/* ============================================================
   Adaptive Traffic Light System — design system
   Clean & techy / modern-engineering. Light base, signal accents.
   ============================================================ */

:root {
  /* palette is overridable by Tweaks (set on :root by app) */
  --red:   #E5443B;
  --amber: #F2A516;
  --green: #1FA85C;

  --red-ink:   color-mix(in srgb, var(--red) 78%, #1a0d0c);
  --amber-ink: color-mix(in srgb, var(--amber) 60%, #2a1c00);
  --green-ink: color-mix(in srgb, var(--green) 78%, #04190f);

  --red-tint:   color-mix(in srgb, var(--red) 11%, var(--bg));
  --amber-tint: color-mix(in srgb, var(--amber) 13%, var(--bg));
  --green-tint: color-mix(in srgb, var(--green) 12%, var(--bg));

  --bg:        #F6F6F2;
  --surface:   #FFFFFF;
  --surface-2: #EFEFEA;
  --ink:       #15171C;
  --ink-2:     #3A3F49;
  --ink-soft:  #6A6F7B;
  --line:      #E2E2DC;
  --line-2:    #D2D2CB;

  --font-display: "Space Grotesk", "Space Grotesk Fallback", system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --maxw: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 14px;
  --radius-sm: 9px;

  --shadow-sm: 0 1px 2px rgba(20,23,28,.05), 0 1px 1px rgba(20,23,28,.04);
  --shadow:    0 8px 30px -10px rgba(20,23,28,.22), 0 2px 6px rgba(20,23,28,.06);
  --shadow-lg: 0 28px 70px -22px rgba(20,23,28,.32);

  --anim: 1; /* animation intensity multiplier from tweaks (0..1) */
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  isolation: isolate;
}

/* ---- layered page depth (fixed, sits behind everything) ---- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    /* cool directional light from top-left, warm fill bottom-right */
    radial-gradient(120% 95% at 10% -10%, color-mix(in srgb, #3B5BDB 10%, transparent) 0%, transparent 48%),
    radial-gradient(110% 100% at 102% 110%, color-mix(in srgb, var(--amber) 10%, transparent) 0%, transparent 50%),
    /* base wash: lighter center → darker edges for a clear lift */
    radial-gradient(135% 115% at 50% 8%, #FCFCFA 0%, var(--bg) 40%, #E6E6DE 100%);
}
/* faint blueprint grid for texture/depth */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--ink) 6%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--ink) 6%, transparent) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
  /* keep the grid present across the page but softest at the very center */
  -webkit-mask: radial-gradient(135% 120% at 50% 30%, color-mix(in srgb,#000 55%,transparent) 0%, #000 60%, #000 100%);
          mask: radial-gradient(135% 120% at 50% 30%, color-mix(in srgb,#000 55%,transparent) 0%, #000 60%, #000 100%);
  opacity: .9;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.04;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }

/* ---------- layout primitives ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 9vw, 132px); }
.section--tight { padding-block: clamp(44px, 6vw, 80px); }

.kicker {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.kicker .num { color: var(--ink); }
.kicker .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); }

.eyebrow-rule { height: 1px; background: var(--line); border: 0; margin: 0; }

.lede {
  font-size: clamp(18px, 1.5vw, 21px);
  color: var(--ink-2);
  max-width: 60ch;
  line-height: 1.62;
}

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 20px;
  border-radius: 999px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn--ghost:hover { border-color: var(--ink); background: var(--surface); }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 0 var(--gutter);
  height: 66px;
  display: flex; align-items: center; justify-content: flex-start;
  gap: clamp(14px, 2.5vw, 32px);
}
.brand { display: flex; align-items: center; gap: 12px; cursor: pointer; }
.brand__name { font-family: var(--font-display); font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.brand__name small { display:block; font-family: var(--font-mono); font-weight: 400; font-size: 10px; letter-spacing: .18em; color: var(--ink-soft); text-transform: uppercase; margin-top: 1px; }

.nav__links { display: flex; align-items: center; gap: 2px; flex-wrap: nowrap; }
.nav__link {
  font-family: var(--font-mono);
  font-size: 12.5px; letter-spacing: .01em;
  color: var(--ink-soft);
  padding: 8px 11px; border-radius: 8px;
  position: relative; white-space: nowrap;
  transition: color .15s ease, background .15s ease;
  cursor: pointer;
}
.nav__link:hover { color: var(--ink); background: var(--surface); }
.nav__link.is-active { color: var(--ink); }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px;
  background: var(--green); border-radius: 2px;
}
.nav__toggle { display: none; }

@media (max-width: 920px) {
  .nav__links {
    position: fixed; inset: 66px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 18px;
    transform: translateY(-120%); transition: transform .3s ease;
    box-shadow: var(--shadow);
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__link { padding: 13px 6px; font-size: 14px; border-radius: 0; border-bottom: 1px solid var(--line); }
  .nav__link.is-active::after { display: none; }
  .nav__link.is-active { color: var(--green-ink); }
  .nav__toggle {
    display: inline-flex; flex-direction: column; gap: 4px;
    background: none; border: 0; cursor: pointer; padding: 8px;
    margin-left: auto;
  }
  .nav__toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }
  .nav__toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav__toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav__toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ---------- stoplight motif ---------- */
.stoplight {
  display: inline-grid; gap: var(--sl-gap, 10px);
  padding: var(--sl-pad, 12px);
  background: #15171C;
  border-radius: var(--sl-r, 999px);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06), var(--shadow);
}
.stoplight__lamp {
  width: var(--sl-size, 34px); height: var(--sl-size, 34px);
  border-radius: 50%;
  background: var(--lamp-off, #2A2D34);
  position: relative;
  transition: background .35s ease, box-shadow .35s ease, opacity .35s ease;
  opacity: .35;
}
.stoplight__lamp.on { opacity: 1; }
.stoplight__lamp.red.on   { background: var(--red);   box-shadow: 0 0 calc(22px * var(--anim)) 1px color-mix(in srgb, var(--red) 70%, transparent), inset 0 -3px 6px rgba(0,0,0,.25), inset 0 3px 6px rgba(255,255,255,.25); }
.stoplight__lamp.amber.on { background: var(--amber); box-shadow: 0 0 calc(22px * var(--anim)) 1px color-mix(in srgb, var(--amber) 70%, transparent), inset 0 -3px 6px rgba(0,0,0,.25), inset 0 3px 6px rgba(255,255,255,.3); }
.stoplight__lamp.green.on { background: var(--green); box-shadow: 0 0 calc(22px * var(--anim)) 1px color-mix(in srgb, var(--green) 70%, transparent), inset 0 -3px 6px rgba(0,0,0,.25), inset 0 3px 6px rgba(255,255,255,.25); }

/* tiny logo variant */
.stoplight--logo { --sl-size: 8px; --sl-gap: 4px; --sl-pad: 5px; --sl-r: 999px; grid-auto-flow: row; }

/* ---------- stat box ---------- */
.statgrid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 22px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.stat:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.stat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px;
  background: var(--accent, var(--ink));
}
.stat--red   { --accent: var(--red); }
.stat--amber { --accent: var(--amber); }
.stat--green { --accent: var(--green); }
.stat__label { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft); }
.stat__value {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(40px, 5.5vw, 66px); line-height: .98; letter-spacing: -0.03em;
  margin-top: 12px; color: var(--ink);
  display: flex; align-items: baseline; gap: 4px;
}
.stat__value .unit { font-size: .42em; color: var(--accent); letter-spacing: 0; }
.stat__value .pre  { font-size: .55em; color: var(--accent); }
.stat__desc { margin-top: 12px; font-size: 14.5px; color: var(--ink-2); line-height: 1.5; }

/* mega stat (hero / impact) */
.megastat { display: grid; gap: 4px; }
.megastat__value {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(56px, 11vw, 132px); line-height: .9; letter-spacing: -0.04em;
}
.megastat__value .unit { font-size: .32em; }

/* ---------- cards / panels ---------- */
.panel {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.chip {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em;
  text-transform: uppercase; padding: 5px 11px; border-radius: 999px;
  border: 1px solid var(--line-2); color: var(--ink-2); display: inline-flex; gap: 7px; align-items: center;
}
.chip .dot { width: 7px; height: 7px; border-radius: 50%; }

/* numbered step */
.steplist { display: grid; gap: 2px; }
.step { display: grid; grid-template-columns: 64px 1fr; gap: 8px; padding: 26px 0; border-top: 1px solid var(--line); }
.step__n { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); letter-spacing: .1em; }
.step__t { font-family: var(--font-display); font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.step__b { color: var(--ink-2); max-width: 62ch; }

/* image slot styling */
image-slot {
  display: block; width: 100%;
  background: repeating-linear-gradient(135deg, var(--surface-2), var(--surface-2) 11px, #e7e7e1 11px, #e7e7e1 22px);
  border: 1px solid var(--line-2);
}
.slot-cap { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); margin-top: 9px; }

/* purpose-built illustration frames (fill the image frames) */
.illus {
  position: relative; width: 100%; overflow: hidden;
  border-radius: 12px; border: 1px solid var(--line-2);
  box-shadow: var(--shadow-sm); background: var(--surface);
}
.illus svg { display: block; width: 100%; height: auto; }

/* table (engineering data) */
.dtable { width: 100%; border-collapse: collapse; font-size: 15px; }
.dtable th { text-align: left; font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); padding: 12px 16px; border-bottom: 1px solid var(--line-2); font-weight: 500; }
.dtable td { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.dtable tr:last-child td { border-bottom: 0; }
.dtable td.mono { font-family: var(--font-mono); }
.dtable .swatch { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 9px; vertical-align: middle; }

/* footer */
.footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer__inner { max-width: var(--maxw); margin: 0 auto; padding: 54px var(--gutter); display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }
.footer__links { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.footer__links a { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); padding: 4px 0; }
.footer__links a:hover { color: var(--ink); }
.footer__meta { font-family: var(--font-mono); font-size: 12px; color: var(--ink-soft); line-height: 1.7; }
@media (max-width: 720px) { .footer__inner { grid-template-columns: 1fr; } }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(calc(18px * var(--anim))); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* page intro/header */
.pagehead { padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(28px, 4vw, 52px); }
.pagehead h1 { font-size: clamp(40px, 7vw, 86px); }

/* utility */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 4vw, 60px); align-items: center; }
.grid-2--top { align-items: start; }
@media (max-width: 860px) { .grid-2 { grid-template-columns: 1fr; } }
.stack { display: grid; gap: 20px; }
.stack-sm { display: grid; gap: 12px; }
.muted { color: var(--ink-soft); }
.accent-red { color: var(--red-ink); }
.accent-amber { color: var(--amber-ink); }
.accent-green { color: var(--green-ink); }
.mono { font-family: var(--font-mono); }

::selection { background: color-mix(in srgb, var(--green) 30%, transparent); }

/* ============================================================
   v2 — colorful bands, page heroes, loss globe
   Adds richness on top of the light editorial base.
   ============================================================ */

/* ---- tricolor signal stripe atop the nav ---- */
.nav::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: linear-gradient(90deg,
    var(--red) 0 33.34%, var(--amber) 33.34% 66.67%, var(--green) 66.67% 100%);
  z-index: 1;
}
.nav__inner { position: relative; z-index: 2; }

/* ---- colorful, artsy page-hero band ---- */
.pagehero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(60px, 8vw, 110px);
  padding-bottom: 0;
  background:
    radial-gradient(130% 150% at 6% -25%, color-mix(in srgb, var(--band) 40%, var(--bg)) 0%, transparent 58%),
    linear-gradient(140deg,
      color-mix(in srgb, var(--band) 24%, var(--bg)) 0%,
      color-mix(in srgb, var(--band) 9%, var(--bg)) 60%,
      var(--bg) 100%);
  border-bottom: 1px solid color-mix(in srgb, var(--band) 26%, var(--line));
}
.pagehero--red   { --band: var(--red); }
.pagehero--amber { --band: var(--amber); }
.pagehero--green { --band: var(--green); }
.pagehero--blue  { --band: #3B5BDB; }

.pagehero__body { padding-bottom: clamp(40px, 5vw, 66px); position: relative; z-index: 2; }
.pagehero .wrap { position: relative; z-index: 2; }
.pagehero h1 { font-size: clamp(40px, 7vw, 88px); }

.pagehero__ghost {
  position: absolute;
  right: clamp(-26px, -1vw, 24px);
  top: clamp(28px, 5vw, 64px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(170px, 33vw, 440px);
  line-height: .74;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 2px color-mix(in srgb, var(--band) 46%, transparent);
  opacity: .55;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

/* ---- tricolor marquee strip ---- */
.marquee {
  position: relative;
  overflow: hidden;
  border-top: 1px solid color-mix(in srgb, var(--band, var(--ink)) 32%, var(--line));
  background: color-mix(in srgb, var(--band, var(--ink)) 13%, var(--bg));
  padding-block: 12px;
  -webkit-mask: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
          mask: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
}
.marquee__track {
  display: flex; align-items: center; width: max-content;
  animation: marqueeMove calc(34s / var(--anim, 1)) linear infinite;
  will-change: transform;
}
.marquee__item {
  display: inline-flex; align-items: center; gap: 18px;
  padding-inline: 18px;
  font-family: var(--font-mono);
  font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-2); white-space: nowrap;
}
.marquee__item .sep { width: 7px; height: 7px; border-radius: 50%; flex: none; }
@keyframes marqueeMove { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .marquee__track { animation: none; } }

/* ---- dark band (loss globe, etc.) ---- */
.darkband {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(80% 120% at 78% 12%, #1d2734 0%, transparent 55%),
    radial-gradient(70% 110% at 6% 96%, #1a2330 0%, transparent 55%),
    var(--ink);
  color: #E7E8E5;
  border-block: 1px solid #23262d;
}
.darkband::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: linear-gradient(90deg,
    var(--red) 0 33.34%, var(--amber) 33.34% 66.67%, var(--green) 66.67% 100%);
  opacity: .9;
}
.darkband .kicker { color: #98a0ad; }
.darkband .kicker .num { color: #E7E8E5; }
.darkband h2 { color: #F4F4F1; }
.darkband .lede, .darkband .muted { color: #aeb4be; }

/* ---- loss globe ---- */
.lossglobe {
  display: grid;
  grid-template-columns: minmax(280px, 440px) 1fr;
  gap: clamp(30px, 5vw, 76px);
  align-items: center;
}
@media (max-width: 880px) { .lossglobe { grid-template-columns: 1fr; } }

.globe-stage {
  position: relative;
  width: 100%; max-width: 420px;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  display: grid; place-items: center;
  isolation: isolate;
}
.globe-stage::after { /* atmosphere glow */
  content: ""; position: absolute; inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--green) 26%, transparent) 0%, transparent 62%);
  filter: blur(22px);
  z-index: -1;
}
.globe-ring {
  position: absolute; inset: -3%;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 60%,
    color-mix(in srgb, var(--amber) 85%, transparent) 80%, var(--red) 93%, transparent 100%);
  -webkit-mask: radial-gradient(transparent 57%, #000 58%);
          mask: radial-gradient(transparent 57%, #000 58%);
  animation: spinCW calc(10s / var(--anim, 1)) linear infinite;
  opacity: .85;
}
.globe-ring.is-2 {
  inset: 4%;
  background: conic-gradient(from 130deg, transparent 0 68%,
    color-mix(in srgb, var(--green) 85%, transparent) 86%, transparent 100%);
  animation: spinCCW calc(16s / var(--anim, 1)) linear infinite;
  opacity: .7;
}
@keyframes spinCW  { to { transform: rotate(360deg); } }
@keyframes spinCCW { to { transform: rotate(-360deg); } }

.globe-wire { width: 76%; height: 76%; overflow: visible; }
.globe-wire .lat { fill: none; stroke: rgba(150,205,255,.22); stroke-width: .5; }
.globe-wire .limb { fill: none; stroke: rgba(150,205,255,.40); stroke-width: .7; }
.globe-wire .meridian {
  fill: none; stroke: rgba(120,235,180,.5); stroke-width: .55;
  animation: meridianSpin calc(11s / var(--anim, 1)) linear infinite;
}
@keyframes meridianSpin {
  0%, 100% { rx: 48px; opacity: .85; }
  50%      { rx: 1.5px; opacity: .18; }
}
.globe-wire .city {
  fill: var(--amber);
  animation: cityPulse calc(2.4s / var(--anim, 1)) ease-in-out infinite;
  filter: drop-shadow(0 0 2px var(--amber));
}
.globe-wire .city.is-red { fill: var(--red); filter: drop-shadow(0 0 2px var(--red)); }
@keyframes cityPulse { 0%,100% { opacity: .35; r: .9px; } 50% { opacity: 1; r: 1.9px; } }
@media (prefers-reduced-motion: reduce) {
  .globe-ring, .globe-wire .meridian, .globe-wire .city { animation: none; }
}

/* loss meters */
.lossmeters { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 480px) { .lossmeters { grid-template-columns: 1fr; } }
.lossmeter {
  position: relative; overflow: hidden;
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: var(--radius-sm);
  padding: 18px 20px 16px;
}
.lossmeter::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--accent, var(--green));
}
.lossmeter__label {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .13em;
  text-transform: uppercase; color: #9097a2;
}
.lossmeter__value {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(28px, 3.4vw, 40px); line-height: 1; letter-spacing: -.02em;
  margin-top: 9px; color: #F4F4F1;
  font-variant-numeric: tabular-nums;
  display: flex; align-items: baseline; gap: 5px;
}
.lossmeter__value .u { font-size: .4em; color: var(--accent, var(--green)); letter-spacing: .02em; }
.lossmeter__bar {
  margin-top: 12px; height: 3px; border-radius: 3px;
  background: rgba(255,255,255,.08); overflow: hidden;
}
.lossmeter__bar > i {
  display: block; height: 100%; width: 40%;
  background: var(--accent, var(--green));
  animation: lossSweep calc(2.6s / var(--anim, 1)) ease-in-out infinite;
}
@keyframes lossSweep { 0% { transform: translateX(-100%); } 100% { transform: translateX(350%); } }
@media (prefers-reduced-motion: reduce) { .lossmeter__bar > i { animation: none; } }

/* ---- dark footer ---- */
.footer--dark {
  background:
    radial-gradient(70% 120% at 88% 0%, #1d2734 0%, transparent 55%),
    var(--ink);
  border-top: 0;
  position: relative;
  overflow: hidden;
}
.footer--dark::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: linear-gradient(90deg,
    var(--red) 0 33.34%, var(--amber) 33.34% 66.67%, var(--green) 66.67% 100%);
}
.footer--dark .footer__ghost {
  position: absolute; right: -2%; bottom: -22%;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(140px, 22vw, 300px); line-height: .8; letter-spacing: -.05em;
  color: transparent; -webkit-text-stroke: 1.5px rgba(255,255,255,.06);
  pointer-events: none; user-select: none; z-index: 0;
}
.footer--dark .footer__inner { position: relative; z-index: 1; }
.footer--dark .brand__name { color: #F4F4F1; }
.footer--dark .footer__meta { color: #8b919c; }
.footer--dark .footer__links a { color: #aeb4be; }
.footer--dark .footer__links a:hover { color: #fff; }
.footer--dark .kicker { color: #8b919c; }
.footer--dark .btn--ghost { color: #E7E8E5; border-color: rgba(255,255,255,.22); }
.footer--dark .btn--ghost:hover { border-color: #fff; background: rgba(255,255,255,.06); }

/* ============================================================
   v3 — development-timeline infographic + extra motion
   ============================================================ */

/* ---- development timeline (roadmap infographic) ---- */
.devtl {
  position: relative;
  margin-top: 40px;
  padding: 8px 0 6px;
}

/* the connecting rail behind the nodes */
.devtl__line {
  position: absolute;
  left: 12.5%; right: 12.5%;
  top: 31px;            /* aligns with node center (node 56px tall, centered) */
  height: 4px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
  z-index: 0;
}
.devtl__line > i {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--red) 0%, var(--amber) 36%, var(--green) 70%, #3B5BDB 100%);
  border-radius: 999px;
  transition: width 1.6s cubic-bezier(.45,.05,.2,1);
}
.devtl.in .devtl__line > i { width: 100%; }
/* a shimmer riding the rail */
.devtl__line::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.85), transparent);
  width: 28%; transform: translateX(-120%);
  mix-blend-mode: overlay;
  animation: tlShimmer calc(3.6s / var(--anim,1)) ease-in-out 1.4s infinite;
}
@keyframes tlShimmer { 0% { transform: translateX(-130%);} 55%,100% { transform: translateX(460%);} }

.devtl__row {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.devtl__col { display: grid; justify-items: center; gap: 18px; }

/* node = signal lamp on a dark puck */
.devtl__node {
  width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center;
  background: #15171C;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.08), var(--shadow);
  position: relative;
}
.devtl__node::before { /* pulsing halo ring */
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  border: 2px solid var(--c, var(--green));
  opacity: 0; transform: scale(.8);
}
.devtl.in .devtl__node::before {
  animation: tlHalo calc(2.6s / var(--anim,1)) ease-out infinite;
  animation-delay: var(--d, 0s);
}
@keyframes tlHalo {
  0% { opacity: .55; transform: scale(.78); }
  70%,100% { opacity: 0; transform: scale(1.5); }
}
.devtl__lamp {
  width: 22px; height: 22px; border-radius: 50%;
  background: #2A2D34;
  transition: background .5s ease, box-shadow .5s ease;
  transition-delay: var(--d, 0s);
}
.devtl.in .devtl__lamp {
  background: var(--c, var(--green));
  box-shadow: 0 0 calc(20px * var(--anim,1)) 1px color-mix(in srgb, var(--c) 75%, transparent),
              inset 0 -3px 5px rgba(0,0,0,.3), inset 0 3px 5px rgba(255,255,255,.3);
}

/* card */
.devtl__card {
  position: relative; overflow: hidden;
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  box-shadow: var(--shadow-sm);
  opacity: 0; transform: translateY(16px);
  transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1), box-shadow .25s ease, border-color .25s ease;
  transition-delay: var(--d, 0s);
}
.devtl.in .devtl__card { opacity: 1; transform: none; }
.devtl__card:hover { box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--c) 40%, var(--line)); transform: translateY(-3px); }
.devtl__card::before { /* color cap */
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px;
  background: var(--c, var(--green));
}
.devtl__ghost {
  position: absolute; right: 8px; top: -14px;
  font-family: var(--font-display); font-weight: 700;
  font-size: 86px; line-height: 1; letter-spacing: -.04em;
  color: color-mix(in srgb, var(--c) 12%, transparent);
  pointer-events: none; user-select: none;
}
.devtl__tag {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: color-mix(in srgb, var(--c) 72%, #1a1a17);
  background: color-mix(in srgb, var(--c) 14%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--c) 30%, var(--line));
  padding: 4px 10px; border-radius: 999px;
}
.devtl__tag .d { width: 6px; height: 6px; border-radius: 50%; background: var(--c); }
.devtl__title { font-family: var(--font-display); font-weight: 600; font-size: 24px; margin: 14px 0 8px; letter-spacing: -.02em; }
.devtl__body { color: var(--ink-2); font-size: 14.5px; line-height: 1.55; }
.devtl__meta {
  margin-top: 14px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .04em;
  color: var(--ink-soft); display: inline-flex; align-items: center; gap: 8px;
}
.devtl__meta::before { content: ""; width: 14px; height: 1px; background: var(--c); }

/* vertical rail on narrow screens */
@media (max-width: 820px) {
  .devtl__line { left: 27px; right: auto; top: 0; bottom: 0; width: 4px; height: auto; }
  .devtl__line > i { width: 100% !important; height: 0; transition: height 1.6s cubic-bezier(.45,.05,.2,1);
    background: linear-gradient(180deg, var(--red), var(--amber) 40%, var(--green) 72%, #3B5BDB); }
  .devtl.in .devtl__line > i { height: 100%; }
  .devtl__line::after { display: none; }
  .devtl__row { grid-template-columns: 1fr; gap: 16px; }
  .devtl__col { grid-template-columns: 56px 1fr; justify-items: stretch; align-items: start; gap: 18px; }
  .devtl__ghost { font-size: 64px; top: -8px; }
}

@media (prefers-reduced-motion: reduce) {
  .devtl__line > i { transition: none; width: 100%; }
  .devtl__card { opacity: 1; transform: none; transition: none; }
  .devtl__lamp { background: var(--c); }
  .devtl__node::before, .devtl__line::after { animation: none; }
}

/* ---- soft tricolor tint band (home pillars, etc.) ---- */
.section--band {
  position: relative;
  background:
    radial-gradient(110% 120% at 2% -10%, var(--green-tint) 0%, transparent 46%),
    radial-gradient(110% 120% at 100% 110%, var(--amber-tint) 0%, transparent 46%),
    radial-gradient(90% 120% at 60% 0%, var(--red-tint) 0%, transparent 40%),
    var(--surface-2);
  border-block: 1px solid var(--line);
}

/* ---- floating chips gentle bob (home hero) ---- */
.float-chip { animation: chipBob calc(5s / var(--anim,1)) ease-in-out infinite; }
.float-chip:nth-of-type(2) { animation-delay: -1.6s; }
.float-chip:nth-of-type(3) { animation-delay: -3.1s; }
@keyframes chipBob { 0%,100% { transform: translate(-50%,-50%); } 50% { transform: translate(-50%, calc(-50% - 7px)); } }
@media (prefers-reduced-motion: reduce) { .float-chip { animation: none; } }

/* ============================================================
   v4 — system flowchart (How It Works)  "From frame to decision"
   ============================================================ */
.flow {
  --gut: 0px;
  position: relative;
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.flow__node {
  position: relative;
  width: 100%;
  max-width: 680px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px 22px;
  opacity: 0;
  transform: translateY(18px) scale(.985);
  transition: opacity .55s ease, transform .6s cubic-bezier(.2,.7,.2,1),
              box-shadow .25s ease, border-color .25s ease;
  transition-delay: var(--d, 0s);
  overflow: hidden;
}
.flow.in .flow__node { opacity: 1; transform: none; }
.flow__node:hover { box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--c) 42%, var(--line)); }
.flow__node--wide { max-width: 760px; }
.flow__node::before { /* left color spine */
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px;
  background: var(--c, var(--green));
}
.flow__node::after { /* soft tint wash */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--c) 9%, transparent), transparent 55%);
}
.flow__top { display: flex; align-items: center; gap: 14px; position: relative; z-index: 1; }
.flow__badge {
  flex: none; width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--c) 14%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--c) 32%, var(--line));
  color: color-mix(in srgb, var(--c) 78%, #14130f);
}
.flow__badge svg { width: 24px; height: 24px; display: block; }
.flow__num {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase;
  color: color-mix(in srgb, var(--c) 70%, var(--ink-soft));
}
.flow__name { font-family: var(--font-display); font-weight: 600; font-size: 21px; letter-spacing: -.02em; line-height: 1.1; margin-top: 1px; }
.flow__name .q { font-family: var(--font-mono); font-size: 12px; font-weight: 500; color: var(--ink-soft); margin-left: 8px; letter-spacing: .04em; }
.flow__desc { position: relative; z-index: 1; color: var(--ink-2); font-size: 14.5px; line-height: 1.55; margin-top: 12px; }

/* connector between nodes — flowing line + travelling pulse */
.flow__conn {
  position: relative;
  width: 4px; height: 48px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: visible;
  margin: 2px 0;
  opacity: 0;
  transition: opacity .4s ease;
  transition-delay: var(--d, 0s);
  --c1: var(--green); --c2: var(--green);
}
.flow.in .flow__conn { opacity: 1; }
.flow__conn > i { /* flowing gradient fill */
  position: absolute; inset: 0; border-radius: inherit; overflow: hidden;
  background: linear-gradient(180deg, var(--c1), var(--c2));
}
.flow__conn > i::after {
  content: ""; position: absolute; left: 0; right: 0; height: 40%;
  background: linear-gradient(180deg, transparent, rgba(255,255,255,.9), transparent);
  animation: flowRun calc(1.8s / var(--anim,1)) linear infinite;
  animation-delay: var(--d, 0s);
}
@keyframes flowRun { 0% { top: -45%; } 100% { top: 105%; } }
.flow__conn::after { /* arrowhead */
  content: ""; position: absolute; left: 50%; bottom: -3px; transform: translateX(-50%) rotate(45deg);
  width: 9px; height: 9px;
  border-right: 3px solid var(--c2); border-bottom: 3px solid var(--c2);
  border-radius: 1px;
}
.flow__pulse { /* glowing dot riding the line */
  position: absolute; left: 50%; top: 0; width: 11px; height: 11px; border-radius: 50%;
  transform: translate(-50%,-50%);
  background: #fff;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c2) 60%, transparent), 0 0 12px 2px var(--c2);
  animation: pulseRun calc(1.8s / var(--anim,1)) cubic-bezier(.5,0,.5,1) infinite;
  animation-delay: var(--d, 0s);
}
@keyframes pulseRun {
  0% { top: 2%; opacity: 0; } 12% { opacity: 1; }
  88% { opacity: 1; } 100% { top: 98%; opacity: 0; }
}

/* class chips inside DETECT */
.flow__chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 13px; position: relative; z-index: 1; }
.flow__chip {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .02em;
  padding: 4px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--c) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--c) 26%, var(--line));
  color: var(--ink-2);
}

/* GRADE — congestion matrix */
.flow__matrix { display: grid; gap: 8px; margin-top: 15px; position: relative; z-index: 1; }
.gradeRow {
  display: grid; grid-template-columns: 92px 1fr 132px; align-items: center; gap: 12px;
}
.gradeRow__spd {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: .02em;
  color: var(--ink); text-align: right;
}
.gradeRow__bar { position: relative; height: 22px; border-radius: 7px; background: var(--surface-2); overflow: hidden; }
.gradeRow__bar > span {
  position: absolute; left: 0; top: 0; bottom: 0; width: 0;
  border-radius: 7px;
  background: var(--g);
  transition: width 1s cubic-bezier(.3,.8,.3,1);
  transition-delay: calc(var(--d, 0s) + var(--gd, 0s));
}
.flow.in .gradeRow__bar > span { width: var(--w); }
.gradeRow__bar small {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .03em;
  color: #fff; mix-blend-mode: normal; white-space: nowrap;
  text-shadow: 0 1px 2px rgba(0,0,0,.35); z-index: 1;
}
.gradeRow__act {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; text-transform: uppercase;
  padding: 5px 8px; border-radius: 7px; white-space: nowrap;
  background: color-mix(in srgb, var(--g) 15%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--g) 34%, var(--line));
  color: color-mix(in srgb, var(--g) 80%, #14130f);
}
.gradeRow__act b { font-family: var(--font-display); font-weight: 600; }
.flow__matrixHead {
  display: grid; grid-template-columns: 92px 1fr 132px; gap: 12px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-soft); padding: 0 0 2px;
}
.flow__matrixHead span:first-child { text-align: right; }
.flow__matrixHead span:last-child { text-align: center; }

/* CLAMP — min/max gauge */
.clamp { margin-top: 16px; position: relative; z-index: 1; }
.clamp__track {
  position: relative; height: 38px; border-radius: 10px;
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--green) 22%, var(--surface)) 0%,
    color-mix(in srgb, var(--amber) 22%, var(--surface)) 55%,
    color-mix(in srgb, var(--red) 24%, var(--surface)) 100%);
  border: 1px solid var(--line);
  overflow: hidden;
}
.clamp__fill {
  position: absolute; left: 0; top: 0; bottom: 0; width: 0;
  background: linear-gradient(90deg, var(--green), var(--amber) 60%, var(--red));
  opacity: .9;
  transition: width 1.3s cubic-bezier(.3,.8,.3,1);
  transition-delay: calc(var(--d, 0s) + .2s);
}
.flow.in .clamp__fill { width: 68%; }
.clamp__marker {
  position: absolute; top: -5px; bottom: -5px; width: 3px; left: 68%;
  background: var(--ink);
  box-shadow: 0 0 0 2px var(--surface);
  opacity: 0;
  transition: opacity .3s ease;
  transition-delay: calc(var(--d, 0s) + 1.2s);
}
.flow.in .clamp__marker { opacity: 1; animation: clampBob calc(2.4s / var(--anim,1)) ease-in-out 1.5s infinite; }
@keyframes clampBob { 0%,100% { left: 60%; } 50% { left: 76%; } }
.clamp__lab {
  display: flex; justify-content: space-between; margin-top: 8px;
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .04em; color: var(--ink-soft);
}
.clamp__lab b { color: var(--ink); }

/* feedback loop footer of the flow */
.flow__loop {
  margin-top: 6px;
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px dashed var(--line-2);
  border-radius: 999px; padding: 9px 16px;
  opacity: 0; transform: translateY(8px);
  transition: opacity .5s ease, transform .5s ease;
  transition-delay: var(--d, 0s);
}
.flow.in .flow__loop { opacity: 1; transform: none; }
.flow__loop svg { width: 16px; height: 16px; }
.flow__loop .spin { transform-origin: 50% 50%; animation: loopSpin calc(5s / var(--anim,1)) linear infinite; }
@keyframes loopSpin { to { transform: rotate(360deg); } }
.flow__loop b { color: var(--ink); font-family: var(--font-display); font-weight: 600; }

@media (max-width: 640px) {
  .gradeRow, .flow__matrixHead { grid-template-columns: 74px 1fr; }
  .gradeRow__act { grid-column: 2; justify-self: start; margin-top: -2px; }
  .flow__matrixHead span:last-child { display: none; }
  .flow__name { font-size: 19px; }
}

@media (prefers-reduced-motion: reduce) {
  .flow__node, .flow__conn, .flow__loop { opacity: 1; transform: none; transition: none; }
  .flow__conn > i::after, .flow__pulse, .clamp__marker, .flow__loop .spin { animation: none; }
  .gradeRow__bar > span { width: var(--w); transition: none; }
  .clamp__fill { width: 68%; transition: none; }
  .flow__pulse { display: none; }
}

/* ============================================================
   v5 — horizontal pipeline rail (overrides v4 vertical layout)
   ============================================================ */
.flow { display: block; margin-top: 32px; }

/* the horizontal rail of stage tiles */
.flowrail {
  display: flex;
  align-items: stretch;
  padding: 6px 2px 8px;
}
.flowrail__tile {
  position: relative;
  flex: 1 1 0; min-width: 118px;
  display: flex; flex-direction: column; gap: 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 16px 14px 15px;
  overflow: hidden;
  opacity: 0; transform: translateY(16px) scale(.98);
  transition: opacity .5s ease, transform .55s cubic-bezier(.2,.7,.2,1), box-shadow .25s ease, border-color .25s ease;
  transition-delay: var(--d, 0s);
}
.flow.in .flowrail__tile { opacity: 1; transform: none; }
.flowrail__tile::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--c, var(--green)); }
.flowrail__tile::after { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(130% 80% at 50% 0%, color-mix(in srgb, var(--c) 9%, transparent), transparent 62%); }
.flowrail__tile:hover { box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--c) 40%, var(--line)); }
.flowrail__tile--key {
  border-color: color-mix(in srgb, var(--c) 48%, var(--line));
  box-shadow: 0 12px 30px -14px color-mix(in srgb, var(--c) 60%, transparent), var(--shadow-sm);
}
.flowrail__tile--key::after { background: radial-gradient(130% 95% at 50% 0%, color-mix(in srgb, var(--c) 16%, transparent), transparent 70%); }

.tile__badge {
  width: 40px; height: 40px; border-radius: 11px; position: relative; z-index: 1;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--c) 15%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--c) 34%, var(--line));
  color: color-mix(in srgb, var(--c) 80%, #14130f);
}
.tile__badge svg { width: 21px; height: 21px; display: block; }
.tile__num { position: relative; z-index: 1; font-family: var(--font-mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: color-mix(in srgb, var(--c) 66%, var(--ink-soft)); }
.tile__name { position: relative; z-index: 1; font-family: var(--font-display); font-weight: 600; font-size: 16.5px; line-height: 1.08; letter-spacing: -.01em; }
.tile__desc { position: relative; z-index: 1; font-size: 12px; line-height: 1.42; color: var(--ink-2); }

/* horizontal connector with travelling pulse + right arrowhead */
.flowrail__conn {
  flex: 0 0 30px; align-self: center; position: relative;
  height: 4px; border-radius: 999px; background: var(--surface-2); margin: 0 -1px; z-index: 2;
  --c1: var(--green); --c2: var(--green);
  opacity: 0; transition: opacity .4s ease; transition-delay: var(--d, 0s);
}
.flow.in .flowrail__conn { opacity: 1; }
.flowrail__conn > i { position: absolute; inset: 0; border-radius: inherit; overflow: hidden; background: linear-gradient(90deg, var(--c1), var(--c2)); }
.flowrail__conn > i::after { content: ""; position: absolute; top: 0; bottom: 0; width: 45%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.9), transparent);
  animation: railRun calc(1.7s / var(--anim,1)) linear infinite; animation-delay: var(--d, 0s); }
@keyframes railRun { 0% { left: -50%; } 100% { left: 105%; } }
.flowrail__conn::after { content: ""; position: absolute; right: -2px; top: 50%; transform: translateY(-50%) rotate(-45deg);
  width: 8px; height: 8px; border-right: 3px solid var(--c2); border-bottom: 3px solid var(--c2); border-radius: 1px; }
.flowrail__pulse { position: absolute; top: 50%; left: 0; width: 10px; height: 10px; border-radius: 50%; transform: translate(-50%,-50%);
  background: #fff; box-shadow: 0 0 0 3px color-mix(in srgb, var(--c2) 60%, transparent), 0 0 11px 2px var(--c2);
  animation: railPulse calc(1.7s / var(--anim,1)) cubic-bezier(.5,0,.5,1) infinite; animation-delay: var(--d, 0s); }
@keyframes railPulse { 0% { left: 3%; opacity: 0; } 14% { opacity: 1; } 86% { opacity: 1; } 100% { left: 97%; opacity: 0; } }

/* feedback loop band under the rail */
.flowloop {
  display: flex; align-items: center; gap: 14px; margin-top: 14px;
  opacity: 0; transform: translateY(8px); transition: opacity .5s ease, transform .5s ease; transition-delay: var(--d, 0s);
}
.flow.in .flowloop { opacity: 1; transform: none; }
.flowloop__seg { flex: 1; height: 0; border-top: 2px dashed var(--line-2); position: relative; }
.flowloop__seg--l::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%) rotate(45deg); width: 8px; height: 8px; border-left: 2px solid var(--line-2); border-bottom: 2px solid var(--line-2); }
.flowloop__chip {
  flex: none; display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .03em; color: var(--ink-2);
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 8px 15px;
}
.flowloop__chip b { color: var(--ink); font-family: var(--font-display); font-weight: 600; }
.flowloop__chip .spin { display: grid; color: #3B5BDB; }
.flowloop__chip .spin svg { width: 15px; height: 15px; animation: loopSpin calc(5s / var(--anim,1)) linear infinite; }

/* detail panels below the rail */
.flowgrid { display: grid; grid-template-columns: 1.32fr 1fr; gap: 18px; align-items: start; margin-top: 22px; }
.flowcard {
  position: relative; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm);
  padding: 22px 24px;
  opacity: 0; transform: translateY(18px);
  transition: opacity .55s ease, transform .6s cubic-bezier(.2,.7,.2,1);
  transition-delay: var(--d, 0s);
}
.flow.in .flowcard { opacity: 1; transform: none; }
.flowcard::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--c, var(--amber)); }
.flowcard__h { display: flex; align-items: center; gap: 12px; }
.flowcard__h .flow__badge { width: 40px; height: 40px; }
.flowcard__k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: color-mix(in srgb, var(--c) 66%, var(--ink-soft)); }
.flowcard__t { font-family: var(--font-display); font-weight: 600; font-size: 19px; letter-spacing: -.02em; line-height: 1.1; }
.flowcard__lede { color: var(--ink-2); font-size: 14px; line-height: 1.55; margin-top: 12px; }

@media (max-width: 900px) {
  .flowrail { overflow-x: auto; scroll-snap-type: x proximity; padding-bottom: 12px; }
  .flowrail__tile { flex: 0 0 auto; min-width: 152px; scroll-snap-align: start; }
  .flowrail__conn { flex: 0 0 24px; }
  .flowgrid { grid-template-columns: 1fr; }
}

/* card hover lift accent for pillar cards already covered by .card */
/* (legacy v4 vertical-flow rules below are now unused but harmless) */

/* ============================================================
   v6 — responsive / touch optimisation (phones + tablets)
   Desktop layout is untouched; these rules only engage on small
   viewports or coarse-pointer (touch) devices.
   ============================================================ */

/* 1) never allow sideways scroll from a stray absolutely-positioned element */
html, body { max-width: 100%; overflow-x: hidden; }
img, svg, video, canvas { max-width: 100%; height: auto; }

/* 2) hover affordances only where a real hover pointer exists — on touch,
   :hover would otherwise "stick" after a tap. Movement/glow effects are
   gated so tapping a card on a phone doesn't leave it lifted. */
@media (hover: none) {
  .card:hover { transform: none; }
  .flowrail__tile:hover, .devtl__card:hover, .flow__node:hover { transform: none; }
}
/* keep tap targets comfortable + kill the grey tap flash */
a, button, .btn, .nav__link, .card { -webkit-tap-highlight-color: transparent; }

/* 3) data tables scroll horizontally instead of being clipped by the panel */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.table-scroll .dtable { min-width: 480px; }

/* ---- tablets & large phones ---- */
@media (max-width: 760px) {
  .section { padding-block: clamp(48px, 11vw, 84px); }
  .section--tight { padding-block: clamp(36px, 8vw, 60px); }
  .card { padding: 22px; }
  .panel { border-radius: 12px; }
  /* footer brand column reads first, links below */
  .footer__links { grid-template-columns: 1fr 1fr; }
  /* dev-timeline cards: a touch more breathing room in the vertical rail */
  .devtl__ghost { font-size: 56px; }
}

/* ---- phones ---- */
@media (max-width: 560px) {
  body { font-size: 16px; }
  /* the floating hero chips overflow the stoplight on a narrow screen —
     tuck them in tight against the lamp so nothing spills off-canvas */
  .hero-art { transform: scale(.92); transform-origin: center; }
  .float-chip { transform: translate(-50%, -50%) scale(.8); }
  /* compact tables */
  .dtable { font-size: 13.5px; }
  .dtable th { padding: 10px 12px; }
  .dtable td { padding: 11px 12px; }
  .table-scroll .dtable { min-width: 420px; }
  /* buttons go full-width-ish so they're easy to tap */
  .hero-cta .btn { flex: 1 1 auto; justify-content: center; }
  /* flow detail cards a little tighter */
  .flowcard { padding: 18px 18px; }
  .gradeRow, .flow__matrixHead { grid-template-columns: 64px 1fr; }
  .clamp__lab { font-size: 10.5px; }
  /* loss-globe meters stack on the smallest screens (already at 480 — reinforce) */
}

/* 4) honour notches / safe areas on modern phones */
@supports (padding: max(0px)) {
  .nav__inner { padding-left: max(var(--gutter), env(safe-area-inset-left));
                padding-right: max(var(--gutter), env(safe-area-inset-right)); }
}