/* Cloud Agentics website styles. Tokens come from tokens.css. */

  * { box-sizing: border-box; }
  html { background: var(--ca-bg); scroll-behavior: smooth; }
  body { margin: 0; background: var(--ca-bg); color: var(--ca-ink); font: 400 15px/1.55 var(--ca-text); -webkit-font-smoothing: antialiased; }
  a { color: var(--ca-cyan); text-decoration: none; }
  a:hover, a:focus-visible { text-decoration: underline; text-underline-offset: 3px; }
  :focus-visible { outline: 1px solid var(--ca-cyan); outline-offset: 4px; }
  img { display: block; max-width: 100%; }
  h1, h2, h3, h4 { font-family: var(--ca-display); font-weight: 600; letter-spacing: -.01em; margin: 0; }
  p { margin: 0; }
  ul { margin: 0; padding: 0; list-style: none; }
  .wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
  .num { font-variant-numeric: tabular-nums; }

  /* buttons */
  .btn { display: inline-block; padding: 11px 18px; font: 600 14px var(--ca-display); color: var(--ca-ink); border: 1px solid var(--ca-accent); background: color-mix(in srgb, var(--ca-accent) 6%, transparent); text-decoration: none; cursor: pointer; transition: background .18s, box-shadow .18s; }
  .btn:hover, .btn:focus-visible { background: color-mix(in srgb, var(--ca-accent) 16%, transparent); box-shadow: 0 0 20px color-mix(in srgb, var(--ca-accent) 25%, transparent); text-decoration: none; }
  .btn.quiet { border-color: var(--ca-line); background: transparent; }
  .btn.quiet:hover, .btn.quiet:focus-visible { border-color: var(--ca-accent); background: color-mix(in srgb, var(--ca-accent) 6%, transparent); box-shadow: none; }

  /* header */
  .top { position: sticky; top: 0; z-index: 10; background: rgba(5,7,13,.82); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--ca-line); }
  .top .wrap { display: flex; align-items: center; gap: 32px; height: 64px; }
  .lockup { display: flex; align-items: center; gap: 11px; color: var(--ca-ink); font: 600 17px var(--ca-display); }
  .lockup:hover, .lockup:focus-visible { text-decoration: none; }
  .lockup svg { width: 28px; height: 28px; flex: none; filter: drop-shadow(0 0 6px rgba(46,242,255,.35)); }
  .nav { display: flex; gap: 24px; margin-left: auto; }
  .nav a { color: var(--ca-soft); font: 500 14px var(--ca-display); }
  .nav a:hover, .nav a:focus-visible { color: var(--ca-ink); text-decoration: none; }
  .top .btn { padding: 9px 14px; }
  .menu { display: none; margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--ca-line); background: transparent; color: var(--ca-ink); cursor: pointer; }
  .menu svg { width: 20px; height: 20px; }

  /* sections */
  section { padding: 96px 0; border-top: 1px solid var(--ca-line); }
  .kicker { display: flex; align-items: center; gap: 10px; font: 600 13px var(--ca-display); color: var(--ca-accent); margin-bottom: 16px; }
  .kicker::after { content: ''; width: 28px; height: 1px; background: var(--ca-accent); opacity: .6; }
  h2 { font-size: 40px; line-height: 1; }
  .lead { font: 500 18px/1.4 var(--ca-display); color: var(--ca-soft); max-width: 60ch; margin-top: 16px; }
  .intro { max-width: 760px; margin-bottom: 48px; }
  .intro p.text { color: var(--ca-soft); max-width: 70ch; margin-top: 16px; }

  /* hero: the live platform view is the page itself, not a framed item */
  .hero { border-top: 0; padding: 0; position: relative; min-height: min(calc(100vh - 64px), 920px); min-height: min(calc(100svh - 64px), 920px); display: grid; align-items: center; overflow: hidden; }
  .scene { position: absolute; inset: 0; z-index: 0; }
  .scene iframe { width: 100%; height: 100%; border: 0; display: block; }
  .scene picture, .scene img { width: 100%; height: 100%; object-fit: cover; object-position: 68% 50%; }
  .scene::before { content: ''; position: absolute; inset: 0; background: linear-gradient(to right, rgba(5,7,13,.86) 0%, rgba(5,7,13,.6) 45%, transparent 70%); pointer-events: none; }
  .scene::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 180px; background: linear-gradient(to bottom, transparent, var(--ca-bg)); pointer-events: none; }
  .hero .wrap { position: relative; z-index: 1; width: 100%; padding-top: 72px; padding-bottom: 96px; }
  .hero .copy { max-width: 520px; }
  .sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
  .hero h1 { font-size: clamp(40px, 4.8vw, 74px); line-height: .98; letter-spacing: -.02em; text-shadow: -1px 0 rgba(255,61,203,.45), 1px 0 rgba(46,242,255,.45), 0 2px 24px rgba(5,7,13,.9); }
  .hero .text { font-size: 17px; color: var(--ca-soft); max-width: 42ch; margin-top: 24px; text-shadow: 0 1px 12px rgba(5,7,13,.9); }
  .hero .acts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
  #services { border-top: 0; }
  .hero .cap { position: absolute; right: 24px; bottom: 12px; z-index: 1; display: flex; gap: 16px; align-items: center; font-size: 13px; color: var(--ca-muted); }
  .hero .cap a { display: inline-block; padding: 12px 0; }

  /* panels */
  .ca-panel { position: relative; padding: 28px 28px 26px; }
  .ca-panel::before { content: ''; position: absolute; left: -2px; top: 24px; bottom: 24px; width: 2px; background: var(--ca-accent); box-shadow: 0 0 14px var(--ca-accent); }
  .ca-panel { border-left-color: transparent; }
  .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
  .svc h3 { font-size: 26px; line-height: 1.1; }
  .svc .q { font: 500 17px/1.35 var(--ca-display); color: var(--ca-accent); margin: 8px 0 14px; }
  .svc p { color: var(--ca-soft); max-width: 52ch; font-size: 14px; }
  .svc li { font-size: 14px; }
  .svc ul { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--ca-line); display: grid; gap: 10px; }
  .svc li { position: relative; padding-left: 18px; color: var(--ca-soft); }
  .svc li::before { content: ''; position: absolute; left: 0; top: 10px; width: 8px; height: 1px; background: var(--ca-accent); }
  .svc .btn { margin-top: 24px; }

  /* layer panel: number, rule, role, name, question, paragraph, three figures */
  .meta { display: flex; align-items: center; gap: 10px; font: 600 13px var(--ca-display); }
  .meta .n { color: var(--ca-accent); font-variant-numeric: tabular-nums; }
  .meta .rule { width: 28px; height: 1px; background: var(--ca-accent); opacity: .6; }
  .meta .role { color: var(--ca-muted); letter-spacing: .04em; font-weight: 500; }
  .layer h3 { font-size: 40px; line-height: 1; margin-top: 10px; }
  .layer .q { font: 500 18px var(--ca-display); color: var(--ca-accent); margin: 4px 0 12px; }
  .layer p { color: var(--ca-soft); max-width: 46ch; }
  .figs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--ca-line); }
  .figs div { margin: 0; }
  .figs dt { font: 600 28px/1 var(--ca-display); color: var(--ca-ink); font-variant-numeric: tabular-nums; }
  .figs dd { margin: 6px 0 0; font-size: 12px; line-height: 1.35; color: var(--ca-muted); }
  .rows { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--ca-line); display: grid; gap: 8px; font-size: 14px; }
  .rows div { display: grid; grid-template-columns: 92px 1fr; gap: 12px; }
  .rows b { font: 600 13px var(--ca-display); color: var(--ca-ink); }
  .rows span { color: var(--ca-soft); }
  .layer .open { display: inline-block; margin-top: 10px; padding: 10px 0; min-height: 44px; font: 600 13px var(--ca-display); color: var(--ca-accent); }

  /* steps: a sequence, so they are numbered */
  .step { padding: 24px; border: 1px solid var(--ca-line); background: var(--ca-surface); }
  .step .meta { margin-bottom: 14px; }
  .step h3 { font-size: 22px; line-height: 1.1; }
  .step p { color: var(--ca-soft); margin-top: 10px; }

  /* case studies */
  .case { color: inherit; text-decoration: none; transition: border-color .18s; }
  .case:hover, .case:focus-visible { text-decoration: none; border-color: var(--ca-cyan); }
  .case { padding: 24px; background: var(--ca-panel); border: 1px solid var(--ca-line); clip-path: polygon(0 0, calc(100% - var(--ca-chamfer)) 0, 100% var(--ca-chamfer), 100% 100%, 0 100%); display: flex; flex-direction: column; }
  .case .case-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 14px; }
  .case .when { font: 500 12px var(--ca-display); color: var(--ca-muted); }
  .case .chips { margin-top: 14px; }
  .case .read { margin-top: 16px; font: 600 13px var(--ca-display); color: var(--ca-cyan); }
  .case:hover .read { text-decoration: underline; text-underline-offset: 3px; }
  .case h3 { font-size: 22px; line-height: 1.15; margin-top: 8px; }
  .case p { color: var(--ca-soft); margin-top: 10px; font-size: 14px; flex: 1; }
  .case .figs { gap: 8px; }
  .case .figs dt { font-size: 24px; white-space: nowrap; }

  /* certifications */
  .certs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
  .cert { display: grid; grid-template-columns: 56px 1fr; gap: 12px; align-items: center; padding: 14px; border: 1px solid var(--ca-line); background: var(--ca-surface); }
  .cert img { width: 56px; height: 56px; object-fit: contain; }
  .cert b { display: block; font: 600 13px/1.25 var(--ca-display); color: var(--ca-ink); }
  .cert span { display: block; font-size: 12px; color: var(--ca-muted); margin-top: 4px; }

  /* demo versions */
  .demo { padding: 24px; border: 1px solid var(--ca-line); background: var(--ca-surface); }
  .demo .meta { margin-bottom: 10px; }
  .demo h3 { font-size: 22px; }
  .demo p { color: var(--ca-soft); margin-top: 10px; font-size: 14px; min-height: 4.6em; }
  .demo .links { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 16px; font: 600 13px var(--ca-display); }

  /* contact */
  .contact .wrap { display: grid; grid-template-columns: 5fr 7fr; gap: 48px; }
  .contact .text { color: var(--ca-soft); max-width: 44ch; margin-top: 16px; }
  .details { margin-top: 32px; display: grid; gap: 16px; }
  .details div { display: grid; grid-template-columns: 96px 1fr; gap: 12px; padding-top: 12px; border-top: 1px solid var(--ca-line); }
  .details b { font: 600 13px var(--ca-display); color: var(--ca-muted); }
  .details span { color: var(--ca-ink); }
  form { padding: 28px; background: var(--ca-panel); border: 1px solid var(--ca-line); clip-path: polygon(0 0, calc(100% - var(--ca-chamfer)) 0, 100% var(--ca-chamfer), 100% 100%, 0 100%); }
  .f2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .field { display: grid; gap: 6px; margin-bottom: 16px; }
  label { font: 600 13px var(--ca-display); color: var(--ca-soft); }
  input, select, textarea { width: 100%; padding: 10px 12px; font: 400 15px var(--ca-text); color: var(--ca-ink); background: var(--ca-bg); border: 1px solid var(--ca-line); border-radius: 0; }
  input:focus, select:focus, textarea:focus { outline: 1px solid var(--ca-cyan); outline-offset: 0; border-color: var(--ca-cyan); }
  select { appearance: none; -webkit-appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ca-muted) 50%), linear-gradient(135deg, var(--ca-muted) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
  textarea { min-height: 120px; resize: vertical; }
  .note { font-size: 12px; color: var(--ca-muted); margin-top: 12px; }
  .sent, .fail { display: none; margin-top: 16px; padding: 12px 16px; border: 1px solid var(--ca-line); border-left: 2px solid var(--ca-teal); color: var(--ca-soft); }
  .fail { border-left-color: var(--ca-red); }
  form.is-sent .sent { display: block; } form.is-sent .fields, form.is-sent .note { display: none; }
  form.is-fail .fail { display: block; }

  /* footer */
  footer { border-top: 1px solid var(--ca-line); padding: 48px 0; color: var(--ca-muted); font-size: 13px; }
  footer .wrap { display: grid; grid-template-columns: 1fr auto; gap: 24px 48px; align-items: start; }
  footer .lockup { margin-bottom: 12px; }
  footer p { max-width: 60ch; }
  footer ul { display: flex; flex-wrap: wrap; gap: 0 20px; font: 500 13px var(--ca-display); }
  footer li a { display: inline-block; padding: 12px 0; }
  footer li a { color: var(--ca-soft); }

  /* one entrance per section, 600 ms */
  .rise > * { opacity: 0; transform: translateY(12px); transition: opacity .6s var(--ca-ease-enter), transform .6s var(--ca-ease-enter); }
  .rise.in > * { opacity: 1; transform: none; }
  .rise.in > :nth-child(2) { transition-delay: 70ms; } .rise.in > :nth-child(3) { transition-delay: 140ms; } .rise.in > :nth-child(4) { transition-delay: 210ms; } .rise.in > :nth-child(5) { transition-delay: 280ms; }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .rise > * { opacity: 1; transform: none; transition: none; }
    .btn, .lockup svg { transition: none; }
  }

  @media (max-width: 960px) {
    .hero .wrap, .contact .wrap { grid-template-columns: 1fr; }
    .grid4, .grid3 { grid-template-columns: 1fr 1fr; }
    .certs { grid-template-columns: repeat(3, 1fr); }
    .layer h3 { font-size: 32px; }
  }
  @media (max-width: 720px) {
    .wrap { padding: 0 16px; }
    section { padding: 64px 0; }
    .hero { min-height: 0; display: flex; flex-direction: column; }
    .hero .wrap { order: 0; } .scene { order: 1; } .hero .cap { order: 2; }
    .hero .wrap { padding-top: 40px; padding-bottom: 0; }
    .scene { position: relative; inset: auto; aspect-ratio: 16 / 8; margin-top: 24px; }
    .scene::after { height: 120px; }
    .scene::before { inset: auto; left: 0; right: 0; top: 0; height: 80px; background: linear-gradient(to top, transparent, var(--ca-bg)); pointer-events: none; }
    .hero .cap { position: static; padding: 0 16px; justify-content: space-between; }
    h2 { font-size: 32px; }
    .nav, .top .btn { display: none; }
    .menu { display: grid; place-items: center; }
    .top.open .nav { display: grid; position: absolute; left: 0; right: 0; top: 64px; padding: 16px; gap: 16px; background: var(--ca-bg); border-bottom: 1px solid var(--ca-line); }
    .grid2, .grid3, .grid4, .f2 { grid-template-columns: 1fr; }
    .certs { grid-template-columns: 1fr 1fr; }
    .cert { grid-template-columns: 44px 1fr; } .cert img { width: 44px; height: 44px; }
    .ca-panel { padding: 22px 20px 20px; }
    .layer h3 { font-size: 28px; }
    .figs dt { font-size: 24px; }
    .rows div, .details div { grid-template-columns: 1fr; gap: 2px; }
    form { padding: 20px 16px; }
    footer .wrap { grid-template-columns: 1fr; }
  }

  /* ---------- article pages: /work/<slug>/ ---------- */
  .article { padding: 72px 0 96px; border-top: 0; }
  .article .wrap { max-width: 1000px; }
  .article .head { max-width: 760px; margin-bottom: 48px; }
  .article h1 { font-size: clamp(34px, 4vw, 52px); line-height: 1.02; letter-spacing: -.02em; }
  .article .lead { margin-top: 20px; }
  .article .head .figs { grid-template-columns: repeat(4, 1fr); margin-top: 32px; }
  .article .head .figs dt { font-size: 32px; }
  .article .body > * + * { margin-top: 24px; }
  .article .body > h2 { font-size: 28px; line-height: 1.1; margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--ca-line); max-width: 760px; }
  .article .body > h3 { font-size: 20px; line-height: 1.2; margin-top: 40px; max-width: 760px; }
  .article .body > p { color: var(--ca-soft); max-width: 70ch; }
  .article .body > p.q { font: 500 18px/1.4 var(--ca-display); color: var(--ca-accent); }
  .article .body strong { font-weight: 600; color: var(--ca-ink); }
  .dash { display: grid; gap: 10px; max-width: 70ch; }
  .dash li { position: relative; padding-left: 18px; color: var(--ca-soft); }
  .dash li::before { content: ''; position: absolute; left: 0; top: 11px; width: 8px; height: 1px; background: var(--ca-accent); }
  .box { padding: 24px; border: 1px solid var(--ca-line); background: var(--ca-surface); }
  .box h3, .box h4 { font-size: 18px; line-height: 1.2; margin: 0 0 12px; }
  .box p, .box li { font-size: 14px; }
  .box .dash { gap: 8px; }
  .box .meta { margin-bottom: 12px; }
  .before { --ca-accent: var(--ca-red); } .after { --ca-accent: var(--ca-teal); }
  .callout { padding: 24px 28px; }
  .callout h3 { font-size: 20px; margin: 0 0 8px; }
  .callout p { color: var(--ca-soft); max-width: 60ch; }
  .tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
  .tbl th { text-align: left; padding: 10px 12px; font: 600 13px var(--ca-display); color: var(--ca-ink); background: var(--ca-panel); border-bottom: 1px solid var(--ca-line); }
  .tbl td { padding: 10px 12px; border-bottom: 1px solid var(--ca-line); color: var(--ca-soft); vertical-align: top; }
  .tbl td.num, .tbl th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
  .tbl td:first-child { color: var(--ca-ink); }
  .flow { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 12px; align-items: stretch; }
  .flow .box { position: relative; }
  .flow .box + .box::before { content: ''; position: absolute; left: -12px; top: 50%; width: 12px; height: 1px; background: var(--ca-accent); }
  .wide { max-width: none; }
  .article .next { margin-top: 64px; }
  .article .next h2 { font-size: 28px; margin: 0 0 8px; }
  .article .next p { color: var(--ca-soft); max-width: 60ch; }
  .article .next .btn { margin-top: 20px; }
  .crumbs { font: 500 13px var(--ca-display); color: var(--ca-muted); margin-bottom: 24px; }
  .crumbs a { color: var(--ca-muted); }
  .more { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--ca-line); }
  .more h2 { font-size: 20px; margin-bottom: 16px; }
  .more ul { display: grid; gap: 8px; font: 600 14px var(--ca-display); }
  @media (max-width: 720px) {
    .article { padding: 40px 0 64px; }
    .article .head .figs { grid-template-columns: 1fr 1fr; }
    .article .body > h2 { font-size: 24px; margin-top: 48px; }
    .flow { grid-auto-flow: row; grid-auto-columns: auto; }
    .flow .box + .box::before { left: 50%; top: -12px; width: 1px; height: 12px; }
    .tbl { display: block; overflow-x: auto; }
  }
  .article h2.sub { font-size: 20px; margin: 48px 0 16px; }
  .article h2.sub:first-of-type { margin-top: 0; }

  /* ---------- diagram components for the work pages ---------- */
  /* tint: a translucent accent for zones, chips and tiles. data-tint sets it; default is the page accent */
  [data-tint="cyan"] { --tint: var(--ca-cyan); } [data-tint="magenta"] { --tint: var(--ca-magenta); } [data-tint="violet"] { --tint: var(--ca-violet); }
  [data-tint="red"] { --tint: var(--ca-red); } [data-tint="orange"] { --tint: var(--ca-orange); } [data-tint="teal"] { --tint: var(--ca-teal); }
  [data-tint="blue"] { --tint: var(--ca-blue); } [data-tint="green"] { --tint: var(--ca-green); } [data-tint="muted"] { --tint: var(--ca-muted); }
  .article { --tint: var(--ca-accent); }

  /* section heading with an icon square */
  .article .body > h2 { display: flex; align-items: center; gap: 14px; }
  .ic { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; flex: none; }
  .icbox { display: inline-grid; place-items: center; width: 36px; height: 36px; flex: none; color: var(--tint); border: 1px solid color-mix(in srgb, var(--tint) 45%, transparent); background: color-mix(in srgb, var(--tint) 10%, transparent); }
  .icbox .ic { width: 20px; height: 20px; }

  /* diagram frame: a labelled plate with the faint floor grid */
  .diagram { position: relative; padding: 48px 24px 24px; border: 1px solid var(--ca-line); background: var(--ca-surface);
    background-image: linear-gradient(var(--ca-line) 1px, transparent 1px), linear-gradient(90deg, var(--ca-line) 1px, transparent 1px); background-size: 24px 24px; background-position: 0 0;
    clip-path: polygon(0 0, calc(100% - var(--ca-chamfer)) 0, 100% var(--ca-chamfer), 100% 100%, 0 100%); }
  .diagram::before { content: attr(data-label); position: absolute; left: 24px; top: 16px; font: 600 12px var(--ca-display); color: var(--ca-muted); letter-spacing: .04em; }
  .diagram > * + * { margin-top: 16px; }

  /* nodes: one resource each */
  .node { display: inline-flex; align-items: center; gap: 8px; padding: 7px 11px 7px 9px; background: var(--ca-panel); border: 1px solid var(--ca-line); border-left: 2px solid var(--tint); font: 600 13px var(--ca-display); color: var(--ca-ink); white-space: nowrap; }
  .node img { width: 18px; height: 18px; display: block; }
  .node small { font: 500 11px var(--ca-text); color: var(--ca-muted); white-space: normal; }
  .node.hub { border-color: var(--tint); background: color-mix(in srgb, var(--tint) 12%, var(--ca-panel)); box-shadow: 0 0 18px color-mix(in srgb, var(--tint) 25%, transparent); padding: 10px 16px; font-size: 14px; }
  .node.sm { padding: 4px 8px; font-size: 12px; border-left-width: 1px; }
  .nodes { display: flex; flex-wrap: wrap; gap: 8px; }
  .nodes.center { justify-content: center; }

  /* zone: a nested container, tinted, with a label */
  .zone { position: relative; padding: 32px 14px 14px; border: 1px solid color-mix(in srgb, var(--tint) 45%, transparent); background: color-mix(in srgb, var(--tint) 7%, transparent); }
  .zone::before { content: attr(data-label); position: absolute; left: 14px; top: 10px; font: 600 12px var(--ca-display); color: var(--tint); }
  .zone > * + * { margin-top: 12px; }
  .zone .zone { background: color-mix(in srgb, var(--tint) 6%, var(--ca-bg)); }
  .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }

  /* tree: one root, a row of branches joined by lines */
  .tree { display: grid; justify-items: center; }
  .tree .root { position: relative; padding-bottom: 28px; }
  .tree .root::after { content: ''; position: absolute; left: 50%; bottom: 0; width: 1px; height: 28px; background: var(--tint); opacity: .7; }
  .tree .branches { position: relative; display: grid; grid-template-columns: repeat(var(--n, 3), 1fr); gap: 12px; width: 100%; padding-top: 16px; }
  .tree .branches::before { content: ''; position: absolute; left: calc(100% / var(--n, 3) / 2); right: calc(100% / var(--n, 3) / 2); top: 0; height: 1px; background: var(--tint); opacity: .7; }
  .tree .branch { position: relative; padding: 12px; border: 1px solid var(--ca-line); background: var(--ca-panel); }
  .tree .branch::before { content: ''; position: absolute; left: 50%; top: -16px; width: 1px; height: 16px; background: var(--tint); opacity: .7; }
  .tree .branch h4 { display: flex; align-items: center; gap: 8px; margin: 0 0 8px; font: 600 13px var(--ca-display); color: var(--tint); }
  .tree .branch ul { display: grid; gap: 4px; }
  .tree .branch li { padding: 4px 8px; font-size: 12px; color: var(--ca-soft); background: var(--ca-bg); border: 1px solid var(--ca-line); }

  /* path: nodes joined left to right by arrows (top to bottom on phones) */
  .path { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 0; }
  .path > * { flex: none; }
  .path > .arrow { width: 28px; height: 18px; color: var(--tint); opacity: .8; }
  .path > .arrow::before { content: ''; display: block; width: 100%; height: 18px; background: linear-gradient(currentColor, currentColor) center / calc(100% - 8px) 1px no-repeat, linear-gradient(45deg, transparent 50%, currentColor 50%) right 2px center / 6px 6px no-repeat; clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); }
  .path.v { flex-direction: column; align-items: center; }
  .path.v > .arrow { width: 18px; height: 24px; }
  .path.v > .arrow::before { height: 100%; width: 18px; background: linear-gradient(currentColor, currentColor) center / 1px calc(100% - 8px) no-repeat, linear-gradient(135deg, transparent 50%, currentColor 50%) center bottom 2px / 6px 6px no-repeat; }
  .path.v > .zone, .path.v > .wide { width: 100%; }

  /* chips: tags */
  .chips { display: flex; flex-wrap: wrap; gap: 6px; }
  .chip { display: inline-block; padding: 3px 8px; font: 500 12px var(--ca-display); color: var(--ca-soft); background: var(--ca-bg); border: 1px solid var(--ca-line); }
  .chip.on { color: var(--tint); border-color: color-mix(in srgb, var(--tint) 50%, transparent); background: color-mix(in srgb, var(--tint) 8%, transparent); }

  /* tiles: a figure in a box, number in the tint */
  .tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
  .tile { padding: 16px; border: 1px solid var(--ca-line); background: var(--ca-surface); text-align: left; }
  .tile b { display: block; font: 600 28px/1 var(--ca-display); color: var(--tint); font-variant-numeric: tabular-nums; }
  .tile span { display: block; margin-top: 6px; font-size: 13px; color: var(--ca-ink); }
  .tile small { display: block; margin-top: 2px; font-size: 12px; color: var(--ca-muted); }

  /* problems and gains: a card with an icon and one accent */
  .cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .card { display: grid; grid-template-columns: 36px 1fr; gap: 14px; padding: 16px; border: 1px solid color-mix(in srgb, var(--tint) 35%, transparent); background: color-mix(in srgb, var(--tint) 5%, var(--ca-surface)); }
  .card h4 { margin: 0 0 4px; font: 600 15px var(--ca-display); color: var(--ca-ink); }
  .card p { margin: 0; font-size: 13px; color: var(--ca-soft); }
  .problem { --tint: var(--ca-red); } .gain { --tint: var(--ca-teal); }

  /* numbered phases: square number, title, chips */
  .phases { display: grid; gap: 12px; }
  .phase { display: grid; grid-template-columns: 40px 1fr; gap: 14px; align-items: start; }
  .phase .n { display: grid; place-items: center; width: 40px; height: 40px; font: 600 15px var(--ca-display); color: var(--tint); border: 1px solid var(--tint); background: color-mix(in srgb, var(--tint) 8%, transparent); }
  .phase .box { padding: 14px 16px; }
  .phase h4 { margin: 0 0 8px; font: 600 15px var(--ca-display); }
  .phase .meta { margin: 0 0 8px; }

  /* before and after inside tables and inline */
  .tbl th.before, .tbl td.before { color: var(--ca-red); } .tbl th.after, .tbl td.after { color: var(--ca-teal); } .tbl th.gain, .tbl td.gain { color: var(--ca-orange); font-weight: 600; }
  .tbl tr.total td { color: var(--ca-ink); font-weight: 600; border-top: 1px solid var(--ca-soft); }
  .was { color: var(--ca-red); text-decoration: line-through; text-decoration-thickness: 1px; }
  .now { color: var(--ca-teal); font-weight: 600; }
  .to { color: var(--ca-muted); padding: 0 6px; }

  /* severity and status */
  .sev { display: inline-block; padding: 2px 8px; font: 600 11px var(--ca-display); border: 1px solid var(--tint); color: var(--tint); background: color-mix(in srgb, var(--tint) 8%, transparent); }

  /* code names */
  code { font: 500 13px ui-monospace, "Cascadia Mono", Consolas, monospace; color: var(--ca-ink); background: var(--ca-bg); border: 1px solid var(--ca-line); padding: 1px 5px; }

  @media (max-width: 720px) {
    .diagram { padding: 44px 14px 14px; }
    .diagram::before { left: 14px; }
    .tree .branches { grid-template-columns: 1fr; gap: 8px; padding-top: 0; }
    .tree .branches::before, .tree .branch::before { display: none; }
    .tree .branch { border-left: 2px solid var(--tint); }
    .tree .root { padding-bottom: 12px; } .tree .root::after { display: none; }
    .path:not(.v) { flex-direction: column; align-items: stretch; }
    .path:not(.v) > .arrow { width: 18px; height: 20px; margin: 0 auto; }
    .path:not(.v) > .arrow::before { height: 100%; width: 18px; background: linear-gradient(currentColor, currentColor) center / 1px calc(100% - 8px) no-repeat, linear-gradient(135deg, transparent 50%, currentColor 50%) center bottom 2px / 6px 6px no-repeat; }
    .path:not(.v) > .node { white-space: normal; }
    .cards { grid-template-columns: 1fr; }
    .node { white-space: normal; }
  }

  /* ---------- header dropdown ---------- */
  .dd { position: relative; }
  .dd-btn { all: unset; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; color: var(--ca-soft); font: 500 14px var(--ca-display); }
  .dd-btn::after { content: ''; width: 6px; height: 6px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: translateY(-2px) rotate(45deg); opacity: .8; }
  .dd-btn:hover, .dd-btn:focus-visible, .dd.open .dd-btn { color: var(--ca-ink); }
  .dd-btn:focus-visible { outline: 1px solid var(--ca-cyan); outline-offset: 4px; }
  .dd-menu { display: none; position: absolute; left: -16px; top: calc(100% + 14px); min-width: 300px; padding: 8px 0; background: var(--ca-bg); border: 1px solid var(--ca-line); border-top: 2px solid var(--ca-cyan); z-index: 20; }
  .dd-menu::before { content: ''; position: absolute; left: 0; right: 0; top: -16px; height: 16px; }
  .dd.open .dd-menu, .dd:hover .dd-menu, .dd:focus-within .dd-menu { display: block; }
  .dd-menu a { display: block; padding: 10px 16px; color: var(--ca-ink); font: 600 14px var(--ca-display); }
  .dd-menu a small { display: block; margin-top: 2px; font: 400 12px var(--ca-text); color: var(--ca-muted); }
  .dd-menu a:hover, .dd-menu a:focus-visible { background: var(--ca-surface); text-decoration: none; }
  .dd-menu a.on { border-left: 2px solid var(--ca-cyan); padding-left: 14px; }
  @media (max-width: 720px) {
    .dd-btn::after { display: none; }
    .dd-btn { color: var(--ca-muted); font-size: 12px; letter-spacing: .04em; cursor: default; }
    .dd-menu { display: block; position: static; min-width: 0; padding: 4px 0 0; border: 0; }
    .dd-menu a { padding: 8px 0 8px 12px; border-left: 1px solid var(--ca-line); }
    .dd-menu a.on { padding-left: 12px; border-left-color: var(--ca-cyan); }
  }

  /* ---------- landing zone story: the view drives from the page's scroll ---------- */
  .story { position: relative; border-top: 0; padding: 0; }
  .story .stage { position: sticky; top: 64px; height: calc(100vh - 64px); height: calc(100svh - 64px); overflow: hidden; background: var(--ca-bg); }
  .story .stage picture, .story .stage img, .story .stage iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; object-fit: cover; object-position: 70% 50%; }
  .story .stage img { opacity: 0; transition: opacity .6s var(--ca-ease-enter); }
  .story .stage img.on { opacity: 1; }
  .story .stage::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to right, rgba(5,7,13,.86) 0%, rgba(5,7,13,.55) 40%, transparent 62%); pointer-events: none; }
  .story .stage iframe + picture { display: none; }
  .story .rail { position: absolute; right: 24px; top: 50%; transform: translateY(-50%); z-index: 2; display: grid; gap: 4px; }
  .story .rail a { display: flex; align-items: center; justify-content: flex-end; gap: 9px; padding: 6px 0; font: 500 12px var(--ca-display); color: var(--ca-muted); text-decoration: none; }
  .story .rail a::after { content: ''; width: 14px; height: 1px; background: currentColor; opacity: .6; transition: width .3s var(--ca-ease-enter); }
  .story .rail a .n { color: var(--ca-accent); font-variant-numeric: tabular-nums; }
  .story .rail a .t { max-width: 0; overflow: hidden; white-space: nowrap; opacity: 0; transition: max-width .35s var(--ca-ease-enter), opacity .25s; }
  .story .rail a:hover .t, .story .rail a:focus-visible .t, .story .rail a.on .t { max-width: 160px; opacity: 1; color: var(--ca-ink); }
  .story .rail a.on::after { width: 34px; background: var(--ca-accent); opacity: 1; box-shadow: 0 0 10px var(--ca-accent); }
  .story .chapters { position: relative; z-index: 1; margin-top: calc(-100vh + 64px); margin-top: calc(-100svh + 64px); }
  .chapter { min-height: calc(100vh - 64px); min-height: calc(100svh - 64px); display: grid; align-items: center; scroll-margin-top: 64px; }
  .chapter .wrap { width: 100%; }
  .chapter .copy { max-width: 520px; padding: 48px 0; }
  .chapter h1 { font-size: clamp(40px, 4.8vw, 68px); line-height: .98; letter-spacing: -.02em; text-shadow: -1px 0 rgba(255,61,203,.45), 1px 0 rgba(46,242,255,.45); }
  .chapter h2 { font-size: 40px; line-height: 1; margin-top: 10px; }
  .chapter .q { font: 500 18px var(--ca-display); color: var(--ca-accent); margin: 6px 0 14px; }
  .chapter p.text { color: var(--ca-soft); font-size: 16px; max-width: 46ch; }
  .chapter .intro-text { font-size: 17px; }
  .chapter ul { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--ca-line); display: grid; gap: 10px; }
  .chapter li { position: relative; padding-left: 18px; color: var(--ca-soft); font-size: 15px; }
  .chapter li::before { content: ''; position: absolute; left: 0; top: 11px; width: 8px; height: 1px; background: var(--ca-accent); }
  .chapter .acts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
  .chapter .cue { display: flex; align-items: center; gap: 12px; margin-top: 30px; font: 500 12px var(--ca-display); color: var(--ca-muted); letter-spacing: .1em; }
  .chapter .cue span { width: 1px; height: 34px; background: linear-gradient(transparent, var(--ca-accent)); animation: drip 1.8s ease-in-out infinite; transform-origin: top; }
  @keyframes drip { 0% { transform: scaleY(0); } 60% { transform: scaleY(1); } 100% { transform: scaleY(1); opacity: 0; } }
  @media (prefers-reduced-motion: reduce) { .chapter .cue span { animation: none; } .story .stage img { transition: none; } }
  @media (max-width: 960px) {
    .story .stage { height: 44vh; height: 44svh; z-index: 2; }
    .story .stage::after { background: linear-gradient(to bottom, transparent 70%, var(--ca-bg)); }
    .story .stage img { object-position: 50% 50%; }
    .story .rail { display: none; }
    .story .chapters { margin-top: 0; }
    .chapter { min-height: 0; scroll-margin-top: calc(44vh + 64px); scroll-margin-top: calc(44svh + 64px); }
    .chapter .copy { padding: 40px 0 24px; max-width: none; }
    .chapter h2 { font-size: 32px; }
  }