body {font-family: Arial, Verdana, sans-serif;}

h3 {color: olivedrab;}

body { background-color: rgba(240, 250, 240,0.8); }

#Livello1 {background-color: rgb(255,255,0);}
#Livello2 {background-color: rgb(135,206,250);}
#Livello3 {background-color: rgb(205,92,92);}