:root {
  --paper: #f4efe3;
  --paper-2: #ebe4d3;
  --rule: #d9cfb8;
  --ink: #1c1a17;
  --ink-2: #4a453c;
  --ink-3: #7c7466;
  --yes: #1f6b45;
  --yes-tint: #d8e8dc;
  --no: #a1291b;
  --no-tint: #f1d9d3;
  --stamp: #c8341f;
  --gold: #b88a2b;
  --serif: "Fraunces", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.55 var(--sans);
  /* faint paper grain + ledger margin line */
  background-image:
    linear-gradient(90deg, transparent 0 calc(50% - 600px - 1px), rgba(200, 52, 31, .18) calc(50% - 600px - 1px) calc(50% - 600px), transparent calc(50% - 600px)),
    radial-gradient(rgba(28, 26, 23, .035) 1px, transparent 1px);
  background-size: 100% 100%, 3px 3px;
}
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
[hidden] { display: none !important; }

.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 14px;
  padding: 12px clamp(16px, 4vw, 40px);
  background: rgba(244, 239, 227, .92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}
.mark { font: italic 600 24px/1 var(--serif); text-decoration: none; letter-spacing: -.01em; }
.net, .demo {
  font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em;
  padding: 5px 8px; border: 1px solid var(--ink-3); border-radius: 3px; color: var(--ink-2);
}
.demo { border-color: var(--stamp); color: var(--stamp); transform: rotate(-2deg); }
.top nav { margin-left: auto; display: flex; gap: 22px; }
.top nav a { text-decoration: none; font-size: 14px; color: var(--ink-2); }
.top nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 4px; padding: 10px 16px; font-weight: 600; font-size: 14px;
  text-decoration: none; border: 1.5px solid var(--ink); transition: transform .12s, background .12s;
}
.btn:active { transform: translateY(1px); }
.btn.ink { background: var(--ink); color: var(--paper); }
.btn.ink:hover { background: #000; }
.btn.ghost { background: transparent; }
.btn.ghost:hover { background: var(--paper-2); }
.btn.wide { width: 100%; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn.yes { background: var(--yes); border-color: var(--yes); color: #fff; }
.btn.no { background: var(--no); border-color: var(--no); color: #fff; }

main { max-width: 1200px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px); }

.hero { padding: 64px 0 40px; max-width: 820px; }
.kicker { font: 500 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--stamp); margin: 0 0 18px; }
.hero h1 { font: 600 clamp(40px, 6vw, 72px)/1.02 var(--serif); letter-spacing: -.025em; margin: 0 0 20px; }
.hero h1 em { font-style: italic; font-weight: 400; color: var(--stamp); }
.lede { font-size: 18px; color: var(--ink-2); max-width: 640px; margin: 0 0 28px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

h2 { font: 600 32px/1.1 var(--serif); letter-spacing: -.015em; margin: 0; }

/* ───────── the board ───────── */
.board { padding: 36px 0 56px; }
.board-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--rule); }
.tab { background: none; border: 0; padding: 8px 12px; font-size: 14px; color: var(--ink-3); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab.on { color: var(--ink); border-color: var(--ink); font-weight: 600; }
.tab .n { font: 500 11px var(--mono); margin-left: 4px; color: var(--ink-3); }

.ledger { border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.ledger-row {
  display: grid;
  grid-template-columns: 1.15fr 1.5fr 1.05fr 1.6fr .8fr 1fr;
  gap: 16px; align-items: center;
  padding: 14px 6px;
  border-bottom: 1px solid var(--rule);
}
.ledger-row.head { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); padding: 10px 6px; }
.ledger-row.m { cursor: pointer; transition: background .12s; }
.ledger-row.m:hover { background: rgba(28, 26, 23, .04); }
.coin b { font: 600 17px/1.1 var(--serif); display: block; }
.coin small, .sub { font: 400 11.5px var(--mono); color: var(--ink-3); }
.line { font-size: 14px; }
.line b { font-family: var(--mono); font-weight: 600; }
.num { font: 500 14px var(--mono); }
.dist { font: 500 11.5px var(--mono); }
.dist.up { color: var(--yes); }
.dist.down { color: var(--no); }

.split { display: grid; gap: 5px; }
.split .bar { display: flex; height: 8px; border-radius: 2px; overflow: hidden; background: var(--paper-2); }
.split .bar i { display: block; }
.split .bar .y { background: var(--yes); }
.split .bar .n { background: var(--no); }
.split .legend { display: flex; justify-content: space-between; font: 500 11.5px var(--mono); }
.split .legend .y { color: var(--yes); }
.split .legend .n { color: var(--no); }

.clock { font: 500 13px var(--mono); }
.stamp {
  display: inline-block; font: 600 11px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  padding: 5px 7px; border: 1.5px solid currentColor; border-radius: 3px; transform: rotate(-3deg);
}
.stamp.yes { color: var(--yes); }
.stamp.no { color: var(--no); }
.stamp.void { color: var(--ink-3); }
.stamp.settle { color: var(--stamp); animation: pulse 1.6s ease-in-out infinite; }
.stamp.measure { color: var(--gold); }
@keyframes pulse { 50% { opacity: .55; } }
.empty { padding: 28px 6px; color: var(--ink-3); font-style: italic; }
.venue { font: 600 9.5px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; padding: 2px 4px; border-radius: 2px; margin-right: 4px; vertical-align: 1px; }
.venue.v3 { background: var(--paper-2); color: var(--ink-2); }
.venue.ascend { background: #e9e2f3; color: #4b3a78; }
.slots { display: inline-flex; gap: 3px; margin: 0 0 0 8px; vertical-align: middle; }
.slots i { width: 7px; height: 7px; border-radius: 50%; border: 1.2px solid var(--ink-3); }
.slots i.on { background: var(--ink); border-color: var(--ink); }
.slots i.cur { border-color: var(--stamp); box-shadow: 0 0 0 2px rgba(200, 52, 31, .18); }
.samples button em { font-style: normal; color: var(--ink-3); }

.snaps { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--rule); }
.snaps-head { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); margin: 0 0 10px; }
.snap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-bottom: 10px; }
.snap { border: 1px dashed var(--rule); border-radius: 4px; padding: 7px 8px; display: grid; gap: 2px; }
.snap span { font: 400 10.5px var(--mono); color: var(--ink-3); }
.snap b { font: 500 13px var(--mono); }
.snap.on { border-style: solid; border-color: var(--ink-3); background: #fff; }
.snap.cur { border-color: var(--stamp); }
.snaps .fine { margin: 0 0 12px; font-size: 12.5px; }

/* ───────── write a line ───────── */
.write { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; padding: 40px 0 64px; border-top: 1px solid var(--rule); align-items: start; }
.write-copy p { color: var(--ink-2); max-width: 420px; }
.fine { font-size: 13px; color: var(--ink-3) !important; }
.ticket {
  position: relative; background: #fbf8f1; padding: 26px 26px 22px;
  border: 1px solid var(--rule); border-radius: 6px;
  box-shadow: 0 1px 0 var(--rule), 0 18px 40px -24px rgba(28, 26, 23, .35);
}
.ticket::before, .ticket::after { /* punched holes */
  content: ""; position: absolute; top: 50%; width: 18px; height: 18px; border-radius: 50%;
  background: var(--paper); border: 1px solid var(--rule);
}
.ticket::before { left: -10px; }
.ticket::after { right: -10px; }
.field { display: grid; gap: 8px; margin-bottom: 18px; }
.field > span { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); }
input {
  font: 500 15px var(--mono); color: var(--ink); background: transparent;
  border: 0; border-bottom: 1.5px solid var(--ink-3); padding: 8px 2px; width: 100%; outline: none; border-radius: 0;
}
input:focus { border-color: var(--ink); }
.inline { display: flex; align-items: center; gap: 8px; }
.inline em { font: italic 400 14px var(--serif); color: var(--ink-3); }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chips button, .samples button {
  background: transparent; border: 1px solid var(--rule); border-radius: 999px; padding: 6px 12px; font-size: 13px;
}
.chips button:hover, .samples button:hover { border-color: var(--ink-3); }
.chips button.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.samples { display: flex; gap: 6px; flex-wrap: wrap; margin: -6px 0 16px; }
.samples button { font: 500 12px var(--mono); }
.coin-now { background: var(--paper-2); border-radius: 4px; padding: 10px 12px; margin: -4px 0 18px; font-size: 14px; }
.coin-now b { font-family: var(--serif); }
.preview { font: italic 400 19px/1.35 var(--serif); margin: 4px 0 16px; padding-top: 14px; border-top: 1px dashed var(--rule); }
.msg { min-height: 20px; margin: 10px 0 0; font-size: 13px; color: var(--ink-2); }
.msg.err { color: var(--no); }

/* ───────── how ───────── */
.how { padding: 40px 0 72px; border-top: 1px solid var(--rule); }
.how-body { display: grid; grid-template-columns: 1.3fr 1fr; gap: 12px 48px; margin-top: 18px; }
.how-body > p { margin: 0; color: var(--ink-2); font-size: 16px; max-width: 620px; }
.how-body aside { grid-row: span 2; border-left: 2px solid var(--stamp); padding-left: 20px; }
.how-body aside p { margin: 0 0 14px; font-size: 14px; color: var(--ink-2); }
.how-body aside b { color: var(--ink); }

/* ───────── slip ───────── */
.scrim { position: fixed; inset: 0; background: rgba(28, 26, 23, .32); opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 30; }
.slip {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(440px, 100%); z-index: 40;
  transform: translateX(105%); transition: transform .28s cubic-bezier(.2, .8, .2, 1);
  padding: 16px; display: flex;
}
body.slip-open .slip { transform: none; }
body.slip-open .scrim { opacity: 1; pointer-events: auto; }
.slip-paper {
  position: relative; flex: 1; overflow-y: auto; background: #fbf8f1; border-radius: 6px;
  padding: 26px 24px 24px; box-shadow: -12px 0 40px -18px rgba(28, 26, 23, .5);
  /* perforated top edge */
  background-image: radial-gradient(circle at 8px -2px, var(--paper) 5px, transparent 5.5px);
  background-size: 16px 10px; background-repeat: repeat-x;
}
.close { position: absolute; top: 12px; right: 14px; background: none; border: 0; font-size: 26px; line-height: 1; color: var(--ink-3); }
.slip h3 { font: 600 26px/1.15 var(--serif); margin: 4px 0 6px; letter-spacing: -.01em; }
.slip .q { font: italic 400 18px/1.4 var(--serif); color: var(--ink-2); margin: 0 0 18px; }
.slip .rows { border-top: 1px solid var(--rule); margin-bottom: 16px; }
.slip .rows div { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px dashed var(--rule); font-size: 14px; }
.slip .rows div span:last-child { font: 500 14px var(--mono); }
.gauge { position: relative; height: 34px; margin: 6px 0 20px; }
.gauge .track { position: absolute; left: 0; right: 0; top: 14px; height: 6px; background: var(--paper-2); border-radius: 3px; }
.gauge .fill { position: absolute; left: 0; top: 14px; height: 6px; border-radius: 3px; background: var(--ink); }
.gauge .lineMark { position: absolute; top: 4px; width: 2px; height: 26px; background: var(--stamp); }
.gauge .lineMark::after { content: "line"; position: absolute; top: -14px; left: -10px; font: 500 10px var(--mono); color: var(--stamp); }
.sides { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.side { border: 1.5px solid var(--rule); border-radius: 6px; padding: 12px; text-align: left; background: transparent; }
.side .lbl { font: 600 13px var(--mono); letter-spacing: .08em; }
.side .pays { font: 600 24px/1.1 var(--serif); display: block; margin: 4px 0 2px; }
.side small { font: 400 11.5px var(--mono); color: var(--ink-3); }
.side.y .lbl { color: var(--yes); }
.side.n .lbl { color: var(--no); }
.side.y.on { border-color: var(--yes); background: var(--yes-tint); }
.side.n.on { border-color: var(--no); background: var(--no-tint); }
.amt { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; }
.amt input { font-size: 22px; }
.amt-chips { display: flex; gap: 6px; margin-bottom: 14px; }
.amt-chips button { flex: 1; background: transparent; border: 1px solid var(--rule); border-radius: 4px; padding: 5px 0; font: 500 12px var(--mono); }
.est { font-size: 13.5px; color: var(--ink-2); margin: 0 0 14px; min-height: 20px; }
.mine { background: var(--paper-2); border-radius: 4px; padding: 10px 12px; font-size: 13.5px; margin-bottom: 14px; }
.verdict { text-align: center; padding: 8px 0 18px; }
.verdict .stamp { font-size: 22px; padding: 10px 16px; border-width: 3px; }
.verdict p { margin: 14px 0 0; color: var(--ink-2); font-size: 14px; }

.foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  max-width: 1200px; margin: 0 auto; padding: 22px clamp(16px, 4vw, 40px) 36px;
  border-top: 2px solid var(--ink); font: 400 12px var(--mono); color: var(--ink-3);
}
.foot a { color: var(--ink-2); }

.toast {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 60;
  background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: 4px; font-size: 14px;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, .5);
}

@media (max-width: 900px) {
  .top nav { display: none; }
  .top .btn { margin-left: auto; }
  .ledger-row.head { display: none; }
  .ledger-row { grid-template-columns: 1fr 1fr; gap: 8px 14px; padding: 16px 4px; }
  .ledger-row .split { grid-column: 1 / -1; }
  .write { grid-template-columns: 1fr; gap: 24px; }
  .how-body { grid-template-columns: 1fr; }
  .how-body aside { grid-row: auto; }
  body { background-image: radial-gradient(rgba(28, 26, 23, .035) 1px, transparent 1px); background-size: 3px 3px; }
}
@media (max-width: 520px) {
  .net { display: none; }
  .hero { padding-top: 40px; }
}