∞ forever components

CSS 3D & Perspective

Helical DNA Stair

26 CSS 3D rungs twist into a rotating DNA double-helix staircase with depth-faded opacity; pointer drag and click add momentum to the spin.

cssmedium complexitymoderate motionpointer

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When to use it

Science/biotech hero sections, ambient background loops, CSS 3D capability demos.

When not to

Layouts requiring text legibility over the animation; low-end mobile where 26 transformed divs plus rAF may cause jank.

Working with an AI agent

Every component ships agent-ready metadata. An example instruction for this one:

Change STEPS to 32, increase RADIUS to 90, and swap the bar gradient colors from cyan (#39c0ed) to a purple (#a855f7) to match a biotech brand palette. Theme: dark tokens live in :root, the light variant in :root[data-theme="light"]; ?theme=light or a {type:'forever:theme'} postMessage switches at runtime.

Safe to edit

  • rung count (STEPS=26)
  • twist rate (STEP_ANGLE=32 deg per step)
  • helix radius (RADIUS=72)
  • vertical rise per step (STEP_Y=15)
  • auto-spin speed (spin += 0.42)
  • node and bar colors (#39c0ed)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • prefers-reduced-motion guard (static fallback at spin=18)
  • visibilitychange pause/resume
  • depth-cue opacity formula (compositor-friendly, no filter)
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

  • All geometry is rebuilt on resize via innerHTML clear — brief flash on window resize
  • perspective hardcoded at 760px; very wide viewports may look flat

3dcss-3ddnahelixperspectiveloopdepth-cue

More CSS 3D & Perspective components

  • Rotating CubeGlowing sage-green wireframe cube slowly auto-rotates in CSS 3D with a subtle sine-wave tilt; pointer movement offsets the rotation to follow the cursor.
  • Card Deck FanSeven gold-and-mauve playing cards fan open and closed in a sine-wave 3D arc using CSS rotateZ and perspective transform.
  • Coverflow RingEight vivid gradient cards orbit in a 3D coverflow ring with CSS perspective and per-card reflections. Pointer X position steers rotation speed.
  • Folding Paper4-panel paper accordion folds and unfolds in a zig-zag CSS 3D motion, slowly rotating on a dark green background. Cream front and sage back faces alternate.
  • Isometric Blocks3x3 grid of soft lilac CSS 3D cubes bobs in a staggered sine wave on a dark lilac-tinted ground. Three shaded faces per cube simulate isometric lighting.
  • Parallax DepthA glowing sun with colored orbiting dots on layered CSS 3D planes that tilt and parallax toward the pointer; auto-orbits until interaction.