.repel[data-nowrap] {
  flex-wrap: nowrap;
}

<div class="sidebar">
  <div>I am the sidebar</div>
  <div class="flow">
    <h1>I am the content</h1>
    <p>Etiam porta sem malesuada magna mollis euismod. Cras mattis consectetur purus sit amet fermentum.</p>
    <p>Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Vestibulum id ligula porta felis euismod semper.</p>
  </div>
</div>

/*
SIDEBAR
More info: https://every-layout.dev/layouts/sidebar/
A layout that allows you to have a flexible main content area
and a "fixed" width sidebar that sits on the left or right.
If there is not enough viewport space to fit both the sidebar
width *and* the main content minimum width, they will stack
on top of each other

CUSTOM PROPERTIES AND CONFIGURATION
--gutter (var(--space-size-1)): This defines the space
between the sidebar and main content.

--sidebar-target-width (20rem): How large the sidebar should be

--sidebar-content-min-width(50%): The minimum size of the main content area

EXCEPTIONS
.sidebar[data-direction='rtl']: flips the sidebar to be on the right
*/
.sidebar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gutter, var(--space-s-l));
}

.sidebar > :first-child {
  flex-basis: var(--sidebar-target-width, 20rem);
  flex-grow: 1;
}

.sidebar > :last-child {
  flex-basis: 0;
  flex-grow: 999;
  min-width: var(--sidebar-content-min-width, 50%);
}

<div class="switcher">
  <div>Item 1</div>
  <div>Item 2</div>
</div>

/*
SWITCHER
More info: https://every-layout.dev/layouts/switcher/
A layout that allows you to lay **2** items next to each other
until there is not enough horizontal space to allow that.

CUSTOM PROPERTIES AND CONFIGURATION
--gutter (var(--space-size-1)): This defines the space
between each item

--switcher-target-container-width (40rem): How large the container
needs to be to allow items to sit inline with each other

--switcher-vertical-alignment How items should align vertically.
Can be any acceptable flexbox alignment value.
*/
.switcher {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gutter, var(--space-s-l));
  align-items: var(--switcher-vertical-alignment, flex-start);
}

.switcher > * {
  flex-grow: 1;
  flex-basis: calc((var(--switcher-target-container-width, 40rem) - 100%) * 999);
}

/* Max 2 items,
so anything greater than 2 is full width */
.switcher > :nth-child(n + 3) {
  flex-basis: 100%;
}

<div class="grid">
  <div>Item 1</div>
  <div>Item 2</div>
  <div>Item 3</div>
  <div>Item 4</div>
  <div>Item 5</div>
  <div>Item 6</div>
  <div>Item 7</div>
  <div>Item 8</div>
</div>

/* AUTO GRID
Related Every Layout: https://every-layout.dev/layouts/grid/
More info on the flexible nature: https://piccalil.li/tutorial/create-a-responsive-grid-layout-with-no-media-queries-using-css-grid/
A flexible layout that will create an auto-fill grid with
configurable grid item sizes

CUSTOM PROPERTIES AND CONFIGURATION
--gutter (var(--space-s-m)): This defines the space
between each item.

--grid-min-item-size (14rem): How large each item should be
ideally, as a minimum.

--grid-placement (auto-fill): Set either auto-fit or auto-fill
to change how empty grid tracks are handled */

.grid {
  display: grid;
  grid-template-columns: repeat(
    var(--grid-placement, auto-fill),
    minmax(var(--grid-min-item-size, 16rem), 1fr)
  );
  gap: var(--gutter, var(--space-s-l));
}

/* A split 50/50 layout */
.grid[data-layout='halves'] {
  --grid-placement: auto-fit;
  --grid-min-item-size: clamp(16rem, 50vw, 33rem);
}

/* Three column grid layout */
.grid[data-layout='thirds'] {
  --grid-placement: auto-fit;
  --grid-min-item-size: clamp(16rem, 33%, 20rem);
}