Cobalt block

Cobalt block: a CSS button. Copy the rules, or the prompt that rebuilds it.

solid flatrectanglebrand-blue

CSS

.btn-002 {
  font: 600 15px/1 system-ui,sans-serif;
  color: #fff;
  background: #2563eb;
  border: 0;
  border-radius: 8px;
  padding: 13px 24px;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(37,99,235,.35);
  transition: background .15s,box-shadow .15s
}
.btn-002:hover {
  background: #1d4ed8;
  box-shadow: 0 4px 12px rgba(37,99,235,.35)
}
.btn-002:focus-visible {
  outline: 3px solid rgba(37,99,235,.4);
  outline-offset: 2px
}
.btn-002:active {
  background: #1e40af;
  box-shadow: none
}

HTML

<button class="btn-002">Continue</button>

Prompt

A solid blue button #2563eb with white 15px semibold text, 8px radius and 13px by 24px padding. It has a faint 1px blue shadow; on hover it darkens to #1d4ed8 and the shadow grows to 0 4px 12px at 35% blue. Active goes to #1e40af with no shadow. Focus shows a 3px translucent blue outline.

Cobalt block

Same shelf