Hairline outline

Hairline outline: a CSS button. Copy the rules, or the prompt that rebuilds it.

outline ghostrectanglethin-border

CSS

.btn-009 {
  font: 500 14px/1 system-ui,sans-serif;
  color: #111827;
  background: transparent;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  padding: 11px 20px;
  cursor: pointer;
  transition: border-color .15s,background .15s
}
.btn-009:hover {
  border-color: #111827;
  background: #f9fafb
}
.btn-009:focus-visible {
  outline: 2px solid #111827;
  outline-offset: 2px
}
.btn-009:active {
  background: #f3f4f6
}

HTML

<button class="btn-009">Learn more</button>

Prompt

A quiet outline button: transparent background, 1px #d1d5db border, near-black #111827 text at 14px medium, 6px radius, 11px by 20px padding. Hover darkens the border to #111827 and tints the background #f9fafb. Active #f3f4f6. Focus outline 2px near-black.

Hairline outline

Same shelf