/* Tombol melayang: WhatsApp dan kembali ke atas. */
.fab{position:fixed;right:18px;bottom:18px;z-index:40;background:#1ea952;color:#fff;text-decoration:none;font-weight:600;padding:12px 18px 12px 14px;border-radius:999px;display:flex;gap:8px;align-items:center;animation:pulse 2.6s infinite}
.fab svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:2;stroke-linejoin:round}
@keyframes pulse{0%{box-shadow:0 8px 24px rgba(0,0,0,.28),0 0 0 0 rgba(30,169,82,.5)}70%{box-shadow:0 8px 24px rgba(0,0,0,.28),0 0 0 16px rgba(30,169,82,0)}100%{box-shadow:0 8px 24px rgba(0,0,0,.28),0 0 0 0 rgba(30,169,82,0)}}
.totop{position:fixed;right:18px;bottom:76px;z-index:40;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;font-size:1.1rem;opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .3s,transform .3s}
.totop.show{opacity:1;pointer-events:auto;transform:none}
@media (max-width:640px){.fab span{display:none}.fab{padding:13px}}