.buttons-wrapper {
    position: fixed;
    bottom: 0;
    right: 0;
    opacity: .15;
    transition: opacity 200ms ease-in-out;
    padding: 1rem;
}  

.buttons-wrapper:hover {
    opacity: 1;
}

.buttons {
    display: flex;
    margin-top: .5rem;
    justify-content: center;
}        
.buttons > * + * {
    margin-left: .25rem;
}        
.btn {
    cursor: pointer;
    background: none;
    color: white;
    border-radius: .25rem;
    border: 1px solid white;
    padding: .25rem .5rem;
    transition: background-color 200ms ease-in-out;
    display: inline-block;
    text-decoration: none;
    margin: 5px;
} 

.btn:hover {
    background-color: #3e4bda;
} 

.logo {
    font-size: 1rem;
    text-align: center;
    text-decoration: none;
    color: white;
    width: 100%;
    display: inline-block;
}
  
.logo:hover {
    text-decoration: underline;
}