:root{
  --cassiopeia-color-primary:#000000;/* COLORE PRIMARIO*/
  --cassiopeia-color-hover:#ffffff;/* COLORE HOVER*/
  .navbar-brand {
  text-align: center;
  width: 100%;}
 }
.centro { 
  display: flex;
  align-items: center
}
 .tastoblu {
background-image: url(https://sabrinafalzone.info/images/cerchi/cerchio-blu1.png);
background-repeat: no-repeat;
background-position: center;
color: white;
float: left;
display: block;
width: 150px;
height: 150px;
text-align: center;
vspace:5px;
font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}
 .tastogiallo {
background-image: url(https://sabrinafalzone.info/images/cerchi/cerchio-giallo1.png);
background-repeat: no-repeat;
background-position: center;
color: white;
float: left;
border: white;
display: block;
width: 150px;
height: 150px;
text-align: center;
font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";  
}
 .tastorosso {
background-image: url(https://sabrinafalzone.info/images/cerchi/cerchio-rosso1.png);
background-repeat: no-repeat;
background-position: center;
color: white;
float: left;
border: white;
display: block;
width: 150px;
height: 150px;
text-align: center;
font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}
 .tastonero {
background-image: url(https://sabrinafalzone.info/images/cerchi/cerchio-nero1.png);
background-repeat: no-repeat;
background-position: center;
text-color: white;
float: left;
border: white;
display: block;
width: 150px;
height: 150px;
text-align: center;
font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, "sans-serif";
}
a.bianco{
  color:#ffffff;
}
a.nero{
  color:black;
}