/* Transparent book-and-tree identity, shared by every workspace. */
.brand img{width:42px;height:42px;flex:none;object-fit:contain;filter:brightness(0) invert(1)}
.loading .brand-logo{width:96px;height:96px;object-fit:contain}
.portal-auth-mark img{width:104px;height:104px;object-fit:contain}
.auth-logo{display:block;width:72px;height:72px;margin:0 auto 12px;object-fit:contain}
.tutor-logo{width:42px;height:42px;object-fit:contain;flex:none}
.hint-card .hint-logo{width:38px;height:38px;object-fit:contain;flex:none}
.print-logo{width:32px;height:32px;vertical-align:middle;object-fit:contain}
@media(max-width:1190px){.brand img{width:36px;height:36px}}
@media(max-width:650px){.brand img{width:33px;height:33px}}
@media print{.brand img{filter:none}}