:root {
  --paper: #f4efe4;
  --ink: #141c18;
  --muted: #5c6b64;
  --line: #d7cfc0;
  --accent: #0e7a66;
  --kas: #1aa37f;
  --warn: #8a4b12;
  --bad: #9b1c1c;
  --ok: #0e7a66;
  --pad: 18px;
  --radius: 14px;
  --font: "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  --mono: "Cascadia Mono", "Consolas", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.45 var(--font); }
a { color: var(--accent); }
.home {
  display: inline-block;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 0.4rem 1rem;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 650;
}
.top {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
}
.brand { font-weight: 750; font-size: 22px; color: var(--ink); text-decoration: none; letter-spacing: -0.03em; }
.slogan { color: var(--muted); font-size: 13px; margin-right: auto; }
.top nav { display: flex; gap: 12px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a.on, .top nav a:hover { color: var(--ink); }
.wallet-slot { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.wallet-login { background: var(--ink); color: var(--paper); border-color: var(--ink); font-weight: 650; }
.wallet-out, .wallet-x { font: inherit; }
.wallet-go { background: var(--ink); color: var(--paper); border-color: var(--ink); font-weight: 650; }
.wmodal {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(20, 28, 24, 0.55);
  display: flex; align-items: center; justify-content: center;
  padding: 18px; cursor: pointer;
}
.wmodal[hidden] { display: none; }
.wmodal-card {
  background: var(--paper); color: var(--ink);
  width: min(28rem, 100%); padding: 18px 20px;
  border: 1px solid var(--line); border-radius: 14px; cursor: default;
}
.wmodal-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.wmodal-lead { color: var(--muted); font-size: 14px; }
.wmodal-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.wmodal-status { font-size: 14px; min-height: 1.2em; }
.wmodal-status.bad { color: var(--bad); font-weight: 600; }
main { padding: 22px; max-width: 920px; margin: 0 auto; }
footer { padding: 20px 22px; color: var(--muted); font-size: 13px; display: flex; justify-content: space-between; gap: 12px; }
h1 { font-size: 32px; letter-spacing: -0.04em; margin: 0 0 12px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
.lead { font-size: 18px; max-width: 62ch; }
.facts ul { padding-left: 18px; }
.facts li { margin: 6px 0; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.wide { font-size: 15px; }
.kicker { text-transform: uppercase; letter-spacing: 0.12em; font-size: 11px; color: var(--muted); }
.display { font-size: 56px; font-weight: 650; letter-spacing: -0.04em; line-height: 1; }
.display small { font-size: 22px; color: var(--muted); }
.err { background: #f8d7d4; color: var(--bad); padding: 10px 12px; border-radius: 8px; }
.warn { background: #f3e2c8; color: var(--warn); padding: 10px 12px; border-radius: 8px; }
.note { color: var(--muted); font-size: 14px; }
.mono, code, pre { font-family: var(--mono); }
pre { background: #ece6d8; padding: 14px; overflow: auto; border-radius: 8px; }
.go { display: flex; gap: 16px; align-items: center; margin-top: 28px; }
.big { display: inline-block; background: var(--ink); color: var(--paper); padding: 12px 18px; border-radius: 10px; text-decoration: none; font-weight: 650; }
.till { max-width: 480px; margin: 0 auto; }
.till-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; margin-bottom: 16px; }
.rate { color: var(--muted); font-size: 13px; text-align: right; }
.modes, .tips { display: flex; gap: 8px; margin: 12px 0; align-items: center; }
.modes button, .tips button, .item, .rail, .ghost, button {
  font: inherit; border: 1px solid var(--line); background: #fffdf8; border-radius: 10px; padding: 10px 14px; cursor: pointer;
}
.modes button.on, .tips button.on, .rail.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.pad button { font-size: 28px; font-weight: 650; min-height: 72px; }
.pad .mute { color: var(--muted); }
.cart { display: grid; gap: 8px; }
.item { display: flex; justify-content: space-between; min-height: 56px; align-items: center; }
#lines { list-style: none; padding: 0; }
#lines li { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px dashed var(--line); }
.charge {
  width: 100%; min-height: 64px; font-size: 20px; font-weight: 700;
  background: var(--accent); color: white; border: 0; border-radius: 12px; margin-top: 12px;
}
.charge:disabled { opacity: 0.4; }
.hide { display: none !important; }
.checkout { display: grid; gap: 16px; }
.bill { background: #fffdf8; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.layers { display: grid; grid-template-columns: 110px 1fr; gap: 6px 12px; margin: 16px 0 0; font-size: 14px; }
.layers dt { color: var(--muted); font-weight: 650; }
.layers dd { margin: 0; }
.rail.guest { border-style: dashed; }
.rails { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.rail { display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: inherit; min-height: 92px; }
.rail em { font-style: normal; font-size: 12px; color: var(--muted); }
.rail.on em { color: #cfe9e1; }
.paybox { background: #111a17; color: #e8f3ee; border-radius: 16px; padding: 20px; text-align: center; }
.paybox a { color: #9ee0c8; }
.qr { width: 220px; height: 220px; background: white; padding: 10px; border-radius: 8px; }
.uri { display: block; font-family: var(--mono); font-size: 12px; word-break: break-all; margin: 12px 0; }
.due { font-size: 28px; font-weight: 650; }
.actions { display: grid; gap: 8px; margin-top: 12px; }
.claim { display: flex; gap: 8px; }
.claim input { flex: 1; padding: 10px; border-radius: 8px; border: 1px solid #2a3c36; background: #0c1412; color: #e8f3ee; }
.ghost { background: transparent; color: #e8f3ee; border-color: #3d534b; }
.form label, .form fieldset { display: block; margin: 12px 0; }
.form input, .form select { width: 100%; padding: 10px; font: inherit; border: 1px solid var(--line); border-radius: 8px; }
.check { display: flex; gap: 8px; align-items: center; }
.receipt dl { display: grid; grid-template-columns: 140px 1fr; gap: 8px 12px; }
.st-New { color: var(--muted); }
.st-Processing { color: var(--warn); }
.st-Settled { color: var(--ok); font-weight: 700; }
.st-Expired, .st-Invalid { color: var(--bad); }
button, .item, .rail, .charge { touch-action: manipulation; }
@media (max-width: 700px) {
  html, body { overflow-x: hidden; }
  .top { padding: 10px 12px; gap: 8px; }
  .top nav { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  main { padding: 14px 12px 28px; }
  .till-head { flex-direction: column; align-items: flex-start; }
  .rate { text-align: left; }
  .display { font-size: 40px; }
  .slogan { display: none; }
  .pad { gap: 6px; }
  .pad button { min-height: 64px; font-size: 24px; }
  .charge { min-height: 56px; font-size: 18px; }
  .rails { grid-template-columns: 1fr; }
  .claim { flex-direction: column; }
  .qr { width: min(220px, 72vw); height: auto; aspect-ratio: 1; }
  footer { flex-direction: column; padding: 14px 12px 24px; }
}