/* tokens.css — the shared design system for every FirmOS surface. Typography rule (sim BN §6):
   serif = contract-things, sans = chrome, mono = hashes/ids. Theme-aware (light/dark). */
:root {
  --bg: #faf9f7; --card: #fff; --ink: #1b1a17; --ink2: #56524b; --line: #e6e2db; --line2: #f0ede8;
  --seal: #6b4bd6; --seal-w: #efeafd; --ok: #0a7d33; --amber: #b8860b; --bad: #c0392b;
  --serif: ui-serif, Georgia, 'Times New Roman', serif;
  --sans: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', 'Cascadia Code', Menlo, monospace;
  --sh: 0 1px 2px rgba(0,0,0,.04), 0 2px 8px rgba(0,0,0,.04);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17161a; --card: #201f25; --ink: #eceaf2; --ink2: #a6a1b0; --line: #332f3a; --line2: #262330;
    --seal: #b6a1ff; --seal-w: #2a2440; --ok: #5bd68a; --amber: #e0b64d; --bad: #ff8a7a;
    --sh: 0 1px 2px rgba(0,0,0,.3), 0 2px 10px rgba(0,0,0,.35);
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.5; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 1.6rem; }
header.top { padding: 1.3rem 0 .2rem; }
.brand { font: 600 .72rem/1 var(--sans); letter-spacing: .13em; text-transform: uppercase; color: var(--seal); }
.brand b { font-family: var(--serif); font-size: 1.35rem; font-weight: 600; letter-spacing: 0; text-transform: none; color: var(--ink); display: block; margin-top: .15rem; }

nav.nav { display: flex; gap: .15rem; background: var(--line2); border: 1px solid var(--line); border-radius: 11px; padding: .22rem; margin: 1rem 0 1.3rem; flex-wrap: wrap; }
nav.nav button { font: 600 .84rem var(--sans); color: var(--ink2); background: transparent; border: 0; border-radius: 8px; padding: .45rem .85rem; cursor: pointer; }
nav.nav button.on { background: var(--card); color: var(--seal); box-shadow: var(--sh); }

h2.lead { font-family: var(--serif); font-weight: 600; font-size: 1.25rem; margin: 0 0 .1rem; text-wrap: balance; }
p.sub { color: var(--ink2); font-size: .9rem; margin: 0 0 1rem; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.1rem; margin: .7rem 0; box-shadow: var(--sh); }
.card.quiet { box-shadow: none; color: var(--ink2); }
.bcuhead { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.bcuhead b { font-family: var(--serif); font-size: 1.05rem; }
.pill { font: 600 .74rem var(--mono); border-radius: 999px; padding: .12rem .6rem; }
.pill.seal { color: var(--seal); background: var(--seal-w); }
.pill.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.pill.amber { color: var(--amber); background: color-mix(in srgb, var(--amber) 16%, transparent); }

.chips { margin: .6rem 0; display: flex; flex-wrap: wrap; gap: .3rem; }
.chip { font: 500 .78rem var(--sans); background: var(--seal-w); color: var(--ink); border-radius: 7px; padding: .18rem .55rem; }
.seals { border-top: 1px solid var(--line); margin-top: .5rem; padding-top: .5rem; display: grid; gap: .35rem; }
.seal { display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem; font-size: .85rem; }
.mono { font-family: var(--mono); font-size: .8rem; }
.hash { color: var(--ink2); }
.ok { color: var(--ok); font-weight: 600; }
.bad { color: var(--bad); font-weight: 700; }
.note { color: var(--ink2); font-size: .82rem; margin: 1.2rem 0 2.5rem; }