Few styles fixes

Hi,

Thx for this theme, pretty nice!

I am note sure it is only on my end or not but I had to make small tweaks.

/* Media Uploader */
.attachments-browser .media-toolbar {
	background: unset;
}

textarea::placeholder, input::placeholder {
    color: lightgrey;
}

.media-menu-item {
	color: white;
}

button.media-menu-item:hover {
	color: white!important;
	text-decoration: underline;
}

/* Auto-complete */
ul.ui-autocomplete {
	background-color: #32373C;
}

There are probably more minor tweaks to do here and there, but most of the other I have done are plugin specific.

Cheers!