.nister-fab{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:10px;z-index:60}
.nister-fab button{border:0;border-radius:12px;padding:12px 14px;color:#fff;cursor:pointer;font-weight:700}
.nister-fab .fab-topup{background:linear-gradient(180deg,#6366f1,#4f46e5);box-shadow:0 10px 18px rgba(79,70,229,.35)}
.nister-fab .fab-wa{background:#25D366;box-shadow:0 10px 18px rgba(37,211,102,.35)}
.nister-backdrop{position:fixed;inset:0;background:rgba(2,6,23,.72);backdrop-filter:blur(2px);display:none;place-items:center;z-index:70}
.nister-modal{width:min(640px,92vw);background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.03));border:1px solid rgba(148,163,184,.25);border-radius:16px;padding:18px;color:#e5e7eb;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.nister-row{display:flex;gap:10px;align-items:center}.nister-row>*{flex:1}
.nister-input{width:100%;background:#081023;color:#e5e7eb;border:1px solid rgba(148,163,184,.25);border-radius:12px;padding:12px 14px;font-size:16px;outline:0}
.nister-input:focus{border-color:#6366f1;box-shadow:0 0 0 4px rgba(99,102,241,.35)}
.nister-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:14px}
.nister-btn{border:0;border-radius:12px;padding:12px 14px;color:#fff;font-weight:700;cursor:pointer}
.nister-ghost{background:transparent;color:#e5e7eb;border:1px solid rgba(148,163,184,.3)}
.nister-primary{background:linear-gradient(180deg,#6366f1,#4f46e5)}
.nister-alert{display:none;padding:10px;border-radius:10px;margin-bottom:10px}
.nister-ok{background:rgba(34,197,94,.15);border:1px solid rgba(34,197,94,.4);color:#bbf7d0}
.nister-err{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.4);color:#fecaca}