@import url("https://fonts.googleapis.com/css2?family=Quintessential&family=Stack+Sans+Notch:wght@200..700&display=swap");

*, *:before, *:after{
    box-sizing: border-box;
}
section{
   display: flex;
   flex-wrap: wrap;
   justify-content: center;
   align-items: center;
   
}
body,section{
background: #e5b8ff;
}
img{
display: block;
margin: 8px;
border: 2px solid black;
box-shadow: 0px 0px 10px black;
max-width: 30%;
height: auto;
filter: grayscale(1);
opacity: 50%;
}

img:hover{
    filter: grayscale(0);
    opacity: 100%;
    z-index: 10;
    transition: 1s opacity ease-in-out, 1s transform ease-in-out;
}

h1 {
  font-size: 4rem;
  display: flex;
  justify-content: center;
  flex-wrap: nowrap;
  font-family: "Quintessential", sans-serif;
  font-weight: 700;
  font-style: normal;
  background: #ffa6fb;
  padding: 20px;
  border: solid 10px black;
}
a {
  text-decoration: none;
  color: black;
  background: #76438f;
  padding: 10px;
  border: 2px solid black;
  font-family: "Stack Sans Notch", sans-serif;
  
  display: flex;
  flex-wrap: nowrap;
}
a:hover {
  background: #dd94ff;
}
h3{
    flex-wrap: nowrap;
    display: flex;
    justify-content: center;
}
h3, a, h1{
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
}
header{
  display: flex;
  flex-direction: column  ;
  text-align: center;
  margin-bottom: 50px;
}
#references{
  display: flex;
  justify-content: space-evenly;
  margin-bottom: 20px;
}
#references h1{
  border: 2px solid black;
  font-size: 3rem;
    font-family: "Stack Sans Notch", sans-serif;
}
#references img{
  width:347px;
  height: 346px;
  opacity: 100%;
  filter: grayscale(0);
  justify-content: space-between;
}
#references img:hover{
  opacity: 100%;
}