*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  background:var(--bg-main);
  color:var(--text-main);
  font-family:var(--font-sans);
}

/* Accessibility helper */
.sr-only{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}