.nav-theme {
  position: relative;
  width: 60px; height: 28px;
  border-radius: 14px;
  background: rgba(26,18,8,0.6);
  border: 0.5px solid rgba(200,134,10,0.4);
  cursor: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  transition: background .25s, border-color .25s;
}
.nav-theme:hover { border-color: var(--gold-bright); background: rgba(42,30,10,0.8); }
.nav-theme svg {
  width: 12px; height: 12px;
  color: var(--gold-pale);
  z-index: 2;
  transition: color .25s, opacity .25s;
}
.nav-theme .nt-thumb {
  position: absolute;
  top: 2px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-bright), var(--gold));
  box-shadow: 0 2px 8px rgba(239,159,39,0.4);
  transition: left .3s cubic-bezier(.4,0,.2,1), background .3s;
  z-index: 1;
  left: 2px;
}
body.light-theme .nav-theme .nt-thumb { left: 34px; }
.nav-theme .nt-moon { opacity: 1; }
.nav-theme .nt-sun  { opacity: 0.45; }
body.light-theme .nav-theme .nt-moon { opacity: 0.45; }
body.light-theme .nav-theme .nt-sun  { opacity: 1; }
body.light-theme .nav-theme { background: rgba(241,235,219,0.7); border-color: rgba(176,116,8,0.45); }
body.light-theme .nav-theme svg { color: var(--gold-dark); }
body.light-theme .nav-theme {
  background: #FFFFFF;
  border-color: rgba(140,89,8,0.45);
}
body.light-theme .nav-theme svg { color: #B85C00; }
body.light-theme .nav-theme .nt-thumb {
  background: linear-gradient(135deg, #B85C00, #6B2D0A);
  box-shadow: 0 2px 8px rgba(184,92,0,0.4);
}