.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;flex:none;
  border:1px solid rgba(128,128,128,.28);
  background:rgba(128,128,128,.1);
  color:inherit;cursor:pointer;font-size:15px;
  transition:transform .2s ease,background .2s ease,border-color .2s ease;
}
.theme-toggle:hover{transform:translateY(-1px);background:rgba(128,128,128,.18)}
.theme-toggle:active{transform:translateY(0)}