.hero h1 {
  font-weight:bolder;
}

.gallery {
  display: flex;
  flex-wrap: wrap;
  padding: 10px 20px;
}

.columna {
  flex: 25%;
  max-width: 25%;
  padding: 0 4px;
}

.columna img {
  margin-top: 8px;
  vertical-align: middle;
  width: 100%;
  transition: all .3s ease;
}

.columna img:hover {
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 0, 0, .5);
  transform: scale(1.1);
}

.overlay {
    position: fixed;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, .5);
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all .7s ease;
    visibility: hidden;
    opacity: 0;
}

.overlay .slideshow {
    width: 90%;
    height: 90%;
    background-color: rgb(220, 230, 199, 0.9);
    color: #000;
    position: relative;
    display: flex;
    justify-content: center;
}

.slideshow img {
    height: 100%;
    width: 100%;
    object-fit: contain;
}

.btn_close {
    position: absolute;
    top: -15px;
    right: -15px;
    font-size: 35px;
    background-color: rgba(0, 0, 0, .7);
    color: #FFFFFF;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
    transition: all .2s ease;
}

.btn_close:hover {
    transform: scale(1.2);
    cursor: pointer;
}

.btn_action {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 70px;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #FFFFFF;
}

.btn_action:hover > i {
    transform: scale(1.1);
    transition: all .2s ease;
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

.bi {
  pointer-events: none;
}

@media screen and (max-width: 800px) {
    .hero {
        max-width: 90%;
    }
    .hero h1{
        font-size: 2rem;
    }
    .columna {
        flex: 50%;
        max-width: 50%;
    }
    .btn_action {
        font-size: 55px;
    }
    .prev {
        left: 5px;
    }
    .next {
        right: 5px;
    }
    .slideshow img {
        width: 98%;
    }
}