.header-buttons {
    display: flex;  
    max-width: 18em; 
    justify-content: flex-end;
    background-color: rgb(25 27 30); 
    border-radius: 1em 0 0 1em;
    box-shadow: -10px -6px 17px 1px #2f3234;
    z-index: 2;
}

.header-button {
    padding-top: 0.3em;
    padding-bottom: 0.1em;
    margin-left: 0.2em;
    width: 2.7em;
    background-repeat: no-repeat;
	background-position: center;
    background-size: cover;
    background-color: transparent;
    border: none;
}

.header-button:focus {
    outline: none;
}