/* fade-in ảnh */
.vs-fade-img { opacity: 0; transform: scale(1.02); transition: opacity .5s ease, transform .6s ease; }
.vs-fade-img.loaded { opacity: 1; transform: scale(1); }

/* grain overlay */
.vs-grain { position: relative; }
.vs-grain::before{
  content:"";
  position:absolute; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.08'/%3E%3C/svg%3E");
  pointer-events:none;
  mix-blend-mode:overlay;
}