:root {
  /* Every value comes from the bdos-design look loaded in looks/<look>.css. */
  --bg: var(--bd-color-ground);
  --dot: var(--bd-color-line);
  --card: color-mix(in srgb, var(--bd-color-surface-raised) calc(var(--bd-material-glass-alpha) * 100%), transparent);
  --card-solid: var(--bd-color-surface-raised);
  --ink: var(--bd-color-ink);
  --muted: var(--bd-color-ink-secondary);
  --line: var(--bd-color-edge-hairline);
  --frame: color-mix(in srgb, var(--bd-color-surface-raised) 18%, transparent);
  --frame-line: color-mix(in srgb, var(--bd-color-ink) 22%, transparent);
  --accent: var(--bd-color-accent);
  --on-accent: var(--bd-color-on-accent);
  --accent-soft: color-mix(in srgb, var(--bd-color-accent) 16%, transparent);
  --ok: var(--bd-color-success);
  --ok-soft: color-mix(in srgb, var(--bd-color-success) 16%, transparent);
  --no: var(--bd-color-danger);
  --no-soft: color-mix(in srgb, var(--bd-color-danger) 16%, transparent);
  --wait: var(--bd-color-warning);
  --wait-soft: color-mix(in srgb, var(--bd-color-warning) 16%, transparent);
  --person: var(--bd-color-special);
  --person-soft: color-mix(in srgb, var(--bd-color-special) 16%, transparent);
  --code-bg: var(--bd-color-surface-sunken);
  --shadow: var(--bd-shadow-float);
  --radius: var(--bd-radius-card);
  --blur: var(--bd-material-glass-blur);
  --mono: var(--bd-type-family-mono);
  --sans: var(--bd-type-family-sans);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font: var(--bd-type-body-size, 15px)/1.5 var(--sans);
  transition: background-color .3s;
  overflow: hidden;
}
a { color: var(--accent); }
button, select, input, textarea { font: inherit; color: inherit; }

/* ---------- top bar ---------- */
.bar {
  position: fixed; inset: 12px 12px auto 12px; z-index: 10;
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  pointer-events: none;
}
.bar > * { pointer-events: auto; }
.pill {
  display: flex; gap: 2px; padding: 4px; border-radius: var(--radius); backdrop-filter: blur(var(--blur));
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.pill button {
  border: 0; background: transparent; padding: 6px 10px; border-radius: 7px; cursor: pointer;
  white-space: nowrap;
}
.pill button:hover { background: var(--accent-soft); }
.pill button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); }
.bar .spacer { flex: 1; }
.hint { color: var(--muted); font-size: 12px; padding: 0 6px; }

/* ---------- canvas ---------- */
.viewport {
  position: fixed; inset: 0; overflow: hidden; touch-action: none; cursor: grab;
  background-color: var(--bg);
  background-image: radial-gradient(var(--dot) 1.1px, transparent 1.2px);
}
.viewport.panning { cursor: grabbing; }
.world { position: absolute; left: 0; top: 0; transform-origin: 0 0; }
.wires { position: absolute; left: 0; top: 0; overflow: visible; pointer-events: none; }
.wires path { fill: none; stroke: var(--frame-line); stroke-width: 1.6; }
.wires path.live { stroke: var(--accent); stroke-dasharray: 5 5; }
.wires text { fill: var(--muted); font: 12px var(--sans); }
.wires .label-bg { fill: var(--bg); }

.frame {
  position: absolute; left: var(--x); top: var(--y); width: var(--w); height: var(--h);
  border: 1.5px dashed var(--frame-line); border-radius: 18px; background: var(--frame);
}
.frame > header {
  position: absolute; left: 24px; top: -15px; display: flex; gap: 10px; align-items: center;
  background: var(--bg); padding: 0 10px;
}
.frame h2 { margin: 0; font-size: 20px; letter-spacing: -0.01em; }
.chip {
  display: inline-block; font-size: 11.5px; padding: 2px 8px; border-radius: 99px;
  border: 1px solid var(--line); color: var(--muted); background: var(--card); white-space: nowrap;
}

.card {
  position: absolute; left: var(--x); top: var(--y); width: var(--w);
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow); padding: 16px 18px; cursor: auto;
  border-radius: var(--radius); backdrop-filter: blur(var(--blur)); -webkit-backdrop-filter: blur(var(--blur));
}
.card h3 { margin: 0 0 8px; font-size: 15px; }
.card p { margin: 0 0 8px; }
.card p:last-child { margin-bottom: 0; }
.card .muted, .muted { color: var(--muted); }
.card.note { background: transparent; box-shadow: none; border-style: dashed; }
.card.intro h1 { margin: 0 0 4px; font-size: 26px; letter-spacing: -0.02em; }
.card.intro .lede { font-size: 16px; margin: 10px 0 12px; }
.small { font-size: 12.5px; }
code, .mono, pre { font-variant-ligatures: none; }
code, .mono { font-family: var(--mono); font-size: 12.5px; }
pre {
  margin: 0; padding: 10px 12px; background: var(--code-bg); border: 1px solid var(--line);
  border-radius: 8px; font: 12px/1.5 var(--mono); white-space: pre-wrap; word-break: break-word;
  max-height: 260px; overflow: auto;
}

.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.stack > * + * { margin-top: 10px; }
.btn {
  border: 1px solid var(--line); background: var(--card); padding: 6px 11px; border-radius: 8px;
  cursor: pointer;
}
.btn:hover:not(:disabled) { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.person { border-color: var(--person); color: var(--person); }
.btn.person.primary { background: var(--person); color: var(--bd-color-ground); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
select, input[type="text"], textarea {
  border: 1px solid var(--line); background: var(--card); border-radius: 8px; padding: 6px 8px;
  max-width: 100%;
}
label.field { display: block; font-size: 12px; color: var(--muted); }
label.field > input, label.field > textarea, label.field > select { display: block; width: 100%; margin-top: 3px; color: var(--ink); }
textarea { resize: vertical; font: 12.5px/1.45 var(--mono); }

.badge {
  display: inline-block; font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 99px;
  vertical-align: 1px; white-space: nowrap;
}
.badge.model { background: var(--accent-soft); color: var(--accent); }
.badge.exact { background: var(--code-bg); color: var(--muted); border: 1px solid var(--line); }
.badge.person { background: var(--person-soft); color: var(--person); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.no { background: var(--no-soft); color: var(--no); }
.badge.wait { background: var(--wait-soft); color: var(--wait); }

/* ---------- demo 1: agent graph + case ---------- */
.graph svg { width: 100%; height: auto; display: block; }
.graph .node rect { fill: var(--card); stroke: var(--line); stroke-width: 1.4; }
.graph .node text { fill: var(--ink); font: 13px var(--sans); }
.graph .node .kind { fill: var(--muted); font-size: 11px; }
.graph .node.current rect { stroke: var(--accent); stroke-width: 2.4; fill: var(--accent-soft); }
.graph .node.visited rect { stroke: var(--ok); }
.graph .node.person rect { stroke-dasharray: 4 3; }
.graph .node.person.current rect { stroke: var(--person); fill: var(--person-soft); }
.graph .edge { fill: none; stroke: var(--muted); stroke-width: 1.3; }
.graph .edge.loop { stroke-dasharray: 4 4; }
.graph .edge-label { fill: var(--muted); font: 11px var(--sans); }
.graph marker path { fill: var(--muted); }
.loops { display: flex; gap: 14px; margin-top: 8px; font-size: 12.5px; }
.meter { display: inline-flex; gap: 3px; vertical-align: -1px; }
.meter i { width: 10px; height: 10px; border-radius: 3px; border: 1px solid var(--line); }
.meter i.on { background: var(--wait); border-color: var(--wait); }

.log { list-style: none; margin: 0; padding: 0; max-height: 360px; overflow: auto; }
.log li { border-top: 1px solid var(--line); padding: 8px 0; }
.log li:first-child { border-top: 0; }
.log .head { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.log .head b { font-weight: 600; }
.log .kv { font-size: 12.5px; color: var(--muted); margin-top: 3px; }
.log .kv span { color: var(--ink); }
.draft { border-left: 3px solid var(--person); padding: 6px 10px; background: var(--person-soft); border-radius: 0 8px 8px 0; font-size: 13px; }
.empty { color: var(--muted); font-style: italic; }

/* ---------- demo 2: one rule, three surfaces ---------- */
.schem svg { width: 100%; height: auto; display: block; user-select: none; }
.schem .comp rect { fill: var(--card); stroke: var(--ink); stroke-width: 1.4; cursor: pointer; }
.schem .comp.sel rect { stroke: var(--accent); stroke-width: 2.6; fill: var(--accent-soft); }
.schem .comp text { fill: var(--ink); font: 13px var(--sans); pointer-events: none; }
.schem .plane { fill: none; stroke: var(--muted); stroke-width: 1.4; stroke-dasharray: 6 4; }
.schem .plane-label { fill: var(--muted); font: 12px var(--sans); }
.schem .port { fill: var(--card); stroke: var(--ink); stroke-width: 1.6; }
.schem .port.hidden { display: none; }
.schem .wire { fill: none; stroke-width: 2.2; }
.schem .wire.ok { stroke: var(--ok); }
.schem .wire.no { stroke: var(--no); stroke-dasharray: 5 4; }
.verdict { display: flex; gap: 8px; align-items: center; margin-top: 8px; font-size: 13px; }
.same { margin-top: 10px; padding: 8px 10px; border-radius: 8px; font-size: 13px; }
.same.ok { background: var(--ok-soft); color: var(--ok); }
.same.no { background: var(--no-soft); color: var(--no); }
.toggle { display: flex; gap: 8px; align-items: center; cursor: pointer; }

/* ---------- demo 3: grants and receipts ---------- */
.grant { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-top: 1px solid var(--line); }
.grant:first-of-type { border-top: 0; }
.grant .badge { margin-top: 2px; min-width: 84px; text-align: center; }
.grant-body .btn { margin-top: 6px; padding: 3px 9px; font-size: 12.5px; }
.grant .who { font-size: 12px; color: var(--muted); }
.task-state { display: flex; gap: 4px; flex-wrap: wrap; margin: 6px 0 10px; }
.task-state span { font-size: 11.5px; padding: 2px 8px; border-radius: 99px; border: 1px solid var(--line); color: var(--muted); }
.task-state span.on { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.task-state span.done { color: var(--ok); border-color: var(--ok); }
.actions h4 { margin: 12px 0 6px; font-size: 12.5px; color: var(--muted); font-weight: 600; }
.actions .row { gap: 6px; }
.ledger { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.ledger th { text-align: left; color: var(--muted); font-weight: 600; padding: 4px 8px; border-bottom: 1px solid var(--line); }
.ledger td { padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.ledger td.mono { white-space: nowrap; }
.ledger-wrap { max-height: 220px; overflow: auto; }

/* ---------- reading mode (phones, or by choice) ---------- */
body.reading { overflow: auto; }
body.reading .viewport { position: static; overflow: visible; cursor: auto; touch-action: auto; padding: 72px 16px 40px; background-image: none; }
body.reading .world { position: static; transform: none !important; max-width: 760px; margin: 0 auto; }
body.reading .wires { display: none; }
body.reading .frame { position: relative; left: auto; top: auto; width: auto; height: auto; padding: 32px 14px 14px; margin: 34px 0; }
body.reading .card { position: relative; left: auto; top: auto; width: auto; margin: 0 0 14px; }
body.reading .card.intro { margin-top: 0; }
body.reading .frame > header { flex-wrap: wrap; right: 16px; }
body.reading .zoom-only { display: none; }
@media (max-width: 520px) {
  .bar .hint { display: none; }
  .frame h2 { font-size: 17px; }
}

/* reading view: the frames become section headings and the bar becomes a strip */
body.reading .bar { inset: 0 0 auto 0; padding: 10px 12px; background: var(--bg); border-bottom: 1px solid var(--line); flex-wrap: nowrap; }
body.reading #jump { overflow-x: auto; flex: 1 1 auto; min-width: 0; scrollbar-width: none; }
body.reading .frame { border: 0; background: none; padding: 0; margin: 40px 0 14px; scroll-margin-top: 70px; }
body.reading .frame > header { position: static; padding: 0; background: none; flex-wrap: wrap; gap: 6px; }
body.reading .card { scroll-margin-top: 70px; }

/* demo 4: looks */
.look-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.look-btn { text-align: left; border: 1px solid var(--line); background: var(--code-bg); border-radius: var(--radius); padding: 10px; cursor: pointer; }
.look-btn[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.look-btn b { display: block; }
.look-btn .sw { display: flex; gap: 4px; margin-top: 6px; }
.look-btn .sw i { width: 14px; height: 14px; border-radius: 4px; border: 1px solid var(--line); }
.kv-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.kv-table td { padding: 5px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.kv-table td:first-child { color: var(--muted); width: 42%; }
.measure { display: flex; gap: 8px; align-items: baseline; padding: 6px 0; border-top: 1px solid var(--line); font-size: 13px; }
.measure:first-of-type { border-top: 0; }

.bar, .bar button { font-size: 14px; font-family: var(--sans); }
@media (max-width: 1180px) { .bar .hint { display: none; } }