<div class="gradient-card">
  <div class="card-content">
    <h2>Premium Access</h2>
    <p>Unlock exclusive features with our pro plan. Perfect for creators and teams.</p>
    <button>Upgrade Now</button>
  </div>
</div>

.gradient-card {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  position: relative;
  width: 300px;
  padding: 2px;
  border-radius: 16px;
  background: linear-gradient(135deg, #3b82f6, #ec4899);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
.card-content {
  background: #fff;
  padding: 30px;
  border-radius: 14px;
  text-align: center;
}
.gradient-card h2 {
  margin: 0 0 10px 0;
  color: #111827;
}
.gradient-card p {
  color: #6b7280;
  margin-bottom: 25px;
  line-height: 1.5;
}
.gradient-card button {
  background: #111827;
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: opacity 0.2s;
}
.gradient-card button:hover {
  opacity: 0.9;
}