.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 6px 16px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    
    /*
    border-radius: 8px;
    */
    
    -webkit-transition-duration: 0.1s; /* Safari */
    transition-duration: 0.1s;
}


.button:hover {
	 opacity: 0.75;	
}


.bverde {background-color: #4CAF50;} 

.bblue {background-color: #008CBA;} 

.brosso {background-color: #f44336;} 

.bgrigio {background-color: #e7e7e7; color: black;} 

.bnero {background-color: #555555;} 


.bdisabled {
    opacity: 0.6;
    cursor: not-allowed;
}