:root {
  --ink: #111111;
  --paper: #ffffff;
  --wall: #e4e2dc;
  --rule: #c9c6bf;
  --mute: #6b6962;
  --mark: #e8341c;
  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --drawer: 440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
b { font-weight: 700; }
code { font-family: var(--mono); font-size: .86em; }
.muted { color: var(--mute); font-weight: 500; }
.label { font: 600 11px/1 var(--mono); color: var(--mute); letter-spacing: .06em; text-transform: uppercase; margin: 0 0 8px; }

/* ---------- stage ---------- */
#stage {
  position: relative;
  height: 100svh;
  min-height: 520px;
  background: var(--wall);
  overflow: hidden;
  touch-action: none;
  user-select: none;
}
#board { position: absolute; inset: 0; width: 100%; height: 100%; cursor: grab; display: block; }
#board.dragging { cursor: grabbing; }

.hud { position: absolute; z-index: 2; display: flex; flex-direction: column; gap: 6px; pointer-events: none; }
.hud > * { pointer-events: auto; }
.hud-tl { top: 16px; left: 16px; align-items: flex-start; }
.hud-tc { top: 16px; left: 50%; transform: translateX(-50%); }
.hud-tr { top: 16px; right: 16px; align-items: flex-end; transition: right .3s; }
.hud-br { bottom: 16px; right: 16px; align-items: flex-end; transition: right .3s; }
.hud-hint { left: 16px; bottom: 18px; font: 600 11px/1 var(--mono); letter-spacing: .04em; color: var(--mute); transition: opacity .6s; }
.hud-hint.gone { opacity: 0; }
#stage.sending .hud-br { right: calc(var(--drawer) + 16px); }
#stage.sending .hud-tr { display: none; }
#stage.sending .hud-tc { left: calc((100% - var(--drawer)) / 2); }
#stage.sending .hud-feed { display: none; }

.tape {
  background: var(--ink); color: var(--paper);
  padding: 7px 10px; font: 600 12px/1 var(--mono); letter-spacing: .02em;
  text-decoration: none; white-space: nowrap;
}
.tape.wordmark { font: 900 26px/1 var(--sans); font-stretch: 112%; letter-spacing: -.01em; text-transform: uppercase; padding: 8px 12px 9px; }
.tape.wordmark { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.tape.wordmark img { width: 26px; height: 26px; display: block; }
.tape.sub { color: #d8d6cf; }
.ca-row { display: flex; gap: 6px; flex-wrap: wrap; }
.tape.ca, .tape.xbtn { height: 36px; display: flex; align-items: center; gap: 10px; padding: 0 12px; border: 0; cursor: pointer; text-decoration: none; }
.tape.ca .ca-k { color: #bdbab2; }
.tape.ca .ca-v { color: #fff; }
.tape.ca .ca-c { color: #bdbab2; border-left: 1px solid #444; padding-left: 10px; }
.tape.ca:hover { background: #333; }
.tape.xbtn { gap: 8px; color: #fff; font-weight: 700; }
.tape.xbtn:hover { background: var(--mark); }
.tape.stats { display: flex; gap: 18px; }
.tape.stats b { color: #fff; }
.tape.stats span { color: #bdbab2; }
.tape.readout { color: #d8d6cf; min-width: 180px; text-align: right; }
.tape.zoom { display: flex; align-items: center; gap: 4px; padding: 4px; }
.tape.zoom button { background: transparent; border: 0; color: #fff; font: 700 14px/1 var(--mono); width: 28px; height: 26px; cursor: pointer; }
.tape.zoom button:hover { background: #333; }
.tape.zoom span { min-width: 48px; text-align: center; color: #bdbab2; }

.modes { display: flex; background: var(--ink); padding: 4px; gap: 4px; }
.mode {
  border: 0; background: transparent; color: #cfccc4; cursor: pointer;
  font: 800 13px/1 var(--sans); text-transform: uppercase; letter-spacing: .03em;
  padding: 10px 16px;
}
.mode:hover { color: #fff; }
.mode.on { background: var(--paper); color: var(--ink); }
.mode[data-mode="send"].on { background: var(--mark); color: #fff; }

.hud-feed { top: 70px; right: 16px; width: 300px; align-items: flex-end; }
.feed-item {
  background: var(--paper); border: 1.5px solid var(--ink); padding: 6px 9px;
  font: 500 12px/1.35 var(--mono); max-width: 100%;
  animation: feed-in .35s cubic-bezier(.2,.8,.2,1);
  display: flex; gap: 8px; align-items: baseline;
}
.feed-item .dot { width: 9px; height: 9px; flex: none; display: inline-block; transform: translateY(1px); }
.feed-item .who { font-weight: 600; }
.feed-item .took { color: var(--mark); }
.feed-item .cost { margin-left: auto; color: var(--mute); }
@keyframes feed-in { from { transform: translateX(24px); opacity: 0; } to { transform: none; opacity: 1; } }

.popover {
  position: absolute; z-index: 3; background: var(--paper); border: 1.5px solid var(--ink);
  padding: 8px 10px; font: 500 12px/1.4 var(--mono); max-width: 260px; pointer-events: none;
}
.popover .sw { display: inline-block; width: 11px; height: 11px; border: 1px solid var(--ink); vertical-align: -1px; margin-right: 5px; }
.popover b { font-weight: 600; }

/* ---------- drawer ---------- */
.drawer {
  position: absolute; top: 0; right: 0; bottom: 0; z-index: 4;
  width: var(--drawer); background: var(--paper); border-left: 1.5px solid var(--ink);
  display: flex; flex-direction: column; user-select: text;
  animation: drawer-in .3s cubic-bezier(.2,.8,.2,1);
}
.drawer[hidden] { display: none; }
.hud-tc { z-index: 5; }
@keyframes drawer-in { from { transform: translateX(30px); opacity: 0; } to { transform: none; opacity: 1; } }
.drawer-head { display: flex; align-items: baseline; gap: 10px; padding: 18px 20px 14px; border-bottom: 1.5px solid var(--ink); }
.drawer-head b { font: 800 18px/1 var(--sans); letter-spacing: -.01em; white-space: nowrap; }
.drawer-head .muted { font: 500 11.5px var(--mono); white-space: nowrap; }
.drawer-head .x { margin-left: auto; border: 0; background: transparent; font: 400 26px/1 var(--sans); cursor: pointer; padding: 0 4px; align-self: center; }
.drawer-body { overflow: auto; flex: 1; }
.drawer-foot { padding: 14px 20px 20px; font: 500 11.5px/1.5 var(--mono); display: flex; gap: 12px; align-items: center; justify-content: space-between; }
.agent-switch { display: flex; gap: 8px; align-items: center; padding: 12px 20px; border-bottom: 1px solid var(--rule); background: #f6f5f1; }
.agent-switch label { font: 600 11px/1 var(--mono); color: var(--mute); text-transform: uppercase; letter-spacing: .06em; }
.agent-switch select { flex: 1; border: 1.5px solid var(--ink); background: var(--paper); font: 600 13px var(--mono); padding: 6px 8px; }

.st { border-bottom: 1px solid var(--rule); }
.st-head { display: flex; align-items: center; gap: 12px; padding: 14px 20px; }
.st-n { width: 26px; height: 26px; display: grid; place-items: center; background: var(--ink); color: #fff; font: 800 13px/1 var(--mono); flex: none; }
.st.done .st-n { background: #0f9d58; }
.st.locked .st-n { background: var(--rule); color: var(--mute); }
.st-head h3 { margin: 0; font: 800 16px/1 var(--sans); letter-spacing: -.01em; flex: 1; }
.st-state { font: 600 11.5px/1 var(--mono); color: var(--mute); }
.st.done .st-state { color: #0f9d58; }
.st-body { padding: 0 20px 20px 58px; }
.st.locked .st-body { display: none; }
.st-body p { margin: 0 0 12px; font-size: 14px; color: #2a2925; }
.st-body p b { font-family: var(--mono); font-weight: 600; }

form[data-create] { display: flex; }
form[data-create] input, textarea[data-job] {
  flex: 1; min-width: 0; border: 1.5px solid var(--ink); background: var(--paper);
  padding: 10px 12px; font: 500 14px var(--mono); outline: none;
}
form[data-create] input { border-right: 0; }
form[data-create] input:focus, textarea[data-job]:focus { background: #fffbe8; }
textarea[data-job] { width: 100%; resize: vertical; margin-bottom: 14px; font-size: 13px; line-height: 1.45; }
button.solid, form[data-create] button {
  background: var(--ink); color: var(--paper); border: 1.5px solid var(--ink);
  padding: 10px 16px; font: 800 13px/1 var(--sans); text-transform: uppercase; letter-spacing: .03em; cursor: pointer;
}
button.solid:hover, form[data-create] button:hover { background: var(--mark); border-color: var(--mark); }
button.solid:disabled, form[data-create] button:disabled { opacity: .5; cursor: default; }
.ghost {
  background: var(--paper); color: var(--ink); border: 1.5px solid var(--ink);
  padding: 7px 10px; font: 700 12px/1 var(--mono); cursor: pointer;
}
.ghost:hover { background: var(--ink); color: var(--paper); }
.err { color: var(--mark); font: 500 13px var(--mono); margin-top: 8px; }
.ok { color: #0f9d58; font: 500 13px var(--mono); margin-top: 8px; }
a.linkbtn { text-decoration: none; display: inline-block; }
details.claim { margin-top: 16px; }
details.claim summary { cursor: pointer; font: 600 12px/1.4 var(--mono); color: var(--mute); margin-bottom: 10px; }
form[data-claim-form] { display: flex; }
form[data-claim-form] input { flex: 1; min-width: 0; border: 1.5px solid var(--ink); border-right: 0; padding: 9px 10px; font: 500 12px var(--mono); outline: none; }
form[data-claim-form] button { background: var(--ink); color: #fff; border: 1.5px solid var(--ink); padding: 9px 12px; font: 800 12px/1 var(--sans); text-transform: uppercase; cursor: pointer; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.fund { display: flex; gap: 16px; align-items: flex-start; }
.qr { width: 120px; height: 120px; flex: none; border: 1.5px solid var(--ink); padding: 6px; background: #fff; }
.qr svg { width: 100%; height: 100%; display: block; }
.fund-text { min-width: 0; flex: 1; }
.addr { font: 600 12.5px/1.45 var(--mono); word-break: break-all; margin-bottom: 8px; }
.bal { margin-top: 14px; display: grid; gap: 4px; }
.bal b { font: 600 24px/1 var(--mono); letter-spacing: -.02em; }
.bal .checking { font: 500 11px/1 var(--mono); color: var(--mute); }
.bal .checking.found { color: #0f9d58; }

pre.brief, details.curl pre {
  margin: 0 0 12px; background: #f6f5f1; border: 1px solid var(--rule); padding: 12px;
  color: var(--ink); font: 500 12px/1.5 var(--mono); white-space: pre-wrap; word-break: break-word; user-select: all;
}
details.curl { margin-top: 14px; }
details.curl summary { cursor: pointer; font: 600 12px/1 var(--mono); color: var(--mute); margin-bottom: 10px; }

/* ---------- sheets below the board ---------- */
main { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.sheet-head {
  display: flex; justify-content: space-between; align-items: baseline;
  border-top: 2px solid var(--ink); padding: 10px 0 0;
  font: 800 13px/1 var(--sans); text-transform: uppercase; letter-spacing: .08em;
}
.sheet-head .muted { font: 500 12px var(--mono); text-transform: none; letter-spacing: 0; text-decoration: none; }
.sheet-head a.muted:hover { text-decoration: underline; }
section.rules, section.ledger, section.spec { padding: 40px 0 56px; }

.rules-grid { display: grid; grid-template-columns: 1fr 300px; gap: 56px; margin-top: 28px; align-items: start; }
.rulelist { list-style: none; margin: 0; padding: 0; }
.rulelist li { display: grid; grid-template-columns: 64px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--rule); align-items: start; }
.rulelist li:first-child { border-top: 0; padding-top: 0; }
.rulelist .n { font: 900 44px/1 var(--sans); font-stretch: 80%; letter-spacing: -.04em; color: var(--ink); transform: translateY(-4px); }
.rulelist p { margin: 0; font-size: clamp(17px, 1.6vw, 21px); line-height: 1.35; letter-spacing: -.01em; max-width: 34ch; }
.rulelist p b { font-family: var(--mono); font-weight: 600; font-size: .92em; }
table.numbers { width: 100%; border-collapse: collapse; font: 500 13px/1.3 var(--mono); position: sticky; top: 20px; }
table.numbers td { padding: 9px 0; border-top: 1px solid var(--rule); }
table.numbers tr:last-child td { border-bottom: 1px solid var(--rule); }
table.numbers td:first-child { color: var(--mute); }
table.numbers td:last-child { text-align: right; font-weight: 600; }

.ledger-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; margin-top: 28px; }
.share { display: flex; height: 22px; border: 1.5px solid var(--ink); margin-bottom: 14px; overflow: hidden; }
.share span { display: block; height: 100%; min-width: 1px; }
.share .blank { background: var(--paper); }
ol.lb { list-style: none; margin: 0; padding: 0; }
ol.lb li { display: grid; grid-template-columns: 22px 12px 1fr auto; gap: 10px; align-items: center; padding: 8px 0; border-top: 1px solid var(--rule); font: 500 13px/1.3 var(--mono); }
ol.lb li.muted { grid-template-columns: 1fr; }
ol.lb .i { color: var(--mute); }
ol.lb .dot { width: 12px; height: 12px; display: inline-block; }
ol.lb .v { text-align: right; white-space: nowrap; }
ol.lb .v small { color: var(--mute); margin-left: 8px; }
table.calls { width: 100%; border-collapse: collapse; font: 500 12.5px/1.3 var(--mono); }
table.calls td { padding: 7px 0; border-top: 1px solid var(--rule); vertical-align: top; }
table.calls td.t { color: var(--mute); white-space: nowrap; padding-right: 12px; width: 1%; }
table.calls td.who { white-space: nowrap; padding-right: 12px; }
table.calls td.who .dot { width: 9px; height: 9px; display: inline-block; margin-right: 6px; }
table.calls td.took { color: var(--mark); }
table.calls td.v { text-align: right; white-space: nowrap; }

.spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 28px; align-items: start; }
table.endpoints { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.endpoints td { padding: 9px 10px 9px 0; border-top: 1px solid var(--rule); vertical-align: top; }
table.endpoints tr:last-child td { border-bottom: 1px solid var(--rule); }
table.endpoints td:first-child { white-space: nowrap; width: 1%; padding-right: 20px; }
pre { margin: 0; background: var(--ink); color: #f1efe8; padding: 14px 16px; overflow: auto; font: 500 12.5px/1.55 var(--mono); }
pre code { font-size: inherit; }

footer {
  border-top: 2px solid var(--ink); padding: 18px 24px 40px;
  display: flex; gap: 24px; font: 600 12px/1 var(--mono); letter-spacing: .04em; text-transform: uppercase;
  max-width: 1160px; margin: 0 auto;
}
footer a:last-child { margin-left: auto; }

@media (max-width: 980px) {
  .rules-grid, .ledger-grid, .spec-grid { grid-template-columns: 1fr; gap: 32px; }
  table.numbers { position: static; }
  .hud-feed { display: none; }
  .tape.sub { display: none; }
}
@media (max-width: 720px) {
  :root { --drawer: 100%; }
  .drawer { border-left: 0; }
  .drawer-body { padding-bottom: 76px; }
  .drawer-head .muted { display: none; }
  #stage.sending .hud-tr, #stage.sending .hud-br, #stage.sending .hud-tl, #stage.sending .hud-hint { display: none; }
  .hud-tc { top: auto; bottom: 16px; left: 16px; right: 16px; transform: none; }
  .modes { width: 100%; }
  .mode { flex: 1; padding: 12px 8px; }
  .hud-tr { top: 104px; right: auto; left: 16px; align-items: flex-start; }
  .tape.wordmark img { width: 20px; height: 20px; }
  .tape.stats { gap: 6px 10px; font-size: 11px; flex-wrap: wrap; max-width: calc(100vw - 32px); }
  .tape.readout { display: none; }
  .hud-br { bottom: 72px; }
  .hud-hint { display: none; }
  .tape.wordmark { font-size: 20px; }
  .st-body { padding-left: 20px; }
  .fund { flex-direction: column; }
  .rulelist li { grid-template-columns: 44px 1fr; }
  .rulelist .n { font-size: 32px; }
  main { padding: 0 16px; }
  footer { padding-left: 16px; padding-right: 16px; }
}