.container{max-width:1900px;margin:0 auto;padding:20px;}
h1{text-align:center;font-size:2.5rem;margin-bottom:0.3em;}
.subtitle{text-align:center;color:#666;margin-bottom:2rem;}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform 0.3s ease;}
@media(max-width:900px){.gallery{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.gallery{grid-template-columns:1fr;}}
.contactus{text-align:center;margin-top:2.5rem;margin-bottom:2.5rem;}
.contactus a{display:inline-block;margin:6px;padding:10px 20px;background:#333;color:#fff;text-decoration:none;border-radius:8px;transition:background 0.2s;}
.contact a:hover{background:#555;}

#backToTop {
  position: fixed;
  bottom: 40px;
  right: 40px;
  display: none;
  background: #3f3f3f;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  transition: background 0.3s;
  z-index: 999;
}
#backToTop:hover {
  background: #555;
}