body {
    background: #4f0869;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    flex-direction: column;
}
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(0,0,0,0.2), rgba(0,0,0,0));
    pointer-events: none;
}
#atras {
    position: fixed;
    bottom: 20px;
    right: 52%;
}
#slide {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
}
#adelante {
    position: fixed;
    bottom: 20px;
    left: 52%;
}
.trelewciudad1 {
    font-size: 7.5vw;
    white-space: nowrap;
    letter-spacing: 0;
    line-height: 1;
    
}
.btn-menu {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #1a1a1a;
  color: #e0e0e0;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.85rem;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  z-index: 999;
}

.btn-menu:hover {
  background: #242424;
  border-color: #444;
  color: #ffffff;
}

.btn-menu:active {
  transform: scale(0.98);
}