#selector-tema{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.65);color:#fff;padding:10px 14px;cursor:pointer;font-size:.9rem;font-weight:900;border-radius:999px;transition:all .25s ease;flex:0 0 auto;white-space:nowrap}#selector-tema:hover{background:#fff;color:var(--brand-ink)}.scroll-to-top{position:fixed;bottom:22px;left:22px;width:56px;height:56px;background:linear-gradient(135deg,var(--color-principal),var(--color-acento));color:#fff;display:grid;place-items:center;border-radius:50%;cursor:pointer;box-shadow:0 14px 34px rgba(15,23,42,.20);font-size:1.8rem;text-decoration:none;line-height:1;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease,transform .3s ease;z-index:999}.scroll-to-top.visible{opacity:1;visibility:visible}.scroll-to-top:hover{transform:translateY(-4px)}