:root {
  background: #e3effb;
}

:target {
  background: #384047;
  color: white;
}

#col-c:target {
  background: #eff1f2;
  color:initial;
  box-shadow: 0 0 6px rgba(0,0,0, .2);
  
}

input:not([type="submit"]) {
  box-shadow: inset 0 2px 0 rgba(0, 0, 0, .15);
}

.col:not(:first-child),
nav a:not(:first-child) {
  margin-left: 15px;
}