/* Banking Operations Transformation Workbench — public explainer.
   Dependency-free. System fonts only. */

:root {
  --ink: #12202f;
  --ink-2: #3a4a5c;
  --ink-3: #5f6f80;
  --paper: #f6f4ef;
  --surface: #ffffff;
  --surface-2: #eeebe3;
  --line: #d9d4c7;
  --navy: #0f2a44;
  --navy-2: #173a5c;
  --teal: #0f6e6a;
  --teal-soft: #d7ece9;
  --brass: #a8741a;
  --brass-soft: #f4e6c8;
  --red: #a23b2a;
  --red-soft: #f6dcd6;
  --green: #2f6b35;
  --green-soft: #dcebd9;
  --focus: #1f6fd1;
  --banner-bg: #f2c14e;
  --banner-ink: #1b1400;
  --shadow: 0 1px 2px rgba(18, 32, 47, .06), 0 6px 20px rgba(18, 32, 47, .06);
  --radius: 10px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8edf2;
    --ink-2: #c3ccd6;
    --ink-3: #93a1b0;
    --paper: #0d1620;
    --surface: #14202c;
    --surface-2: #1b2a38;
    --line: #2b3d4f;
    --navy: #0a1d30;
    --navy-2: #12304d;
    --teal: #4fbcb4;
    --teal-soft: #143633;
    --brass: #e0ab4c;
    --brass-soft: #3a2d14;
    --red: #e88573;
    --red-soft: #3c1d18;
    --green: #8ccf8f;
    --green-soft: #1b3320;
    --focus: #7fb2ff;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
}

a { color: var(--teal); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }

h1, h2, h3 { font-family: var(--serif); line-height: 1.2; color: var(--ink); text-wrap: balance; }
h2 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.3rem); margin: 0 0 .5rem; letter-spacing: -.01em; }
h3 { font-size: 1.2rem; margin: 0 0 .35rem; }
p { margin: 0 0 1rem; }

.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus { left: 16px; top: 44px; z-index: 100; background: var(--surface); padding: .5rem 1rem; }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Banner (CONTRACTS §8) */
.demo-banner {
  position: sticky; top: 0; z-index: 50;
  background: var(--banner-bg); color: var(--banner-ink);
  text-align: center; font: 700 .85rem/1 var(--sans); letter-spacing: .08em;
  padding: .6rem 16px;
  border-bottom: 1px solid rgba(0, 0, 0, .15);
}

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

/* Header */
.site-header { background: var(--navy); color: #fff; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-top: .9rem; padding-bottom: .9rem; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: .6rem; color: #fff; text-decoration: none; font-weight: 650; letter-spacing: .01em; }
.brand svg { flex: none; }
.nav { display: flex; gap: 1.1rem; flex-wrap: wrap; align-items: center; font-size: .92rem; }
.nav a { color: #d5e2ee; text-decoration: none; }
.nav a:hover { color: #fff; text-decoration: underline; }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .7rem 1.15rem; border-radius: 8px; border: 1px solid transparent;
  font: 600 .98rem/1.1 var(--sans); text-decoration: none; cursor: pointer;
}
.btn-primary { background: var(--brass); color: #fff; }
.btn-primary:hover { background: #8f6213; }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .45); }
.btn-ghost:hover { background: rgba(255, 255, 255, .08); }
.btn-sm { padding: .45rem .8rem; font-size: .88rem; }
@media (prefers-color-scheme: dark) { .btn-primary { color: #1b1400; } .btn-primary:hover { background: #f0c26a; } }

/* Hero */
.hero { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 70%, #1d4a5f 100%); color: #e9f0f6; padding: 4.5rem 0 4rem; position: relative; overflow: hidden; }
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .14;
  background-image: linear-gradient(rgba(255,255,255,.35) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.35) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 80% 30%, #000 0%, transparent 65%);
}
.hero .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: 1.25fr 1fr; gap: 3rem; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; font-weight: 700; color: var(--brass); margin: 0 0 .8rem; }
.hero .eyebrow { color: #f2c14e; }
.hero h1 { color: #fff; font-size: clamp(2.1rem, 1.3rem + 3.4vw, 3.6rem); margin: 0 0 1.1rem; letter-spacing: -.015em; }
.hero h1 span { display: block; }
.hero h1 span:nth-child(2) { color: #bfe3df; }
.hero h1 span:nth-child(3) { color: #f2c14e; }
.hero .lede { font-size: 1.13rem; color: #cbd8e4; max-width: 38rem; }
.hero-ctas { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.6rem; }
.hero-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius); overflow: hidden; }
.hero-facts div { background: rgba(10, 29, 48, .72); padding: 1.1rem 1.2rem; }
.hero-facts b { display: block; font: 600 2rem/1 var(--serif); color: #fff; }
.hero-facts span { font-size: .88rem; color: #b6c7d6; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; gap: 2rem; } .hero { padding: 3rem 0; } }

/* Sections */
section.block { padding: 4.2rem 0; border-bottom: 1px solid var(--line); }
section.block.alt { background: var(--surface-2); }
.section-head { max-width: 46rem; margin-bottom: 2rem; }
.section-head p { color: var(--ink-2); font-size: 1.05rem; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem 1.3rem; box-shadow: var(--shadow); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* Lifecycle */
.lifecycle { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; counter-reset: step; }
.lifecycle li { counter-increment: step; position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.1rem 1rem; box-shadow: var(--shadow); }
.lifecycle li::before { content: counter(step, decimal-leading-zero); display: block; font: 600 .8rem/1 var(--mono); color: var(--teal); margin-bottom: .55rem; letter-spacing: .05em; }
.lifecycle li p { margin: 0; color: var(--ink-2); font-size: .94rem; }
.lifecycle .phase { display: inline-block; font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; font-weight: 700; color: var(--ink-3); margin-top: .7rem; }
.loop-note { margin-top: 1rem; color: var(--ink-3); font-size: .92rem; display: flex; gap: .5rem; align-items: center; }
@media (max-width: 900px) { .lifecycle { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .lifecycle { grid-template-columns: 1fr; } }

/* Inputs / outputs */
.io { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1.2rem; align-items: stretch; }
.io .arrow { display: flex; align-items: center; justify-content: center; color: var(--teal); }
.chips { display: flex; flex-wrap: wrap; gap: .45rem; list-style: none; padding: 0; margin: 0; }
.chips li { background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: .28rem .7rem; font-size: .88rem; }
.io .out .chips li { background: var(--teal-soft); border-color: transparent; }
@media (max-width: 860px) { .io { grid-template-columns: 1fr; } .io .arrow svg { transform: rotate(90deg); } }

/* Confidence */
.conf-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: .9rem; }
.conf { border-left: 5px solid var(--c); background: var(--surface); border-radius: 8px; padding: .9rem 1rem; border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.conf h3 { font-family: var(--sans); font-size: 1rem; display: flex; align-items: center; gap: .5rem; }
.conf p { margin: 0; font-size: .9rem; color: var(--ink-2); }
.conf .tier { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); font-weight: 700; }
.c-observed { --c: #2f6b35; } .c-documented { --c: #0f6e6a; } .c-owner { --c: #1f5fa8; }
.c-inferred { --c: #a8741a; } .c-assumed { --c: #8a6a9e; } .c-conflicting { --c: #a23b2a; } .c-unresolved { --c: #6b7785; }
.tag { display: inline-block; font: 700 .7rem/1 var(--sans); letter-spacing: .06em; text-transform: uppercase; padding: .32rem .5rem; border-radius: 4px; background: var(--c, var(--ink-3)); color: #fff; white-space: nowrap; }

/* Evidence example */
.evidence-flow { display: grid; grid-template-columns: 1fr 1.25fr 1fr; gap: 1rem; align-items: start; }
@media (max-width: 960px) { .evidence-flow { grid-template-columns: 1fr; } }
.doc { font-size: .92rem; }
.doc .meta { font: 600 .75rem/1.4 var(--mono); color: var(--ink-3); margin-bottom: .6rem; }
.doc blockquote { margin: 0; padding: .8rem 1rem; background: var(--surface-2); border-radius: 6px; font-family: var(--serif); font-size: 1rem; line-height: 1.55; }
.doc blockquote p { margin: 0 0 .5rem; } .doc blockquote p:last-child { margin: 0; }
.doc mark { background: var(--brass-soft); color: inherit; padding: 0 .15em; border-radius: 2px; }
.stmts { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.stmts li { background: var(--surface); border: 1px dashed var(--line); border-radius: 8px; padding: .7rem .8rem; font-size: .92rem; }
.stmts .row { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: .45rem; align-items: center; }
.pending { font: 700 .7rem/1 var(--sans); text-transform: uppercase; letter-spacing: .06em; padding: .3rem .5rem; border-radius: 4px; border: 1px solid var(--brass); color: var(--brass); background: var(--brass-soft); }
.inv dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: .35rem .8rem; font-size: .9rem; }
.inv dt { color: var(--ink-3); font-weight: 600; }
.inv dd { margin: 0; }
.col-label { font: 700 .74rem/1 var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); margin: 0 0 .6rem; }

/* Landscape */
.domains { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1rem; }
@media (max-width: 1060px) { .domains { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 700px) { .domains { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 460px) { .domains { grid-template-columns: 1fr; } }
.domain h3 { font-family: var(--sans); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); border-bottom: 2px solid var(--d); padding-bottom: .45rem; margin-bottom: .7rem; }
.domain ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.flow { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: .7rem .8rem; box-shadow: var(--shadow); }
.flow .id { font: 600 .75rem/1 var(--mono); color: var(--ink-3); }
.flow .name { display: block; font-weight: 600; margin: .3rem 0 .4rem; line-height: 1.3; }
.flow.exec { border-color: var(--teal); box-shadow: inset 4px 0 0 var(--teal), var(--shadow); }
.badge-exec { font: 700 .68rem/1 var(--sans); text-transform: uppercase; letter-spacing: .06em; color: #fff; background: var(--teal); padding: .28rem .45rem; border-radius: 4px; }
.badge-view { font: 600 .68rem/1 var(--sans); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); border: 1px solid var(--line); padding: .26rem .45rem; border-radius: 4px; }
@media (prefers-color-scheme: dark) { .badge-exec { color: #08201e; } }
.d-customer { --d: #1f5fa8; } .d-lending { --d: #a8741a; } .d-payments { --d: #0f6e6a; } .d-fincrime { --d: #a23b2a; } .d-enterprise { --d: #6b5a8e; }
.legend { display: flex; gap: 1.2rem; flex-wrap: wrap; font-size: .9rem; color: var(--ink-2); margin-top: 1.2rem; align-items: center; }

/* Treatments */
.treatments { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; list-style: none; margin: 0; padding: 0; }
.treatments li { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: .8rem .9rem; font-size: .9rem; color: var(--ink-2); }
.treatments b { display: block; color: var(--ink); font-size: .98rem; margin-bottom: .2rem; }
@media (max-width: 900px) { .treatments { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 480px) { .treatments { grid-template-columns: 1fr; } }
.dims { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-bottom: 1.6rem; }
@media (max-width: 700px) { .dims { grid-template-columns: 1fr; } }
.dims ul { margin: .4rem 0 0; padding-left: 1.1rem; color: var(--ink-2); font-size: .94rem; }

/* Calculator */
.calc { display: grid; grid-template-columns: 1.35fr 1fr; gap: 1.4rem; align-items: start; }
@media (max-width: 920px) { .calc { grid-template-columns: 1fr; } }
.calc fieldset { border: 1px solid var(--line); border-radius: var(--radius); padding: .9rem 1.1rem 1rem; margin: 0 0 1rem; background: var(--surface); }
.calc legend { font-weight: 700; padding: 0 .4rem; font-size: .95rem; }
.calc legend small { font-weight: 500; color: var(--ink-3); }
.slider { display: grid; grid-template-columns: minmax(0, 11rem) 1fr 2rem; gap: .8rem; align-items: center; padding: .3rem 0; }
.slider label { font-size: .92rem; }
.slider output { font: 700 1rem/1 var(--mono); text-align: right; }
.slider input[type=range] { width: 100%; accent-color: var(--teal); height: 1.6rem; }
.constraint input[type=range] { accent-color: var(--brass); }
@media (max-width: 480px) { .slider { grid-template-columns: 1fr 2rem; } .slider input { grid-column: 1 / -1; grid-row: 2; } }
.presets { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; align-items: center; }
.presets span { font-size: .88rem; color: var(--ink-3); margin-right: .2rem; }
.chip-btn { font: 600 .85rem/1 var(--sans); padding: .5rem .75rem; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.chip-btn:hover { border-color: var(--teal); }
.chip-btn[aria-pressed=true] { background: var(--teal); color: #fff; border-color: var(--teal); }
@media (prefers-color-scheme: dark) { .chip-btn[aria-pressed=true] { color: #08201e; } }
.result { position: sticky; top: 4rem; }
.score-ring { display: flex; align-items: center; gap: 1.2rem; margin-bottom: 1rem; }
.score-ring svg { flex: none; }
.score-num { font: 600 2.6rem/1 var(--serif); }
.treatment-out { font: 600 1.35rem/1.2 var(--serif); color: var(--teal); margin: .2rem 0 0; }
.subscores { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; margin: 1rem 0; font-size: .9rem; }
.subscores div { background: var(--surface-2); border-radius: 6px; padding: .55rem .7rem; }
.subscores b { font-family: var(--mono); font-size: 1.05rem; }
.rationale { font-size: .92rem; color: var(--ink-2); padding-left: 1.1rem; margin: 0 0 1rem; }
.advisory { font-size: .85rem; color: var(--ink-2); background: var(--brass-soft); border-radius: 6px; padding: .6rem .8rem; margin: 0; }
.formula { font: .82rem/1.5 var(--mono); background: var(--surface-2); border-radius: 6px; padding: .6rem .8rem; margin: 0 0 1rem; overflow-x: auto; color: var(--ink-2); }

/* Comparison */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
@media (max-width: 800px) { .compare { grid-template-columns: 1fr; } }
.compare .card h3 { display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; counter-reset: s; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 1.7rem 1fr; gap: .6rem; font-size: .93rem; align-items: start; }
.steps li::before { content: counter(s); font: 700 .78rem/1.7rem var(--mono); text-align: center; border-radius: 50%; background: var(--surface-2); color: var(--ink-2); }
.steps .who { display: block; font-size: .78rem; color: var(--ink-3); }
.issue { color: var(--red); font-weight: 600; font-size: .8rem; }
.gain { color: var(--green); font-weight: 600; font-size: .8rem; }
.current { border-top: 4px solid var(--red); }
.target { border-top: 4px solid var(--teal); }
.metrics { width: 100%; border-collapse: collapse; margin-top: 1.4rem; font-size: .93rem; background: var(--surface); border-radius: var(--radius); overflow: hidden; }
.metrics caption { text-align: left; font-weight: 700; padding-bottom: .5rem; }
.metrics th, .metrics td { padding: .6rem .8rem; border-bottom: 1px solid var(--line); text-align: left; }
.metrics thead th { background: var(--surface-2); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); }
.table-scroll { overflow-x: auto; }
.note { font-size: .85rem; color: var(--ink-3); }

/* Roles */
.role h3 { display: flex; gap: .6rem; align-items: center; }
.role .ico { width: 34px; height: 34px; border-radius: 8px; background: var(--teal-soft); color: var(--teal); display: grid; place-items: center; flex: none; }
.role ul { margin: .4rem 0 0; padding-left: 1.1rem; font-size: .93rem; color: var(--ink-2); }
.role .does { font-size: .9rem; color: var(--ink-3); margin: 0; }

/* Guardrails */
.guard { display: grid; grid-template-columns: 2.2rem 1fr; gap: .8rem; }
.guard .ico { color: var(--brass); }
.guard p { margin: 0; color: var(--ink-2); font-size: .93rem; }

/* Video */
.video-wrap { display: grid; grid-template-columns: 1.6fr 1fr; gap: 1.6rem; align-items: start; }
@media (max-width: 900px) { .video-wrap { grid-template-columns: 1fr; } }
.video-frame { background: #000; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 16 / 9; }
.video-frame video { width: 100%; height: 100%; display: block; }
.scene-list { margin: 0; padding-left: 1.2rem; color: var(--ink-2); font-size: .93rem; }
.scene-list li { margin-bottom: .3rem; }

/* CTA + footer */
.cta { background: var(--navy); color: #dbe6f0; padding: 4rem 0; text-align: center; }
.cta h2 { color: #fff; }
.cta p { max-width: 40rem; margin: 0 auto 1.4rem; }
.cta .hero-ctas { justify-content: center; }
.site-footer { background: #0a1d30; color: #9fb3c6; font-size: .88rem; padding: 2rem 0; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.site-footer a { color: #cfe0ee; }

/* Transcript page */
.transcript { max-width: 46rem; margin: 0 auto; padding: 3rem 24px 4rem; }
.transcript h1 { font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.4rem); margin-top: 0; }
.transcript section { border-top: 1px solid var(--line); padding: 1.2rem 0 .4rem; }
.transcript h2 { font-size: 1.2rem; display: flex; gap: .7rem; align-items: baseline; }
.transcript time { font: 600 .82rem/1 var(--mono); color: var(--teal); }
.transcript .on-screen { font-size: .9rem; color: var(--ink-3); }
@media (max-width: 600px) { .transcript { padding: 2rem 16px 3rem; } }

@media print {
  .demo-banner { position: static; }
  .site-header .nav, .hero-ctas, .cta, video { display: none; }
  section.block { break-inside: avoid; }
}
@media (max-width: 640px) { .nav a:not(.btn) { display: none; } }