/* ════════════════════════════════════════════════════════════════
   BIAN Platform docs — "private-bank mission control"
   Dark ink-navy, ledger gold accent, grotesk display + mono data.
   ════════════════════════════════════════════════════════════════ */
:root {
  --bg:        #0c1220;
  --bg-2:      #101a2e;
  --panel:     #16223a;
  --panel-2:   #1c2b48;
  --line:      #27375a;
  --ink:       #e9edf5;
  --ink-dim:   #9aa7c0;
  --ink-faint: #66738f;
  --gold:      #d9a93d;
  --gold-soft: #f0c869;
  --green:     #3fbf8f;
  --red:       #e0604f;
  --blue:      #5b8dd9;
  --mono: "Spline Sans Mono", ui-monospace, Menlo, monospace;
  --sans: "Archivo", -apple-system, "Helvetica Neue", sans-serif;
  --maxw: 1140px;
  --r: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 16.5px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body::before { /* ledger grid */
  content: ""; position: fixed; inset: 0; pointer-events: none; opacity: .35; z-index: 0;
  background-image:
    linear-gradient(rgba(91,141,217,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91,141,217,.05) 1px, transparent 1px);
  background-size: 44px 44px;
}
main, header, footer { position: relative; z-index: 1; }
a { color: var(--gold-soft); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .85em; background: var(--panel); border: 1px solid var(--line); border-radius: 5px; padding: .1em .4em; color: var(--gold-soft); }
h2 { font-size: clamp(1.7rem, 4.5vw, 2.6rem); font-weight: 800; letter-spacing: -.02em; margin: 0 0 .9rem; display: flex; gap: .8rem; align-items: baseline; }
h2 .no { font-family: var(--mono); font-size: .85rem; color: var(--gold); border: 1px solid var(--gold); border-radius: 6px; padding: .12rem .45rem; }
h3 { font-weight: 700; font-size: 1.25rem; margin: 0 0 .6rem; }
h3 small { color: var(--ink-faint); font-weight: 500; font-size: .75em; margin-left: .5rem; }
.intro { color: var(--ink-dim); max-width: 62ch; margin: 0 0 1.8rem; }

/* top bar */
.top {
  position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 1.2rem;
  padding: .75rem clamp(1rem, 4vw, 2.2rem);
  background: rgba(12,18,32,.86); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 900; letter-spacing: .14em; font-size: .95rem; color: var(--ink); }
.brand-tick { color: var(--gold); }
.nav { display: flex; gap: clamp(.6rem, 1.6vw, 1.3rem); flex-wrap: wrap; margin-left: auto; }
.nav a { font-family: var(--mono); font-size: .76rem; color: var(--ink-dim); }
.nav a:hover { color: var(--gold-soft); text-decoration: none; }
.gh { font-family: var(--mono); font-size: .76rem; border: 1px solid var(--line); border-radius: 7px; padding: .3rem .7rem; color: var(--ink); }
.gh:hover { border-color: var(--gold); text-decoration: none; }
@media (max-width: 900px) { .nav { display: none; } }

/* hero */
.hero { max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem, 8vw, 5.5rem) clamp(1rem, 4vw, 2.2rem) 3rem; }
.hero-eyebrow { font-family: var(--mono); font-size: .76rem; letter-spacing: .18em; color: var(--gold); margin: 0 0 1rem; }
.hero h1 { font-size: clamp(2.6rem, 8vw, 5.2rem); font-weight: 900; line-height: 1.02; letter-spacing: -.03em; margin: 0 0 1.2rem; }
.accent { color: var(--gold); }
.hero-sub { max-width: 56ch; color: var(--ink-dim); font-size: clamp(1rem, 2.2vw, 1.18rem); margin: 0 0 2.4rem; }
.statline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.stat { background: var(--panel); padding: 1.1rem 1rem; }
.stat b { display: block; font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 900; color: var(--gold-soft); font-variant-numeric: tabular-nums; }
.stat span { font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); line-height: 1.4; }
@media (max-width: 760px) { .statline { grid-template-columns: repeat(2, 1fr); } }

/* bands */
.band { max-width: var(--maxw); margin: 0 auto; padding: clamp(2.6rem, 6vw, 4.2rem) clamp(1rem, 4vw, 2.2rem); border-top: 1px solid var(--line); }
.band-alt { background: linear-gradient(180deg, var(--bg-2), transparent); }

/* journey */
.journey { display: grid; grid-template-columns: 300px 1fr; gap: 1.2rem; align-items: start; }
@media (max-width: 820px) { .journey { grid-template-columns: 1fr; } }
.journey-steps { display: flex; flex-direction: column; gap: .45rem; }
.jstep {
  text-align: left; cursor: pointer; font-family: var(--mono); font-size: .82rem;
  background: var(--panel); color: var(--ink-dim); border: 1px solid var(--line);
  border-radius: 9px; padding: .7rem .9rem; transition: .15s;
}
.jstep:hover { border-color: var(--gold); color: var(--ink); }
.jstep.active { background: var(--panel-2); border-color: var(--gold); color: var(--gold-soft); }
.jstep .jno { color: var(--gold); margin-right: .5rem; }
.journey-detail { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 1.4rem 1.5rem; min-height: 220px; position: sticky; top: 86px; }
.journey-detail h4 { margin: 0 0 .6rem; font-size: 1.15rem; color: var(--gold-soft); }
.journey-detail p { margin: 0 0 .8rem; color: var(--ink-dim); font-size: .95rem; }
.journey-detail code { font-size: .8em; }

/* architecture */
.arch { display: grid; grid-template-columns: 1.15fr .85fr; gap: 1.2rem; align-items: start; }
@media (max-width: 880px) { .arch { grid-template-columns: 1fr; } }
.arch-diagram { display: flex; flex-direction: column; gap: .5rem; }
.arch-layer {
  cursor: pointer; width: 100%; text-align: center; font-family: var(--mono); font-size: .85rem;
  background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 10px;
  padding: .85rem .8rem; transition: .15s;
}
.arch-layer small { display: block; color: var(--ink-faint); font-size: .72rem; margin-top: .2rem; }
.arch-layer:hover, .arch-layer.active { border-color: var(--gold); background: var(--panel-2); }
.arch-ns-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: .4rem; }
.arch-layer.ns { font-size: .62rem; padding: .55rem .25rem; }
.arch-layer.ns small { font-size: .8rem; color: var(--gold-soft); }
@media (max-width: 680px) { .arch-ns-row { grid-template-columns: repeat(2, 1fr); } }
.arch-detail { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 1.3rem 1.4rem; min-height: 180px; position: sticky; top: 86px; }
.arch-detail h4 { margin: 0 0 .5rem; color: var(--gold-soft); }
.arch-detail p, .arch-detail li { color: var(--ink-dim); font-size: .93rem; }
.arch-detail ul { padding-left: 1.1rem; margin: .4rem 0; }
.netflix { margin-top: 2.2rem; }
.netflix-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: .5rem; }
.netflix-grid div { font-family: var(--mono); font-size: .78rem; color: var(--ink-dim); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: .6rem .8rem; }
.netflix-grid span { color: var(--red); }

/* explorer */
.explorer-controls { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; margin-bottom: .6rem; }
.explorer-controls input[type="search"], .explorer-controls select {
  background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 8px;
  font-family: var(--mono); font-size: .82rem; padding: .6rem .8rem;
}
.explorer-controls input[type="search"] { flex: 1; min-width: 240px; }
.ex-deep { font-family: var(--mono); font-size: .78rem; color: var(--ink-dim); display: inline-flex; align-items: center; gap: .4rem; }
.ex-deep input { accent-color: var(--gold); }
.ex-count { font-family: var(--mono); font-size: .74rem; color: var(--ink-faint); margin: 0 0 .6rem; }
.ex-table-wrap { border: 1px solid var(--line); border-radius: var(--r); overflow: auto; max-height: 540px; }
.ex-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.ex-table th {
  position: sticky; top: 0; background: var(--panel-2); color: var(--gold-soft);
  font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .06em;
  text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--line);
}
.ex-table td { padding: .55rem .9rem; border-bottom: 1px solid rgba(39,55,90,.5); vertical-align: top; }
.ex-table tbody tr:hover { background: var(--panel); }
.ex-table .sd-name { font-weight: 600; color: var(--ink); }
.ex-table .dim { color: var(--ink-faint); font-size: .78rem; font-family: var(--mono); }
.badge-deep { font-family: var(--mono); font-size: .62rem; color: #0c1220; background: var(--gold); border-radius: 4px; padding: .1rem .35rem; margin-left: .45rem; vertical-align: middle; }
.repo-link { font-family: var(--mono); font-size: .74rem; }

/* deep grid */
.deep-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 1rem; }
.deep-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 1.2rem 1.3rem; }
.deep-card h4 { margin: 0 0 .2rem; font-size: 1.1rem; }
.deep-card .cr { font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); margin: 0 0 .7rem; }
.deep-card ul { margin: 0 0 .9rem; padding-left: 1.05rem; color: var(--ink-dim); font-size: .87rem; }
.deep-card li { margin-bottom: .3rem; }
.deep-card pre { margin: 0; }

/* code blocks */
pre {
  position: relative; background: #0a0f1b; border: 1px solid var(--line); border-left: 3px solid var(--gold);
  border-radius: 9px; padding: .85rem 1rem; overflow-x: auto;
  font-family: var(--mono); font-size: .74rem; line-height: 1.55; color: #d6deee;
}
pre code { background: transparent; border: 0; padding: 0; color: inherit; font-size: 1em; }
.copy-btn {
  position: absolute; top: .45rem; right: .45rem; cursor: pointer;
  font-family: var(--mono); font-size: .64rem; color: var(--ink-dim);
  background: var(--panel); border: 1px solid var(--line); border-radius: 5px; padding: .2rem .5rem;
}
.copy-btn:hover { color: var(--gold-soft); border-color: var(--gold); }
.copy-btn.ok { color: #0c1220; background: var(--gold); border-color: var(--gold); }

/* flows */
.flow { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 1.4rem 1.5rem; margin-bottom: 1.2rem; }
.flow p { color: var(--ink-dim); font-size: .92rem; margin: .2rem 0 1rem; }
.btn {
  cursor: pointer; font-family: var(--mono); font-size: .8rem; font-weight: 600;
  background: var(--gold); color: #0c1220; border: 1px solid var(--gold); border-radius: 8px; padding: .55rem 1rem;
}
.btn:hover { background: var(--gold-soft); }
.btn.ghost { background: transparent; color: var(--ink-dim); border-color: var(--line); }
.btn.ghost:hover { color: var(--ink); border-color: var(--ink-dim); }
.saga-controls { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: 1rem; }
.saga-controls select { background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); border-radius: 8px; font-family: var(--mono); font-size: .8rem; padding: .5rem .7rem; }
.saga-track { display: flex; gap: .5rem; flex-wrap: wrap; }
.saga-node {
  flex: 1; min-width: 130px; text-align: center; font-family: var(--mono); font-size: .72rem;
  border: 1px dashed var(--line); border-radius: 9px; padding: .8rem .5rem; color: var(--ink-faint);
  transition: .2s;
}
.saga-node b { display: block; font-size: .82rem; margin-bottom: .25rem; }
.saga-node.on { border-style: solid; border-color: var(--blue); color: var(--ink); background: rgba(91,141,217,.08); }
.saga-node.good { border-color: var(--green); color: var(--green); background: rgba(63,191,143,.08); }
.saga-node.bad { border-color: var(--red); color: var(--red); background: rgba(224,96,79,.08); }
.saga-msg { font-family: var(--mono); font-size: .78rem; margin-top: .9rem; color: var(--ink-dim); min-height: 1.4em; }

.fraud-calc, .kyc-calc { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; align-items: start; }
@media (max-width: 720px) { .fraud-calc, .kyc-calc { grid-template-columns: 1fr; } }
.fraud-inputs label, .kyc-inputs label { display: block; font-size: .88rem; color: var(--ink-dim); margin-bottom: .9rem; }
.fraud-inputs input[type="number"] {
  display: block; width: 100%; margin-top: .35rem; background: var(--panel-2); color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px; font-family: var(--mono); font-size: .95rem; padding: .55rem .7rem;
}
.fraud-inputs small { display: block; font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); margin-top: .3rem; }
.fr-check { display: flex !important; gap: .5rem; align-items: flex-start; cursor: pointer; }
.fr-check input { accent-color: var(--gold); margin-top: .2rem; }
.fraud-result, .kyc-result { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--r); padding: 1.1rem 1.2rem; font-family: var(--mono); font-size: .82rem; }
.score-big { font-size: 2.4rem; font-weight: 900; font-variant-numeric: tabular-nums; }
.score-big.alert { color: var(--red); }
.score-big.clean { color: var(--green); }
.rule-line { display: flex; justify-content: space-between; border-bottom: 1px dashed var(--line); padding: .3rem 0; color: var(--ink-dim); }
.rule-line.hit { color: var(--gold-soft); }
.verdict { margin-top: .7rem; font-weight: 600; }
.kyc-outcome { font-size: 1.5rem; font-weight: 900; margin-bottom: .5rem; }
.kyc-outcome.approved { color: var(--green); }
.kyc-outcome.rejected { color: var(--red); }
.kyc-outcome.referred { color: var(--gold-soft); }

/* timeline */
.timeline { display: flex; flex-direction: column; gap: .9rem; }
.phase { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 1.1rem 1.3rem; }
.phase h4 { margin: 0 0 .5rem; display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.phase ul { margin: 0; padding-left: 1.1rem; color: var(--ink-dim); font-size: .88rem; columns: 2; column-gap: 2rem; }
@media (max-width: 720px) { .phase ul { columns: 1; } }
.phase li { margin-bottom: .3rem; break-inside: avoid; }
.pill { font-family: var(--mono); font-size: .62rem; font-weight: 600; border-radius: 5px; padding: .12rem .45rem; vertical-align: middle; }
.pill.run { background: rgba(63,191,143,.15); color: var(--green); border: 1px solid var(--green); }
.pill.staged { background: rgba(217,169,61,.12); color: var(--gold-soft); border: 1px solid var(--gold); }
.pill.planned { background: rgba(154,167,192,.1); color: var(--ink-dim); border: 1px solid var(--line); }
.legend { font-size: .82rem; color: var(--ink-faint); margin-top: 1rem; }

/* run */
.run-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 760px) { .run-grid { grid-template-columns: 1fr; } }
.run-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 1.1rem 1.2rem; }
.run-card h3 { font-size: 1rem; }
.run-note { color: var(--ink-faint); font-size: .85rem; margin-top: 1.4rem; max-width: 80ch; }

/* footer */
.foot { max-width: var(--maxw); margin: 0 auto; padding: 2.6rem clamp(1rem, 4vw, 2.2rem) 3.4rem; border-top: 1px solid var(--line); color: var(--ink-dim); font-size: .85rem; }
.foot-dim { color: var(--ink-faint); font-size: .76rem; font-family: var(--mono); }

/* faq */
.faq-intro { color: var(--ink-dim); max-width: 62ch; margin: 0 0 1.4rem; }
.faq { max-width: 74ch; }
.faq details { background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--gold); border-radius: 8px; margin-bottom: .7rem; }
.faq summary { list-style: none; cursor: pointer; position: relative; padding: .95rem 2.6rem .95rem 1.1rem; font-weight: 600; font-size: 1.05rem; color: var(--ink); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 1.1rem; top: 50%; transform: translateY(-50%); font-family: var(--mono); color: var(--gold); font-size: 1.3rem; }
.faq details[open] summary::after { content: "\2013"; }
.faq .a { padding: 0 1.1rem 1.1rem; color: var(--ink-dim); max-width: 72ch; }
.faq .a strong { color: var(--ink); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }