:root{--ink:#14140f;--ink-soft:#5d5c52;--line:#e2e0d6;--paper:#fbfaf5;--raise:#fff;--accent:#2f6f4f;--accent-ink:#fff;--warn:#8a4b2a;--radius:14px}*{box-sizing:border-box}html,body{background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font:16px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}#app{max-width:460px;padding:20px 16px calc(28px + env(safe-area-inset-bottom));margin:0 auto}header{padding:8px 2px 20px}h1{letter-spacing:-.02em;margin:0;font-size:30px;font-weight:600}h2{margin:0 0 4px;font-size:17px;font-weight:600}.sub{color:var(--ink-soft);margin:4px 0 0}.card{background:var(--raise);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;padding:16px}.row{justify-content:space-between;align-items:baseline;display:flex}.label{color:var(--ink-soft);margin-bottom:6px;font-size:13px;display:block}.amount{letter-spacing:-.02em;font-variant-numeric:tabular-nums;font-size:28px;font-weight:600}.hint{color:var(--ink-soft);margin:6px 0 0;font-size:13px}.choices{gap:8px;margin:12px 0;display:flex}.choice{font:inherit;font-variant-numeric:tabular-nums;background:var(--paper);color:var(--ink);border:1px solid var(--line);cursor:pointer;border-radius:10px;flex:1;padding:12px 8px}.choice.is-selected{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);font-weight:600}.primary{width:100%;min-height:48px;font:inherit;color:var(--accent-ink);background:var(--accent);cursor:pointer;border:0;border-radius:10px;padding:13px 16px;font-weight:600}.primary:disabled{opacity:.55;cursor:default}.ghost{width:100%;min-height:44px;font:inherit;color:var(--ink-soft);border:1px solid var(--line);cursor:pointer;background:0 0;border-radius:10px}textarea{width:100%;font:inherit;color:var(--ink);background:var(--paper);border:1px solid var(--line);resize:vertical;border-radius:10px;margin-bottom:10px;padding:12px}textarea:focus-visible,.primary:focus-visible,.choice:focus-visible,.ghost:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.status{min-height:1.5em;margin:10px 0 0;font-size:14px}.status.is-error{color:var(--warn)}.answer{border-top:1px solid var(--line);white-space:pre-wrap;margin-top:14px;padding-top:14px}footer{margin-top:20px}.receipts{color:var(--ink-soft);word-break:break-all;margin:12px 0 0;font-size:12px}.receipts a{color:var(--ink-soft)}@media (prefers-reduced-motion:no-preference){.answer{animation:.18s ease-out rise}@keyframes rise{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}}.examples{flex-wrap:wrap;gap:6px;margin:0 0 10px;display:flex}.example{min-height:44px;font:inherit;color:var(--ink-soft);background:var(--paper);border:1px solid var(--line);cursor:pointer;border-radius:999px;padding:7px 11px;font-size:13px}.example:hover{color:var(--ink);border-color:var(--ink-soft)}.example:focus-visible{outline:2px solid var(--accent);outline-offset:2px}