body{font-family:system-ui,-apple-system,"PingFang SC",sans-serif;max-width:860px;margin:0 auto;padding:16px;color:#222}
h1{font-size:20px;cursor:pointer;user-select:none}
.rule{font-size:12px;color:#666}
nav button{margin:4px;padding:8px 14px}
nav button.active{background:#222;color:#fff}
input,select{margin:4px;padding:8px;display:block;width:100%;max-width:420px;box-sizing:border-box}
button{padding:8px 14px;margin:4px 4px 4px 0;cursor:pointer}
.card{border:1px solid #ddd;border-radius:8px;padding:12px;margin:10px 0}
.qr{width:200px;max-width:90%;cursor:pointer}
.payee{font-weight:bold}
#pinDialog{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;flex-direction:column;align-items:center;justify-content:center}
#pinDialog>*{background:#fff;padding:8px}