.menu {
    
}

button + .menu:active,
button:focus + .menu {
    display: block;
    
}

.menu {
  
    background: #E3E2E2;
    border-radius: 4px;
    border: 1px solid #dedede;
    display: none;
    position: absolute;
    padding: 10px;
    
}

.menu a {
    text-decoration:none;
color: #303030;
font-size: 14px;
}