/* Product-led case study layout (first used by rdash.html).
   Reusable blocks: .cs-hero, .cs-metrics, .cs-section (+ .is-dark / .is-paper), .cs-split,
   .cs-bento, .cs-shot, .cs-story, .cs-lifecycle, .cs-principle, .cs-card, .cs-outcomes,
   .cs-rail, .cs-cta. Per-project colours live in the :root tokens below. */

:root {
  /* RDash design-system tokens: surface/default (dark), surface/lowest (light), primaries */
  --ink: #0F172A;
  --ink-raised: #16213A;
  --paper: #FAFAFA;
  --white: #FFFFFF;
  --navy: #1E3A5F;
  --sky: #A8C4E8;
  /* accents sampled from production screens (approximate) */
  --red: #EE3E42;
  --teal: #61C7CD;
  --blue: #5D98FF;

  --text: #0F172A;
  --text-muted: #475467;
  --text-on-dark: #F1F5F9;
  --muted-on-dark: #A3AEC2;
  --line: rgba(15, 23, 42, .10);
  --line-dark: rgba(255, 255, 255, .10);
  --link: #1D4ED8;

  --font: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Linux Libertine", Georgia, Times, serif;
  --max: 1200px;
  --read: 640px;
  --gutter: 24px;
  --radius: 16px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--white); color: var(--text); font: 400 17px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 4px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 100; }
.skip-link:focus { left: 8px; top: 8px; background: #fff; color: var(--text); padding: 8px 12px; border: 1px solid var(--line); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* ───────── site header (matches the rest of buddh.in) ───────── */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.header-inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); height: 56px; display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--text); text-decoration: none; }
.brand-mark { width: 36px; height: 36px; }
.brand-words { display: flex; flex-direction: column; line-height: 1; font-family: var(--font-serif); }
.brand-name { font-size: 18px; letter-spacing: .08em; font-variant: small-caps; text-transform: lowercase; }
.brand-tag { font-size: 11px; margin-top: 4px; }
.top-nav { margin-left: auto; }
.top-nav ul { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; font-size: 15px; }
.top-nav a { color: var(--text-muted); text-decoration: none; }
.top-nav a:hover, .top-nav a[aria-current="page"] { color: var(--text); }
.menu-btn { display: none; width: 44px; height: 44px; margin-left: -10px; align-items: center; justify-content: center; background: none; border: 0; color: var(--text); cursor: pointer; }
.menu-btn svg { width: 20px; height: 20px; }
.main-menu { display: none; position: absolute; top: 56px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); padding: 6px 0 10px; }
.main-menu.open { display: block; }
.main-menu ul { list-style: none; margin: 0; padding: 0; }
.main-menu a { display: block; padding: 12px var(--gutter); color: var(--text); text-decoration: none; }

/* ───────── shared type ───────── */
.cs-eyebrow { margin: 0 0 14px; font-size: 13px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--navy); }
.is-dark .cs-eyebrow, .cs-hero .cs-eyebrow { color: var(--teal); }
.cs-h2 { margin: 0; font-size: clamp(32px, 4.4vw, 56px); line-height: 1.05; letter-spacing: -.03em; font-weight: 700; max-width: 18ch; }
.cs-h3 { margin: 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.1; letter-spacing: -.025em; font-weight: 700; max-width: 20ch; }
.cs-lede { margin: 18px 0 0; max-width: var(--read); font-size: clamp(17px, 1.5vw, 20px); line-height: 1.55; color: var(--text-muted); }
.is-dark .cs-lede, .is-dark .cs-muted { color: var(--muted-on-dark); }
.cs-muted { color: var(--text-muted); }
.cs-chapter-num { display: inline-block; margin-bottom: 14px; font-size: 13px; font-weight: 500; letter-spacing: .08em; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.is-dark .cs-chapter-num { color: var(--muted-on-dark); }
.cs-chapter-num b { color: var(--text); font-weight: 700; }
.is-dark .cs-chapter-num b { color: var(--text-on-dark); }
.cs-note { font-size: 13px; line-height: 1.5; color: var(--text-muted); }
.is-dark .cs-note { color: var(--muted-on-dark); }
.is-dark a { color: var(--sky); }

/* ───────── sections ───────── */
.cs-section { padding: 112px 0; position: relative; }
.cs-section.is-paper { background: var(--paper); }
.cs-section.is-dark { background: var(--ink); color: var(--text-on-dark); }
.cs-section + .cs-section.is-dark, .cs-section.is-dark + .cs-section:not(.is-dark) { border-top: 0; }
.cs-section-head { margin-bottom: 56px; }

/* ───────── hero ───────── */
.cs-hero { position: relative; overflow: hidden; background: var(--ink); color: var(--text-on-dark); padding: 36px 0 0; isolation: isolate; }
.cs-hero::before { /* restrained light beam */
  content: ""; position: absolute; z-index: -1; left: 50%; top: -30%; width: 1200px; height: 1100px; transform: translateX(-50%);
  background:
    radial-gradient(38% 30% at 50% 62%, rgba(97,199,205,.22), transparent 70%),
    radial-gradient(30% 24% at 32% 70%, rgba(93,152,255,.16), transparent 70%),
    conic-gradient(from 180deg at 50% 0%, transparent 160deg, rgba(168,196,232,.08) 180deg, transparent 200deg);
  pointer-events: none;
}
.cs-back { display: inline-flex; align-items: center; gap: 6px; margin-bottom: 16px; font-size: 14px; color: var(--muted-on-dark); text-decoration: none; min-height: 44px; }
.cs-back:hover { color: var(--text-on-dark); }
.cs-hero h1 { margin: 0; }
.cs-name { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 500; letter-spacing: -.01em; color: var(--sky); margin-bottom: 18px; }
.cs-name .el { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 1px solid rgba(168,196,232,.4); border-radius: 6px; font: 400 20px var(--font-serif); color: var(--text-on-dark); }
.cs-headline { display: block; font-size: clamp(40px, 5.6vw, 76px); line-height: 1.0; letter-spacing: -.04em; font-weight: 700; max-width: 15ch; color: #fff; }
.cs-hero-copy { margin: 20px 0 0; max-width: 58ch; font-size: clamp(17px, 1.6vw, 20px); color: var(--muted-on-dark); }
.cs-meta { margin: 28px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, max-content)); gap: 12px 48px; }
.cs-meta div { border-left: 1px solid var(--line-dark); padding-left: 14px; }
.cs-meta dt { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-on-dark); }
.cs-meta dd { margin: 2px 0 0; font-size: 16px; color: var(--text-on-dark); }
.cs-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.cs-btn { display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 999px; font-size: 16px; font-weight: 500; text-decoration: none; transition: transform .2s var(--ease), background .2s, border-color .2s; }
.cs-btn.primary { background: #fff; color: var(--ink); }
.cs-btn.primary:hover { transform: translateY(-1px); background: #E8EEF7; }
.cs-btn.ghost { color: var(--text-on-dark); border: 1px solid rgba(255,255,255,.28); }
.cs-btn.ghost:hover { border-color: #fff; }
.cs-btn.dark { background: var(--ink); color: #fff; }
.cs-btn.dark:hover { background: var(--navy); }
.cs-btn.outline { color: var(--text); border: 1px solid var(--line); background: #fff; }
.cs-btn.outline:hover { border-color: var(--text); }
.cs-btn svg { width: 16px; height: 16px; }

.cs-stage { position: relative; margin: 40px auto 0; max-width: 1100px; height: 560px; }
.cs-stage::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 120px; background: linear-gradient(transparent, var(--ink)); pointer-events: none; z-index: 3; }
.cs-stage figure { margin: 0; position: absolute; }
.cs-stage .main { left: 50%; top: 0; width: min(647px, 62%); transform: translateX(-50%); z-index: 2; filter: drop-shadow(0 30px 60px rgba(0,0,0,.45)); }
.cs-stage .side { width: 40%; top: 70px; z-index: 1; opacity: .55; }
.cs-stage .side.left { left: 0; }
.cs-stage .side.right { right: 0; }
.cs-stage .glow { position: absolute; left: 50%; top: 18%; width: 70%; height: 60%; transform: translateX(-50%); background: radial-gradient(closest-side, rgba(97,199,205,.35), transparent); filter: blur(30px); z-index: 0; }

@media (min-width: 1100px) {
  .cs-hero { padding-bottom: 72px; }
  .cs-hero-grid { display: grid; grid-template-columns: minmax(0, 11fr) minmax(0, 10fr); gap: 32px; align-items: center; }
  .cs-headline { font-size: clamp(44px, 4.4vw, 66px); }
  .cs-meta { grid-template-columns: repeat(2, minmax(0, max-content)); gap: 16px 40px; }
  .cs-stage { margin: 0; height: 600px; max-width: none; }
  .cs-stage::after { display: none; }
  .cs-stage .main { left: auto; right: 0; top: 70px; width: 86%; transform: none; }
  .cs-stage .side.left { left: -6%; top: 0; width: 58%; opacity: .5; }
  .cs-stage .side.right { right: -14%; top: auto; bottom: 0; width: 48%; opacity: .45; }
  .cs-stage .glow { left: 55%; top: 30%; }
}

/* hero entrance */
@media (prefers-reduced-motion: no-preference) {
  .cs-hero .enter { animation: csEnter .8s var(--ease) both; }
  .cs-hero .enter.d1 { animation-delay: .08s; } .cs-hero .enter.d2 { animation-delay: .16s; } .cs-hero .enter.d3 { animation-delay: .26s; }
  @keyframes csEnter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
}

/* ───────── metrics ───────── */
.cs-metrics { background: var(--ink); color: var(--text-on-dark); padding: 24px 0 96px; }
.cs-metrics ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-dark); }
.cs-metrics li { padding: 28px 24px 0 0; }
.cs-metrics li + li { padding-left: 24px; border-left: 1px solid var(--line-dark); }
.cs-metric-value { display: block; white-space: nowrap; font-size: clamp(30px, 3.6vw, 52px); line-height: 1; font-weight: 700; letter-spacing: -.035em; color: #fff; font-variant-numeric: tabular-nums; }
.cs-metric-label { display: block; margin-top: 10px; font-size: 15px; color: var(--text-on-dark); }
.cs-metric-context { display: block; margin-top: 4px; font-size: 13px; color: var(--muted-on-dark); }
.cs-metrics .cs-note { margin-top: 28px; color: var(--muted-on-dark); }

/* ───────── challenge diagram ───────── */
.cs-split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 64px; align-items: center; }
.cs-split.reverse > :first-child { order: 2; }
.cs-split.even { grid-template-columns: 1fr 1fr; }
.cs-frag { display: grid; grid-template-columns: 1fr auto 1fr; gap: 20px; align-items: center; }
.cs-frag-col h3 { margin: 0 0 12px; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); font-weight: 500; }
.cs-frag-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.cs-frag-list li { padding: 12px 14px; background: #fff; border: 1px dashed rgba(15,23,42,.25); border-radius: 10px; font-size: 15px; line-height: 1.35; }
.cs-frag-list li b { display: block; font-size: 15px; }
.cs-frag-list li span { font-size: 13px; color: var(--text-muted); }
.cs-frag-list li:nth-child(1) { transform: rotate(-1.5deg); }
.cs-frag-list li:nth-child(2) { transform: rotate(1deg) translateX(10px); }
.cs-frag-list li:nth-child(3) { transform: rotate(-.6deg) translateX(-6px); }
.cs-frag-list li:nth-child(4) { transform: rotate(1.4deg) translateX(6px); }
.cs-frag-arrow { font-size: 28px; color: var(--text-muted); }
.cs-record { background: var(--ink); color: var(--text-on-dark); border-radius: var(--radius); padding: 18px; box-shadow: 0 24px 48px -24px rgba(15,23,42,.5); }
.cs-record b { display: block; font-size: 15px; margin-bottom: 10px; }
.cs-record ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; counter-reset: rec; }
.cs-record li { counter-increment: rec; display: flex; gap: 10px; align-items: center; font-size: 14px; padding: 6px 10px; border-radius: 8px; background: rgba(255,255,255,.05); }
.cs-record li::before { content: counter(rec, decimal-leading-zero); font-size: 12px; color: var(--teal); font-variant-numeric: tabular-nums; }

/* ───────── lifecycle ───────── */
.cs-lifecycle { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 0; counter-reset: stage; position: relative; }
.cs-lifecycle li { counter-increment: stage; position: relative; padding: 46px 14px 0 0; }
.cs-lifecycle li::before { content: counter(stage, decimal-leading-zero); position: absolute; top: 0; left: 0; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: #fff; font-size: 12px; font-variant-numeric: tabular-nums; z-index: 1; }
.cs-lifecycle li::after { content: ""; position: absolute; top: 17px; left: 34px; right: 0; height: 2px; background: repeating-linear-gradient(90deg, var(--teal) 0 6px, transparent 6px 10px); }
.cs-lifecycle li:last-child::after { display: none; }
.cs-lifecycle h3 { margin: 0; font-size: 17px; letter-spacing: -.01em; }
.cs-lifecycle p { margin: 6px 0 0; font-size: 14px; line-height: 1.45; color: var(--text-muted); }
.cs-lifecycle .carry { display: block; margin-top: 8px; font-size: 12px; color: var(--navy); font-weight: 500; }

/* ───────── screenshots ───────── */
.cs-shot { margin: 0; }
.cs-shot .frame { position: relative; display: block; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); overflow: hidden; }
.is-dark .cs-shot .frame { background: transparent; border-color: var(--line-dark); background: radial-gradient(80% 70% at 50% 40%, rgba(97,199,205,.14), transparent 70%), rgba(255,255,255,.02); }
.cs-shot img { width: 100%; height: auto; margin: 0 auto; }
.cs-shot .natural img { width: auto; max-width: 100%; }
.cs-shot figcaption { margin-top: 12px; font-size: 14px; line-height: 1.45; color: var(--text-muted); max-width: 60ch; }
.is-dark .cs-shot figcaption { color: var(--muted-on-dark); }
a.frame { cursor: zoom-in; transition: transform .25s var(--ease), border-color .25s; }
a.frame:hover { transform: translateY(-2px); border-color: rgba(15,23,42,.25); }
.is-dark a.frame:hover { border-color: rgba(255,255,255,.3); }
a.frame .zoom-hint { position: absolute; right: 10px; bottom: 10px; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; background: rgba(15,23,42,.72); color: #fff; opacity: 0; transition: opacity .2s; }
a.frame:hover .zoom-hint, a.frame:focus-visible .zoom-hint { opacity: 1; }
.zoom-hint svg { width: 14px; height: 14px; }

.cs-bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.cs-bento > * { min-width: 0; }
.span-4 { grid-column: span 4; } .span-5 { grid-column: span 5; } .span-6 { grid-column: span 6; } .span-7 { grid-column: span 7; } .span-8 { grid-column: span 8; } .span-12 { grid-column: span 12; }
.row-2 { grid-row: span 2; }
.cs-bento .cs-shot:not(.row-2) .frame { aspect-ratio: 1 / 1; display: grid; place-items: center; padding: 6px; }
.cs-bento .cs-shot:not(.row-2) .frame picture { display: contents; }
.cs-bento .cs-shot:not(.row-2) .frame img { width: auto; max-width: 100%; max-height: 100%; }
.cs-bento .cs-shot.row-2 .frame { height: 100%; display: grid; place-items: center; }
.cs-bento .cs-shot.row-2 { display: flex; flex-direction: column; }
.cs-bento .cs-shot.row-2 .frame { flex: 1; }

/* story: context / decision / outcome */
.cs-story { margin: 28px 0 0; display: grid; gap: 18px; max-width: var(--read); }
.cs-story div { display: grid; grid-template-columns: 96px 1fr; gap: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.is-dark .cs-story div { border-top-color: var(--line-dark); }
.cs-story dt { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); padding-top: 3px; }
.is-dark .cs-story dt { color: var(--muted-on-dark); }
.cs-story dd { margin: 0; font-size: 16px; line-height: 1.55; }
.cs-badge { display: inline-block; margin-left: 6px; padding: 0 7px; border: 1px solid currentColor; border-radius: 999px; font-size: 11px; letter-spacing: .04em; vertical-align: 2px; opacity: .75; white-space: nowrap; }

.cs-callouts { list-style: none; margin: 0; padding: 0; counter-reset: co; display: grid; gap: 18px; }
.cs-callouts li { counter-increment: co; display: grid; grid-template-columns: 32px 1fr; gap: 12px; }
.cs-callouts li::before { content: counter(co); width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; border: 1px solid currentColor; font-size: 13px; color: var(--navy); }
.is-dark .cs-callouts li::before { color: var(--teal); }
.cs-callouts b { display: block; }
.cs-callouts span { font-size: 15px; color: var(--text-muted); }
.is-dark .cs-callouts span { color: var(--muted-on-dark); }

.cs-pair { display: flex; align-items: center; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 28px; font-size: 14px; }
.cs-pair span { padding: 6px 12px; border: 1px solid var(--line-dark); border-radius: 999px; }
.cs-pair .shared { background: rgba(97,199,205,.14); border-color: rgba(97,199,205,.5); color: #fff; }

/* ───────── principles ───────── */
.cs-principles { list-style: none; margin: 0; padding: 0; counter-reset: pr; }
.cs-principle { counter-increment: pr; display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 48px; padding: 40px 0; border-top: 1px solid var(--line); }
.cs-principle:last-child { border-bottom: 1px solid var(--line); }
.cs-principle h3 { margin: 0; font-size: clamp(22px, 2.2vw, 28px); line-height: 1.15; letter-spacing: -.02em; }
.cs-principle h3::before { content: counter(pr, decimal-leading-zero); display: block; margin-bottom: 10px; font-size: 13px; font-weight: 500; color: var(--text-muted); letter-spacing: .08em; }
.cs-principle dl { margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 32px; }
.cs-principle dt { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); }
.cs-principle dd { margin: 4px 0 0; font-size: 16px; line-height: 1.5; }

/* ───────── design-system cards ───────── */
.cs-card { border-radius: var(--radius); padding: 24px; background: rgba(255,255,255,.04); border: 1px solid var(--line-dark); }
.cs-card h3 { margin: 0 0 6px; font-size: 20px; letter-spacing: -.01em; }
.cs-card p { margin: 0 0 12px; font-size: 15px; color: var(--muted-on-dark); }
.cs-kind { display: inline-block; margin-bottom: 14px; padding: 2px 9px; border-radius: 999px; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; border: 1px solid var(--line-dark); color: var(--muted-on-dark); }
.cs-kind.prod { border-color: rgba(97,199,205,.5); color: var(--teal); }
.cs-surface { background: #fff; color: var(--text); border-radius: 12px; padding: 16px; }
.cs-type-big { font-size: 40px; line-height: 1.05; font-weight: 500; letter-spacing: -.02em; color: #101828; }
.cs-type-row { display: flex; flex-wrap: wrap; gap: 4px 18px; margin-top: 8px; font-size: 15px; }
.cs-type-alpha { margin-top: 6px; font-size: 14px; color: #475467; word-break: break-all; }
.cs-tokens { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.cs-tokens li { display: flex; align-items: center; gap: 10px; font-size: 13px; line-height: 1.3; color: var(--text-on-dark); }
.cs-tokens .sw { flex: 0 0 36px; height: 36px; border-radius: 8px; border: 1px solid rgba(255,255,255,.25); }
.cs-tokens small { display: block; color: var(--muted-on-dark); font-family: ui-monospace, Menlo, monospace; font-size: 12px; }
.cs-schemes { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.cs-scheme { border-radius: 12px; padding: 14px; font-size: 13px; }
.cs-scheme .btn { display: inline-block; margin-top: 10px; padding: 6px 12px; border-radius: 6px; font-weight: 700; }
.cs-scheme.light { background: #FAFAFA; color: #1E3A5F; }
.cs-scheme.light .btn { background: #1E3A5F; color: #FAFAFA; }
.cs-scheme.dark { background: #0F172A; color: #A8C4E8; border: 1px solid rgba(168,196,232,.3); }
.cs-scheme.dark .btn { background: #A8C4E8; color: #0F172A; }
.cs-states { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.cs-states li { padding: 4px 12px; border-radius: 999px; border: 1px solid rgba(15,23,42,.2); font-size: 13px; background: #fff; color: var(--text); }
.cs-money { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; align-items: baseline; margin: 0; }
.cs-money dt { font-family: ui-monospace, Menlo, monospace; font-size: 12px; color: var(--text-muted); }
.cs-money dd { margin: 0; font-weight: 700; font-variant-numeric: tabular-nums; }
.cs-money dd.kpi { font-size: 28px; letter-spacing: -.02em; }

.cs-density-switch { display: inline-flex; border: 1px solid rgba(15,23,42,.2); border-radius: 999px; padding: 3px; margin-bottom: 12px; background: #F2F4F7; }
.cs-density-switch button { min-height: 36px; padding: 0 14px; border: 0; border-radius: 999px; background: transparent; font: 500 14px var(--font); color: var(--text); cursor: pointer; }
.cs-density-switch button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.cs-rows { list-style: none; margin: 0; padding: 0; border: 1px solid rgba(15,23,42,.12); border-radius: 10px; overflow: hidden; }
.cs-rows li { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px; border-top: 1px solid rgba(15,23,42,.08); transition: padding .2s var(--ease); }
.cs-rows li:first-child { border-top: 0; }
.cs-rows .t { font-weight: 500; }
.cs-rows .m { color: var(--text-muted); font-size: 12px; }
.cs-rows .chip { font-size: 11px; padding: 1px 8px; border: 1px solid rgba(15,23,42,.25); border-radius: 999px; }
.cs-rows[data-density="comfortable"] li { padding: 14px; font-size: 16px; }
.cs-rows[data-density="compact"] li { padding: 5px 10px; font-size: 13px; }
.cs-rows[data-density="compact"] .m { display: none; }

.cs-phone { position: relative; width: 150px; height: 260px; margin: 0 auto; border: 1px solid rgba(15,23,42,.2); border-radius: 22px; background: #fff; overflow: hidden; }
.cs-phone .scrim { position: absolute; inset: 0; background: rgba(16,24,40,.38); }
.cs-phone .sheet { position: absolute; left: 0; right: 0; bottom: 0; height: 58%; background: #fff; border-radius: 16px 16px 0 0; padding: 8px 12px; font-size: 11px; color: var(--text); }
.cs-phone .handle { width: 32px; height: 4px; border-radius: 2px; background: #c8ccd1; margin: 0 auto 8px; }
.cs-phone .line { height: 8px; border-radius: 3px; background: #EAECF0; margin: 7px 0; }
.cs-phone .line.short { width: 60%; }

.cs-bigstat { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.cs-bigstat b { font-size: 56px; line-height: 1; letter-spacing: -.04em; color: #fff; }

/* ───────── outcomes ───────── */
.cs-outcomes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
.cs-outcomes li { padding: 28px 28px 28px 0; border-bottom: 1px solid var(--line); }
.cs-outcomes li:not(:nth-child(3n+1)) { padding-left: 28px; border-left: 1px solid var(--line); }
.cs-outcomes .v { display: block; font-size: clamp(36px, 4vw, 52px); font-weight: 700; letter-spacing: -.035em; line-height: 1; }
.cs-outcomes .l { display: block; margin-top: 10px; font-weight: 500; }
.cs-outcomes .a { display: block; margin-top: 6px; font-size: 14px; color: var(--text-muted); }

.cs-timeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 0; border-top: 2px solid var(--ink); }
.cs-timeline li { padding: 14px 12px 0 0; position: relative; font-size: 14px; line-height: 1.4; }
.cs-timeline li::before { content: ""; position: absolute; top: -7px; left: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--ink); border: 2px solid var(--paper); }
.cs-timeline li.target::before { background: var(--paper); border: 2px dashed var(--ink); }
.cs-timeline time { display: block; font-weight: 700; font-variant-numeric: tabular-nums; }
.cs-timeline span { color: var(--text-muted); font-size: 13px; }

/* ───────── horizontal rail (social posts) ───────── */
.cs-rail-wrap { position: relative; }
.cs-rail { list-style: none; margin: 0; padding: 4px 0 16px; display: grid; grid-auto-flow: column; grid-auto-columns: 260px; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.3) transparent; }
.cs-rail li { scroll-snap-align: start; }
.cs-rail img { border-radius: 12px; width: 100%; height: auto; }
.cs-rail-controls { display: flex; gap: 8px; justify-content: flex-end; margin-bottom: 16px; }
.cs-rail-controls button { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-dark); background: transparent; color: #fff; cursor: pointer; font-size: 18px; }
.cs-rail-controls button:hover { border-color: #fff; }

/* ───────── closing ───────── */
.cs-cta { text-align: center; }
.cs-cta .cs-h2 { margin: 0 auto; }
.cs-cta .cs-lede { margin-left: auto; margin-right: auto; }
.cs-cta .cs-actions { justify-content: center; }
.cs-pn { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center; padding: 28px 0; border-top: 1px solid var(--line); font-size: 15px; }
.cs-pn a { color: var(--text); text-decoration: none; display: inline-flex; flex-direction: column; min-height: 44px; justify-content: center; }
.cs-pn a small { color: var(--text-muted); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.cs-pn a b { font-size: 20px; letter-spacing: -.01em; }
.cs-pn a:hover b { text-decoration: underline; }
.cs-pn .next { text-align: right; justify-self: end; }
.cs-pn .all { padding: 0 18px; border: 1px solid var(--line); border-radius: 999px; }
.cs-refs { font-size: 13px; color: var(--text-muted); padding: 24px 0 8px; border-top: 1px solid var(--line); }
.cs-refs h2 { font-size: 13px; letter-spacing: .1em; text-transform: uppercase; margin: 0 0 8px; color: var(--text); }
.cs-refs ol { margin: 0; padding-left: 20px; }
.site-footer { border-top: 1px solid var(--line); padding: 20px 0 40px; font-size: 13px; color: var(--text-muted); }
.site-footer p { margin: 0 0 6px; }
.site-footer ul { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; }
.site-footer a { color: var(--link); }

/* ───────── lightbox ───────── */
.cs-lightbox { border: 0; padding: 0; background: transparent; max-width: min(1100px, 94vw); max-height: 92vh; overflow: visible; }
.cs-lightbox::backdrop { background: rgba(10,15,28,.86); }
.cs-lightbox figure { margin: 0; }
.cs-lightbox img { max-height: 80vh; width: auto; max-width: 100%; margin: 0 auto; background: #fff; border-radius: 12px; }
.cs-lightbox figcaption { color: #E2E8F0; text-align: center; font-size: 14px; margin-top: 10px; }
.cs-lightbox .close { position: absolute; top: -52px; right: 0; width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255,255,255,.4); background: transparent; color: #fff; font-size: 22px; cursor: pointer; }

/* ───────── reveal on scroll (only when JS is running) ───────── */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .js .reveal.is-in { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  a.frame, .cs-btn, .cs-rows li { transition: none; }
}

/* ───────── responsive ───────── */
@media (max-width: 1000px) {
  .cs-section { padding: 88px 0; }
  .cs-split, .cs-split.even { grid-template-columns: 1fr; gap: 40px; }
  .cs-split.reverse > :first-child { order: 0; }
  .cs-lifecycle { grid-template-columns: repeat(4, minmax(0, 1fr)); row-gap: 32px; }
  .cs-lifecycle li:nth-child(4)::after { display: none; }
  .cs-principle { grid-template-columns: 1fr; gap: 20px; }
  .cs-bento .span-4, .cs-bento .span-5, .cs-bento .span-7 { grid-column: span 6; }
  .cs-bento .span-8 { grid-column: span 12; }
  .cs-outcomes { grid-template-columns: repeat(2, 1fr); }
  .cs-outcomes li:not(:nth-child(3n+1)) { padding-left: 0; border-left: 0; }
  .cs-outcomes li:nth-child(even) { padding-left: 28px; border-left: 1px solid var(--line); }
  .cs-timeline { grid-template-columns: repeat(4, minmax(0, 1fr)); row-gap: 28px; }
  .cs-stage { height: 460px; }
  .cs-metrics ul { grid-template-columns: repeat(2, 1fr); }
  .cs-metrics li:nth-child(3) { padding-left: 0; border-left: 0; }
}
@media (max-width: 760px) {
  :root { --gutter: 16px; }
  body { font-size: 16px; }
  .top-nav { display: none; }
  .menu-btn { display: inline-flex; }
  .brand-words { display: none; }
  .cs-section { padding: 72px 0; }
  .cs-section-head { margin-bottom: 36px; }
  .cs-hero { padding-top: 40px; }
  .cs-meta { grid-template-columns: 1fr 1fr; gap: 16px 20px; }
  .cs-stage { height: auto; margin-top: 48px; }
  .cs-stage figure.main { position: relative; left: auto; transform: none; width: 100%; }
  .cs-stage .side { display: none; }
  .cs-stage::after { height: 60px; }
  .cs-metrics { padding-bottom: 72px; }
  .cs-metrics li, .cs-metrics li + li { padding: 22px 12px 0 0; border-left: 0; }
  .cs-frag { grid-template-columns: 1fr; }
  .cs-frag-arrow { transform: rotate(90deg); justify-self: center; }
  .cs-lifecycle { grid-template-columns: 1fr; row-gap: 0; }
  .cs-lifecycle li { padding: 0 0 24px 52px; min-height: 34px; }
  .cs-lifecycle li::after, .cs-lifecycle li:nth-child(4)::after { display: block; top: 34px; left: 16px; right: auto; bottom: 0; width: 2px; height: auto; background: repeating-linear-gradient(180deg, var(--teal) 0 6px, transparent 6px 10px); }
  .cs-lifecycle li:last-child::after { display: none; }
  .cs-bento { grid-template-columns: 1fr; }
  .cs-bento > * { grid-column: auto !important; grid-row: auto !important; }
  .cs-story div { grid-template-columns: 1fr; gap: 4px; }
  .cs-principle dl { grid-template-columns: 1fr; }
  .cs-schemes, .cs-tokens { grid-template-columns: 1fr; }
  .cs-outcomes { grid-template-columns: 1fr; }
  .cs-outcomes li, .cs-outcomes li:nth-child(even) { padding: 24px 0; border-left: 0; }
  .cs-timeline { grid-template-columns: 1fr; border-top: 0; border-left: 2px solid var(--ink); row-gap: 18px; padding-left: 18px; }
  .cs-timeline li { padding: 0; }
  .cs-timeline li::before { top: 4px; left: -26px; }
  .cs-rail { grid-auto-columns: 74%; }
  .cs-pn { grid-template-columns: 1fr 1fr; }
  .cs-pn .all { grid-column: 1 / -1; grid-row: 2; justify-self: center; }
}

/* ───────── motion layer (all of it is skipped under reduced motion) ───────── */
@property --cs-angle { syntax: "<angle>"; inherits: false; initial-value: 0deg; }

.cs-btn.primary:hover, .cs-btn.primary:focus-visible { box-shadow: 0 0 0 1px rgba(255,255,255,.6), 0 10px 34px -6px rgba(97,199,205,.55); }
.cs-btn.dark:hover, .cs-btn.dark:focus-visible { box-shadow: 0 10px 30px -8px rgba(15,23,42,.55); }

/* cursor spotlight: a soft fill on cards, a glowing border on cards and dark screenshots */
.cs-card, .cs-record, .is-dark a.frame { position: relative; }
.cs-card > *, .cs-record > * { position: relative; z-index: 1; }
.cs-card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; z-index: 0;
  background: radial-gradient(440px circle at var(--mx, 50%) var(--my, 50%), rgba(97,199,205,.11), transparent 45%);
  opacity: 0; transition: opacity .35s;
}
.cs-card::after, .is-dark a.frame::after {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none; z-index: 2;
  background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 50%), rgba(168,196,232,.85), rgba(97,199,205,.35) 30%, transparent 55%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  opacity: 0; transition: opacity .35s;
}
.cs-card.is-lit::before, .cs-card.is-lit::after, .is-dark a.frame.is-lit::after { opacity: 1; }

@media (prefers-reduced-motion: no-preference) {
  /* headline words */
  .cs-headline .w { display: inline-block; animation: csWord .9s var(--ease) both; animation-delay: calc(.15s + var(--i) * 55ms); }
  @keyframes csWord { from { opacity: 0; transform: translateY(.4em); filter: blur(8px); } to { opacity: 1; transform: none; filter: none; } }

  /* hero parallax on decorative layers only */
  .cs-stage .side, .cs-stage .glow { will-change: transform; }
  .js .cs-stage .side { translate: calc(var(--px, 0) * 1px) calc(var(--py, 0) * 1px); }
  .js .cs-stage .glow { translate: calc(var(--gx, 0) * 1px) calc(var(--gy, 0) * 1px); }

  /* staggered children */
  .js .reveal[data-stagger] { opacity: 1; transform: none; }
  .js [data-stagger] > * { opacity: 0; translate: 0 18px; transition: opacity .6s var(--ease), translate .6s var(--ease); transition-delay: calc(var(--i, 0) * 70ms); }
  .js [data-stagger].is-in > * { opacity: 1; translate: none; }

  /* lifecycle: nodes pop, connectors draw in sequence */
  .js .cs-lifecycle li::before { transform: scale(.3); opacity: 0; transition: transform .45s var(--ease), opacity .3s; transition-delay: calc(var(--i, 0) * 110ms); }
  .js .cs-lifecycle li::after { transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease); transition-delay: calc(var(--i, 0) * 110ms + 180ms); }
  .js .cs-lifecycle.is-in li::before { transform: none; opacity: 1; }
  .js .cs-lifecycle.is-in li::after { transform: none; }

  /* one-time border sweep on the "one project record" card */
  .cs-record::before {
    content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1.5px; pointer-events: none; z-index: 2; opacity: 0;
    background: conic-gradient(from var(--cs-angle), transparent 0 62%, var(--teal) 80%, var(--sky) 90%, transparent 100%);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor;
    mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0);
  }
  .is-in .cs-record::before { animation: csSweep 3.2s var(--ease) .4s 1 both; }
  @keyframes csSweep { 0% { --cs-angle: 0deg; opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { --cs-angle: 720deg; opacity: 0; } }

  .is-dark a.frame:hover { transform: translateY(-3px); }
}
@media (max-width: 760px) and (prefers-reduced-motion: no-preference) {
  .js .cs-lifecycle li::after, .js .cs-lifecycle li:nth-child(4)::after { transform: scaleY(0); transform-origin: top; }
  .js .cs-lifecycle.is-in li::after { transform: none; }
}