.logo {
    height: 8em;
    padding: 1.5em;
    will-change: filter;
    transition: filter 300ms;
}
.logo:hover {
    filter: drop-shadow(0 0 2em #646cffaa);
}
.logo.react:hover {
    filter: drop-shadow(0 0 2em #61dafbaa);
}