@import url('https://api.fontshare.com/v2/css?f[]=clash-display@500,600,700&f[]=general-sans@400,500,600&display=swap');

/* ============================================================
   Mohammad Aziz — Founding Engineer
   Design System
   ============================================================ */

:root {
  /* Surfaces (translucent so the gradient reads through, behind glass) */
  --bg:            #08080b;
  --bg-2:          rgba(17, 17, 23, 0.62);
  --bg-3:          rgba(24, 24, 31, 0.60);
  --bg-elevated:   rgba(34, 34, 44, 0.66);
  --bg-solid-2:    #101015;

  /* Borders */
  --border:        rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --border-faint:  rgba(255, 255, 255, 0.05);

  /* Text */
  --text:          #ffffff;
  --text-2:        rgba(255, 255, 255, 0.65);
  --text-3:        rgba(255, 255, 255, 0.40);
  --text-4:        rgba(255, 255, 255, 0.26);

  /* Accent — Linear-style indigo / violet */
  --accent:        oklch(0.67 0.15 277);
  --accent-bright: oklch(0.76 0.16 277);
  --accent-dim:    oklch(0.60 0.13 277);
  --accent-rgb:    138, 130, 246;
  --accent-glow:   rgba(138, 130, 246, 0.16);
  --accent-line:   rgba(138, 130, 246, 0.55);

  /* Glass */
  --glass-bg:      rgba(255, 255, 255, 0.04);
  --glass-bg-2:    rgba(255, 255, 255, 0.07);
  --glass-border:  rgba(255, 255, 255, 0.10);
  --glass-hi:      rgba(255, 255, 255, 0.14);
  --glass-grad:    linear-gradient(160deg, rgba(255,255,255,0.055), rgba(255,255,255,0.012) 62%);
  --glass-blur:    blur(13px) saturate(130%);

  /* Type */
  --font-display: "Clash Display", "General Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-sans: "General Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Layout */
  --maxw: 1200px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 22px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Glass + intro motion ---------- */
.glass {
  background: var(--glass-grad);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    inset 0 -1px 2px rgba(0,0,0,0.30),
    0 28px 70px -40px rgba(0,0,0,0.92);
}
@keyframes dustIn {
  from { opacity: 0; transform: translateY(16px); filter: blur(12px); }
  to   { opacity: 1; transform: translateY(0);    filter: blur(0); }
}
.dust { opacity: 0; animation: dustIn 1.1s var(--ease-out) both; animation-delay: var(--d, 0ms); }
@media (prefers-reduced-motion: reduce) { .dust { animation: none; opacity: 1; } }

/* ---------- Custom cursor ---------- */
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0; z-index: 9999; pointer-events: none;
  border-radius: 50%; margin-left: -4px; margin-top: -4px;
  mix-blend-mode: difference;
}
.cursor-dot { width: 8px; height: 8px; background: #fff; transition: opacity 0.3s; }
.cursor-ring {
  width: 8px; height: 8px; margin-left: -19px; margin-top: -19px;
  border: 1px solid rgba(255,255,255,0.7); padding: 15px;
  transition: width 0.3s var(--ease), height 0.3s var(--ease), padding 0.3s var(--ease), opacity 0.3s, border-color 0.3s, background 0.3s;
}
.has-cursor, .has-cursor a, .has-cursor button, .has-cursor [data-magnetic] { cursor: none; }
.cursor-hot .cursor-ring { padding: 26px; margin-left: -30px; margin-top: -30px; border-color: rgba(var(--accent-rgb),0.9); background: rgba(var(--accent-rgb),0.08); }
.cursor-hot .cursor-dot { opacity: 0; }
.cursor-down .cursor-ring { padding: 11px; margin-left: -15px; margin-top: -15px; }
@media (pointer: coarse) { .cursor-dot, .cursor-ring { display: none; } }

/* ---------- Page transitions + preloader ---------- */
.pageT {
  position: fixed; inset: 0; z-index: 9000; pointer-events: none;
  background: linear-gradient(180deg, #0c0c15, #08080d);
  transform: translateY(-100%);
  transition: transform 0.62s cubic-bezier(0.76, 0, 0.24, 1);
  will-change: transform;
  display: grid; place-items: center;
}
.pageT__inner { display: flex; flex-direction: column; align-items: center; gap: 16px; opacity: 0; transition: opacity 0.35s ease; }
.pageT__mark {
  font-family: var(--font-display); font-weight: 600; font-size: 1.7rem; letter-spacing: 0.02em; color: #fff;
}
.pageT__bar {
  width: 48px; height: 2px; border-radius: 2px; overflow: hidden;
  background: linear-gradient(90deg, transparent, var(--accent-bright), transparent);
  background-size: 220% 100%; animation: ptbar 1.05s linear infinite;
}
@keyframes ptbar { 0% { background-position: 220% 0; } 100% { background-position: -220% 0; } }

html.pt-loading .pageT { transform: translateY(0); transition: none; }
html.pt-loading .pageT__inner { opacity: 1; }
html.pt-leaving .pageT { transform: translateY(0); pointer-events: all; }
html.pt-leaving .pageT__inner { opacity: 1; transition-delay: 0.12s; }

main { transition: opacity 0.55s var(--ease); }
html.pt-leaving main { opacity: 0; }
html.pt-loading main { opacity: 0; animation: ptSafety 0.01s linear 2.6s forwards; }
@keyframes ptSafety { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .pageT { transition: none; } .pageT__bar { animation: none; } main { transition: none; }
  html.pt-loading main { opacity: 1; animation: none; }
}

/* ---------- Mobile nav menu ---------- */
.nav__menu-btn {
  display: none; width: 42px; height: 42px; border-radius: 11px;
  border: 1px solid var(--glass-border); background: var(--glass-grad);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  cursor: pointer; align-items: center; justify-content: center; flex-direction: column; gap: 5px;
}
.nav__menu-btn span { display: block; width: 17px; height: 1.6px; background: var(--text); border-radius: 2px; transition: transform 0.3s var(--ease), opacity 0.3s; }
.navmenu-open .nav__menu-btn span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.navmenu-open .nav__menu-btn span:nth-child(2) { opacity: 0; }
.navmenu-open .nav__menu-btn span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

.navmenu {
  position: fixed; inset: 0; z-index: 95;
  background: rgba(8,8,12,0.86);
  backdrop-filter: blur(26px) saturate(140%); -webkit-backdrop-filter: blur(26px) saturate(140%);
  display: flex; flex-direction: column; justify-content: center; gap: 6px;
  padding: 0 var(--gutter);
  opacity: 0; visibility: hidden; transform: translateY(-12px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease), visibility 0.4s;
}
.navmenu-open .navmenu { opacity: 1; visibility: visible; transform: none; }
.navmenu a {
  font-family: var(--font-display); font-size: clamp(2.2rem, 11vw, 3.4rem); font-weight: 600;
  letter-spacing: -0.03em; text-transform: uppercase; color: var(--text-2);
  padding: 8px 0; border-bottom: 1px solid var(--border-faint);
  transition: color 0.25s, padding-left 0.3s var(--ease);
  opacity: 0; transform: translateY(14px);
}
.navmenu-open .navmenu a { opacity: 1; transform: none; transition: color 0.25s, padding-left 0.3s var(--ease), opacity 0.5s var(--ease), transform 0.5s var(--ease); }
.navmenu-open .navmenu a:nth-child(1){ transition-delay: 0.08s; }
.navmenu-open .navmenu a:nth-child(2){ transition-delay: 0.14s; }
.navmenu-open .navmenu a:nth-child(3){ transition-delay: 0.20s; }
.navmenu-open .navmenu a:nth-child(4){ transition-delay: 0.26s; }
.navmenu-open .navmenu a:nth-child(5){ transition-delay: 0.32s; }
.navmenu a:hover, .navmenu a.is-active { color: var(--text); padding-left: 10px; }
.navmenu a .x { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-dim); vertical-align: super; margin-left: 8px; -webkit-text-fill-color: var(--accent-dim); }

@media (max-width: 720px) {
  .nav__menu-btn { display: flex; }
}

/* ---------- 3D buttons ---------- */
.btn3d {
  position: relative;
  display: inline-flex; align-items: center; gap: 0.6em;
  font-family: var(--font-sans); font-size: 0.96rem; font-weight: 540; letter-spacing: -0.01em;
  padding: 0.95em 1.5em; border-radius: 13px;
  border: 0; cursor: pointer; color: #0a0a0c; white-space: nowrap;
  background: linear-gradient(180deg, #fdfdff, #dcdce7);
  box-shadow: inset 0 1px 0 #fff, 0 4px 0 #b6b6c4, 0 10px 20px -10px rgba(0,0,0,0.5);
  transition: transform 0.13s var(--ease), box-shadow 0.13s var(--ease);
  will-change: transform;
}
.btn3d:active { transform: translateY(4px); box-shadow: inset 0 1px 0 #fff, 0 0 0 #b6b6c4, 0 5px 12px -8px rgba(0,0,0,0.45); }
.btn3d--accent {
  color: #fff;
  background: linear-gradient(180deg, oklch(0.73 0.16 277), oklch(0.605 0.16 277));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.42), 0 4px 0 oklch(0.47 0.15 277), 0 12px 24px -10px rgba(0,0,0,0.55);
}
.btn3d--accent:active { transform: translateY(4px); box-shadow: inset 0 1px 0 rgba(255,255,255,0.42), 0 0 0 oklch(0.47 0.15 277), 0 6px 14px -8px rgba(0,0,0,0.5); }
.btn3d--ghost {
  color: var(--text);
  background: linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.045));
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 4px 0 rgba(9,9,14,0.92), 0 12px 24px -12px rgba(0,0,0,0.7);
}
.btn3d--ghost:active { transform: translateY(4px); box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 0 rgba(9,9,14,0.92), 0 6px 14px -8px rgba(0,0,0,0.6); }
.btn3d .arr { transition: transform 0.3s var(--ease); }
.btn3d:hover .arr { transform: translateX(4px); }

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: #08080b;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Fallback atmosphere when WebGL shader is unavailable */
.no-shader body, .no-shader body::before {
  content: "";
}
.no-shader body {
  background:
    radial-gradient(1100px 700px at 76% 4%, rgba(var(--accent-rgb), 0.16), transparent 60%),
    radial-gradient(900px 650px at 8% 108%, rgba(var(--accent-rgb), 0.08), transparent 55%),
    #08080b;
}

::selection { background: rgba(var(--accent-rgb), 0.30); color: #fff; }

a { color: inherit; text-decoration: none; }

img, svg { display: block; }

/* ---------- Layout primitives ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}

.section {
  padding-block: clamp(72px, 11vw, 150px);
  position: relative;
}

.section--tight { padding-block: clamp(56px, 8vw, 100px); }

.divider { border: 0; border-top: 1px solid var(--border); }

/* ---------- Type utilities ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px 1px var(--accent-glow);
}
.eyebrow--plain::before { display: none; }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.04;
  max-width: 18ch;
}

.section-lead {
  color: var(--text-2);
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  line-height: 1.6;
  max-width: 56ch;
  text-wrap: pretty;
}

.mono { font-family: var(--font-mono); }

/* ---------- Buttons ---------- */
.btn {
  --pad-y: 0.78em;
  --pad-x: 1.3em;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: var(--pad-y) var(--pad-x);
  font-family: var(--font-sans);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: -0.012em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  isolation: isolate;
  transition: transform 0.45s var(--ease), background 0.3s var(--ease),
              border-color 0.3s var(--ease), color 0.3s var(--ease), box-shadow 0.5s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(0) scale(0.985); }

.btn--primary {
  background: linear-gradient(180deg, #ffffff, #e7e7ee);
  color: #0a0a0c;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.8), 0 8px 24px -12px rgba(0,0,0,0.7);
}
.btn--primary:hover {
  transform: translateY(-1.5px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.9), 0 14px 38px -12px rgba(255,255,255,0.32);
}

.btn--ghost {
  background: var(--glass-grad);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-color: var(--glass-border);
  color: var(--text);
  box-shadow: inset 0 1px 0 var(--glass-hi), inset 0 -1px 2px rgba(0,0,0,0.25);
}
.btn--ghost:hover {
  background: var(--glass-bg-2);
  border-color: var(--border-strong);
  transform: translateY(-1.5px);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 12px 30px -16px rgba(0,0,0,0.7);
}

.btn--accent {
  background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.95), rgba(var(--accent-rgb), 0.72));
  border-color: rgba(var(--accent-rgb), 0.6);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 8px 26px -12px rgba(var(--accent-rgb), 0.6);
}
.btn--accent:hover {
  transform: translateY(-1.5px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.35), 0 16px 40px -12px rgba(var(--accent-rgb), 0.7);
}

.btn .arr { transition: transform 0.4s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(8,8,12,0.6);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--border);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65em;
  font-weight: 540;
  letter-spacing: -0.02em;
  font-size: 0.98rem;
}
.brand__mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  border: 1px solid var(--border-strong);
  background: linear-gradient(150deg, #1c1c1c, #0d0d0d);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-bright);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  padding-left: 0.75em;
  margin-left: 0.25em;
  border-left: 1px solid var(--border);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav__link {
  font-size: 0.9rem;
  color: var(--text-2);
  padding: 0.45em 0.8em;
  border-radius: 7px;
  white-space: nowrap;
  transition: color 0.25s, background 0.25s;
}
.nav__link:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav__link.is-active { color: var(--text); }
.nav__cta { margin-left: 0.5rem; }
.nav__menu-btn { display: none; }

@media (max-width: 720px) {
  .brand__sub { display: none; }
  .nav__links { display: none; }
  .nav__menu-btn { display: flex; }
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding-block: clamp(48px, 7vw, 80px);
  position: relative;
  z-index: 1;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.footer__big {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 580;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 16ch;
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
  margin-bottom: 1.1em;
}
.footer__col a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
  color: var(--text-2);
  font-size: 0.95rem;
  padding: 0.5em 0;
  border-bottom: 1px solid var(--border-faint);
  transition: color 0.25s, padding 0.3s var(--ease);
}
.footer__col a:hover { color: var(--text); padding-left: 0.4em; }
.footer__col a .ext { color: var(--text-4); font-family: var(--font-mono); font-size: 0.78rem; }
.footer__base {
  margin-top: 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
}
@media (max-width: 760px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__big { grid-column: 1 / -1; margin-bottom: 12px; }
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  transition-delay: var(--delay, 0ms);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Diagram primitives (SVG architecture) ---------- */
.diagram { width: 100%; height: auto; overflow: visible; }
.dg-node-box {
  fill: var(--bg-3);
  stroke: var(--border-strong);
  stroke-width: 1;
}
.dg-line {
  stroke: var(--border-strong);
  stroke-width: 1.25;
  fill: none;
}
.dg-line--draw {
  stroke-dasharray: var(--len, 200);
  stroke-dashoffset: var(--len, 200);
  transition: stroke-dashoffset 1.1s var(--ease);
}
.is-in .dg-line--draw { stroke-dashoffset: 0; }
.dg-label {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--text);
}
.dg-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--text-3);
}

/* ---------- Tags / chips ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.01em;
  color: var(--text-2);
  background: rgba(255,255,255,0.025);
  border: 1px solid var(--border);
  padding: 0.4em 0.7em;
  border-radius: 7px;
  white-space: nowrap;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.tag:hover { border-color: var(--border-strong); color: var(--text); }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ============================================================
   FLOW — vertical pipeline diagram (hero, cards, case studies)
   ============================================================ */
.flow {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 18px;
  padding: 6px 0;
}
/* central spine — always visible, with flowing energy */
.flow::before {
  content: "";
  position: absolute;
  top: 14px; bottom: 14px;
  left: 50%;
  width: 2px; margin-left: -1px;
  border-radius: 2px;
  background: linear-gradient(180deg, transparent, rgba(var(--accent-rgb),0.28) 12%, rgba(var(--accent-rgb),0.28) 88%, transparent);
}
.flow::after {
  content: "";
  position: absolute;
  left: 50%; margin-left: -2px;
  width: 4px; height: 64px; top: 14px;
  border-radius: 4px;
  background: linear-gradient(180deg, transparent, var(--accent-bright), transparent);
  box-shadow: 0 0 16px 3px var(--accent-glow);
  filter: blur(0.5px);
  z-index: 1;
  animation: flowEnergy 3.6s cubic-bezier(0.45,0,0.55,1) infinite;
}
@keyframes flowEnergy {
  0%   { top: 8px;  opacity: 0; }
  12%  { opacity: 1; }
  88%  { opacity: 1; }
  100% { top: calc(100% - 70px); opacity: 0; }
}

.flow__node {
  position: relative;
  z-index: 2;
  background: var(--glass-grad);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 13px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 14px 36px -24px rgba(0,0,0,0.9);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), background 0.3s var(--ease);
}
.flow__node:hover { border-color: rgba(var(--accent-rgb), 0.5); transform: translateX(3px); }
.flow__node .ix {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--accent-bright);
  background: rgba(var(--accent-rgb), 0.10);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  width: 26px; height: 26px;
  border-radius: 7px;
  display: grid; place-items: center;
  flex-shrink: 0;
}
.flow__node .nlabel { font-size: 0.92rem; font-weight: 500; letter-spacing: -0.01em; }
.flow__node .nsub { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-3); margin-top: 2px; }
.flow__node .ntext { min-width: 0; }
.flow__node .ndot {
  margin-left: auto;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-glow);
  animation: pulse 2.6s var(--ease) infinite;
  flex-shrink: 0;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.35); }
  70%  { box-shadow: 0 0 0 8px rgba(var(--accent-rgb), 0); }
  100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0); }
}

/* branch row: two nodes side by side */
.flow__branch {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.flow__branch .flow__node { box-shadow: none; }

/* traveling packet (always live) */
.flow__packet {
  position: absolute;
  left: 50%;
  top: 14px;
  width: 7px; height: 7px;
  margin-left: -3.5px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 12px 3px var(--accent-glow);
  z-index: 1;
  opacity: 0;
  animation: packet 3.6s linear infinite 1.8s;
}
@keyframes packet {
  0%   { top: 14px; opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { top: calc(100% - 14px); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .flow::after, .flow__packet, .flow__node .ndot { animation: none; }
  .flow__packet { opacity: 0; }
}