/* Persistent Back/Home navigation — v18.31 */
.persistent-nav-v18-31{position:fixed;left:18px;bottom:22px;z-index:2147483000;display:flex;gap:9px;padding:8px;border:1px solid rgba(255,130,55,.5);border-radius:16px;background:rgba(14,19,22,.94);box-shadow:0 10px 34px rgba(0,0,0,.42),0 0 18px rgba(255,112,37,.10);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.persistent-nav-v18-31 a,.persistent-nav-v18-31 button{appearance:none;-webkit-appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:42px;box-sizing:border-box;padding:9px 13px;border:1px solid #765033;border-radius:11px;background:linear-gradient(145deg,#292724,#1b2023);color:#f6e9dc;font:800 13px/1.15 system-ui,-apple-system,"Segoe UI",sans-serif;text-decoration:none;cursor:pointer;white-space:nowrap}
.persistent-nav-v18-31 a{border-color:#b96c38;color:#ffc28f}
.persistent-nav-v18-31 a:hover,.persistent-nav-v18-31 button:hover,.persistent-nav-v18-31 a:focus-visible,.persistent-nav-v18-31 button:focus-visible{border-color:#ff9858;box-shadow:0 0 15px rgba(255,126,52,.22);outline:2px solid rgba(255,152,88,.35);outline-offset:2px}
@media(max-width:720px){.persistent-nav-v18-31{left:10px;bottom:78px;padding:6px;gap:6px;border-radius:14px}.persistent-nav-v18-31 a,.persistent-nav-v18-31 button{min-height:40px;padding:8px 10px;font-size:12px}}
@media(max-width:390px){.persistent-nav-v18-31{right:10px;left:10px;justify-content:center}.persistent-nav-v18-31 a,.persistent-nav-v18-31 button{flex:1}}