.kk-doc-layout{ display:grid; grid-template-columns:200px 1fr; gap:var(--sp-4); align-items:start; }
  .kk-doc-rail{ display:flex; flex-direction:column; gap:2px; background:var(--c-surface); border:1px solid var(--c-border); border-radius:var(--r-lg); padding:var(--sp-2); position:sticky; top:12px; }
  .kk-doc-rail-item{ display:flex; align-items:center; justify-content:space-between; gap:8px; padding:8px 10px; border-radius:var(--r-sm); font-size:var(--fs-sm); font-weight:600; color:var(--c-text-2); background:none; border:none; text-align:left; cursor:pointer; width:100%; }
  .kk-doc-rail-item:hover{ background:var(--c-bg); color:var(--c-text); }
  .kk-doc-rail-item.active{ background:var(--c-primary-bg); color:var(--c-primary); }
  .kk-doc-rail-item .cnt{ font-size:var(--fs-xs); font-weight:700; color:var(--c-text-3); }
  .kk-doc-rail-item.active .cnt{ color:var(--c-primary); }
  body.theme-dark .kk-doc-rail-item.active{ background:rgba(37,99,235,.18); }
   
  body.theme-dark .kk-doc-rail{ background:#172235; border-color:#334155; }
  body.theme-dark .kk-doc-rail-item{ color:#cbd5e1; }
  body.theme-dark .kk-doc-rail-item:hover{ background:#26364d; color:#f1f5f9; }
  body.theme-dark .kk-doc-rail-item .cnt{ color:#94a3b8; }