<svg width="800" height="600">
  <defs>
    <linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="0%">
      <stop offset="0%" style="stop-color:rgb(168,85,247);stop-opacity:1" />
      <stop offset="100%" style="stop-color:rgb(192,132,252);stop-opacity:1" />
    </linearGradient>
  </defs>
  <rect x="50" y="50" rx="20" ry="20" width="150" height="150" style="fill:url(#grad1);stroke:black;stroke-width:5;opacity:0.5" />
  <circle cx="300" cy="125" r="70" fill="url(#grad1)" />
</svg>

.button {
  padding: 1rem 2rem;
  border-radius: 8px;
  background: linear-gradient(90deg, #a855f7, #c084fc);
  color: white;
  font-weight: 600;
  transition: transform 0.2s ease;
}
.button:hover { transform: scale(1.05); }