Soft circle icon

Soft circle icon: a CSS button. Copy the rules, or the prompt that rebuilds it.

neumorphicsoft-uicircleicon

CSS
.btn-040 {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  color: #4f46e5;
  background: #e0e5ec;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 5px 5px 10px #b8bec7,-5px -5px 10px #fff;
  transition: box-shadow .15s,color .15s
}
.btn-040:hover {
  color: #3730a3
}
.btn-040:focus-visible {
  outline: 2px solid #4f46e5;
  outline-offset: 3px
}
.btn-040:active {
  box-shadow: inset 3px 3px 6px #b8bec7,inset -3px -3px 6px #fff
}
HTML
<div style="background:#e0e5ec;padding:28px"><button class="btn-040" aria-label="Add"><svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round"><path d="M12 5v14M5 12h14"/></svg></button></div>
Prompt

A round 52px neumorphic icon button on #e0e5ec: same background, a 20px indigo #4f46e5 plus icon (inline SVG, 2.5 stroke), raised with 5px 5px 10px #b8bec7 and -5px -5px 10px white shadows. Hover darkens the icon to #3730a3; active switches to inset 3px shadows. Focus outline 2px indigo.