.tab-btn{padding:14px 0;border-bottom:1px solid transparent;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);transition:color .2s, border-color .2s;cursor:pointer;background:none;}
  .tab-btn.active{color:var(--ink);border-bottom-color:var(--ink);}
  .tab-panel{display:none;}
  .tab-panel.active{display:block;}