Gwecode.
Buttons

Gradient Border Button

A button that appears to have a gradient border by nesting a white inner label inside a gradient-filled wrapper.

live preview 
<button class="btngrad-wrap">
  <span class="btngrad-inner">Explore</span>
</button>
.btngrad-wrap {
  border: none;
  padding: 2px;
  border-radius: 10px;
  background: linear-gradient(135deg, #3b82f6, #93c5fd);
  cursor: pointer;
}
.btngrad-inner {
  display: block;
  background-color: #ffffff;
  color: #3b82f6;
  font-family: system-ui, -apple-system, sans-serif;
  font-weight: 600;
  font-size: 15px;
  padding: 10px 24px;
  border-radius: 8px;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.btngrad-wrap:hover .btngrad-inner {
  background-color: transparent;
  color: #ffffff;
}