:root{--bg:#eef0f4;--card:#fff;--ink:#14161a;--muted:#6b7280;--line:#e3e6ec;--accent:#4f46e5;--accent-ink:#fff;--bad:#b42318;--ok:#067647}
@media (prefers-color-scheme:dark){:root{--bg:#0f1115;--card:#171a21;--ink:#eceef3;--muted:#98a0ae;--line:#272b35;--accent:#7c78f0;--accent-ink:#0f1115;--bad:#f97066;--ok:#47cd89}}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:grid;place-items:start center;padding:24px 16px;background:var(--bg);color:var(--ink);font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
.card{width:100%;max-width:440px;background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}
.head h1{margin:0;font-size:17px}
.bal{font-size:14px;color:var(--muted)}
.bal b{color:var(--ink)}
.body{padding:16px;display:grid;gap:16px}
label.sec{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.amount{display:flex;align-items:baseline;gap:8px;border-bottom:2px solid var(--line);padding-bottom:6px}
.amount input{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font-weight:600;font-size:34px;line-height:1.1;font-family:inherit;outline:0}
.amount:focus-within{border-color:var(--accent)}
.amount span{color:var(--muted);font-weight:600}
.range{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-top:6px}
.chips{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.chip{padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--ink);font-weight:600;font-size:14px;font-family:inherit;cursor:pointer}
.chip[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.chip:disabled{opacity:.4;cursor:not-allowed}
.methods{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px}
.method{padding:12px;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--ink);text-align:left;font-weight:600;font-size:14px;font-family:inherit;cursor:pointer}
.method small{display:block;color:var(--muted);font-weight:400;margin-top:2px}
.method[aria-pressed=true]{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent) inset}
.bonus{display:flex;align-items:center;justify-content:space-between;padding:12px;border:1px dashed var(--line);border-radius:12px;color:var(--muted);font-size:14px}
.foot{padding:16px;border-top:1px solid var(--line)}
.cta{width:100%;padding:14px;border:0;border-radius:12px;background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:16px;font-family:inherit;cursor:pointer}
.cta:disabled{opacity:.45;cursor:not-allowed}
.err{color:var(--bad);font-size:14px;min-height:20px}
.note{font-size:12px;color:var(--muted);text-align:center;margin-top:10px}
.loading,.fatal{padding:40px 16px;text-align:center;color:var(--muted)}
.fatal{color:var(--bad)}
.cardform{display:grid;gap:10px}
.brandrow{display:flex;justify-content:space-between;align-items:center}
.brand{font-size:13px;font-weight:700;color:var(--accent);min-height:1em}
.fld label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.fld input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--ink);font-size:16px;font-family:inherit;outline:0}
.fld input:focus{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 25%,transparent)}
.ferr{min-height:16px;font-size:12px;color:var(--bad);margin-top:3px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}