/* Riparian — site stylesheet
   Layout concept: an editorial ledger. A disciplined 12-column grid, hairline
   rules, generous margins, one slate-blue signal per view. Single committed
   light look with an espresso closing chapter. */

@font-face { font-family: "Merriweather"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/merriweather-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Merriweather"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/merriweather-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Merriweather"; font-style: italic; font-weight: 400; font-display: swap; src: url("fonts/merriweather-latin-400-italic.woff2") format("woff2"); }
/* Display face. Quair (Alias, Gareth Hague) is the intended face; it is a licensed
   font, so this build uses DM Serif Display as the nearest open alternative
   (Scotch-roman roots, high contrast, sharp triangular serifs). To switch to Quair:
   add its woff2 files here, declare them as "Quair" and change --font-display. */
@font-face { font-family: "DM Serif Display"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/dm-serif-display-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "DM Serif Display"; font-style: italic; font-weight: 400; font-display: swap; src: url("fonts/dm-serif-display-latin-400-italic.woff2") format("woff2"); }

:root {
  color-scheme: light;
  /* Brand palette */
  --espresso: #262121;
  --charcoal: #333335;
  --olive: #787D65;
  --gray: #DDE1E6;
  --slate: #4A5B7A;
  /* Derived tints and inks (documented in README) */
  --paper: #F4F6F8;        /* reading surface, cool-tinted */
  --paper-2: #EBEEF2;      /* quiet panel between paper and gray */
  --ink: var(--espresso);
  --ink-2: #5A5C60;        /* secondary text, 6.4:1 on paper */
  --ink-3: #7C7F85;        /* tertiary, large text / meta only */
  --rule: #C7CCD3;         /* hairlines on paper */
  --rule-strong: #A9AEB5;
  --slate-deep: #3B4A64;   /* hover */
  --slate-wash: rgba(74, 91, 122, 0.10);
  --olive-ink: #5E6350;    /* olive for small text, 5.6:1 on paper */
  --olive-wash: rgba(120, 125, 101, 0.14);
  --chart-b: #9AA1AA;      /* comparison series two */
  /* On espresso */
  --on-dark: var(--gray);
  --on-dark-2: #B9BEC6;
  --rule-dark: #46403F;
  --slate-light: #8FA3C7;  /* signal on espresso */
  --olive-light: #A8AE92;

  --font: "Merriweather", Georgia, "Times New Roman", serif;
  --font-display: "Quair", "DM Serif Display", "Merriweather", Georgia, serif;
  --measure: 62ch;
  --wrap: 1320px;
  --gutter: clamp(20px, 5vw, 80px);
  --radius: 4px;
  --t-fast: 160ms cubic-bezier(.2,.7,.2,1);
  --t-med: 320ms cubic-bezier(.2,.7,.2,1);

  /* Type scale */
  --fs-display: clamp(2.5rem, 1.1rem + 5.4vw, 5.5rem);
  --fs-h1: clamp(2.25rem, 1.2rem + 3.8vw, 4rem);
  --fs-h2: clamp(1.75rem, 1.1rem + 2.4vw, 3rem);
  --fs-h3: clamp(1.25rem, 1.05rem + .7vw, 1.625rem);
  --fs-h4: 1.125rem;
  --fs-body: 1.0625rem;
  --fs-lede: clamp(1.125rem, 1rem + .5vw, 1.375rem);
  --fs-small: .9375rem;
  --fs-meta: .8125rem;
  --fs-eyebrow: .75rem;
  --space-section: clamp(72px, 10vw, 150px);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 90px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font); font-size: var(--fs-body); line-height: 1.65;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-color: var(--rule-strong); text-underline-offset: .18em; text-decoration-thickness: 1px; transition: text-decoration-color var(--t-fast), color var(--t-fast); }
a:hover { text-decoration-color: currentColor; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.12; margin: 0; letter-spacing: -0.008em; text-wrap: balance; }
h4 { font-weight: 700; line-height: 1.4; margin: 0; text-wrap: balance; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: 1.25; letter-spacing: -0.005em; }
h4 { font-size: var(--fs-h4); }
p { margin: 0; }
p + p { margin-top: 1em; }
strong, b { font-weight: 700; }
ul, ol { margin: 0; padding: 0; }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
::selection { background: var(--slate); color: #fff; }

:focus-visible { outline: 2px solid var(--slate); outline-offset: 3px; border-radius: 2px; }
.site-dark :focus-visible, .chapter-dark :focus-visible { outline-color: var(--slate-light); }

.skip-link { position: absolute; left: 16px; top: -100px; background: var(--espresso); color: #fff; padding: 10px 16px; z-index: 100; border-radius: var(--radius); }
.skip-link:focus { top: 16px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.measure { max-width: var(--measure); }
.eyebrow { font-size: var(--fs-eyebrow); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); font-weight: 700; line-height: 1.4; margin: 0; }
.eyebrow-slate { color: var(--slate); }
.eyebrow-olive { color: var(--olive-ink); }
.lede { font-size: var(--fs-lede); line-height: 1.5; color: var(--charcoal); }
.small { font-size: var(--fs-small); }
.meta { font-size: var(--fs-meta); color: var(--ink-2); line-height: 1.5; }
.num { font-variant-numeric: tabular-nums; }
.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.signal-rule { width: 44px; height: 3px; background: var(--slate); border: 0; margin: 0 0 20px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px; border-radius: var(--radius); border: 1px solid transparent; font-size: var(--fs-small); font-weight: 700; letter-spacing: .01em; text-decoration: none; cursor: pointer; transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast); white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--slate); color: #fff; border-color: var(--slate); }
.btn-primary:hover { background: var(--slate-deep); border-color: var(--slate-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-dark { background: var(--espresso); color: var(--gray); border-color: var(--espresso); }
.btn-dark:hover { background: var(--charcoal); }
.btn-block { width: 100%; }
.btn-lg { min-height: 56px; padding: 0 28px; font-size: 1rem; }
.chapter-dark .btn-ghost { color: var(--on-dark); border-color: var(--rule-dark); }
.chapter-dark .btn-ghost:hover { border-color: var(--on-dark); }
.chapter-dark .btn-primary { background: var(--slate-light); color: var(--espresso); border-color: var(--slate-light); }
.chapter-dark .btn-primary:hover { background: #A5B6D4; border-color: #A5B6D4; }
.link-btn { background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-decoration-color: var(--rule-strong); text-underline-offset: .18em; text-decoration-thickness: 1px; }
.link-btn:hover { text-decoration-color: currentColor; }
.text-link { font-weight: 700; font-size: var(--fs-small); display: inline-flex; align-items: center; gap: 8px; text-decoration: none; border-bottom: 1px solid var(--rule-strong); padding-bottom: 2px; transition: border-color var(--t-fast); }
.text-link:hover { border-color: currentColor; }
.text-link .arrow { transition: transform var(--t-fast); }
.text-link:hover .arrow { transform: translateX(3px); }
.arrow { display: inline-block; width: 1em; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--paper) 86%, transparent); backdrop-filter: saturate(1.2) blur(10px); -webkit-backdrop-filter: saturate(1.2) blur(10px); border-bottom: 1px solid transparent; transition: border-color var(--t-med), background var(--t-med); }
.site-header.is-scrolled { border-bottom-color: var(--rule); }
.page-index .site-header:not(.is-scrolled) { background: transparent; }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 44px; height: 22px; color: var(--charcoal); flex: none; }
.brand-name { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.01em; }
.site-nav { display: flex; align-items: center; }
.nav-menu { display: flex; align-items: center; gap: 28px; }
.nav-list { display: flex; gap: 26px; list-style: none; }
.nav-link { text-decoration: none; font-size: var(--fs-small); color: var(--charcoal); padding: 6px 0; position: relative; }
.nav-link::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--slate); transform: scaleX(0); transform-origin: left; transition: transform var(--t-med); }
.nav-link:hover::after, .nav-link.is-active::after { transform: scaleX(1); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-ask { min-height: 40px; }
.nav-actions .btn-primary { min-height: 42px; }
.nav-toggle { display: none; }

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; align-items: center; gap: 10px; background: none; border: 1px solid var(--rule-strong); border-radius: var(--radius); min-height: 42px; padding: 0 14px; cursor: pointer; font-size: var(--fs-small); font-weight: 700; }
  .nav-toggle-bars { display: inline-flex; flex-direction: column; gap: 5px; width: 18px; }
  .nav-toggle-bars i { display: block; height: 1.5px; background: currentColor; transition: transform var(--t-med), opacity var(--t-med); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child { transform: translateY(3.25px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child { transform: translateY(-3.25px) rotate(-45deg); }
  .nav-menu { position: fixed; inset: 76px 0 0 0; background: var(--paper); flex-direction: column; align-items: stretch; justify-content: flex-start; padding: 24px var(--gutter) 40px; gap: 32px; overflow-y: auto; transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity var(--t-med), transform var(--t-med), visibility 0s linear var(--t-med); border-top: 1px solid var(--rule); }
  .nav-menu.is-open { opacity: 1; transform: none; visibility: visible; transition-delay: 0s; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-list li + li { border-top: 1px solid var(--rule); }
  .nav-link { display: block; font-size: 1.5rem; padding: 16px 0; }
  .nav-link::after { display: none; }
  .nav-actions { flex-direction: column; align-items: stretch; }
  .nav-actions .btn { min-height: 52px; }
}

/* Sections */
.section { padding-block: var(--space-section); }
.section-tight { padding-block: calc(var(--space-section) * .6); }
.section-head { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 32px 64px; align-items: end; margin-bottom: clamp(40px, 5vw, 72px); }
.section-head .lede { max-width: var(--measure); }
.section-head-stack { display: block; max-width: 760px; }
.section-head-stack .lede { margin-top: 20px; }
.section-head h2 { margin-top: 18px; }
@media (max-width: 860px) { .section-head { grid-template-columns: 1fr; gap: 20px; } }
.chapter-dark { background: var(--espresso); color: var(--on-dark); }
.chapter-dark .eyebrow { color: var(--on-dark-2); }
.chapter-dark .lede { color: var(--on-dark); }
.chapter-dark .meta, .chapter-dark .small-muted { color: var(--on-dark-2); }
.chapter-dark .rule { border-color: var(--rule-dark); }
.chapter-dark a { text-decoration-color: var(--rule-dark); }
.chapter-dark .signal-rule { background: var(--slate-light); }
.chapter-gray { background: var(--gray); }
.chapter-panel { background: var(--paper-2); }

/* Hero */
.hero { background: var(--gray); margin-top: -76px; padding-top: calc(76px + clamp(40px, 6vw, 96px)); padding-bottom: 0; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 24px; align-items: end; }
.hero-copy { grid-column: 1 / span 8; }
.hero-side { grid-column: 10 / span 3; align-self: end; padding-bottom: 6px; }
.hero h1 { font-size: var(--fs-display); line-height: 1.02; letter-spacing: -0.022em; margin-top: 26px; max-width: 14ch; }
.hero h1 .signal-word { color: var(--slate); }
.hero .lede { margin-top: 28px; max-width: 54ch; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 28px; margin-top: 36px; }
.hero-side-list { list-style: none; display: grid; gap: 14px; font-size: var(--fs-small); color: var(--charcoal); border-top: 1px solid var(--rule-strong); padding-top: 18px; }
.hero-side-list li { display: grid; grid-template-columns: 8px 1fr; gap: 12px; align-items: start; }
.hero-side-list li::before { content: ""; width: 6px; height: 6px; background: var(--slate); margin-top: .62em; }
.hero-side .eyebrow { margin-bottom: 14px; }

.hero-chart { position: relative; margin-top: clamp(44px, 6vw, 80px); }
.hero-chart-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 10px 24px; padding-bottom: 14px; border-bottom: 1px solid var(--rule-strong); }
.hero-chart-head .legend { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: var(--fs-meta); color: var(--ink-2); }
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.legend-swatch { width: 18px; height: 0; border-top: 2px solid var(--charcoal); display: inline-block; }
.legend-swatch.b { border-color: var(--chart-b); }
.legend-swatch.signal { border-top-width: 3px; border-color: var(--slate); }
.legend-swatch.ref { border-top-style: dashed; border-color: var(--olive); }
.hero-chart-box { position: relative; height: clamp(220px, 32vw, 400px); margin-top: 10px; }
.hero-chart-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.hc-grid line { stroke: var(--rule-strong); stroke-width: 1; vector-effect: non-scaling-stroke; opacity: .7; }
.hc-band { fill: var(--slate-wash); }
.hc-ref { stroke: var(--olive); stroke-width: 1.5; stroke-dasharray: 6 6; vector-effect: non-scaling-stroke; }
.hc-line { fill: none; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.hc-line-a { stroke: var(--charcoal); stroke-width: 2; }
.hc-line-b { stroke: var(--chart-b); stroke-width: 2; }
.hc-signal { stroke: var(--slate); stroke-width: 3.5; }
.hc-peak { fill: var(--slate); stroke: var(--gray); stroke-width: 3; vector-effect: non-scaling-stroke; }
.hc-label { position: absolute; font-size: var(--fs-meta); line-height: 1.3; color: var(--ink-2); white-space: nowrap; pointer-events: none; }
.hc-ylabel { left: 0; transform: translateY(-100%); padding-bottom: 3px; }
.hc-reflabel { right: 0; transform: translateY(-100%); padding-bottom: 4px; color: var(--olive-ink); font-weight: 700; }
.hc-endlabel { right: 0; transform: translateY(-50%); padding-left: 8px; background: var(--gray); font-weight: 700; color: var(--charcoal); }
.hc-endlabel.b { color: var(--ink-2); }
.hc-annot { position: absolute; right: calc(100% - var(--ax) + 30px); top: var(--ay); transform: translateY(-14px); width: min(300px, 38%); pointer-events: auto; }
.hc-annot-card { background: var(--paper); border-left: 3px solid var(--slate); padding: 12px 16px 14px; font-size: var(--fs-small); line-height: 1.45; box-shadow: 0 1px 0 var(--rule-strong); }
.hc-annot-card .num-big { font-size: 1.5rem; line-height: 1.1; font-weight: 700; color: var(--slate); display: block; margin-bottom: 4px; }
.hc-annot-card .annot-text { color: var(--charcoal); }
.hc-annot::after { content: ""; position: absolute; left: 100%; top: 14px; width: 30px; height: 1px; background: var(--slate); }
.hero-chart-xaxis { position: relative; height: 1.4em; margin-top: 10px; font-size: var(--fs-meta); color: var(--ink-2); font-variant-numeric: tabular-nums; }
.hero-chart-xaxis span { position: absolute; top: 0; transform: translateX(-50%); white-space: nowrap; }
.hero-chart-xaxis span:first-child { transform: none; left: 0 !important; }
.hero-chart-xaxis span:last-child { transform: translateX(-100%); left: 100% !important; }
.hero-chart-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--rule-strong); font-size: var(--fs-meta); color: var(--ink-2); }
.hc-annot-mobile { display: none; }

/* Progression strip under the chart */
.progression { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: clamp(40px, 5vw, 64px); border-top: 1px solid var(--rule-strong); }
.progression > div { padding: 24px 28px 36px 0; position: relative; }
.progression > div + div { padding-left: 28px; border-left: 1px solid var(--rule-strong); }
.progression .eyebrow { display: flex; align-items: center; gap: 10px; }
.progression .eyebrow .step-arrow { color: var(--slate); font-size: 1rem; letter-spacing: 0; }
.progression p { margin-top: 10px; font-size: var(--fs-small); color: var(--charcoal); max-width: 36ch; }
.progression .is-signal .eyebrow { color: var(--slate); }

@media (max-width: 1100px) { .hero-copy { grid-column: 1 / span 9; } .hero-side { grid-column: 10 / span 3; } }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy, .hero-side { grid-column: auto; }
  .hero-side { border-top: 0; margin-top: 8px; }
  .hero h1 { max-width: none; }
  .hc-annot { display: none; }
  .hc-annot-mobile { display: block; margin-top: 16px; }
  .hc-annot-mobile .hc-annot-card { border-left-width: 3px; }
  .progression { grid-template-columns: 1fr; }
  .progression > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule-strong); }
  .progression > div { padding: 20px 0 24px; }
}
@media (max-width: 560px) {
  .hero-chart-box { height: 220px; }
  .hc-ylabel { display: none; }
  .hc-reflabel { font-size: .75rem; right: auto; left: 0; }
  .hc-endlabel { display: none; }
  .hero-chart-xaxis span:nth-child(even) { display: none; }
}

/* Ledger list (challenges) */
.ledger { list-style: none; border-top: 1px solid var(--rule); }
.ledger-row { border-bottom: 1px solid var(--rule); }
.ledger-link { display: grid; grid-template-columns: 56px minmax(0, 6fr) minmax(0, 5fr) 40px; gap: 16px 32px; align-items: baseline; padding: 28px 0; text-decoration: none; color: inherit; transition: padding-left var(--t-med); position: relative; }
.ledger-link:hover { padding-left: 10px; }
.ledger-link::before { content: ""; position: absolute; left: 0; top: 0; bottom: -1px; width: 3px; background: var(--slate); transform: scaleY(0); transition: transform var(--t-med); }
.ledger-link:hover::before { transform: scaleY(1); }
.ledger-num { font-size: var(--fs-meta); color: var(--ink-3); font-variant-numeric: tabular-nums; letter-spacing: .06em; }
.ledger-title { font-size: var(--fs-h3); line-height: 1.25; letter-spacing: -0.005em; }
.ledger-desc { color: var(--ink-2); font-size: var(--fs-small); line-height: 1.55; }
.ledger-desc .svc { display: block; margin-top: 8px; font-size: var(--fs-meta); color: var(--olive-ink); font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.ledger-arrow { color: var(--slate); font-size: 1.25rem; justify-self: end; transition: transform var(--t-fast); }
.ledger-link:hover .ledger-arrow { transform: translateX(4px); }
@media (max-width: 800px) {
  .ledger-link { grid-template-columns: 40px minmax(0, 1fr) 28px; gap: 6px 16px; padding: 22px 0; }
  .ledger-desc { grid-column: 2; }
  .ledger-arrow { grid-row: 1; grid-column: 3; }
}

/* Services ledger (home + services page) */
.services-grid { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 48px 80px; }
.services-side { position: sticky; top: 100px; align-self: start; }
.services-side .lede { margin-top: 18px; }
.services-side .side-note { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--rule); color: var(--ink-2); font-size: var(--fs-small); max-width: 40ch; }
.service-block { padding: 36px 0 44px; border-top: 1px solid var(--rule); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 20px 48px; }
.service-block:last-child { border-bottom: 1px solid var(--rule); }
.service-block h3 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem); }
.service-block .svc-lead { color: var(--charcoal); margin-top: 12px; font-size: var(--fs-small); }
.service-block .svc-lead strong { color: var(--ink); }
.service-detail { display: grid; gap: 18px; }
.service-detail dt { font-size: var(--fs-eyebrow); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); font-weight: 700; margin-bottom: 6px; }
.service-detail dd { margin: 0; color: var(--charcoal); font-size: var(--fs-small); line-height: 1.6; }
.service-detail .example { border-left: 2px solid var(--olive); padding-left: 16px; }
.service-detail .example dt { color: var(--olive-ink); }
.service-detail ul { list-style: none; display: grid; gap: 6px; }
.service-detail ul li { padding-left: 18px; position: relative; }
.service-detail ul li::before { content: ""; position: absolute; left: 0; top: .78em; width: 10px; height: 1px; background: var(--slate); }
.service-block .svc-cta { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; }
@media (max-width: 1000px) { .services-grid { grid-template-columns: 1fr; } .services-side { position: static; } }
@media (max-width: 760px) { .service-block { grid-template-columns: 1fr; } }

/* Approach steps */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule-strong); counter-reset: step; }
.step { padding: 28px 32px 36px 0; position: relative; counter-increment: step; }
.step + .step { padding-left: 32px; border-left: 1px solid var(--rule-strong); }
.step::before { content: ""; position: absolute; left: 0; top: -1px; width: 44px; height: 3px; background: var(--rule-strong); }
.step.is-signal::before { background: var(--slate); }
.step-num { font-size: var(--fs-meta); color: var(--ink-3); letter-spacing: .08em; font-variant-numeric: tabular-nums; }
.step h3 { margin-top: 10px; font-size: 1.375rem; }
.step p { margin-top: 12px; color: var(--charcoal); font-size: var(--fs-small); }
.step .step-out { margin-top: 16px; font-size: var(--fs-meta); color: var(--olive-ink); font-weight: 700; }
.step + .step::before { left: 32px; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } .step:nth-child(3) { border-left: 0; padding-left: 0; } .step:nth-child(3)::before { left: 0; } .step:nth-child(n+3) { border-top: 1px solid var(--rule-strong); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } .step + .step { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule-strong); } .step + .step::before { left: 0; } .step { padding: 24px 0 28px; } }
.engagement { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px 80px; margin-top: clamp(48px, 6vw, 80px); padding-top: 36px; border-top: 1px solid var(--rule); }
.engagement h3 { font-size: 1.375rem; }
.engagement p { margin-top: 12px; color: var(--charcoal); font-size: var(--fs-small); }
@media (max-width: 760px) { .engagement { grid-template-columns: 1fr; } }

/* Example / demo frames */
.demo { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 32px 64px; align-items: start; }
.demo + .demo { margin-top: clamp(64px, 8vw, 120px); padding-top: clamp(48px, 6vw, 80px); border-top: 1px solid var(--rule); }
.demo-intro h3 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem); margin-top: 14px; }
.demo-intro dl { margin: 24px 0 0; display: grid; gap: 14px; }
.demo-intro dt { font-size: var(--fs-eyebrow); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); font-weight: 700; margin-bottom: 4px; }
.demo-intro dd { margin: 0; color: var(--charcoal); font-size: var(--fs-small); }
.demo-intro .demo-cta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; }
.demo-frame { background: var(--paper-2); border: 1px solid var(--rule); border-radius: var(--radius); padding: 20px 22px 18px; position: relative; min-width: 0; }
.demo-toolbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 20px; padding-bottom: 14px; border-bottom: 1px solid var(--rule); }
.demo-toolbar .demo-title { font-weight: 700; font-size: var(--fs-small); }
.demo-toolbar .demo-period { font-size: var(--fs-meta); color: var(--ink-2); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 8px; min-height: 34px; padding: 0 12px; border: 1px solid var(--rule-strong); border-radius: 999px; background: var(--paper); font-size: var(--fs-meta); cursor: pointer; transition: border-color var(--t-fast), background var(--t-fast), color var(--t-fast); }
.chip[aria-pressed="true"] { background: var(--charcoal); color: var(--paper); border-color: var(--charcoal); }
.chip .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c, var(--charcoal)); flex: none; }
.chip[aria-pressed="true"] .dot { outline: 2px solid var(--paper); outline-offset: -1px; }
.seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: var(--radius); overflow: hidden; }
.seg button { background: var(--paper); border: 0; min-height: 34px; padding: 0 12px; font-size: var(--fs-meta); cursor: pointer; }
.seg button + button { border-left: 1px solid var(--rule-strong); }
.seg button[aria-pressed="true"] { background: var(--charcoal); color: var(--paper); }
.chart-area { position: relative; margin-top: 14px; }
.chart-area svg { width: 100%; height: auto; overflow: visible; }
.chart-area text { font-family: var(--font); fill: var(--ink-2); font-size: 12px; }
.chart-area .axis line, .chart-area .grid line { stroke: var(--rule); }
.chart-area .axis path { stroke: var(--rule-strong); fill: none; }
.tooltip { position: absolute; z-index: 5; background: var(--espresso); color: var(--gray); font-size: var(--fs-meta); line-height: 1.4; padding: 8px 10px; border-radius: var(--radius); pointer-events: none; transform: translate(-50%, calc(-100% - 12px)); white-space: nowrap; opacity: 0; transition: opacity var(--t-fast); }
.tooltip.is-visible { opacity: 1; }
.tooltip strong { color: #fff; }
.demo-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 20px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--rule); font-size: var(--fs-meta); color: var(--ink-2); }
.demo-note { margin-top: 12px; font-size: var(--fs-small); color: var(--charcoal); border-left: 3px solid var(--slate); padding: 6px 0 6px 14px; }
.demo-note.olive { border-color: var(--olive); }
.demo-expand { background: none; border: 1px solid var(--rule-strong); border-radius: var(--radius); min-height: 34px; padding: 0 12px; font-size: var(--fs-meta); cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.demo-expand:hover { border-color: var(--ink); }
.demo-frame.is-expanded { position: fixed; inset: 16px; z-index: 80; overflow: auto; padding: 28px; background: var(--paper); }
.demo-frame.is-expanded .chart-area svg { max-height: calc(100vh - 220px); }
.sr-table { position: absolute; left: 0; top: 0; display: block; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.data-table-toggle { margin-left: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: var(--fs-meta); margin-top: 12px; font-variant-numeric: tabular-nums; }
.data-table th, .data-table td { text-align: right; padding: 6px 8px; border-bottom: 1px solid var(--rule); }
.data-table th:first-child, .data-table td:first-child { text-align: left; }
.table-scroll { overflow-x: auto; }
@media (max-width: 1000px) { .demo { grid-template-columns: 1fr; } }

/* Embed slot */
.embed { position: relative; background: var(--paper); border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; }
.embed-viewport { position: relative; aspect-ratio: 16 / 10; min-height: 320px; max-width: 100%; }
.embed-viewport iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.embed-state { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; padding: 32px; gap: 10px; font-size: var(--fs-small); color: var(--charcoal); background: repeating-linear-gradient(135deg, var(--paper) 0 10px, var(--paper-2) 10px 11px); }
.embed-state p { max-width: 42ch; margin: 0; }
.embed-state .eyebrow { justify-self: center; }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--rule-strong); border-top-color: var(--slate); border-radius: 50%; animation: spin .9s linear infinite; vertical-align: -3px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }
.embed-bar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px 20px; padding: 12px 16px; border-top: 1px solid var(--rule); font-size: var(--fs-meta); color: var(--ink-2); }
.embed-bar .actions { display: flex; gap: 8px; flex-wrap: wrap; }
.embed.is-expanded { position: fixed; inset: 16px; z-index: 80; display: flex; flex-direction: column; }
.embed.is-expanded .embed-viewport { flex: 1; aspect-ratio: auto; }
.embed-summary { padding: 16px 18px; border-top: 1px solid var(--rule); font-size: var(--fs-small); color: var(--charcoal); background: var(--paper-2); }
@media (max-width: 700px) { .embed-viewport { aspect-ratio: 4 / 3; min-height: 260px; } }

/* Workflow diagram */
.workflow { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; }
.workflow-col { border-top: 2px solid var(--rule-strong); padding-top: 14px; }
.workflow-col.after { border-top-color: var(--slate); }
.workflow-col .eyebrow { margin-bottom: 14px; }
.workflow-col ol { list-style: none; display: grid; gap: 0; }
.workflow-col li { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; gap: 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--rule); font-size: var(--fs-small); }
.workflow-col li .w-num { font-size: var(--fs-meta); color: var(--ink-3); font-variant-numeric: tabular-nums; }
.workflow-col li .w-time { font-size: var(--fs-meta); color: var(--ink-2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.workflow-col li.auto .w-time { color: var(--slate); font-weight: 700; }
.workflow-total { display: flex; justify-content: space-between; padding-top: 12px; font-weight: 700; font-size: var(--fs-small); }
.workflow-col.after .workflow-total span:last-child { color: var(--slate); }
@media (max-width: 620px) { .workflow { grid-template-columns: 1fr; } }

/* Statement / about */
.statement { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: 40px 96px; align-items: start; }
.statement h2 { font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.75rem); line-height: 1.2; }
.statement p { margin-top: 20px; color: var(--charcoal); }
.statement .aside-list { list-style: none; display: grid; gap: 0; border-top: 1px solid var(--rule); }
.statement .aside-list li { padding: 16px 0; border-bottom: 1px solid var(--rule); font-size: var(--fs-small); display: grid; grid-template-columns: 1fr; gap: 4px; }
.statement .aside-list b { display: block; }
.statement .aside-list span { color: var(--ink-2); }
.review-flag { margin-top: 20px; border: 1px dashed var(--olive); border-radius: var(--radius); padding: 12px 14px; font-size: var(--fs-meta); color: var(--olive-ink); }
.review-flag b { color: var(--olive-ink); }
@media (max-width: 860px) { .statement { grid-template-columns: 1fr; } }
.principles { list-style: none; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule); margin-top: clamp(48px, 6vw, 80px); }
.principles li { padding: 22px 24px 28px 0; }
.principles li + li { padding-left: 24px; border-left: 1px solid var(--rule); }
.principles h3 { font-size: 1.0625rem; font-weight: 700; letter-spacing: 0; }
.principles p { margin-top: 8px; font-size: var(--fs-meta); color: var(--ink-2); }
@media (max-width: 1000px) { .principles { grid-template-columns: repeat(3, minmax(0, 1fr)); } .principles li:nth-child(4) { border-left: 0; padding-left: 0; } .principles li:nth-child(n+4) { border-top: 1px solid var(--rule); } }
@media (max-width: 600px) { .principles { grid-template-columns: 1fr; } .principles li + li { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); } .principles li { padding: 18px 0 22px; } }

/* Questions block */
.questions { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 40px 80px; }
.questions ul { list-style: none; display: grid; }
.questions li { font-size: var(--fs-h3); line-height: 1.3; padding: 18px 0; border-bottom: 1px solid var(--rule); display: grid; grid-template-columns: 24px 1fr; gap: 16px; align-items: baseline; }
.questions li::before { content: ""; width: 14px; height: 1px; background: var(--slate); align-self: center; }
.questions li:first-child { border-top: 1px solid var(--rule); }
@media (max-width: 900px) { .questions { grid-template-columns: 1fr; } .questions li { font-size: 1.25rem; } }

/* Contact / closing chapter */
.contact-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: 48px 96px; align-items: start; }
.contact-copy h2 { font-size: var(--fs-h1); margin-top: 18px; }
.contact-copy .lede { margin-top: 24px; max-width: 46ch; }
.next-steps { list-style: none; margin-top: 40px; border-top: 1px solid var(--rule-dark); display: grid; }
.next-steps li { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--rule-dark); font-size: var(--fs-small); color: var(--on-dark); }
.next-steps li .n { color: var(--on-dark-2); font-variant-numeric: tabular-nums; font-size: var(--fs-meta); letter-spacing: .08em; padding-top: 3px; }
.next-steps li b { display: block; color: #fff; margin-bottom: 4px; }
.contact-alt { margin-top: 28px; font-size: var(--fs-small); color: var(--on-dark-2); }
.contact-alt a { color: var(--on-dark); }
.form-panel { background: var(--paper); color: var(--ink); border-radius: var(--radius); padding: clamp(24px, 3vw, 40px); }
.form-panel .eyebrow { color: var(--ink-2); }
.form-panel h3 { margin-top: 10px; font-size: 1.5rem; }
.form-panel .form-lede { margin-top: 10px; color: var(--ink-2); font-size: var(--fs-small); }
.form-tabs { display: flex; gap: 0; margin-top: 20px; border-bottom: 1px solid var(--rule); }
.form-tabs button { background: none; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; padding: 10px 14px; font-size: var(--fs-small); cursor: pointer; color: var(--ink-2); }
.form-tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--slate); font-weight: 700; }
.inquiry-form { display: grid; gap: 18px; margin-top: 22px; }
.field { display: grid; gap: 6px; }
.field label { font-size: var(--fs-meta); font-weight: 700; color: var(--charcoal); letter-spacing: .02em; }
.field .optional { font-weight: 400; color: var(--ink-3); margin-left: 4px; }
.field input, .field textarea, .field select { font: inherit; font-size: 1rem; color: var(--ink); background: #fff; border: 1px solid var(--rule-strong); border-radius: var(--radius); padding: 12px 14px; width: 100%; transition: border-color var(--t-fast), box-shadow var(--t-fast); }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--slate); box-shadow: 0 0 0 3px var(--slate-wash); }
.field textarea { resize: vertical; min-height: 96px; }
.field.is-invalid input, .field.is-invalid textarea { border-color: #8E3B36; }
.field-error { font-size: var(--fs-meta); color: #8E3B36; display: none; }
.field.is-invalid .field-error { display: block; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { font-size: var(--fs-small); line-height: 1.5; border-radius: var(--radius); padding: 0; }
.form-status:not(:empty) { padding: 12px 14px; }
.form-status.is-error { background: #F6E9E8; color: #6E2B27; border-left: 3px solid #8E3B36; }
.form-status.is-success { background: var(--olive-wash); color: var(--olive-ink); border-left: 3px solid var(--olive); }
.form-alt { font-size: var(--fs-meta); color: var(--ink-2); text-align: center; }
.form-success { display: grid; gap: 14px; padding: 8px 0; }
.form-success h3 { font-size: 1.5rem; }
.form-success ol { padding-left: 20px; display: grid; gap: 8px; font-size: var(--fs-small); color: var(--charcoal); }
.form-success .meta { margin-top: 4px; }
.btn[disabled] { opacity: .6; cursor: progress; }
@media (max-width: 960px) { .contact-grid { grid-template-columns: 1fr; } }

/* Drawer */
.drawer-backdrop { position: fixed; inset: 0; background: rgba(38, 33, 33, .55); z-index: 90; opacity: 0; transition: opacity var(--t-med); }
.drawer-backdrop.is-open { opacity: 1; }
.drawer { position: fixed; top: 0; right: 0; bottom: 0; width: min(520px, 100%); background: var(--paper); color: var(--ink); z-index: 95; display: flex; flex-direction: column; transform: translateX(100%); transition: transform var(--t-med); box-shadow: -1px 0 0 var(--rule); padding-top: env(safe-area-inset-top, 0px); }
.drawer.is-open { transform: none; }
.drawer-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; padding: 24px 28px 18px; border-bottom: 1px solid var(--rule); }
.drawer-title { font-size: 1.625rem; margin-top: 6px; }
.drawer-close { background: none; border: 1px solid var(--rule-strong); border-radius: 50%; width: 40px; height: 40px; font-size: 1.5rem; line-height: 1; cursor: pointer; flex: none; display: grid; place-items: center; }
.drawer-close:hover { border-color: var(--ink); }
.drawer-body { padding: 20px 28px calc(28px + env(safe-area-inset-bottom, 0px)); overflow-y: auto; flex: 1; }
.drawer-lede { color: var(--charcoal); font-size: var(--fs-small); }
.drawer-note { margin-top: 20px; padding: 12px 14px; background: var(--paper-2); border-radius: var(--radius); font-size: var(--fs-meta); color: var(--ink-2); }
.scheduler-frame { margin-top: 16px; min-height: 560px; }
.scheduler-frame iframe { width: 100%; height: 100%; min-height: 560px; border: 0; }
.scheduler-state { margin-top: 16px; font-size: var(--fs-small); }
.scheduler-error { padding: 12px 14px; background: #F6E9E8; color: #6E2B27; border-left: 3px solid #8E3B36; }
.inquiry-compact { margin-top: 18px; }
body.drawer-open { overflow: hidden; }

/* Mobile bar */
.mobile-bar { display: none; }
@media (max-width: 760px) {
  .mobile-bar { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: center; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; padding: 10px var(--gutter) calc(10px + env(safe-area-inset-bottom, 0px)); background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-top: 1px solid var(--rule); transform: translateY(0); transition: transform var(--t-med); }
  .mobile-bar.is-hidden { transform: translateY(110%); }
  .mobile-bar-ask { font-size: var(--fs-meta); font-weight: 700; white-space: nowrap; }
  .mobile-bar .btn { min-height: 46px; }
  body { padding-bottom: 76px; }
  .nav-ask { display: none; }
  .site-footer { padding-bottom: 20px; }
}

/* Footer */
.site-footer { background: var(--paper); border-top: 1px solid var(--rule); padding-block: clamp(48px, 6vw, 80px) 32px; color: var(--charcoal); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 4fr) repeat(3, minmax(0, 2fr)); gap: 36px 48px; }
.footer-purpose { margin-top: 14px; font-size: var(--fs-small); color: var(--ink-2); max-width: 36ch; }
.footer-col ul { list-style: none; display: grid; gap: 10px; margin-top: 16px; font-size: var(--fs-small); }
.footer-col a, .footer-col .link-btn { text-decoration: none; color: var(--charcoal); }
.footer-col a:hover, .footer-col .link-btn:hover { color: var(--slate); }
.footer-email { word-break: break-all; }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; margin-top: clamp(40px, 5vw, 64px); padding-top: 20px; border-top: 1px solid var(--rule); font-size: var(--fs-meta); color: var(--ink-2); }
.footer-base a { color: var(--ink-2); }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* Page hero (interior) */
.page-hero { padding-top: clamp(48px, 7vw, 110px); padding-bottom: clamp(40px, 5vw, 72px); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: 32px 96px; align-items: end; }
.page-hero h1 { margin-top: 18px; }
.page-hero .lede { margin-top: 24px; }
.page-hero-side { font-size: var(--fs-small); color: var(--ink-2); border-top: 1px solid var(--rule); padding-top: 18px; }
.page-hero-side a { color: var(--ink); }
.page-hero-side .side-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
@media (max-width: 900px) { .page-hero-grid { grid-template-columns: 1fr; } }
.anchor-nav { display: flex; flex-wrap: wrap; gap: 8px 28px; padding: 14px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); font-size: var(--fs-small); }
.anchor-nav a { text-decoration: none; color: var(--charcoal); padding: 4px 0; border-bottom: 1px solid transparent; }
.anchor-nav a:hover { border-bottom-color: var(--slate); }

/* Challenge detail (challenges page) */
.challenge { display: grid; grid-template-columns: 56px minmax(0, 5fr) minmax(0, 6fr); gap: 20px 48px; padding: clamp(40px, 5vw, 64px) 0; border-top: 1px solid var(--rule); scroll-margin-top: 100px; }
.challenge:last-of-type { border-bottom: 1px solid var(--rule); }
.challenge .ledger-num { padding-top: 10px; }
.challenge h2 { font-size: clamp(1.625rem, 1.2rem + 1.6vw, 2.5rem); }
.challenge .ch-lead { margin-top: 14px; color: var(--charcoal); }
.challenge .ch-detail { display: grid; gap: 18px; }
.challenge .ch-detail h3 { font-size: var(--fs-eyebrow); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); font-weight: 700; margin-bottom: 6px; }
.challenge .ch-detail p { font-size: var(--fs-small); color: var(--charcoal); }
.challenge .ch-example { border-left: 2px solid var(--olive); padding-left: 16px; }
.challenge .ch-example h3 { color: var(--olive-ink); }
.challenge .ch-actions { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; margin-top: 6px; }
@media (max-width: 900px) { .challenge { grid-template-columns: 40px minmax(0, 1fr); } .challenge .ch-detail { grid-column: 2; } }

/* Callout rows */
.cta-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px 40px; padding: clamp(28px, 4vw, 44px) 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.cta-row h2 { font-size: clamp(1.375rem, 1.1rem + 1.2vw, 2rem); max-width: 28ch; }
.cta-row .actions { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; }

/* Reveal motion */
.reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: no-preference) {
  .js .reveal { opacity: 0; transform: translateY(8px); transition: opacity 600ms cubic-bezier(.2,.7,.2,1), transform 600ms cubic-bezier(.2,.7,.2,1); }
  .js .reveal.is-in { opacity: 1; transform: none; }
  .js .hero-chart .hc-line-a, .js .hero-chart .hc-line-b { stroke-dasharray: 2600; stroke-dashoffset: 2600; animation: draw 1800ms cubic-bezier(.4,0,.2,1) 200ms forwards; }
  .js .hero-chart .hc-signal { stroke-dasharray: 600; stroke-dashoffset: 600; animation: draw 900ms cubic-bezier(.4,0,.2,1) 1300ms forwards; }
  .js .hero-chart .hc-peak, .js .hero-chart .hc-annot, .js .hero-chart .hc-band { opacity: 0; animation: fadein 600ms ease 2000ms forwards; }
  .js .hero-chart .hc-reflabel, .js .hero-chart .hc-ref { opacity: 0; animation: fadein 600ms ease 900ms forwards; }
  .js .hero h1 > span { display: inline-block; opacity: 0; transform: translateY(10px); animation: rise 700ms cubic-bezier(.2,.7,.2,1) forwards; }
  .js .hero h1 > span:nth-child(2) { animation-delay: 120ms; }
  .js .hero h1 > span:nth-child(3) { animation-delay: 240ms; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fadein { to { opacity: 1; } }
@keyframes rise { to { opacity: 1; transform: none; } }
.hero h1 > span { display: block; }

/* 404 */
.notfound { min-height: 50vh; display: grid; align-content: center; gap: 20px; }

/* Print */
@media print { .site-header, .mobile-bar, .drawer, .drawer-backdrop, .site-footer nav { display: none !important; } body { padding-bottom: 0; } }

/* Narrow-screen safety */
.ch-detail, .service-detail, .demo-intro, .services-list, .contact-copy, .form-panel, .statement > div, .hero-copy, .page-hero-grid > div { min-width: 0; }
@media (max-width: 480px) { .btn { white-space: normal; text-align: center; line-height: 1.3; padding-block: 10px; } }
.page-services .services-side h2 { font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.125rem); margin-top: 14px; }
.page-services .service-block h3 { font-size: 1.375rem; }
.page-contact h1 { font-size: clamp(2rem, 1.2rem + 2.6vw, 3.25rem); }


/* ---------- Premium polish ---------- */
p, li, dd { text-wrap: pretty; }
@view-transition { navigation: auto; }
@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root) { animation: 160ms ease-out both vt-out; }
  ::view-transition-new(root) { animation: 220ms ease-in both vt-in; }
}
@keyframes vt-out { to { opacity: 0; } }
@keyframes vt-in { from { opacity: 0; transform: translateY(6px); } }

/* Reading progress hairline */
.progress-line { position: fixed; top: 0; left: 0; height: 2px; width: 100%; transform-origin: left; transform: scaleX(0); background: var(--slate); z-index: 70; pointer-events: none; }

/* Header shrink */
.site-header .header-inner { transition: min-height var(--t-med); }
.site-header.is-scrolled .header-inner { min-height: 64px; }
.site-header.is-scrolled .brand-name { font-size: 1.125rem; }
.brand-name { transition: font-size var(--t-med); }
@media (max-width: 980px) { .nav-menu { inset: 64px 0 0 0; } .site-header:not(.is-scrolled) .nav-menu { inset: 76px 0 0 0; } }

/* Hero chart interactivity */
.hero-chart-box { cursor: crosshair; }
.hero-crosshair { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--slate); opacity: 0; transition: opacity var(--t-fast); pointer-events: none; }
.hero-crosshair::after, .hero-crosshair::before { content: ""; position: absolute; left: 50%; width: 9px; height: 9px; border-radius: 50%; transform: translate(-50%, -50%); background: var(--charcoal); border: 2px solid var(--gray); }
.hero-crosshair::after { top: var(--ya); }
.hero-crosshair::before { top: var(--yb); background: var(--chart-b); }
.hero-crosshair.is-on { opacity: 1; }
.hero-tip { transform: translate(-50%, 0); top: 0; }

/* Ledger glyphs */
.ledger-link { grid-template-columns: 56px 48px minmax(0, 6fr) minmax(0, 5fr) 40px; }
.ledger-glyph { width: 40px; height: 40px; color: var(--charcoal); align-self: start; margin-top: -2px; }
.ledger-glyph svg { width: 40px; height: 40px; overflow: visible; }
.ledger-glyph circle, .ledger-glyph rect[fill="#4A5B7A"] { transition: transform var(--t-med); transform-origin: center; transform-box: fill-box; }
.ledger-link:hover .ledger-glyph circle, .ledger-link:hover .ledger-glyph rect[fill="#4A5B7A"] { transform: scale(1.25); }
@media (max-width: 800px) {
  .ledger-link { grid-template-columns: 40px 32px minmax(0, 1fr) 28px; }
  .ledger-glyph { width: 28px; height: 28px; } .ledger-glyph svg { width: 28px; height: 28px; }
  .ledger-desc { grid-column: 3; }
  .ledger-arrow { grid-column: 4; }
}

/* Statement band */
.statement-band { background: var(--gray); padding-block: clamp(64px, 9vw, 140px); }
.statement-text { font-size: clamp(1.5rem, 1rem + 2.4vw, 3rem); line-height: 1.28; letter-spacing: -0.01em; max-width: 24ch; text-wrap: balance; color: var(--espresso); }
.statement-text::first-letter { color: var(--slate); }

/* Shelf illustration */
.shelf-figure { margin: 0; }
.shelf-figure .shelf-illo { width: 100%; height: auto; }
.shelf-figure figcaption { margin-top: 12px; max-width: 48ch; }

/* Dark chapter grain */
.chapter-dark { position: relative; isolation: isolate; }
.chapter-dark::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .07; pointer-events: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }

/* Footer wordmark */
.footer-mark { position: relative; padding-bottom: clamp(24px, 4vw, 48px); margin-bottom: clamp(32px, 5vw, 64px); border-bottom: 1px solid var(--rule); overflow: hidden; }
.footer-wordmark { display: block; font-weight: 700; font-size: clamp(3.5rem, 14vw, 13rem); line-height: .95; letter-spacing: -0.03em; color: var(--espresso); }
.footer-signal { position: absolute; left: var(--gutter); right: var(--gutter); bottom: clamp(24px, 4vw, 48px); width: calc(100% - var(--gutter) * 2); height: clamp(24px, 4vw, 56px); opacity: .9; }

/* Challenge numerals, editorial scale */
.challenge .ledger-num { font-size: clamp(1.5rem, 1rem + 1.6vw, 2.5rem); color: var(--rule-strong); letter-spacing: 0; line-height: 1; padding-top: 6px; }

/* Buttons: refined hover */
.btn-primary { box-shadow: inset 0 0 0 0 rgba(255,255,255,0); }
.btn-primary:hover { box-shadow: inset 0 -2px 0 0 rgba(255,255,255,.18); }

/* ---------- Hero artwork: The Current ---------- */
.hero-art { margin-top: -76px; padding: 0; min-height: min(92vh, 980px); display: flex; align-items: flex-end; background: var(--espresso); overflow: hidden; }
.hero-art::before { display: none; } /* no grain over the canvas */
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity 1200ms ease; }
.hero-canvas.is-ready { opacity: 1; }
.hero-static { position: absolute; inset: 0; background:
  linear-gradient(90deg, rgba(38,33,33,.62) 0%, rgba(38,33,33,.35) 38%, rgba(38,33,33,0) 60%),
  linear-gradient(180deg, rgba(38,33,33,0) 0%, rgba(38,33,33,0) 55%, rgba(38,33,33,.5) 100%); pointer-events: none; }
.hero-art-inner { position: relative; z-index: 1; padding-top: calc(76px + clamp(48px, 8vw, 120px)); padding-bottom: clamp(28px, 4vw, 48px); display: grid; gap: clamp(40px, 7vw, 110px); }
.hero-art-copy { max-width: 60ch; }
.hero-art .eyebrow { color: var(--on-dark-2); }
.hero-art h1 { color: #fff; font-size: var(--fs-display); line-height: 1.02; letter-spacing: -0.022em; margin-top: 26px; }
@media (min-width: 1000px) { .hero-art h1 > span { white-space: nowrap; } }
.hero-art h1 .signal-word { color: var(--slate-light); }
.hero-art .lede { color: var(--on-dark); margin-top: 28px; max-width: 52ch; }
.hero-art .hero-actions { margin-top: 36px; }
.hero-art .text-link { color: var(--on-dark); border-color: var(--rule-dark); }
.hero-art .text-link:hover { border-color: var(--on-dark); }
.hero-art-foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 16px 40px; border-top: 1px solid rgba(221,225,230,.18); padding-top: 18px; }
.hero-built-for { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 36px; font-size: var(--fs-meta); color: var(--on-dark-2); }
.hero-built-for li { display: inline-flex; align-items: center; gap: 10px; }
.hero-built-for li::before { content: ""; width: 6px; height: 6px; background: var(--slate-light); flex: none; }
.hero-art-caption { font-size: var(--fs-eyebrow); letter-spacing: .12em; text-transform: uppercase; color: rgba(221,225,230,.45); font-weight: 700; white-space: nowrap; }

/* Header over the dark hero */
.page-index .site-header:not(.is-scrolled) { background: transparent; }
.page-index .site-header:not(.is-scrolled) .brand, .page-index .site-header:not(.is-scrolled) .nav-link { color: var(--on-dark); }
.page-index .site-header:not(.is-scrolled) .brand-mark { color: var(--on-dark-2); }
.page-index .site-header:not(.is-scrolled) .nav-link::after { background: var(--slate-light); }
.page-index .site-header:not(.is-scrolled) .nav-ask { color: var(--on-dark); border-color: rgba(221,225,230,.3); }
.page-index .site-header:not(.is-scrolled) .nav-ask:hover { border-color: var(--on-dark); }
.page-index .site-header:not(.is-scrolled) .nav-toggle { color: var(--on-dark); border-color: rgba(221,225,230,.3); }
.page-index .site-header:not(.is-scrolled) .nav-actions .btn-primary { background: var(--slate-light); color: var(--espresso); border-color: var(--slate-light); }
@media (max-width: 980px) { .page-index .site-header:not(.is-scrolled) .nav-menu.is-open { background: var(--paper); } .page-index .site-header:not(.is-scrolled) .nav-menu.is-open .nav-link { color: var(--charcoal); } .page-index .site-header:not(.is-scrolled) .nav-menu.is-open .btn-primary { background: var(--slate); color: #fff; border-color: var(--slate); } .page-index .site-header:not(.is-scrolled) .nav-menu.is-open .nav-ask { color: var(--ink); border-color: var(--rule-strong); } }
.hero-art .btn-primary { background: var(--slate-light); color: var(--espresso); border-color: var(--slate-light); }
.hero-art .btn-primary:hover { background: #A5B6D4; border-color: #A5B6D4; }
@media (max-width: 760px) {
  .hero-art { min-height: min(88vh, 820px); }
  .hero-art h1 { max-width: none; }
  .hero-art-caption { display: none; }
  .hero-built-for { flex-direction: column; gap: 8px; }
}

/* Photo band (About) */
.photo-band { margin: 0; position: relative; }
.photo-band img, .photo-band canvas { width: 100%; height: clamp(32px, 4.8vw, 64px); object-fit: cover; display: block; filter: saturate(.78) contrast(1.02); }
.photo-band figcaption { position: absolute; left: var(--gutter); top: 50%; transform: translateY(-50%); font-size: var(--fs-eyebrow); letter-spacing: .12em; text-transform: uppercase; color: rgba(221,225,230,.75); font-weight: 700; }
.photo-band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(38,33,33,.55), rgba(38,33,33,0) 45%); pointer-events: none; }
@media (max-width: 760px) { .photo-band figcaption { display: none; } }


/* Display face applications */
.brand-name, .footer-wordmark, .statement-text, .ledger-title, .drawer-title, .hc-annot-card .num-big, .form-success h3 { font-family: var(--font-display); font-weight: 400; }
.brand-name { font-size: 1.375rem; letter-spacing: 0; }
.site-header.is-scrolled .brand-name { font-size: 1.25rem; }
.footer-wordmark { letter-spacing: -0.015em; }
.hero-art h1, .hero h1 { letter-spacing: -0.012em; line-height: 1.0; }
.principles h3, .workflow-col .eyebrow, .step h3, .engagement h3, .demo-intro h3, .service-block h3, .challenge h2, .contact-copy h2, .form-panel h3, .cta-row h2, .section-head h2, .statement h2, .page-hero h1, .questions li, .notfound h1 { font-family: var(--font-display); font-weight: 400; }
.principles h3 { font-size: 1.25rem; }
.step h3 { font-size: 1.5rem; }
.questions li { font-family: var(--font-display); }
.hero-side-list, .ledger-desc, .lede, .svc-lead { font-family: var(--font); }


/* ---------- Supplied logo ---------- */
.brand { gap: 0; }
.brand-lockup { height: 50px; width: auto; display: block; transition: height var(--t-med); }
.site-header.is-scrolled .brand-lockup { height: 42px; }
.brand-mark-img { display: none; height: 40px; width: auto; }
@media (max-width: 600px) { .brand-lockup { display: none; } .brand-mark-img { display: block; } }
.footer-lockup { display: block; width: min(100%, 720px); height: auto; margin-bottom: 8px; }
.footer-wordmark { display: none; }
/* The supplied artwork is dark-on-transparent, so the header keeps a light
   ground over the hero rather than going transparent. A reverse (light) lockup
   would allow the transparent treatment; flagged in the README. */
.page-index .site-header:not(.is-scrolled) { background: color-mix(in srgb, var(--paper) 94%, transparent); border-bottom-color: var(--rule); }
.page-index .site-header:not(.is-scrolled) .brand, .page-index .site-header:not(.is-scrolled) .nav-link { color: var(--charcoal); }
.page-index .site-header:not(.is-scrolled) .nav-link::after { background: var(--slate); }
.page-index .site-header:not(.is-scrolled) .nav-ask { color: var(--ink); border-color: var(--rule-strong); }
.page-index .site-header:not(.is-scrolled) .nav-toggle { color: var(--ink); border-color: var(--rule-strong); }
.page-index .site-header:not(.is-scrolled) .nav-actions .btn-primary { background: var(--slate); color: #fff; border-color: var(--slate); }
.hero-art { margin-top: 0; }
.hero-art-inner { padding-top: clamp(64px, 9vw, 130px); }
.footer-mark { overflow: visible; }
.footer-signal { position: static; display: block; width: 100%; height: clamp(28px, 4vw, 56px); margin-top: 20px; }
.header-inner { gap: 40px; }

/* Header fit: the brand never shrinks; the navigation yields instead */
.brand { flex: none; }
.brand-lockup, .brand-mark-img { max-width: none; }
.site-nav { min-width: 0; }
@media (max-width: 1280px) { .nav-ask { display: none; } .nav-list { gap: 20px; } }
/* Compact booking button beside the Menu toggle on tablets and narrow windows */
.nav-cta-compact { display: none; }
@media (min-width: 761px) and (max-width: 1100px) { .nav-cta-compact { display: inline-flex; min-height: 42px; padding-inline: 16px; margin-right: 12px; white-space: nowrap; } }
@media (max-width: 1100px) {
  .nav-toggle { display: inline-flex; align-items: center; gap: 10px; background: none; border: 1px solid var(--rule-strong); border-radius: var(--radius); min-height: 42px; padding: 0 14px; cursor: pointer; font-size: var(--fs-small); font-weight: 700; }
  .nav-toggle-bars { display: inline-flex; flex-direction: column; gap: 5px; width: 18px; }
  .nav-toggle-bars i { display: block; height: 1.5px; background: currentColor; transition: transform var(--t-med), opacity var(--t-med); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child { transform: translateY(3.25px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child { transform: translateY(-3.25px) rotate(-45deg); }
  .nav-menu { position: fixed; inset: 76px 0 0 0; background: var(--paper); flex-direction: column; align-items: stretch; justify-content: flex-start; padding: 24px var(--gutter) 40px; gap: 32px; overflow-y: auto; transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity var(--t-med), transform var(--t-med), visibility 0s linear var(--t-med); border-top: 1px solid var(--rule); }
  .site-header.is-scrolled .nav-menu { inset: 64px 0 0 0; }
  .nav-menu.is-open { opacity: 1; transform: none; visibility: visible; transition-delay: 0s; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-list li + li { border-top: 1px solid var(--rule); }
  .nav-link { display: block; font-size: 1.5rem; padding: 16px 0; }
  .nav-link::after { display: none; }
  .nav-actions { flex-direction: column; align-items: stretch; }
  .nav-actions .btn { min-height: 52px; }
  .nav-ask { display: inline-flex; }
}
@media (max-width: 640px) { .brand-lockup { height: 40px; } .site-header.is-scrolled .brand-lockup { height: 36px; } }
@media (max-width: 480px) { .brand-lockup { display: none; } .brand-mark-img { display: block; } }
@media (min-width: 481px) and (max-width: 600px) { .brand-lockup { display: block; } .brand-mark-img { display: none; } }
@media (max-width: 1440px) { .brand-lockup { height: 44px; } .site-header.is-scrolled .brand-lockup { height: 40px; } .nav-list { gap: 20px; } .header-inner { gap: 28px; } }
@media (max-width: 640px) { .brand-lockup { height: 40px; } }


/* Founder hero */
.founder-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); gap: 40px 96px; align-items: start; }
.founder-hero h1 { margin-top: 18px; }
.founder-copy .lede { margin-top: 24px; }
.founder-body { margin-top: 18px; color: var(--charcoal); max-width: var(--measure); }
.founder-actions { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; margin-top: 32px; }
.founder-portrait { margin: 0; }
.portrait-frame { position: relative; aspect-ratio: 4 / 5; max-width: 100%; background: var(--paper-2); border: 1px solid var(--rule); overflow: hidden; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; display: block; filter: saturate(.88); }
.portrait-frame::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--slate); }
.portrait-missing { display: none; position: absolute; inset: 0; place-content: center; text-align: center; gap: 6px; background: repeating-linear-gradient(135deg, var(--paper) 0 10px, var(--paper-2) 10px 11px); color: var(--ink-2); font-size: var(--fs-small); }
.portrait-frame.is-missing img { display: none; }
.portrait-frame.is-missing .portrait-missing { display: grid; }
.founder-portrait figcaption { margin-top: 14px; font-size: var(--fs-small); display: grid; gap: 2px; }
.founder-portrait figcaption span { color: var(--ink-2); font-size: var(--fs-meta); }
@media (max-width: 900px) { .founder-grid { grid-template-columns: 1fr; } .founder-portrait { order: -1; max-width: 360px; } }
@media (max-width: 1000px) { .page-about .principles { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; } .page-about .principles li:nth-child(3) { border-left: 0; padding-left: 0; } .page-about .principles li:nth-child(n+3) { border-top: 1px solid var(--rule); } }
@media (max-width: 600px) { .page-about .principles { grid-template-columns: 1fr !important; } }

/* Founder, quiet placement */
.founder-quiet { grid-template-columns: minmax(0, 3fr) minmax(0, 8fr); gap: 32px 72px; align-items: start; }
.founder-quiet .founder-portrait { max-width: 320px; }
.founder-quiet h2 { font-size: clamp(1.75rem, 1.2rem + 1.8vw, 2.5rem); margin-top: 14px; }
.founder-quiet .founder-actions { margin-top: 24px; }
@media (max-width: 900px) { .founder-quiet { grid-template-columns: 1fr; } .founder-quiet .founder-portrait { max-width: 280px; order: 0; } }


/* Glossary */
.glossary-head { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem); margin-top: clamp(40px, 5vw, 64px); padding-bottom: 14px; border-bottom: 1px solid var(--rule-strong); scroll-margin-top: 100px; }
.glossary-head:first-child { margin-top: 0; }
.glossary { margin: 0; }
.glossary .term { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 12px 48px; padding: 26px 0; border-bottom: 1px solid var(--rule); }
.glossary dt { font-family: var(--font-display); font-size: 1.375rem; line-height: 1.25; }
.glossary dd { margin: 0; color: var(--charcoal); font-size: var(--fs-small); display: grid; gap: 10px; }
.glossary .formula { font-variant-numeric: tabular-nums; background: var(--paper-2); border-left: 3px solid var(--slate); padding: 8px 12px; color: var(--ink); font-size: var(--fs-meta); }
.glossary .why { color: var(--ink-2); }
@media (max-width: 760px) { .glossary .term { grid-template-columns: 1fr; gap: 8px; } }

/* How the work flows */
.flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule-strong); border-bottom: 1px solid var(--rule-strong); }
.flow > div { padding: 28px 28px 32px 0; position: relative; }
.flow > div + div { padding-left: 28px; border-left: 1px solid var(--rule-strong); }
.flow > div + div::before { content: "→"; position: absolute; left: -9px; top: 30px; background: var(--paper); color: var(--slate); font-size: 1rem; line-height: 1; padding: 2px 0; }
.chapter-panel .flow > div + div::before { background: var(--paper-2); }
.flow h3 { font-size: 1.25rem; margin-top: 10px; }
.flow ul { list-style: none; display: grid; gap: 6px; margin-top: 12px; font-size: var(--fs-small); color: var(--charcoal); }
.flow ul li { padding-left: 16px; position: relative; }
.flow ul li::before { content: ""; position: absolute; left: 0; top: .75em; width: 8px; height: 1px; background: var(--slate); }
.flow .is-signal h3 { color: var(--slate); }
.flow .flow-note { margin-top: 14px; font-size: var(--fs-meta); color: var(--ink-2); }
@media (max-width: 960px) { .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); } .flow > div:nth-child(3) { border-left: 0; padding-left: 0; } .flow > div:nth-child(3)::before { display: none; } .flow > div:nth-child(n+3) { border-top: 1px solid var(--rule-strong); } }
@media (max-width: 560px) { .flow { grid-template-columns: 1fr; } .flow > div + div { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule-strong); } .flow > div + div::before { display: none; } .flow > div { padding: 22px 0 26px; } }

/* By role */
.roles { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; margin-top: 24px; font-size: var(--fs-meta); color: var(--ink-2); }
.roles .role { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--rule-strong); border-radius: 999px; padding: 7px 14px; text-decoration: none; color: var(--charcoal); background: var(--paper); transition: border-color var(--t-fast), background var(--t-fast); }
.roles .role:hover { border-color: var(--slate); background: var(--slate-wash); }
.roles .role b { color: var(--ink); font-weight: 700; }

/* FAQ */
.faq { border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; list-style: none; display: grid; grid-template-columns: minmax(0, 1fr) 28px; gap: 16px; align-items: center; padding: 20px 0; font-family: var(--font-display); font-size: 1.25rem; line-height: 1.3; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--slate); font-size: 1.5rem; line-height: 1; justify-self: end; transition: transform var(--t-med); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .faq-body { padding: 0 44px 22px 0; color: var(--charcoal); font-size: var(--fs-small); max-width: var(--measure); }
.faq .faq-body p + p { margin-top: 10px; }

/* Data handling */
.trust { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule); }
.trust > div { padding: 22px 24px 26px 0; }
.trust > div + div { padding-left: 24px; border-left: 1px solid var(--rule); }
.trust h3 { font-size: 1.125rem; font-weight: 700; font-family: var(--font); letter-spacing: 0; }
.trust p { margin-top: 8px; font-size: var(--fs-small); color: var(--charcoal); }
@media (max-width: 800px) { .trust { grid-template-columns: 1fr; } .trust > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); } .trust > div { padding: 18px 0 22px; } }

/* First look offer */
.first-look { background: var(--espresso); color: var(--on-dark); border-radius: var(--radius); padding: clamp(24px, 3vw, 36px); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 40px; align-items: center; }
.first-look .eyebrow { color: var(--slate-light); }
.first-look h3 { color: #fff; font-size: 1.5rem; margin-top: 8px; }
.first-look p { margin-top: 10px; font-size: var(--fs-small); color: var(--on-dark); max-width: 56ch; }
.first-look .meta { color: var(--on-dark-2); }
@media (max-width: 760px) { .first-look { grid-template-columns: 1fr; } }


/* ---------- Luxe / weight pass ---------- */
:root {
  --radius: 0px;
  --amber: #FFA600;            /* from the logo mark; dark chapters only, one element per view */
  --amber-ink: #B86E00;        /* amber for small text on light surfaces, 4.6:1 on paper */
  --slate: #3F4F6C;            /* a shade deeper for actions */
  --slate-deep: #2F3B52;
  --rule: #BFC5CD;             /* firmer hairlines */
  --rule-strong: #9AA1AA;
  --ink-2: #4E5156;
}
body { color: var(--espresso); }
.lede, .founder-body, .service-detail dd, .ch-detail p, .demo-intro dd, .step p, .engagement p, .statement p, .glossary dd, .faq .faq-body, .trust p { color: var(--charcoal); }
.eyebrow { color: var(--charcoal); letter-spacing: .18em; }
.chapter-dark .eyebrow { color: var(--on-dark-2); }
h1, h2 { letter-spacing: -0.015em; }
.section-head h2, .statement h2, .page-hero h1 { text-wrap: balance; }

/* Square, heavier controls */
.btn { border-radius: 0; text-transform: uppercase; letter-spacing: .12em; font-size: .8125rem; min-height: 52px; padding: 0 26px; }
.btn-lg { min-height: 60px; padding: 0 32px; font-size: .875rem; }
.btn-primary { background: var(--slate); border-color: var(--slate); box-shadow: none; }
.btn-primary:hover { background: var(--espresso); border-color: var(--espresso); box-shadow: none; }
.btn-ghost { border-color: var(--espresso); color: var(--espresso); }
.btn-ghost:hover { background: var(--espresso); color: var(--paper); }
.chapter-dark .btn-primary, .hero-art .btn-primary { background: var(--paper); color: var(--espresso); border-color: var(--paper); }
.chapter-dark .btn-primary:hover, .hero-art .btn-primary:hover { background: var(--amber); border-color: var(--amber); color: var(--espresso); }
.chapter-dark .btn-ghost { color: var(--on-dark); border-color: var(--on-dark-2); }
.chapter-dark .btn-ghost:hover { background: var(--on-dark); color: var(--espresso); }
.text-link { text-transform: uppercase; letter-spacing: .1em; font-size: .78rem; border-bottom-color: var(--espresso); }
.chapter-dark .text-link, .hero-art .text-link { border-bottom-color: var(--on-dark-2); }
.chip, .seg, .seg button, .demo-expand, .roles .role, .nav-toggle, .drawer-close, .field input, .field textarea, .field select, .demo-frame, .embed, .form-panel, .first-look, .drawer-note, .glossary .formula, .portrait-frame, .review-flag, .form-status { border-radius: 0; }
.chip { border-radius: 0; }
.drawer-close { border-radius: 0; }

/* Firmer structure */
.section-head { border-top: 2px solid var(--espresso); padding-top: 28px; }
.hero-art-foot { border-top-color: rgba(221,225,230,.28); }
.ledger, .steps, .flow, .progression, .principles, .glossary-head, .anchor-nav, .trust, .faq { border-top-color: var(--espresso); }
.ledger { border-top-width: 2px; }
.ledger-title { font-size: clamp(1.375rem, 1.1rem + 1vw, 1.75rem); }
.ledger-num { color: var(--charcoal); font-weight: 700; }
.step::before { height: 4px; }
.signal-rule { height: 4px; }
.hc-annot-card, .demo-note, .glossary .formula { border-left-width: 4px; }
.site-header.is-scrolled { border-bottom-color: var(--espresso); }
.progress-line { background: var(--espresso); height: 3px; }

/* Hero: the logo's river runs through it */
.hero-art h1 .signal-word { color: var(--amber); }
.hero-built-for li::before { background: var(--amber); }
.hero-art-caption { color: rgba(221,225,230,.5); }

/* Statement band goes dark */
.statement-band { background: var(--charcoal); color: var(--on-dark); position: relative; isolation: isolate; }
.statement-band::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .07; pointer-events: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.statement-band .signal-rule { background: var(--amber); }
.statement-text { color: #fff; }
.statement-text::first-letter { color: var(--amber); }

/* Dark chapter accents */
.chapter-dark .signal-rule { background: var(--amber); }
.next-steps li .n { color: var(--amber); }
.first-look .eyebrow { color: var(--amber); }
.first-look { border-radius: 0; border-left: 4px solid var(--amber); }
.portrait-frame::after { background: var(--amber); }

/* Example section ground: deeper gray */
.chapter-gray { background: #D3D8DE; }
.chapter-gray .demo-frame { background: var(--paper); }

/* Footer weight */
.site-footer { border-top: 2px solid var(--espresso); }
.footer-base { border-top-color: var(--rule-strong); }

/* Mobile bar */
.mobile-bar { background: color-mix(in srgb, var(--espresso) 94%, transparent); border-top-color: var(--rule-dark); }
.mobile-bar-ask { color: var(--on-dark); }
.mobile-bar .btn-primary { background: var(--paper); color: var(--espresso); border-color: var(--paper); }

/* Forms */
.field input, .field textarea { border-color: var(--rule-strong); }
.field input:focus, .field textarea:focus { border-color: var(--espresso); box-shadow: none; }
.form-tabs button[aria-selected="true"] { border-bottom-color: var(--espresso); }

/* Light panels inside dark chapters keep light-surface controls */
.chapter-dark .form-panel .btn-primary { background: var(--slate); color: #fff; border-color: var(--slate); }
.chapter-dark .form-panel .btn-primary:hover { background: var(--espresso); border-color: var(--espresso); }
.chapter-dark .form-panel .btn-ghost { color: var(--espresso); border-color: var(--espresso); }
.chapter-dark .form-panel .btn-ghost:hover { background: var(--espresso); color: var(--paper); }
.chapter-dark .form-panel .eyebrow { color: var(--charcoal); }
.chapter-dark .form-panel .text-link { border-bottom-color: var(--espresso); }


/* ---------- Channel-informed palette ----------
   Home center is owned by two colors: Home Depot's orange and Lowe's blue.
   Riparian borrows the territory, not the swatches: a deep navy for actions
   and analytical emphasis (where slate was), and the logo's own amber as the
   single warm accent. Espresso and charcoal still carry the structure. */
:root {
  --slate: #1F3A66;          /* navy action colour, 9.6:1 on paper */
  --slate-deep: #15294A;
  --slate-light: #8FA8D6;    /* navy on espresso */
  --slate-wash: rgba(31, 58, 102, 0.10);
  --amber: #FFA600;          /* unchanged: the logo's river */
}
.hc-band { fill: var(--slate-wash); }
.legend-swatch.signal, .hc-signal, .hc-peak { stroke: var(--slate); }
.hc-peak { fill: var(--slate); }
.footer-signal path:last-of-type, .footer-signal circle { stroke: var(--slate); fill: var(--slate); }
.footer-signal path:nth-of-type(2) { stroke: var(--slate); }
.brand-mark path:last-of-type, .brand-mark circle { stroke: var(--slate); fill: var(--slate); }
.ledger-glyph circle, .ledger-glyph rect[fill="#4A5B7A"] { fill: var(--slate); }
.statement-text::first-letter { color: var(--amber); }
.step.is-signal::before { background: var(--slate); }
.flow .is-signal h3 { color: var(--slate); }
.demo-note { border-left-color: var(--slate); }
.chip[aria-pressed="true"], .seg button[aria-pressed="true"] { background: var(--slate); border-color: var(--slate); color: #fff; }
.chapter-dark .next-steps li .n, .first-look .eyebrow { color: var(--amber); }
.hero-art .btn-primary:hover { background: var(--amber); border-color: var(--amber); }