body {
  background-color: white;
  margin: 0;
  font-family: "Poppins", sans-serif;
  color: #212529;
  font-weight: bold;
  font-style: normal;
}

.header {
  text-align: left;
  padding-top: 25px;
  margin:20px;
}

.gallery-row {
  display: -ms-flexbox; 
  display: flex;
  -ms-flex-wrap: wrap; 
  flex-wrap: wrap;
  padding: 0px 8px;

}

.gallery-column {
  -ms-flex: 25%; 
  flex: 25%;
  max-width: 25%;
  padding: 0px 8px;
}

.gallery-column img {
  margin-top: 8px;
  vertical-align: middle;
  width: 100%;
  border-radius: 12px;
}

@media screen and (max-width: 800px) {
  .gallery-column {
  -ms-flex: 50%;
  flex: 50%;
  max-width: 50%;
  }
}

@media screen and (max-width: 600px) {
  .gallery-column {
  -ms-flex: 100%;
  flex: 100%;
  max-width: 100%;
  }
}

img.hover-shadow {
  transition: 0.3s;
}
.hover-shadow:hover {
  box-shadow: 0 15px 30px 0 rgba(0, 0, 0, 0.733), 0 6px 20px 0 rgba(0, 0, 0, 0.418);
}
/* The Modal (background) */
.modal {
display: none; 
position: fixed; 
z-index: 1; 
padding-top: 100px; 
left: 0;
top: 0;
width: 100%; 
height: 100%; 
overflow: auto; 
background-color: rgba(0,0,0,0.9); 
}
/* Modal Content (image) */
.modal-content {
margin: auto;
display: block;
width: 80%;
max-width: 700px;
}
/* The Close Button */
.close {
color: rgb(255, 255, 255);
position: absolute;
top: 10px;
right: 25px;
font-size: 35px;
font-weight: bold;
}

.close:hover,
.close:focus {
cursor: pointer;
}

.mySlides {
display: none;
}

/* Next & previous buttons */
.prev,
.next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -50px;
color: rgb(255, 255, 255);
font-weight: bold;
font-size: 20px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
-webkit-user-select: none;
}

/* Position the "next button" to the right */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
border-radius: 12px;
background-color: rgba(0, 44, 138, 0.726);
}