/* Ledger — the family ink-and-copper. The signature here is the gap between two columns: the whole
   subject of this tool lives in the space between the systems, so the wires drawn across it are the
   thing the eye should go to first. */

:root {
  --ink: #151C2C;
  --graphite: #1C2436;
  --panel: #10151F;
  --hair: rgba(255, 255, 255, .09);
  --glass: rgba(255, 255, 255, .04);
  --glass-b: rgba(255, 255, 255, .1);
  --text: #E8ECF0;
  --muted: #98A2AD;
  --dim: #6C7686;
  --copper: #D9884A;
  --copper-t: #F0A868;
  --green: #5FB98F;
  --red: #E4695B;
  --amber: #E0A64B;
  --violet: #9E8CD8;
  --sans: Geist, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --r: 13px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--ink); color: var(--text);
  font: 400 16px/1.55 var(--sans); -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(56% 34% at 50% 0%, rgba(217, 136, 74, .12), transparent 70%);
  background-repeat: no-repeat; overflow-x: hidden;
}
.mono { font-family: var(--mono); }
.wrap { width: 100%; max-width: 1320px; margin-inline: auto; padding-inline: 24px; }
h1, h2, h3 { margin: 0; letter-spacing: -.025em; text-wrap: balance; }
p { margin: 0 0 14px; }
a { color: var(--copper-t); }

.eyebrow { font: 500 11.5px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.quiet { color: var(--muted); }
.small { font-size: 13.5px; }
.note { color: var(--dim); font-size: 12.5px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; cursor: pointer;
  padding: 10px 18px; font: 500 13.5px/1 var(--sans); border: 1px solid var(--glass-b);
  background: var(--glass); color: var(--text); text-decoration: none; white-space: nowrap;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { border-color: rgba(255, 255, 255, .22); background: rgba(255, 255, 255, .08); }
.btn.primary { background: linear-gradient(140deg, #F0A868, #D9884A); border-color: transparent; color: #17120C; font-weight: 600; }
.btn.primary:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn.on { background: var(--text); border-color: var(--text); color: var(--ink); }

/* header */
.top { position: sticky; top: 0; z-index: 30; backdrop-filter: blur(14px); background: rgba(21, 28, 44, .82); border-bottom: 1px solid var(--hair); }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; min-width: 0; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: inherit; }
.mark svg { width: 30px; height: 30px; display: block; }
.mark rect { fill: var(--copper); }
.mark .l, .mark .x { stroke: #151C2C; fill: none; stroke-linecap: round; }
.mark .l { stroke-width: 2.6; }
.mark .x { stroke-width: 2.2; }
.brand-t { display: flex; flex-direction: column; line-height: 1.15; }
.brand-t b { font-size: 15px; font-weight: 600; }
.brand-t i { font-style: normal; font: 400 10.5px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.top-right { display: flex; align-items: center; justify-content: flex-end; gap: 12px; min-width: 0; flex: 1 1 auto; }
.health { font-size: 11.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; flex: 0 1 auto; }

/* hero */
.hero { padding: 58px 24px 22px; }
.hero h1 { margin-top: 13px; font: 600 clamp(31px, 4.8vw, 56px)/1.05 var(--sans); letter-spacing: -.038em; max-width: 20ch; }
.hero h1 em { font-style: normal; color: var(--copper-t); }
.lede { margin-top: 17px; font-size: 17px; line-height: 1.55; color: var(--muted); max-width: 70ch; }

/* controls */
.tool { padding: 6px 24px 18px; }
.bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.bar-l, .bar-r { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.sel { display: inline-flex; align-items: center; gap: 9px; border: 1px solid var(--glass-b); background: var(--glass); border-radius: 999px; padding: 6px 8px 6px 15px; }
.sel span { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.sel select { background: rgba(0, 0, 0, .3); color: var(--text); border: 1px solid var(--glass-b); border-radius: 999px; padding: 6px 11px; font: 500 12.5px/1 var(--sans); cursor: pointer; }
.runcount { font-size: 12px; color: var(--dim); }
.drifts { display: grid; grid-template-columns: repeat(auto-fit, minmax(216px, 1fr)); gap: 8px; margin-top: 14px; }
.drift { text-align: left; cursor: pointer; border: 1px solid var(--hair); border-radius: 12px; padding: 12px 14px; background: rgba(255, 255, 255, .022); color: var(--text); font: inherit; transition: border-color .2s var(--ease), background .2s var(--ease); }
.drift:hover { border-color: rgba(217, 136, 74, .45); background: rgba(217, 136, 74, .06); }
.drift b { display: block; font: 600 13px/1.3 var(--sans); }
.drift span { display: block; margin-top: 5px; font-size: 12px; line-height: 1.5; color: var(--muted); }
.said { margin: 12px 0 0; min-height: 18px; font-size: 12.5px; color: var(--copper-t); }

/* the board */
.board-wrap { padding: 8px 24px 10px; }
.board { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(48px, 9vw, 132px); }
.wires { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; overflow: visible; }
.wires path { fill: none; stroke-width: 1.6; opacity: .75; }
.wires .w-ok { stroke: rgba(255, 255, 255, .18); }
.wires .w-move { stroke: var(--copper); stroke-width: 2.2; }
.wires .w-conf { stroke: var(--amber); stroke-width: 2.2; stroke-dasharray: 5 4; }
.wires .w-block { stroke: var(--red); stroke-width: 2.2; stroke-dasharray: 2 4; }
.wires .w-prop { stroke: var(--violet); stroke-dasharray: 6 6; }
html.motion .wires .w-move { stroke-dasharray: 7 9; animation: flow 1.1s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -32; } }

.col { min-width: 0; position: relative; z-index: 2; }
.col-h { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding-bottom: 10px; margin-bottom: 12px; border-bottom: 1px solid var(--hair); }
.col-h h2 { font: 600 17px/1.2 var(--sans); }
.col-n { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); }
.stack { display: grid; gap: 9px; }

.rec {
  border: 1px solid var(--hair); border-radius: 12px; padding: 12px 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .04), rgba(255, 255, 255, .014));
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.rec.lit { border-color: rgba(217, 136, 74, .55); box-shadow: 0 0 0 3px rgba(217, 136, 74, .1); }
.rec.conf { border-color: rgba(224, 166, 75, .55); box-shadow: 0 0 0 3px rgba(224, 166, 75, .1); }
.rec.block { border-color: rgba(228, 105, 91, .5); box-shadow: 0 0 0 3px rgba(228, 105, 91, .09); }
.rec.fresh { border-color: rgba(95, 185, 143, .5); }
.rec-h { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.rec-n { font: 600 14px/1.3 var(--sans); min-width: 0; word-break: break-word; }
.rec-id { font: 400 10.5px/1 var(--mono); color: var(--dim); white-space: nowrap; }
.rec-f { display: grid; grid-template-columns: 78px minmax(0, 1fr); gap: 4px 10px; margin-top: 9px; }
.rec-f dt { font: 400 10.5px/1.6 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }
.rec-f dd { margin: 0; font: 400 12.5px/1.6 var(--mono); color: var(--muted); min-width: 0; word-break: break-word; }
.rec-f dd.hit { color: var(--copper-t); }
.rec-f dd.empty { color: rgba(255, 255, 255, .18); }
.rec-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
.rtag { font: 400 10px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; padding: 4px 7px; border-radius: 999px; border: 1px solid var(--glass-b); color: var(--dim); }
.rtag.new { color: var(--green); border-color: rgba(95, 185, 143, .35); }
.rtag.derived { color: var(--violet); border-color: rgba(158, 140, 216, .32); }

.legend { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 16px 0 0; font-size: 11.5px; color: var(--dim); }
.lg { display: inline-flex; align-items: center; gap: 7px; }
.lg i { width: 18px; height: 2px; border-radius: 2px; display: inline-block; }
.lg i.w-ok { background: rgba(255, 255, 255, .3); }
.lg i.w-move { background: var(--copper); }
.lg i.w-conf { background: var(--amber); }
.lg i.w-block { background: var(--red); }
.lg i.w-prop { background: var(--violet); }

/* the run log */
.out { padding: 22px 24px 26px; }
.out-head { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; justify-content: space-between; padding-bottom: 14px; border-bottom: 1px solid var(--hair); }
.out-head h2 { font: 600 clamp(21px, 2.4vw, 29px)/1.1 var(--sans); }
.summary { margin: 6px 0 0; color: var(--muted); font-size: 15px; max-width: 78ch; }
.summary b { color: var(--text); font-weight: 500; }
.summary .good { color: var(--green); font-weight: 600; }
.summary .mid { color: var(--amber); font-weight: 600; }
.out-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.log { display: grid; gap: 7px; margin-top: 18px; }
.op {
  display: grid; grid-template-columns: 116px minmax(0, 1fr); gap: 16px;
  border: 1px solid var(--hair); border-left-width: 3px; border-radius: 11px;
  padding: 13px 16px; background: rgba(255, 255, 255, .022);
}
.op.k-update, .op.k-align { border-left-color: var(--copper); }
.op.k-conflict-resolved { border-left-color: var(--amber); }
.op.k-conflict, .op.k-blocked, .op.k-deleted { border-left-color: var(--red); }
.op.k-create, .op.k-link { border-left-color: var(--green); }
.op.k-propose-link { border-left-color: var(--violet); }
.op.k-one-way, .op.k-derived { border-left-color: rgba(255, 255, 255, .2); }
.op-k { font: 500 10.5px/1.6 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.op.k-update .op-k, .op.k-align .op-k { color: var(--copper-t); }
.op.k-conflict-resolved .op-k { color: var(--amber); }
.op.k-conflict .op-k, .op.k-blocked .op-k { color: var(--red); }
.op.k-create .op-k, .op.k-link .op-k { color: var(--green); }
.op.k-propose-link .op-k { color: var(--violet); }
.op-t { font: 600 14px/1.35 var(--sans); }
.op-t .who { color: var(--muted); font-weight: 400; }
.op-v { margin: 7px 0 0; font: 400 12.5px/1.7 var(--mono); display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.op-v .from { color: var(--dim); text-decoration: line-through; text-decoration-color: rgba(228, 105, 91, .55); }
.op-v .to { color: var(--copper-t); }
.op-v .arrow { color: var(--dim); }
.op-v .side { font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); border: 1px solid var(--glass-b); border-radius: 999px; padding: 2px 7px; }
.op-d { margin: 8px 0 0; font-size: 13px; line-height: 1.6; color: var(--muted); }
.op-btn { margin-top: 9px; display: flex; gap: 7px; flex-wrap: wrap; }
.op-btn button { cursor: pointer; border: 1px solid var(--glass-b); background: var(--glass); color: var(--text); border-radius: 999px; padding: 7px 13px; font: 500 12px/1 var(--sans); }
.op-btn button:hover { border-color: var(--copper); color: var(--copper-t); }

/* the field map */
.maps { display: grid; gap: 8px; }
.mrow { display: grid; grid-template-columns: minmax(0, 1fr) 120px minmax(0, 1fr); gap: 14px; align-items: center; border: 1px solid var(--hair); border-radius: 12px; padding: 13px 16px; background: rgba(255, 255, 255, .022); }
.mside { font: 400 13px/1.5 var(--mono); min-width: 0; word-break: break-word; }
.mside.r { text-align: right; }
.mside b { color: var(--text); font-weight: 500; }
.mside i { font-style: normal; color: var(--dim); }
.mdir { text-align: center; font: 400 11px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }
.mdir .two { color: var(--copper-t); }
.mdir .one { color: var(--violet); }
.mdir .lossy { color: var(--red); }
.mnote { grid-column: 1 / -1; margin: 4px 0 0; font-size: 12.5px; line-height: 1.6; color: var(--muted); }

/* the model panel */
.suggest { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; }
.lab { display: block; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--dim); margin-bottom: 7px; }
textarea { width: 100%; padding: 13px 15px; border-radius: var(--r); resize: vertical; border: 1px solid var(--glass-b); background: rgba(0, 0, 0, .24); color: var(--text); font: 400 12.5px/1.6 var(--mono); }
textarea:focus { outline: none; border-color: var(--copper); }
.go-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.sug-out { display: grid; gap: 7px; margin-top: 14px; }
.sug { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; border: 1px solid var(--hair); border-radius: 10px; padding: 10px 14px; font: 400 12.5px/1.5 var(--mono); background: rgba(255, 255, 255, .022); }
.sug .who { font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); white-space: nowrap; }
.sug.both { border-color: rgba(95, 185, 143, .35); }
.sug.both .who { color: var(--green); }
.sug.model .who { color: var(--violet); }
.sug.rules .who { color: var(--copper-t); }

/* bands */
.band { padding: 32px 24px; border-top: 1px solid var(--hair); margin-top: 30px; }
.sec-head { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); gap: 14px; }
.card { border: 1px solid var(--hair); border-radius: 16px; background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .012)); padding: 20px 22px; }
.card h3 { font: 600 16px/1.25 var(--sans); }
.card p { font-size: 13.5px; line-height: 1.62; color: var(--muted); margin: 10px 0 0; }
.card p em { font-style: normal; color: var(--text); }
.card-p { margin: 16px 0 0; font-size: 13.5px; line-height: 1.62; color: var(--muted); max-width: 92ch; }
.card-p em { font-style: normal; color: var(--text); }
.tag { font-size: 11px !important; letter-spacing: .09em; text-transform: uppercase; color: var(--dim) !important; margin-top: 12px !important; }
.built { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 26px; }
.built h3 { font: 600 15px/1.3 var(--sans); margin-bottom: 12px; }
.list { margin: 0; padding-left: 18px; display: grid; gap: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.55; }

.foot { border-top: 1px solid var(--hair); padding: 22px 0 34px; margin-top: 26px; }
.foot-row { display: flex; flex-wrap: wrap; gap: 12px 22px; justify-content: space-between; align-items: center; }
.foot p { margin: 0; font-size: 12.5px; color: var(--dim); }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--copper-t); }

.toast { position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%); background: var(--text); color: var(--ink); padding: 11px 18px; border-radius: 999px; font: 500 13px/1 var(--sans); z-index: 60; box-shadow: 0 12px 34px rgba(0, 0, 0, .4); }

@media (max-width: 900px) {
  /* Stacked, the gap between the columns no longer exists, so the wires have nothing to cross.
     Each record carries its link as a badge instead. */
  .board { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .wires { display: none; }
  .op { grid-template-columns: minmax(0, 1fr); gap: 5px; }
  .mrow { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .mside.r { text-align: left; }
  .mdir { text-align: left; }
}
@media (max-width: 560px) {
  .hero { padding-top: 40px; }
  .rec-f { grid-template-columns: minmax(0, 1fr); gap: 1px; }
  .rec-f dt { margin-top: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Review 2026-09-08: the limits list ran straight into the paragraph after it; the phone header
   squeezed the brand tagline onto three lines and clipped the counter. */
.list + p { margin-top: 14px; }
@media (max-width: 560px) {
  .top-right .btn { display: none; }
  .brand-t i { display: none; }
}