:root {
    --bg: #f1f1f1;
    --card: #fafafa;
    --ink: #2b2b2b;
    --dim: #6b6b6b;
    --line: #dcdcdc;
    --brand: #008cd4;
    --ok: #1f8a4c;
    --bad: #c4372a;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
    background: var(--bg);
    color: var(--ink);
    font: 16px/1.5 "Inter Tight", system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); }

.testbar {
    background: #ffe9a8; color: #5a4300; text-align: center;
    font-size: 13px; font-weight: 500; padding: 6px 16px;
}
.wrap { max-width: 520px; margin: 0 auto; padding: 40px 16px 56px; }
.logo { display: inline-block; margin-bottom: 28px; }
.logo img { display: block; height: 32px; width: auto; }

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 32px 28px;
}
h1 { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; margin: 0 0 8px; line-height: 1.2; }
.lead { color: var(--dim); margin: 0 0 24px; }

form { display: grid; gap: 16px; }
label { display: grid; gap: 6px; font-size: 14px; font-weight: 500; }
.opt { color: var(--dim); font-weight: 400; }
input, select {
    font: inherit; color: var(--ink);
    width: 100%; min-height: 48px; padding: 10px 14px;
    background: #fff; border: 1px solid var(--line); border-radius: 10px;
}
input:focus, select:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: transparent; }
.amount-row { display: grid; grid-template-columns: 110px 1fr; gap: 12px; }
.amt input { font-size: 20px; font-weight: 600; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 52px; padding: 0 24px; margin-top: 4px;
    background: var(--ink); color: #fff; border: 0; border-radius: 999px;
    font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { background: #000; }
.btn:disabled { opacity: .6; cursor: wait; }

.error { margin: 0; padding: 10px 14px; border-radius: 10px; background: #fbe7e5; color: var(--bad); font-size: 14px; }
.small { font-size: 13px; color: var(--dim); }
.secure { margin: 20px 0 0; }
.foot { text-align: center; margin-top: 24px; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; word-break: break-all; }

.result { text-align: center; }
.badge {
    width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 16px;
    display: grid; place-items: center; color: #fff; font-size: 26px; font-weight: 600;
}
.badge.ok { background: var(--ok); }
.badge.bad { background: var(--bad); }
.summary {
    display: grid; grid-template-columns: auto 1fr; gap: 10px 16px;
    text-align: left; margin: 8px 0 16px; padding: 16px;
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
}
.summary dt { color: var(--dim); font-size: 14px; }
.summary dd { margin: 0; font-weight: 500; text-align: right; }

@media (max-width: 480px) {
    .wrap { padding-top: 24px; }
    .card { padding: 24px 18px; }
    h1 { font-size: 24px; }
}