Modern CSS Features

Style elements based on their container's size, not the viewport. Build truly reusable components that adapt to any context.

The :has() selector lets you style parents based on children. Native nesting means no more preprocessor for nested styles.

View Transitions create smooth page-to-page animations. Scroll-driven animations sync with scroll position without JavaScript.

Subgrid lets nested elements align to parent grid tracks. Anchor positioning places elements relative to other elements without JavaScript.

color-mix() creates dynamic color variations. Cascade layers give you explicit control over CSS specificity.

Quick Examples

.card-container {
  container-type: inline-size;
}

@container (min-width: 400px) {
  .card { flex-direction: row; }
}

/* Style parent based on child */
.card:has(img) {
  padding: 0;
}

.form:has(:invalid) {
  border-color: red;
}

.card {
  padding: 1rem;

  & h2 { font-size: 1.5rem; }
  &:hover { box-shadow: 0 4px 12px; }

  @media (width > 768px) {
    padding: 2rem;
  }
}

:root {
  --primary: #3b82f6;
  --primary-light: color-mix(
    in srgb, var(--primary), white 30%
  );
  --primary-dark: color-mix(
    in srgb, var(--primary), black 30%
  );
}