/* Thai Language Studio — shared nav + language-switcher styles
   for pages with TWO languages (中文 / EN).
   Used by every such page via <link rel="stylesheet" href="assets/nav-lang-2.css">. */
nav{position:sticky;top:0;z-index:50;background:var(--bg);padding:16px 0}
.lang-switch{display:flex;align-items:center;gap:4px;background:rgba(61,140,143,.06);border:1px solid var(--gold-line);border-radius:100px;padding:4px}
.lang-btn{padding:6px 14px;border-radius:100px;border:none;background:none;cursor:pointer;font-family:var(--font-en);font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--ivory-dim);transition:all .2s}
.lang-btn.active{background:var(--gold);color:#fff}