ボタン
CSS

Shimmer Button

光の反射が流れるシマーエフェクト。プレミアム感を演出。

HTML
<button class="shimmer-btn">Subscribe</button>
CSS
.shimmer-btn {
  position: relative;
  padding: 14px 36px;
  background: #1a1a1a;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  overflow: hidden;
}
.shimmer-btn::after {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: linear-gradient(
    115deg,
    transparent 40%,
    rgba(255,255,255,.12) 45%,
    rgba(255,255,255,.2) 50%,
    rgba(255,255,255,.12) 55%,
    transparent 60%
  );
  animation: shimmer 3s infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%) rotate(15deg); }
  100% { transform: translateX(100%) rotate(15deg); }
}