body{
    background-color: black;
}

.gallery-container{
display: flex;
flex-wrap: wrap;
width: 94%;
padding: 10px;
box-shadow: 0 0 3px 0 rgba(0, 0, 0, 0.3);
margin: 90px auto;

}

.gallery-item{
    flex-basis: 32.7%;
    margin-bottom: 6px;
    opacity: 0.86;
    margin-bottom: 5px;
    margin-left: 2px;
}

.gallery-item:hover{
    opacity: 1;
}

.gallery-item img{
    width: 25em;
    margin: 1em;
    border-radius: 0.2em;
    transition: 0.6s;

}

/*  lightbox */

.lightbox{
    position: fixed;
    display: none;
    background-color: rgba(0, 0, 0, 0.6);
    width: 100%;
    height: 100%;
    overflow: auto;
    top: 0;
    left: 0;
}

.lightbox-content{
    position: relative;
    width: 65%;
    height: 58%;
    margin: 5% auto;
}

.lightbox-content img{
    position: relative;
    width: 100%;
    height: 100%;
    border: 2px solid #fff;
    object-fit: cover;
}

.lightbox-prev, .lightbox-next{
position: absolute;
background-color: rgba(0, 0, 0, 0.8);
color: #fff;
padding: 9px;
top: 45%;
cursor: pointer;
}
.lightbox-prev{
    left: 0;
}
.lightbox-next{
    right: 0;
}

/* responsive  */
@media(max-width: 767px){
    .gallery-container{
        width: 100%;
    }
    .gallery-item{
        flex-basis: 49.80%;
        margin-bottom: 4px; 
    }
    .lightbox-content{
        width: 80%;
        height: 60%;
        margin: 15% auto;
    
    }
}

@media (max-width: 480px){
    .gallery-item{
        flex-basis: 100%;
        margin-bottom: 4px;
    }
    .lightbox-content{
        width: 90%;
        margin: 20px auto;
    }
}

h2{
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    font-size: 30pt;
    font-weight:200;
    margin-top: 100px;
}

hr{
    color: #fff;
}

.buttons {
padding: 2em 0 6em 0;
display: flex;
justify-content: center;
align-items: center;
flex-wrap: wrap;
}

.buttons button {
margin: 1em;
padding: 0.7em 1.5em;
font-size: 1.1em;
border: none;
background: #111;
color: #fff;
border: 2px solid #111;
border-radius: 0.2em;
cursor: pointer;
transition: 0.3s;
}

.buttons button:hover,
.buttons .btn-clicked {
   background: #fff;
   color: #111; 
}

.gallery-item .img-expand {
    width: 25em;
    margin: 1em;
  }
  
  .gallery-item .img-shrink{
      width: 0em;
      margin: -1em;
  }

@media screen and (max-width: 600px){
    .buttons button {
        width: 100%;
        display: block;
    }
    .gallery-item .img-expand,
    .gallery-item img{
        width: 100%;
    }

}