/* TokenQR — the tool is the hero; the printable "ticket" is the one bold object.
   Ledger palette: cool sage paper, deep green ink, amber for network warnings. */
:root {
  --paper: #eef2ef;
  --card: #ffffff;
  --ink: #13241d;
  --muted: #56675f;
  --line: #d3dcd7;
  --green: #0e6b50;
  --green-ink: #ffffff;
  --green-soft: #dcebe4;
  --amber: #f2b31b;
  --amber-ink: #2a1e00;
  --amber-soft: #fff3d1;
  --bad: #b3361f;
  --bad-soft: #fbe4df;
  --focus: #1b5fd1;
  /* The ticket is paper in both themes: QR codes scan best dark-on-light */
  --ticket-bg: #ffffff;
  --ticket-ink: #13241d;
  --ticket-muted: #5b6b63;
  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-body: "Atkinson Hyperlegible Next", "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --font-addr: "Atkinson Hyperlegible Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --r-s: 8px;
  --r-m: 14px;
  --r-l: 22px;
  --max: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0c1512; --card: #14201b; --ink: #e6efea; --muted: #9aaba3; --line: #27362f;
    --green: #3fbf8f; --green-ink: #06130e; --green-soft: #173126;
    --amber: #f2b31b; --amber-ink: #1f1600; --amber-soft: #392d0c;
    --bad: #ff8a73; --bad-soft: #3a1a14; --focus: #8ab4ff;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0c1512; --card: #14201b; --ink: #e6efea; --muted: #9aaba3; --line: #27362f;
  --green: #3fbf8f; --green-ink: #06130e; --green-soft: #173126;
  --amber: #f2b31b; --amber-ink: #1f1600; --amber-soft: #392d0c;
  --bad: #ff8a73; --bad-soft: #3a1a14; --focus: #8ab4ff;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--font-body);
}
img, svg { max-width: 100%; }
a { color: var(--green); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2rem, 1.3rem + 3vw, 3.2rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--card); padding: 8px 12px; z-index: 20; }
.skip:focus { left: 8px; }

/* Header */
.site-head { padding-block: 18px; }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 800 1.25rem/1 var(--font-display); letter-spacing: -0.01em; }
.brand svg { width: 34px; height: 34px; flex: none; }
.nav { display: flex; gap: 4px 18px; flex-wrap: wrap; font-size: 0.95rem; }
.nav a { color: var(--ink); text-decoration: none; padding: 6px 2px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--green); text-decoration: underline; }

/* Hero + tool */
.hero { padding-block: 18px 8px; }
.hero h1 { max-width: 18ch; }
.hero .lede { margin-top: 12px; max-width: 58ch; color: var(--muted); font-size: 1.08rem; }
.trust { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 14px; padding: 0; list-style: none; font-size: 0.92rem; color: var(--muted); }
.trust li { display: inline-flex; align-items: center; gap: 6px; }
.trust svg { width: 16px; height: 16px; color: var(--green); flex: none; }

.tool { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 400px); gap: 28px; align-items: start; padding-block: 24px 40px; }
.steps { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-l); padding: 8px 24px; }
.step { border: 0; margin: 0; padding: 20px 0; min-width: 0; }
.step + .step { border-top: 1px solid var(--line); }
.step legend { float: left; width: 100%; }
.step legend + * { clear: both; }
.step legend, .step > .step-label { display: flex; align-items: center; gap: 10px; padding: 0; font: 700 1.1rem/1.2 var(--font-display); margin-bottom: 12px; }
.n { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--ink); color: var(--paper); font: 700 0.95rem/1 var(--font-body); flex: none; }
.hint { color: var(--muted); font-size: 0.95rem; margin: -4px 0 12px; }

.token-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.choice { position: relative; display: flex; align-items: center; gap: 12px; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: var(--r-m); cursor: pointer; background: var(--card); min-width: 0; }
.choice input { position: absolute; opacity: 0; pointer-events: none; }
.choice:hover { border-color: var(--muted); }
.choice:has(input:checked) { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green); background: var(--green-soft); }
.choice:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }
.choice b { display: block; font-size: 1.02rem; line-height: 1.2; }
.choice small { display: block; color: var(--muted); font-size: 0.85rem; line-height: 1.3; }
.tok-badge { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: var(--c); color: #fff; font: 700 1.05rem/1 var(--font-body); flex: none; }
.token-row .any { grid-column: 1 / -1; }
.any-badge { background: var(--ink); color: var(--paper); }
.any-badge svg { width: 22px; height: 22px; }
#sym-wrap { margin-top: 12px; }

.nets { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.net { padding: 10px 14px; }
.net .net-txt { min-width: 0; }
.net .pfx { margin-left: auto; font: 600 0.8rem/1 var(--font-addr); color: var(--muted); white-space: nowrap; }
.nets .choice:last-child:nth-child(odd) { grid-column: 1 / -1; }
.unsure { margin-top: 12px; font-size: 0.95rem; }
.unsure summary { cursor: pointer; color: var(--green); font-weight: 700; }
.unsure div { margin-top: 8px; color: var(--muted); display: grid; gap: 8px; }

.addr-row { display: flex; gap: 8px; }
.addr-row input, .field input {
  flex: 1; min-width: 0; font: 500 1rem/1.4 var(--font-addr); color: var(--ink);
  background: var(--paper); border: 1.5px solid var(--line); border-radius: var(--r-m); padding: 13px 14px;
}
.addr-row input::placeholder, .field input::placeholder { color: var(--muted); opacity: 0.9; font-family: var(--font-body); }
.addr-row input:focus, .field input:focus { border-color: var(--green); outline: none; box-shadow: 0 0 0 3px var(--green-soft); }
.field { display: grid; gap: 6px; margin-top: 14px; font-size: 0.95rem; }
.status { margin-top: 10px; min-height: 1.5em; font-size: 0.95rem; display: flex; gap: 8px; align-items: flex-start; }
.status svg { width: 18px; height: 18px; flex: none; margin-top: 3px; }
.status.ok { color: var(--green); }
.status.bad { color: var(--bad); }
.status.warn { color: var(--ink); background: var(--amber-soft); border-radius: var(--r-s); padding: 8px 10px; }
.status .switch { font: inherit; font-weight: 700; color: var(--green); background: none; border: 0; padding: 0; text-decoration: underline; cursor: pointer; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 700 0.98rem/1 var(--font-body); padding: 13px 16px; border-radius: var(--r-m); border: 1.5px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; text-decoration: none; }
.btn:hover:not(:disabled) { border-color: var(--ink); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn.primary { background: var(--green); border-color: var(--green); color: var(--green-ink); }
.btn.primary:hover:not(:disabled) { filter: brightness(1.08); border-color: var(--green); }

/* Ticket */
.ticket-wrap { position: sticky; top: calc(16px + env(safe-area-inset-top, 0px)); display: grid; gap: 14px; }
.ticket {
  position: relative; background: var(--ticket-bg); color: var(--ticket-ink); border-radius: var(--r-m);
  box-shadow: 0 1px 0 rgba(19, 36, 29, 0.06), 0 18px 40px -18px rgba(19, 36, 29, 0.35);
  overflow: hidden;
}
.t-band { background: var(--amber); color: var(--amber-ink); padding: 14px 20px; font: 700 1.05rem/1.3 var(--font-display); }
.t-band b { font-weight: 800; }
.t-body { padding: 18px 22px 20px; display: grid; gap: 14px; justify-items: center; }
.t-qr { width: 100%; max-width: 300px; aspect-ratio: 1; }
.t-qr svg { width: 100%; height: 100%; display: block; }
.t-addr { font: 600 1.02rem/1.55 var(--font-addr); text-align: center; letter-spacing: 0.01em; word-break: break-all; }
.t-addr span { display: inline-block; margin: 0 0.18em; }
.t-addr span:first-child, .t-addr span:last-child { background: #e7f2ec; border-radius: 4px; padding: 0 3px; }
.t-addr.empty { font: 400 0.95rem/1.5 var(--font-body); color: var(--ticket-muted); }
.t-check { display: inline-flex; gap: 6px; align-items: center; font-size: 0.88rem; color: var(--ticket-muted); }
.t-check svg { width: 15px; height: 15px; }
.t-perf { position: relative; height: 0; border-top: 2px dashed #cfd8d3; margin: 0 14px; }
.t-perf::before, .t-perf::after { content: ""; position: absolute; top: -12px; width: 22px; height: 22px; border-radius: 50%; background: var(--paper); }
.t-perf::before { left: -26px; }
.t-perf::after { right: -26px; }
.t-foot { padding: 12px 22px 16px; font-size: 0.86rem; color: var(--ticket-muted); text-align: center; }
.t-foot strong { color: var(--ticket-ink); }
.ribbon { position: absolute; top: 96px; right: -40px; transform: rotate(35deg); background: var(--ticket-ink); color: #fff; font: 700 0.8rem/1 var(--font-body); padding: 7px 44px; letter-spacing: 0.06em; }
.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.actions .wide { grid-column: 1 / -1; }
.toast { min-height: 1.4em; font-size: 0.92rem; color: var(--green); text-align: center; }

/* Content sections */
.section { padding-block: 44px; }
.section + .section { border-top: 1px solid var(--line); }
.section > .wrap > h2 { margin-bottom: 18px; }
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 14px; }
.prose h2 { margin-top: 34px; }
.prose h3 { margin-top: 24px; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 6px; }
.prose code { font: 0.92em var(--font-addr); background: var(--green-soft); padding: 1px 5px; border-radius: 5px; word-break: break-all; }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-family: var(--font-display); }
.table-scroll { overflow-x: auto; }
.callout { background: var(--amber-soft); border-radius: var(--r-m); padding: 16px 18px; }

.netmap { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: var(--r-l); overflow: hidden; background: var(--card); }
.netmap > div { padding: 18px 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-right: -1px; margin-bottom: -1px; display: grid; gap: 6px; align-content: start; }
.netmap .pfx { font: 600 0.9rem/1.3 var(--font-addr); color: var(--green); }
.netmap p { color: var(--muted); font-size: 0.95rem; }

.faq { display: grid; gap: 10px; max-width: 760px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-m); padding: 14px 18px; }
.faq summary { cursor: pointer; font-weight: 700; list-style-position: outside; }
.faq details p { margin-top: 10px; color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 14px; }
.card-link { display: grid; gap: 8px; align-content: start; padding: 18px 20px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-m); text-decoration: none; color: var(--ink); }
.card-link:hover { border-color: var(--green); }
.card-link .meta { font-size: 0.85rem; color: var(--muted); }
.card-link p { color: var(--muted); font-size: 0.95rem; }

/* Article */
.article-head { padding-block: 26px 10px; }
.article-head .meta { color: var(--muted); margin-top: 10px; font-size: 0.95rem; }
.crumbs { font-size: 0.9rem; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.article { padding-block: 10px 50px; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); padding-block: 34px 44px; font-size: 0.93rem; color: var(--muted); }
.site-foot .cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
.site-foot h3 { font-size: 0.95rem; color: var(--ink); margin-bottom: 8px; }
.site-foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.site-foot a { color: var(--muted); }
.site-foot .fine { margin-top: 24px; font-size: 0.85rem; }

/* Save overlay (used when the browser blocks downloads) */
.overlay { position: fixed; inset: 0; background: rgba(8, 16, 12, 0.72); display: grid; place-items: center; padding: 24px; z-index: 30; }
.overlay-box { background: var(--card); color: var(--ink); border-radius: var(--r-l); padding: 18px; max-width: 420px; width: 100%; display: grid; gap: 12px; text-align: center; }
.overlay-box img { width: 100%; border-radius: var(--r-s); background: #fff; }

@media (max-width: 900px) {
  .tool { grid-template-columns: minmax(0, 1fr); }
  .ticket-wrap { position: static; max-width: 440px; width: 100%; margin: 0 auto; }
  .site-foot .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .nav { width: 100%; flex-wrap: nowrap; overflow-x: auto; gap: 18px; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .nav a { white-space: nowrap; }
  .steps { padding: 4px 16px; border-radius: var(--r-m); }
  .nets { grid-template-columns: minmax(0, 1fr); }
  .site-foot .cols { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

/* Print: only the ticket */
@media print {
  @page { margin: 12mm; }
  body { background: #fff; }
  body * { visibility: hidden; }
  .ticket, .ticket * { visibility: visible; }
  .ticket { position: absolute; left: 0; top: 0; width: 100mm; box-shadow: none; border: 1px solid #ccc; }
  .ribbon, .t-perf::before, .t-perf::after { display: none; }
}