/* ============================================================================
   Unified Signal — homepage design system ("Switchboard")
   Scope: the homepage only. No other page loads this file.
   Contrast: every text pair below is >= 4.5:1; graphic accents >= 3:1.
   ========================================================================= */

/* ---------- 1. Fonts (self-hosted, latin subset) ---------- */
@font-face {
  font-family: 'Archivo';
  src: url('fonts/archivo-latin-var.woff2') format('woff2-variations');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('fonts/plexmono-latin-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('fonts/plexmono-latin-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- 2. Design tokens ---------- */
:root {
  /* Brand — violet sampled from the deck and the live site footer (#3b065e) */
  --u-violet-900: #250340;
  --u-violet-800: #3b065e;
  --u-violet-700: #4c1e6e;
  --u-violet-600: #5f2f85;
  --u-violet-line: #6b4788;

  /* Brand — amber sampled from the logotype (#FAAF5D) */
  --u-amber: #faaf5d;          /* on violet: 8.27:1 */
  --u-amber-solid: #e8892a;    /* fill on paper; carries --u-ink at 7.03:1 */
  --u-amber-ink: #a24e00;      /* amber-toned text on paper: 5.47:1 */

  /* Paper + ink */
  --u-paper: #fbf8f5;
  --u-paper-2: #f2ece6;
  --u-paper-3: #e6ddd4;
  --u-ink: #1a1024;            /* on paper: 17.36:1 */
  --u-ink-2: #5a4c68;          /* on paper:  7.44:1 */
  --u-ink-line: #d9cec4;

  /* On-violet text */
  --u-on-violet: #ffffff;      /* 15.29:1 */
  --u-on-violet-2: #c9bbd6;    /*  8.42:1 */

  /* Diagram data colours — meaning, never decoration */
  --u-flow-in: #5fc4f0;        /* money arriving  */
  --u-flow-out: #b49cff;       /* money leaving   */
  --u-flow-in-ink: #0b5c80;    /* same meaning, on paper */
  --u-flow-out-ink: #4b2fa8;

  --u-focus: #ffd08a;

  /* Type */
  --u-sans: 'Archivo', 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --u-mono: 'Plex Mono', ui-monospace, 'SFMono-Regular', 'Cascadia Mono', Menlo, Consolas, monospace;
  --u-fs-display: clamp(2.35rem, 1.9rem + 2.2vw, 3.25rem);
  --u-fs-h2: clamp(1.8rem, 1.35rem + 2vw, 2.9rem);
  --u-fs-h3: clamp(1.12rem, 1.06rem + .3vw, 1.35rem);
  --u-fs-lead: clamp(1.06rem, 1rem + .5vw, 1.35rem);
  --u-fs-body: clamp(1rem, .98rem + .12vw, 1.0625rem);
  --u-fs-small: .875rem;
  --u-fs-label: .75rem;

  /* Space */
  --u-s1: .25rem;  --u-s2: .5rem;   --u-s3: .75rem;  --u-s4: 1rem;
  --u-s5: 1.5rem;  --u-s6: 2rem;    --u-s7: 3rem;    --u-s8: 4rem;
  --u-s9: 6rem;    --u-s10: 8rem;
  --u-gutter: clamp(1.25rem, 4vw, 3rem);
  --u-measure: 68ch;
  --u-wrap: 1360px;
  --u-section-y: clamp(4rem, 8vw, 7.5rem);

  /* Radii, elevation, layers */
  --u-r1: 3px; --u-r2: 8px; --u-r3: 16px; --u-r4: 26px; --u-rp: 999px;
  --u-shadow-1: 0 1px 2px rgba(26, 16, 36, .06), 0 4px 12px rgba(26, 16, 36, .05);
  --u-shadow-2: 0 2px 6px rgba(26, 16, 36, .07), 0 18px 40px rgba(26, 16, 36, .09);
  --u-z-header: 100; --u-z-menu: 200; --u-z-skip: 300;

  /* Motion */
  --u-dur-1: 150ms; --u-dur-2: 320ms; --u-dur-3: 640ms;
  --u-ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. Reset + base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--u-paper);
  color: var(--u-ink);
  font-family: var(--u-sans);
  font-size: var(--u-fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4 { margin: 0; line-height: 1.1; font-weight: 700; letter-spacing: -.02em; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }
button { font: inherit; color: inherit; }
:target { scroll-margin-top: 6rem; }

:focus-visible {
  outline: 3px solid var(--u-focus);
  outline-offset: 3px;
  border-radius: var(--u-r1);
}
.u-skip {
  position: absolute; left: var(--u-s4); top: -100%;
  z-index: var(--u-z-skip);
  padding: var(--u-s3) var(--u-s5);
  background: var(--u-amber); color: var(--u-violet-900);
  font-weight: 600; border-radius: var(--u-r2); text-decoration: none;
}
.u-skip:focus { top: var(--u-s4); }
.u-sr {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* ---------- 4. Layout primitives ---------- */
.u-wrap { width: 100%; max-width: var(--u-wrap); margin-inline: auto; padding-inline: var(--u-gutter); }
.u-section { padding-block: var(--u-section-y); position: relative; }
.u-section--paper { background: var(--u-paper); }
.u-section--paper2 { background: var(--u-paper-2); }
.u-section--violet { background: var(--u-violet-800); color: var(--u-on-violet); }
.u-section--violet-deep { background: var(--u-violet-900); color: var(--u-on-violet); }
.u-section--violet p, .u-section--violet-deep p { color: var(--u-on-violet-2); }

/* Section heading block ------------------------------------------------- */
.u-head { max-width: 62ch; margin-bottom: var(--u-s7); }
.u-eyebrow {
  display: flex; align-items: center; gap: var(--u-s3);
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--u-amber-ink); margin-bottom: var(--u-s4);
}
.u-section--violet .u-eyebrow, .u-section--violet-deep .u-eyebrow { color: var(--u-amber); }
.u-eyebrow::before {
  content: ''; width: 1.75rem; height: 2px; flex: none;
  background: currentColor;
}
.u-eyebrow--center { justify-content: center; }
.u-h2 { font-size: var(--u-fs-h2); }
.u-lead { font-size: var(--u-fs-lead); color: var(--u-ink-2); margin-top: var(--u-s4); line-height: 1.5; }
.u-section--violet .u-lead, .u-section--violet-deep .u-lead { color: var(--u-on-violet-2); }
/* Past ~1000px a single 62ch column leaves a long empty gutter beside every
   heading. Setting the lead alongside the heading reads as one masthead, keeps
   both at a comfortable measure, and returns that vertical space to the
   figures below, which are what the section is actually about. */
@media (min-width: 1000px) {
  .u-section:not(.u-final) .u-head {
    max-width: none;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    column-gap: var(--u-s8);
    align-items: start;
  }
  .u-section:not(.u-final) .u-head .u-eyebrow { grid-column: 1 / -1; }
  .u-section:not(.u-final) .u-head .u-lead { margin-top: 0; padding-top: .45rem; }
}
.u-figcap {
  margin-top: var(--u-s5); font-size: var(--u-fs-small);
  color: var(--u-ink-2); max-width: var(--u-measure);
}
.u-section--violet .u-figcap,
.u-section--violet-deep .u-figcap { color: var(--u-on-violet-2); }
.u-figcap b { font-family: var(--u-mono); font-weight: 500; font-size: .8125rem;
  letter-spacing: .06em; text-transform: uppercase; }

/* ---------- 5. Buttons ---------- */
.u-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--u-s3);
  min-height: 48px; padding: var(--u-s3) var(--u-s6);
  border: 2px solid transparent; border-radius: var(--u-rp);
  font-weight: 600; font-size: 1rem; text-decoration: none; cursor: pointer;
  transition: background-color var(--u-dur-1) var(--u-ease),
              border-color var(--u-dur-1) var(--u-ease),
              color var(--u-dur-1) var(--u-ease),
              transform var(--u-dur-1) var(--u-ease);
}
.u-btn:hover { transform: translateY(-1px); }
.u-btn:active { transform: translateY(0); }
.u-btn--primary { background: var(--u-amber); color: var(--u-violet-900); border-color: var(--u-amber); }
.u-btn--primary:hover { background: #ffc37e; border-color: #ffc37e; }
.u-btn--ghost { background: transparent; color: var(--u-on-violet); border-color: var(--u-violet-line); }
.u-btn--ghost:hover { border-color: var(--u-amber); color: var(--u-amber); }
.u-section--paper .u-btn--primary, .u-section--paper2 .u-btn--primary {
  background: var(--u-amber-solid); border-color: var(--u-amber-solid); color: var(--u-ink);
}
.u-section--paper .u-btn--primary:hover { background: #d6771a; border-color: #d6771a; }
.u-section--paper .u-btn--ghost, .u-section--paper2 .u-btn--ghost {
  color: var(--u-ink); border-color: var(--u-ink-line);
}
.u-section--paper .u-btn--ghost:hover { border-color: var(--u-ink); }
.u-btn__arrow { width: 1em; height: 1em; flex: none; transition: transform var(--u-dur-1) var(--u-ease); }
.u-btn:hover .u-btn__arrow { transform: translateX(3px); }
.u-cta-row { display: flex; flex-wrap: wrap; gap: var(--u-s4); align-items: center; }

/* Inline text link with animated rule */
.u-link {
  display: inline-flex; align-items: center; gap: .4em;
  font-weight: 600; text-decoration: none;
  color: var(--u-amber-ink);
  border-bottom: 2px solid currentColor; padding-block: 2px;
}
.u-section--violet .u-link, .u-section--violet-deep .u-link { color: var(--u-amber); }
.u-link:hover { color: var(--u-ink); }
.u-section--violet .u-link:hover,
.u-section--violet-deep .u-link:hover { color: var(--u-on-violet); }

/* ---------- 6. Header ---------- */
.u-header {
  position: sticky; top: 0; z-index: var(--u-z-header);
  background: var(--u-violet-900);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.u-header__bar {
  display: flex; align-items: center; gap: var(--u-s5);
  min-height: 68px; padding-block: var(--u-s3);
}
.u-header__brand { flex: none; display: inline-flex; align-items: center; text-decoration: none; }
.u-header__brand img { width: 172px; height: 52px; object-fit: contain; }
.u-nav { display: none; margin-left: auto; }
.u-nav__list { display: flex; align-items: center; gap: var(--u-s2); }
.u-nav__link {
  display: inline-flex; align-items: center; gap: .35em;
  padding: var(--u-s2) var(--u-s3); border-radius: var(--u-r2);
  color: var(--u-on-violet); text-decoration: none; font-size: .9375rem; font-weight: 500;
  background: none; border: 0; cursor: pointer;
  transition: background-color var(--u-dur-1) var(--u-ease), color var(--u-dur-1) var(--u-ease);
}
.u-nav__link:hover { background: rgba(255, 255, 255, .1); color: var(--u-amber); }
.u-nav__caret { width: .7em; height: .7em; transition: transform var(--u-dur-1) var(--u-ease); }
.u-nav__item { position: relative; }
.u-nav__item--open > .u-nav__link { background: rgba(255, 255, 255, .1); color: var(--u-amber); }
.u-nav__item--open .u-nav__caret { transform: rotate(180deg); }
.u-nav__panel {
  position: absolute; top: calc(100% + 10px); left: 0; z-index: var(--u-z-menu);
  min-width: 264px; padding: var(--u-s3);
  background: var(--u-violet-700); border: 1px solid var(--u-violet-line);
  border-radius: var(--u-r3); box-shadow: 0 18px 46px rgba(0, 0, 0, .38);
  display: none;
}
.u-nav__item--open .u-nav__panel { display: block; }
.u-nav__panel--2col { min-width: 420px; display: none; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--u-s2); }
.u-nav__item--open .u-nav__panel--2col { display: grid; }
html:not(.u-js) .u-nav__item:hover > .u-nav__panel,
html:not(.u-js) .u-nav__item:focus-within > .u-nav__panel { display: block; }
html:not(.u-js) .u-nav__item:hover > .u-nav__panel--2col,
html:not(.u-js) .u-nav__item:focus-within > .u-nav__panel--2col { display: grid; }
.u-nav__panel a {
  display: block; padding: var(--u-s3); border-radius: var(--u-r2);
  color: var(--u-on-violet); text-decoration: none; font-size: .9375rem;
}
.u-nav__panel a:hover { background: rgba(255, 255, 255, .12); color: var(--u-amber); }
.u-nav__panel small { display: block; color: var(--u-on-violet-2); font-size: .78125rem; line-height: 1.4; }
.u-header__cta { display: none; flex: none; }
.u-header__cta .u-btn { min-height: 42px; padding-inline: var(--u-s5); font-size: .9375rem; }
.u-burger {
  margin-left: auto; align-items: center; gap: var(--u-s2);
  min-height: 44px; padding: var(--u-s2) var(--u-s4);
  background: none; border: 1px solid var(--u-violet-line); border-radius: var(--u-rp);
  color: var(--u-on-violet); font-size: .875rem; font-weight: 600; cursor: pointer;
}
.u-burger svg { width: 18px; height: 18px; }
.u-burger__close { display: none; }
.u-burger[aria-expanded='true'] .u-burger__open { display: none; }
.u-burger[aria-expanded='true'] .u-burger__close { display: block; }

/* Progressive enhancement: with JS off the whole menu is simply open and
   usable, and the toggle button is not shown. `u-js` is set by a one-line
   inline script in <head>, so there is no flash and no layout shift. */
.u-mobilenav {
  display: block;
  border-top: 1px solid rgba(255, 255, 255, .1);
  background: var(--u-violet-900);
  max-height: calc(100dvh - 68px); overflow-y: auto;
  padding-block: var(--u-s5) var(--u-s7);
}
.u-js .u-mobilenav[hidden] { display: none; }
.u-burger { display: none; }
.u-js .u-burger { display: inline-flex; }
.u-mobilenav__h {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--u-amber);
  margin: var(--u-s5) 0 var(--u-s3);
}
.u-mobilenav > .u-wrap > nav:first-of-type > .u-mobilenav__h { margin-top: 0; }
.u-mobilenav a {
  display: block; padding: var(--u-s3) 0; color: var(--u-on-violet);
  text-decoration: none; border-bottom: 1px solid rgba(255, 255, 255, .09);
  min-height: 44px;
}
.u-mobilenav .u-btn { width: 100%; margin-top: var(--u-s5); }

@media (min-width: 1040px) {
  .u-nav, .u-header__cta { display: block; }
  .u-burger, .u-js .u-burger { display: none; }
  .u-mobilenav { display: none; }
}

/* ---------- 7. Hero ---------- */
.u-hero {
  position: relative; overflow: hidden;
  background: var(--u-violet-900);
  color: var(--u-on-violet);
  padding-block: clamp(3rem, 6vw, 5.5rem) clamp(3rem, 6vw, 5rem);
}
/* Faint schematic grid — the "switchboard" ground. Pure CSS, no image request. */
.u-hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(115% 85% at 78% 30%, #000 0%, transparent 72%);
}
.u-hero__grid {
  position: relative;
  display: grid; gap: clamp(2.5rem, 5vw, 4rem);
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 1280px) {
  .u-hero__grid { grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr); }
}
.u-hero h1 { font-size: var(--u-fs-display); letter-spacing: -.035em; }
.u-hero h1 em { font-style: normal; color: var(--u-amber); }
.u-hero__lead {
  margin-top: var(--u-s5); font-size: var(--u-fs-lead);
  color: var(--u-on-violet-2); max-width: 54ch; line-height: 1.55;
}
.u-hero .u-cta-row { margin-top: var(--u-s7); }
.u-hero__note {
  margin-top: var(--u-s5); display: flex; flex-wrap: wrap;
  column-gap: 2.25rem; row-gap: .3rem;
  font-family: var(--u-mono); font-size: .8125rem;
  color: var(--u-on-violet-2); letter-spacing: .02em;
}

/* Hero diagram — six service domains on the logotype's signal arcs ------- */
.u-orbit { position: relative; width: 100%; }
.u-orbit__svg { width: 100%; max-width: 620px; height: auto; overflow: visible;
  display: block; margin-inline: auto; }
.u-orbit__arc { fill: none; stroke: var(--u-violet-line); stroke-width: 1.25; opacity: .75; }
.u-orbit__core-ring { fill: none; stroke: var(--u-amber); stroke-width: 1.5; opacity: .45; }
.u-orbit__spoke { stroke: var(--u-violet-line); stroke-width: 1; opacity: .55; }
.u-orbit__node-bg {
  fill: var(--u-violet-700); stroke: var(--u-violet-line); stroke-width: 1.25;
  transition: fill var(--u-dur-1) var(--u-ease), stroke var(--u-dur-1) var(--u-ease);
}
.u-orbit__node-icon { fill: none; stroke: var(--u-on-violet); stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round; transition: stroke var(--u-dur-1) var(--u-ease); }
.u-orbit__node-label {
  fill: var(--u-on-violet-2); font-family: var(--u-mono); font-size: 10.5px;
  letter-spacing: .08em; text-transform: uppercase;
  transition: fill var(--u-dur-1) var(--u-ease);
}
.u-orbit__node:hover .u-orbit__node-bg,
.u-orbit__node[data-active='true'] .u-orbit__node-bg { fill: var(--u-violet-600); stroke: var(--u-amber); }
.u-orbit__node:hover .u-orbit__node-icon,
.u-orbit__node[data-active='true'] .u-orbit__node-icon { stroke: var(--u-amber); }
.u-orbit__node:hover .u-orbit__node-label,
.u-orbit__node[data-active='true'] .u-orbit__node-label { fill: var(--u-on-violet); }
.u-orbit__core { fill: var(--u-amber); }
.u-orbit__core-label {
  fill: var(--u-violet-900); font-family: var(--u-mono); font-size: 9px;
  font-weight: 500; letter-spacing: .08em; text-transform: uppercase;
}
@media (max-width: 430px) {
  .u-orbit__node-label { font-size: 18px; }
  .u-orbit__core-label { font-size: 15px; }
}
@media (min-width: 431px) and (max-width: 560px) {
  .u-orbit__node-label { font-size: 14px; }
  .u-orbit__core-label { font-size: 11.5px; }
}
@media (min-width: 561px) and (max-width: 700px) {
  .u-orbit__node-label { font-size: 11.5px; }
  .u-orbit__core-label { font-size: 9.5px; }
}
.u-orbit__caption {
  margin-top: var(--u-s5); min-height: 4.5rem;
  padding: var(--u-s4) var(--u-s5);
  border: 1px solid var(--u-violet-line); border-radius: var(--u-r3);
  background: rgba(255, 255, 255, .04);
}
.u-orbit__caption h2 {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--u-amber);
  margin-bottom: var(--u-s2);
}
.u-orbit__caption p { font-size: var(--u-fs-small); color: var(--u-on-violet-2); }
/* Arc draw-in, once, on load */
.u-orbit__arc, .u-orbit__core-ring {
  stroke-dasharray: var(--len, 1200); stroke-dashoffset: var(--len, 1200);
  animation: u-draw 1400ms var(--u-ease) forwards;
}
.u-orbit__node { opacity: 0; animation: u-pop 520ms var(--u-ease) forwards; }
.u-orbit__node[data-orbit='wireless']   { animation-delay: .34s; }
.u-orbit__node[data-orbit='fintech']    { animation-delay: .41s; }
.u-orbit__node[data-orbit='merchant']   { animation-delay: .48s; }
.u-orbit__node[data-orbit='engagement'] { animation-delay: .55s; }
.u-orbit__node[data-orbit='wellness']   { animation-delay: .62s; }
.u-orbit__node[data-orbit='music']      { animation-delay: .69s; }
@keyframes u-draw { to { stroke-dashoffset: 0; } }
@keyframes u-pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------- 8. Credibility strip ---------- */
.u-strip { background: var(--u-violet-800); border-block: 1px solid var(--u-violet-line); }
.u-strip__list {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--u-s5) var(--u-s6); padding-block: var(--u-s6);
}
@media (min-width: 800px) { .u-strip__list { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.u-strip__n {
  display: block; font-family: var(--u-mono); font-weight: 500;
  font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.25rem);
  color: var(--u-amber); letter-spacing: -.02em; line-height: 1.1;
}
.u-strip__t { display: block; margin-top: var(--u-s2); font-size: var(--u-fs-small); color: var(--u-on-violet-2); }
.u-strip__src { padding-bottom: var(--u-s6); margin-top: calc(var(--u-s5) * -1);
  font-size: .78125rem; color: var(--u-on-violet-2); }

/* ---------- 9. Generic card grid ---------- */
.u-grid { display: grid; gap: var(--u-s5); grid-template-columns: 1fr; }
@media (min-width: 700px) { .u-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 700px) { .u-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 900px) { .u-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 1100px) { .u-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

.u-card {
  position: relative; padding: var(--u-s6);
  background: #fff; border: 1px solid var(--u-ink-line); border-radius: var(--u-r3);
  box-shadow: var(--u-shadow-1);
}
.u-card h3 { font-size: var(--u-fs-h3); margin-bottom: var(--u-s3); }
.u-card p { color: var(--u-ink-2); font-size: var(--u-fs-small); }
.u-card__n {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .1em; color: var(--u-amber-ink); display: block; margin-bottom: var(--u-s4);
}
.u-card__icon { width: 32px; height: 32px; margin-bottom: var(--u-s4); color: var(--u-amber-ink); }

/* ---------- 10. Icon family ---------- */
/* One grid (24×24), one stroke weight, round caps — arcs, nodes and paths only. */
.u-ico { width: 1em; height: 1em; fill: none; stroke: currentColor;
  stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.u-ico--lg { width: 32px; height: 32px; }

/* ---------- 11. Platform architecture ---------- */
.u-layers { display: grid; gap: var(--u-s5); }
@media (min-width: 1000px) { .u-layers { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; } }
.u-layer {
  background: #fff; border: 1px solid var(--u-ink-line); border-radius: var(--u-r3);
  overflow: hidden; box-shadow: var(--u-shadow-1);
}
.u-layer__head { padding: var(--u-s6) var(--u-s6) var(--u-s5); border-bottom: 1px solid var(--u-ink-line); }
.u-layer__badge {
  display: inline-flex; align-items: center; gap: var(--u-s2);
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--u-amber-ink);
  margin-bottom: var(--u-s3);
}
.u-layer__head h3 { font-size: var(--u-fs-h3); }
.u-layer__head p { margin-top: var(--u-s3); color: var(--u-ink-2); font-size: var(--u-fs-small); }
.u-layer__body { padding: var(--u-s5) var(--u-s6) var(--u-s6); }

.u-caps { display: grid; gap: var(--u-s3); }
.u-cap { display: grid; grid-template-columns: 22px 1fr; gap: var(--u-s3); align-items: start; }
.u-cap svg { width: 22px; height: 22px; color: var(--u-amber-ink); margin-top: 2px; }
.u-cap b { display: block; font-weight: 600; font-size: .9375rem; }
.u-cap span { display: block; color: var(--u-ink-2); font-size: .84rem; line-height: 1.45; }
.u-layer__note {
  margin-top: var(--u-s5); padding-top: var(--u-s5); border-top: 1px solid var(--u-ink-line);
  font-size: .84rem; color: var(--u-ink-2); line-height: 1.55;
}

/* Progressive disclosure — native <details>, works with JS off */
.u-group { border-top: 1px solid var(--u-ink-line); }
.u-group:first-child { border-top: 0; }
.u-group > summary {
  display: flex; align-items: center; justify-content: space-between; gap: var(--u-s3);
  padding: var(--u-s4) 0; cursor: pointer; list-style: none;
  font-weight: 600; font-size: .9375rem; min-height: 44px;
}
.u-group > summary::-webkit-details-marker { display: none; }
.u-group__count { font-family: var(--u-mono); font-size: .75rem; color: var(--u-ink-2); font-weight: 500; }
.u-group__sign { width: 16px; height: 16px; flex: none; color: var(--u-amber-ink);
  transition: transform var(--u-dur-2) var(--u-ease); }
.u-group[open] .u-group__sign { transform: rotate(45deg); }
.u-group > summary:hover { color: var(--u-amber-ink); }
.u-group__body { padding-bottom: var(--u-s5); }

/* ---------- 12. Money rail (primary diagram) ---------- */
.u-rail { position: relative; }
.u-rail__cols {
  position: relative; z-index: 1;
  display: grid; gap: var(--u-s5);
  grid-template-columns: 1fr;
}
@media (min-width: 1000px) {
  .u-rail__cols { grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr) minmax(0, 1fr); gap: var(--u-s8); align-items: center; }
}
.u-rail__side h3 {
  display: flex; align-items: center; gap: var(--u-s3);
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: var(--u-s5);
}
.u-rail__side--in h3 { color: var(--u-flow-in); }
.u-rail__side--out h3 { color: var(--u-flow-out); }
@media (min-width: 1000px) { .u-rail__side--out h3 { justify-content: flex-end; } }
.u-rail__side h3 svg { width: 18px; height: 18px; flex: none; }
.u-railgroup { padding: var(--u-s4) 0; border-top: 1px solid var(--u-violet-line); }
.u-railgroup:first-of-type { border-top: 0; padding-top: 0; }
.u-railgroup b { display: block; font-size: .9375rem; color: var(--u-on-violet); font-weight: 600; }
.u-railgroup span { display: block; margin-top: var(--u-s1); font-size: .8125rem; color: var(--u-on-violet-2); line-height: 1.5; }
@media (min-width: 1000px) { .u-rail__side--out { text-align: right; } }

.u-rail__core {
  position: relative;
  padding: var(--u-s6); border-radius: var(--u-r4);
  background: linear-gradient(180deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .03));
  border: 1px solid var(--u-violet-line);
}
.u-rail__core > h3 {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--u-amber);
  text-align: center; margin-bottom: var(--u-s5);
}
.u-rail__nodes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--u-s3); }
@media (min-width: 560px) { .u-rail__nodes { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.u-railnode {
  display: flex; flex-direction: column; align-items: center; gap: var(--u-s2);
  padding: var(--u-s4) var(--u-s2); text-align: center;
  border: 1px solid var(--u-violet-line); border-radius: var(--u-r2);
  background: rgba(37, 3, 64, .5);
  transition: border-color var(--u-dur-1) var(--u-ease), background-color var(--u-dur-1) var(--u-ease);
}
.u-railnode:hover { border-color: var(--u-amber); background: rgba(95, 47, 133, .5); }
.u-railnode svg { width: 22px; height: 22px; color: var(--u-amber); }
.u-railnode span { font-size: .75rem; line-height: 1.3; color: var(--u-on-violet); }

/* Connectors. Drawn as a CSS bus bar rather than an overlaid SVG: each rail
   row taps the bus at its own vertical centre, so the diagram stays correct at
   any content height or text size instead of relying on fixed coordinates. */
.u-rail__bus { position: relative; }
@media (min-width: 1000px) {
  .u-rail__bus::after {
    content: ''; position: absolute; top: 0; bottom: 0; width: 1px; opacity: .55;
  }
  .u-rail__side--in .u-rail__bus::after { right: -2rem; background: var(--u-flow-in); }
  .u-rail__side--out .u-rail__bus::after { left: -2rem; background: var(--u-flow-out); }

  .u-railgroup { position: relative; }
  .u-railgroup::after {
    content: ''; position: absolute; top: 50%; width: 2rem; height: 1px; opacity: .55;
  }
  .u-rail__side--in .u-railgroup::after { left: 100%; background: var(--u-flow-in); }
  .u-rail__side--out .u-railgroup::after { right: 100%; background: var(--u-flow-out); }

  .u-rail__core::before, .u-rail__core::after {
    content: ''; position: absolute; top: 50%; height: 1px; width: 2rem; opacity: .55;
  }
  .u-rail__core::before { right: 100%; background: var(--u-flow-in); }
  .u-rail__core::after { left: 100%; background: var(--u-flow-out); }
}

/* ---------- 13. Three-balance model ---------- */
.u-bal { display: grid; gap: var(--u-s7); }
@media (min-width: 1000px) { .u-bal { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); align-items: center; } }
.u-bal__tabs { display: flex; flex-wrap: wrap; gap: var(--u-s2); margin-bottom: var(--u-s5); }
.u-bal__tab {
  min-height: 44px; padding: var(--u-s2) var(--u-s5);
  background: transparent; border: 1px solid var(--u-violet-line); border-radius: var(--u-rp);
  color: var(--u-on-violet-2); font-size: .875rem; font-weight: 600; cursor: pointer;
  transition: all var(--u-dur-1) var(--u-ease);
}
.u-bal__tab:hover { border-color: var(--u-amber); color: var(--u-on-violet); }
.u-bal__tab[aria-selected='true'] { background: var(--u-amber); border-color: var(--u-amber); color: var(--u-violet-900); }
.u-bal__panel { border-left: 2px solid var(--u-amber); padding-left: var(--u-s5); }
.u-bal__panel h3 { font-size: var(--u-fs-h3); margin-bottom: var(--u-s3); }
.u-bal__panel p { color: var(--u-on-violet-2); }
.u-bal__panel dl { margin: var(--u-s5) 0 0; display: grid; gap: var(--u-s4); }
.u-bal__panel dt {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--u-amber); margin-bottom: var(--u-s1);
}
.u-bal__panel dd { margin: 0; font-size: var(--u-fs-small); color: var(--u-on-violet-2); }
/* JS-off: the tablist stays hidden and all three panels stack and read
   normally. JS un-hides the tablist and hides all but the selected panel. */
.u-bal__panel + .u-bal__panel { margin-top: var(--u-s6); }
.u-bal__panel[hidden] { display: none; }
.u-bal__tabs[hidden] { display: none; }
.u-js .u-bal__panel + .u-bal__panel { margin-top: 0; }

.u-balfig { width: 100%; height: auto; overflow: visible; }
.u-balfig__box { fill: rgba(255, 255, 255, .05); stroke: var(--u-violet-line); stroke-width: 1.25;
  transition: fill var(--u-dur-2) var(--u-ease), stroke var(--u-dur-2) var(--u-ease); }
.u-balfig__box.is-on { fill: rgba(250, 175, 93, .14); stroke: var(--u-amber); }
.u-balfig__label { fill: var(--u-on-violet); font-family: var(--u-sans); font-size: 12px; font-weight: 600; }
.u-balfig__sub { fill: var(--u-on-violet-2); font-family: var(--u-mono); font-size: 9.5px; letter-spacing: .06em; }
.u-balfig__arrow { fill: none; stroke: var(--u-flow-out); stroke-width: 1.5; opacity: .6; marker-end: url(#u-arrow); }
.u-balfig__arrow--in { stroke: var(--u-flow-in); }
.u-balfig__shield { fill: none; stroke: var(--u-flow-in); stroke-width: 1.4; stroke-dasharray: 4 4; opacity: .8; }
.u-balfig__ico { fill: none; stroke: var(--u-amber); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- 14. Wireless ---------- */
.u-feat { display: grid; gap: var(--u-s4) var(--u-s6); grid-template-columns: 1fr; }
@media (min-width: 640px) { .u-feat { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.u-feat li { display: grid; grid-template-columns: 20px 1fr; gap: var(--u-s3); align-items: start;
  padding-block: var(--u-s2); font-size: .9375rem; }
.u-feat svg { width: 20px; height: 20px; color: var(--u-amber-ink); margin-top: 3px; }

/* ---------- 15. Launch timeline (Gantt) ---------- */
.u-gantt { --u-weeks: 12; }
.u-gantt__ruler {
  display: grid; grid-template-columns: repeat(var(--u-weeks), minmax(0, 1fr));
  gap: 2px; margin-bottom: var(--u-s3); padding-left: 0;
}
@media (min-width: 860px) { .u-gantt__ruler, .u-gantt__row { padding-left: 15rem; } }
.u-gantt__ruler span {
  font-family: var(--u-mono); font-size: .6875rem; color: var(--u-on-violet-2);
  text-align: center; letter-spacing: .04em;
}
.u-gantt__row { padding-block: var(--u-s3); border-top: 1px solid rgba(255, 255, 255, .09);
  position: relative; }
.u-gantt__name {
  display: flex; flex-wrap: wrap; gap: var(--u-s1) var(--u-s3); align-items: baseline;
  font-size: .875rem; color: var(--u-on-violet); margin-bottom: var(--u-s2);
}
@media (min-width: 860px) {
  .u-gantt__name { position: absolute; left: 0; top: 50%; transform: translateY(-50%);
    width: 14rem; margin: 0; text-align: right; padding-right: var(--u-s4);
    display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
}
.u-gantt__wk { font-family: var(--u-mono); font-size: .6875rem; letter-spacing: .05em;
  color: var(--u-amber); white-space: nowrap; }
.u-gantt__track { display: grid; grid-template-columns: repeat(var(--u-weeks), minmax(0, 1fr)); gap: 2px; }
.u-gantt__bar {
  grid-column: var(--from) / calc(var(--to) + 1);
  height: 22px; border-radius: var(--u-rp);
  background: linear-gradient(90deg, var(--u-amber), #f7c68d);
  display: flex; align-items: center; justify-content: center;
  transform-origin: left center;
}
.u-gantt__bar span { font-family: var(--u-mono); font-size: .625rem; color: var(--u-violet-900);
  letter-spacing: .04em; white-space: nowrap; }
.u-gantt.is-live .u-gantt__bar { animation: u-grow 520ms var(--u-ease) backwards; }
@keyframes u-grow { from { transform: scaleX(.02); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }
.u-gantt__legend { margin-top: var(--u-s5); font-family: var(--u-mono); font-size: .75rem;
  color: var(--u-on-violet-2); letter-spacing: .04em; }

/* ---------- 16. Engagement models ---------- */
.u-model { display: flex; flex-direction: column; height: 100%; }
.u-model__time {
  font-family: var(--u-mono); font-size: .8125rem; font-weight: 500;
  color: var(--u-amber-ink); letter-spacing: .06em; margin-bottom: var(--u-s3); display: block;
}
.u-model ul { margin-top: var(--u-s5); display: grid; gap: var(--u-s2); }
.u-model ul li { display: grid; grid-template-columns: 16px 1fr; gap: var(--u-s3);
  font-size: .875rem; color: var(--u-ink-2); align-items: start; }
.u-model ul svg { width: 16px; height: 16px; color: var(--u-amber-ink); margin-top: 4px; }

/* ---------- 17. Audience + replaceable image slots ---------- */
.u-aud { display: grid; gap: var(--u-s6); }
@media (min-width: 860px) { .u-aud { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.u-aud__item { display: flex; flex-direction: column; }
/* Stable, replaceable image slot: fixed ratio + centralised metadata.
   Drop a real licensed photo into the <picture> and nothing else changes. */
.u-slot {
  position: relative; aspect-ratio: 4 / 3; width: 100%;
  border-radius: var(--u-r3); overflow: hidden;
  background: var(--u-violet-800); margin-bottom: var(--u-s5);
}
.u-slot > img { width: 100%; height: 100%; object-fit: cover; }
.u-slot__art { position: absolute; inset: 0; width: 100%; height: 100%; }
.u-aud__item h3 { font-size: var(--u-fs-h3); margin-bottom: var(--u-s3); }
.u-aud__item p { color: var(--u-ink-2); font-size: var(--u-fs-small); }
.u-aud__tags { margin-top: var(--u-s4); display: flex; flex-wrap: wrap; gap: var(--u-s2); }
.u-aud__tags li {
  font-family: var(--u-mono); font-size: .6875rem; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 10px; border: 1px solid var(--u-ink-line); border-radius: var(--u-rp); color: var(--u-ink-2);
}
.u-stat-note {
  margin-top: var(--u-s7); padding: var(--u-s5) var(--u-s6);
  border-left: 3px solid var(--u-amber-solid); background: #fff; border-radius: 0 var(--u-r2) var(--u-r2) 0;
  font-size: var(--u-fs-small); color: var(--u-ink-2); max-width: var(--u-measure);
}
.u-stat-note b { font-family: var(--u-mono); font-weight: 500; color: var(--u-ink); }
.u-stat-note cite { display: block; margin-top: var(--u-s2); font-style: normal; font-size: .78125rem; }

/* ---------- 18. Build / stitch / buy ---------- */
.u-paths { display: grid; gap: var(--u-s5); }
@media (min-width: 900px) { .u-paths { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.u-path { display: flex; flex-direction: column; height: 100%; }
.u-path--ours { border-color: var(--u-amber-solid); box-shadow: var(--u-shadow-2); }
.u-path h3 { font-size: var(--u-fs-h3); }
.u-path__what { margin-top: var(--u-s4); font-size: var(--u-fs-small); color: var(--u-ink-2); }
.u-path dl { margin: var(--u-s5) 0 0; display: grid; gap: var(--u-s4); }
.u-path dt {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--u-ink-2); margin-bottom: var(--u-s1);
}
.u-path--ours dt { color: var(--u-amber-ink); }
.u-path dd { margin: 0; font-size: .875rem; }

/* ---------- 19. Final CTA ---------- */
.u-final { text-align: center; }
.u-final h2 { font-size: var(--u-fs-h2); max-width: 20ch; margin-inline: auto; }
.u-final .u-lead { margin-inline: auto; max-width: 56ch; }
.u-final .u-cta-row { justify-content: center; margin-top: var(--u-s7); }
.u-final__direct {
  margin-top: var(--u-s7); padding-top: var(--u-s6);
  border-top: 1px solid var(--u-violet-line);
  display: flex; flex-wrap: wrap; gap: var(--u-s4) var(--u-s7); justify-content: center;
}
.u-final__direct a {
  display: inline-flex; align-items: center; gap: var(--u-s3);
  color: var(--u-on-violet); text-decoration: none; font-size: .9375rem; min-height: 44px;
}
.u-final__direct a:hover { color: var(--u-amber); }
.u-final__direct svg { width: 18px; height: 18px; color: var(--u-amber); flex: none; }

/* ---------- 20. Footer ---------- */
.u-footer { background: var(--u-violet-900); color: var(--u-on-violet); padding-block: var(--u-s8) var(--u-s6); }
.u-footer__top { display: grid; gap: var(--u-s7); grid-template-columns: 1fr; }
@media (min-width: 720px) { .u-footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1040px) { .u-footer__top { grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); } }
.u-footer__brand img { width: 200px; height: 60px; object-fit: contain; }
.u-footer__brand p { margin-top: var(--u-s5); font-size: var(--u-fs-small); color: var(--u-on-violet-2); max-width: 40ch; }
.u-footer h2 {
  font-family: var(--u-mono); font-size: var(--u-fs-label); font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--u-amber); margin-bottom: var(--u-s4);
}
.u-footer nav li { margin-bottom: var(--u-s1); }
.u-footer nav a {
  display: inline-block; padding: 6px 0; color: var(--u-on-violet-2);
  text-decoration: none; font-size: .875rem; min-height: 32px;
}
.u-footer nav a:hover { color: var(--u-amber); }
.u-footer address { font-style: normal; font-size: .875rem; color: var(--u-on-violet-2); line-height: 1.7; }
.u-footer address a { display: inline-block; padding-block: 5px; color: var(--u-on-violet-2); }
.u-footer address a:hover { color: var(--u-amber); }
.u-social { display: flex; gap: var(--u-s3); margin-top: var(--u-s5); }
.u-social a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--u-violet-line); border-radius: var(--u-rp);
  color: var(--u-on-violet); transition: all var(--u-dur-1) var(--u-ease);
}
.u-social a:hover { border-color: var(--u-amber); color: var(--u-amber); }
.u-social svg { width: 18px; height: 18px; }
.u-footer__bottom {
  margin-top: var(--u-s8); padding-top: var(--u-s5);
  border-top: 1px solid var(--u-violet-line);
  display: flex; flex-wrap: wrap; gap: var(--u-s3) var(--u-s5);
  align-items: center; justify-content: space-between;
  font-size: .8125rem; color: var(--u-on-violet-2);
}
.u-footer__legal { display: flex; flex-wrap: wrap; gap: var(--u-s4); }
.u-footer__legal a { color: var(--u-on-violet-2); text-decoration: none; }
.u-footer__legal a:hover { color: var(--u-amber); }

/* ---------- 21. Scroll reveal (opt-in, JS-added) ---------- */
/* Only ever hidden when JS is present to reveal it again. */
.u-js .u-reveal { opacity: 0; transform: translateY(14px); }
.u-js .u-reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity var(--u-dur-3) var(--u-ease), transform var(--u-dur-3) var(--u-ease);
}

/* ---------- 22. Reduced motion — static, information-equivalent ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .u-orbit__arc, .u-orbit__core-ring { stroke-dashoffset: 0; }
  .u-orbit__node { opacity: 1; }
  .u-gantt__bar { transform: none; opacity: 1; }
  .u-js .u-reveal { opacity: 1; transform: none; }
  .u-btn:hover { transform: none; }
}

/* ---------- 23. Forced colours ---------- */
@media (forced-colors: active) {
  .u-btn { border: 2px solid ButtonText; }
  .u-card, .u-layer, .u-railnode, .u-rail__core { border: 1px solid CanvasText; }
  .u-orbit__node-bg, .u-balfig__box { forced-color-adjust: none; }
}

/* ---------- 24. Print ---------- */
@media print {
  .u-header, .u-mobilenav, .u-rail__wires, .u-orbit__caption { display: none !important; }
  body { background: #fff; color: #000; }
  .u-section--violet, .u-section--violet-deep, .u-hero, .u-footer, .u-strip {
    background: #fff !important; color: #000 !important;
  }
}