style.css

body{
width:1000px;
margin:auto;
}  
h1{
font-family: 'BellotaRegular';
font-size: 36px;
text-align: center;
}

h2{
font-family: 'BabelStoneModernRegular';
font-weight: normal;
font-style: normal; 
font-size : 20px;
text-align: center;
}

p.citation{
font-family: 'UglyTypistRegular';
font-size: 20px;
text-align: center;
}

container{
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 30px;
}

.card{
width: 300px;
height:225px;
}

.card:hover .overlay {
  opacity: 1;
}

.cardimage {
  display: block;
  width: 100%;
  height: auto;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
}

.cardtext {
  color: black;
  font-size: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}