/* ==========================================================================
   It Is Unique Official — Design System
   Premium developer-infrastructure aesthetic.
   Layers: tokens · reset · base · layout · components · utilities · motion
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Color */
  --color-bg:       #f4f4f0;   /* warm off-white */
  --color-surface:  #ffffff;   /* clean cards */
  --color-dark:     #0a0a0b;   /* near-black */
  --color-dark-2:   #141416;   /* raised dark surface */
  --color-text:     #0a0a0b;   /* primary text on light */
  --color-text-inv: #f4f4f0;   /* primary text on dark */
  --color-muted:    #5c5c60;   /* secondary text on light */
  --color-muted-inv:#9a9aa2;   /* secondary text on dark */
  --color-accent:   #b6ff2e;   /* neon green */
  --color-accent-ink:#0a0a0b;  /* text on accent */
  --color-border:   #d9d9d2;   /* fine borders on light */
  --color-border-inv: #2a2a2e; /* fine borders on dark */
  --color-danger:   #ff4d4d;
  --color-success:  #1faa59;

  /* Typography */
  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body:    system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --fs-300: 0.8125rem;   /* 13px */
  --fs-400: 1rem;        /* 16px */
  --fs-500: 1.25rem;     /* 20px */
  --fs-600: 1.5625rem;   /* 25px */
  --fs-700: clamp(1.9rem, 1.2rem + 3vw, 3rem);
  --fs-800: clamp(2.4rem, 1.2rem + 5vw, 4.5rem);
  --fs-900: clamp(3rem, 1rem + 8vw, 7rem);

  --lh-tight: 1.02;
  --lh-snug:  1.2;
  --lh-body:  1.65;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  /* Radius — sharp, architectural by default */
  --radius-sm: 0;
  --radius-md: 0;
  --radius-lg: 0;
  --radius-pill: 0;

  /* Container + fluid gutter */
  --container: 1440px;
  --container-narrow: 820px;
  --gutter: clamp(1.25rem, 4vw, 3rem);   /* 20px → 48px */
  --section-y: clamp(3.5rem, 8vw, 8.5rem); /* 56px → 136px */

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(10,10,11,0.06);
  --shadow-md: 0 8px 30px rgba(10,10,11,0.10);
  --border-1: 1px solid var(--color-border);
  --border-1-inv: 1px solid var(--color-border-inv);

  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 68px;
}

/* --------------------------------------------------------------------------
   2. RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-size: var(--fs-400);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  /* Sticky footer: body fills the viewport, main grows, footer sits at bottom */
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1 0 auto; }
.site-footer { flex-shrink: 0; margin-top: auto; }

img, picture, svg, video { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
ul, ol { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* --------------------------------------------------------------------------
   3. BASE TYPOGRAPHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--lh-snug);
  letter-spacing: -0.02em;
}
.display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-900);
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
  text-transform: uppercase;
}
p { max-width: 68ch; }
strong { font-weight: 600; }
code, kbd, samp, pre { font-family: var(--font-mono); font-size: 0.9em; }
:not(pre) > code {
  background: rgba(10,10,11,0.06);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}
mark { background: var(--color-accent); color: var(--color-accent-ink); padding: 0 0.2em; }
hr { border: none; border-top: var(--border-1); margin: var(--space-6) 0; }

.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-300);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   4. LAYOUT PRIMITIVES
   -------------------------------------------------------------------------- */
.container {
  width: min(100% - (var(--gutter) * 2), var(--container));
  margin-inline: auto;
}
.container--narrow { width: min(100% - (var(--gutter) * 2), var(--container-narrow)); }

.section { padding-block: var(--section-y); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4.5rem); }

.section--dark {
  background: var(--color-dark);
  color: var(--color-text-inv);
}
.section--dark .section-eyebrow { color: var(--color-accent); }
.section--dark a:hover { color: var(--color-accent); }

/* Technical grid background */
.grid-bg {
  position: relative;
  background-image:
    linear-gradient(to right, rgba(10,10,11,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10,10,11,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}
.section--dark.grid-bg {
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-color: var(--color-dark);
}

.stack > * + * { margin-top: var(--space-4); }
.grid { display: grid; gap: var(--space-5); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }

/* --------------------------------------------------------------------------
   5. SECTION HEADERS
   -------------------------------------------------------------------------- */
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-300);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}
.section-eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--color-accent);
}
.section-title {
  font-size: var(--fs-800);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  max-width: 18ch;
}
.section-lead {
  color: var(--color-muted);
  font-size: var(--fs-500);
  max-width: 60ch;
  margin-top: var(--space-4);
}
.section--dark .section-lead { color: var(--color-muted-inv); }
.section-header { margin-bottom: var(--space-7); }

/* --------------------------------------------------------------------------
   6. BUTTONS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-300);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
  min-height: 48px;
  padding: 0.75em 1.5em;
  border: 1px solid var(--color-text);
  border-radius: 0;
  background: transparent;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
/* Secondary (default): outline → fills on hover */
.btn:hover { background: var(--color-text); color: var(--color-bg); }
.btn:active { transform: none; }

/* Primary: black bg / white text → neon green on hover */
.btn--primary {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}
.btn--primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
/* Accent: neon green bg / black text */
.btn--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--accent:hover { filter: brightness(1.08); background: var(--color-accent); color: var(--color-accent-ink); }
/* Dark alias = primary */
.btn--dark {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}
.btn--dark:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--ghost { border-color: var(--color-border); }
.btn--ghost:hover { background: var(--color-text); border-color: var(--color-text); color: var(--color-bg); }

/* Dark-section variants (primary black would vanish on black) */
.section--dark .btn,
.site-footer .btn { border-color: var(--color-border-inv); color: var(--color-text-inv); background: transparent; }
.section--dark .btn:hover,
.site-footer .btn:hover { background: var(--color-text-inv); color: var(--color-dark); border-color: var(--color-text-inv); }
.section--dark .btn--primary,
.site-footer .btn--primary {
  background: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent);
}
.section--dark .btn--primary:hover,
.site-footer .btn--primary:hover { filter: brightness(1.08); background: var(--color-accent); color: var(--color-accent-ink); }

.btn--lg { min-height: 52px; padding: 0.9em 1.8em; font-size: var(--fs-400); }
.btn__arrow { transition: transform var(--transition); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* --------------------------------------------------------------------------
   7. TAGS / BADGES / STATUS
   -------------------------------------------------------------------------- */
.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3em 0.7em;
  border: var(--border-1);
  border-radius: var(--radius-pill);
  color: var(--color-muted);
}
.section--dark .tag { border-color: var(--color-border-inv); color: var(--color-muted-inv); }

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.status__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0 rgba(31,170,89,0.5);
  animation: pulse 2.4s infinite;
}
.status--accent .status__dot { background: var(--color-accent); box-shadow: 0 0 0 0 rgba(182,255,46,0.5); }
.status--warn .status__dot { background: #f5a623; animation: none; }
.status--muted .status__dot { background: var(--color-muted); animation: none; }

/* --------------------------------------------------------------------------
   8. CARDS
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: var(--border-1);
  border-radius: 0;
  padding: clamp(1.25rem, 2vw, 1.75rem);
  transition: border-color var(--transition), background var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.card:hover { border-color: var(--color-text); }
.card__icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border: var(--border-1);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.card__title { font-size: var(--fs-600); margin-bottom: var(--space-2); }
.card__desc { color: var(--color-muted); font-size: var(--fs-400); }
.card__meta {
  margin-top: auto;
  padding-top: var(--space-4);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono); font-size: var(--fs-300);
  color: var(--color-muted);
}
.card__link {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.06em;
  margin-top: var(--space-4);
}
.card__link:hover { color: var(--color-text); }
.card__link:hover .btn__arrow { transform: translateX(3px); }

.section--dark .card {
  background: var(--color-dark-2);
  border-color: var(--color-border-inv);
  color: var(--color-text-inv);
}
.section--dark .card:hover { border-color: var(--color-accent); }
.section--dark .card__desc,
.section--dark .card__meta { color: var(--color-muted-inv); }
.section--dark .card__icon { border-color: var(--color-border-inv); color: var(--color-accent); }

/* --------------------------------------------------------------------------
   9. HEADER / NAV
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: var(--border-1);
  transition: background var(--transition), border-color var(--transition);
}
.site-header[data-scrolled="true"] {
  background: color-mix(in srgb, var(--color-bg) 96%, transparent);
  box-shadow: var(--shadow-sm);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: var(--space-5);
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
  display: inline-flex; align-items: center; gap: 0.6em;
  text-transform: uppercase;
}
.brand__mark {
  width: 26px; height: 26px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: grid; place-items: center;
  color: var(--color-accent-ink);
  font-size: 0.8rem;
}
.nav__links { display: flex; align-items: center; gap: var(--space-5); }
.nav__link {
  font-size: 0.92rem;
  color: var(--color-muted);
  position: relative;
  transition: color var(--transition);
}
.nav__link:hover, .nav__link[aria-current="page"] { color: var(--color-text); }
.nav__link[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 2px; background: var(--color-accent);
}
.nav__actions { display: flex; align-items: center; gap: var(--space-3); }
.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  border: var(--border-1); border-radius: var(--radius-md);
  place-items: center;
}
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}
.nav__toggle span::before { transform: translateY(-6px); }
.nav__toggle span::after { transform: translateY(4px); }
.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after { transform: rotate(-45deg) translateY(-1px); }

/* Mobile menu */
.mobile-menu {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 90;
  background: var(--color-dark); color: var(--color-text-inv);
  transform: translateX(100%);
  transition: transform 260ms cubic-bezier(0.4,0,0.2,1);
  padding: var(--space-6) var(--space-5);
  overflow-y: auto;
  display: flex; flex-direction: column; gap: var(--space-2);
}
.mobile-menu[data-open="true"] { transform: translateX(0); }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--fs-600);
  text-transform: uppercase;
  padding: var(--space-3) 0;
  border-bottom: var(--border-1-inv);
}
.mobile-menu a:hover { color: var(--color-accent); }
.mobile-menu__actions { margin-top: var(--space-5); display: grid; gap: var(--space-3); }
body[data-menu-open="true"] { overflow: hidden; }

/* Skip link */
.skip-link {
  position: absolute; left: 50%; top: -60px; transform: translateX(-50%);
  background: var(--color-dark); color: var(--color-text-inv);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-md);
  z-index: 200; transition: top var(--transition);
}
.skip-link:focus { top: var(--space-2); }

/* --------------------------------------------------------------------------
   10. HERO
   -------------------------------------------------------------------------- */
.hero {
  background: var(--color-bg);
  border-bottom: var(--border-1);
  overflow: hidden;
  position: relative;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-7);
  align-items: center;
  padding-block: var(--space-9);
}
.hero__title {
  font-size: var(--fs-900);
  text-transform: uppercase;
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
}
.hero__title .accent { color: var(--color-accent); -webkit-text-stroke: 1px var(--color-text); }
.hero__lead { color: var(--color-muted); font-size: var(--fs-500); margin-top: var(--space-5); max-width: 52ch; }
.hero__actions { margin-top: var(--space-6); display: flex; flex-wrap: wrap; gap: var(--space-3); }
.hero__stats {
  margin-top: var(--space-7);
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  border-top: var(--border-1); padding-top: var(--space-5);
}
.hero__stat .mono { color: var(--color-muted); display: block; margin-bottom: var(--space-1); }
.hero__stat strong { font-family: var(--font-display); font-size: var(--fs-500); display: block; }

/* Hero infrastructure viz */
.hero__viz {
  position: relative;
  aspect-ratio: 1 / 1;
  border: var(--border-1);
  border-radius: var(--radius-lg);
  background: var(--color-dark);
  overflow: hidden;
}
.hero__viz canvas { width: 100%; height: 100%; display: block; }
.hero__viz-label {
  position: absolute; left: var(--space-4); bottom: var(--space-4);
  font-family: var(--font-mono); font-size: var(--fs-300);
  color: var(--color-muted-inv);
  display: flex; align-items: center; gap: 0.5em;
}

/* --------------------------------------------------------------------------
   11. TECHNOLOGY GRID
   -------------------------------------------------------------------------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  border: var(--border-1);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.tech-cell {
  padding: var(--space-5);
  border-right: var(--border-1);
  border-bottom: var(--border-1);
  display: flex; flex-direction: column; gap: var(--space-1);
  transition: background var(--transition);
}
.tech-cell:hover { background: var(--color-surface); }
.section--dark .tech-cell { border-color: var(--color-border-inv); }
.section--dark .tech-cell:hover { background: var(--color-dark-2); }
.tech-cell__name { font-family: var(--font-display); font-weight: 500; font-size: var(--fs-500); }
.tech-cell__cat { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted); }
.section--dark .tech-cell__cat { color: var(--color-muted-inv); }

/* --------------------------------------------------------------------------
   12. TERMINAL
   -------------------------------------------------------------------------- */
.terminal {
  background: var(--color-dark-2);
  border: var(--border-1-inv);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  color: var(--color-text-inv);
}
.terminal__bar {
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-1-inv);
  font-size: var(--fs-300); color: var(--color-muted-inv);
}
.terminal__dot { width: 11px; height: 11px; border-radius: 50%; background: #444; }
.terminal__dot--r { background: #ff5f57; }
.terminal__dot--y { background: #febc2e; }
.terminal__dot--g { background: #28c840; }
.terminal__body { padding: var(--space-5); font-size: var(--fs-300); line-height: 1.9; }
.terminal__body .ln { display: block; white-space: pre-wrap; }
.terminal__prompt { color: var(--color-accent); }
.terminal__comment { color: var(--color-muted-inv); }
.terminal__cursor {
  display: inline-block; width: 8px; height: 1em; vertical-align: text-bottom;
  background: var(--color-accent); animation: blink 1s step-end infinite;
}

/* --------------------------------------------------------------------------
   13. FORMS
   -------------------------------------------------------------------------- */
.form { display: grid; gap: var(--space-5); }
.field { display: grid; gap: var(--space-2); }
.field label {
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.field .req { color: var(--color-danger); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 0.85em 1em;
  border: var(--border-1);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--color-text);
  box-shadow: 0 0 0 3px rgba(182,255,46,0.4);
}
.field textarea { min-height: 140px; resize: vertical; }
.field__error { color: var(--color-danger); font-size: var(--fs-300); display: none; }
.field[data-invalid="true"] input,
.field[data-invalid="true"] textarea,
.field[data-invalid="true"] select { border-color: var(--color-danger); }
.field[data-invalid="true"] .field__error { display: block; }
.field--honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.form__status {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--fs-400);
  display: none;
}
.form__status[data-state="success"] { display: block; background: rgba(31,170,89,0.12); border: 1px solid var(--color-success); }
.form__status[data-state="error"] { display: block; background: rgba(255,77,77,0.1); border: 1px solid var(--color-danger); }
.form__note { font-size: var(--fs-300); color: var(--color-muted); }

/* Multi-step */
.steps { display: flex; gap: var(--space-2); margin-bottom: var(--space-6); flex-wrap: wrap; }
.step-pip {
  flex: 1 1 60px; min-width: 60px;
  font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em;
  padding-top: var(--space-2);
  border-top: 3px solid var(--color-border);
  color: var(--color-muted);
  transition: border-color var(--transition), color var(--transition);
}
.step-pip[data-active="true"] { border-color: var(--color-accent); color: var(--color-text); }
.step-pip[data-done="true"] { border-color: var(--color-text); }
.form-step { display: none; }
.form-step[data-active="true"] { display: grid; gap: var(--space-5); }
.form-nav { display: flex; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-4); }
.choice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: var(--space-3); }
.choice {
  border: var(--border-1); border-radius: var(--radius-md);
  padding: var(--space-4); cursor: pointer; text-align: left;
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.04em;
  transition: border-color var(--transition), background var(--transition);
}
.choice:hover { border-color: var(--color-text); }
.choice[aria-pressed="true"] { border-color: var(--color-accent); background: rgba(182,255,46,0.12); }

/* --------------------------------------------------------------------------
   14. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-dark);
  color: var(--color-text-inv);
  padding-block: var(--space-8) var(--space-6);
  border-top: 3px solid var(--color-accent);
}
.footer__top { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: var(--space-6); }
.footer__brand .brand { color: var(--color-text-inv); margin-bottom: var(--space-4); }
.footer__tagline { color: var(--color-muted-inv); max-width: 36ch; margin-bottom: var(--space-5); }
.footer__col h3 {
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.footer__col a { display: block; padding: var(--space-2) 0; color: var(--color-muted-inv); transition: color var(--transition); }
.footer__col a:hover { color: var(--color-text-inv); }
.footer__social { display: flex; gap: var(--space-3); margin-top: var(--space-4); }
.footer__social a {
  width: 40px; height: 40px; display: grid; place-items: center;
  border: var(--border-1-inv); border-radius: var(--radius-md);
  transition: border-color var(--transition), color var(--transition);
}
.footer__social a:hover { border-color: var(--color-accent); color: var(--color-accent); }
.footer__bottom {
  margin-top: var(--space-8); padding-top: var(--space-5);
  border-top: var(--border-1-inv);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4);
  font-family: var(--font-mono); font-size: var(--fs-300); color: var(--color-muted-inv);
}
.footer__status { display: inline-flex; align-items: center; gap: 0.5em; }

/* --------------------------------------------------------------------------
   15. BANNERS (announcement + cookie)
   -------------------------------------------------------------------------- */
.announce-banner {
  background: var(--color-accent); color: var(--color-accent-ink);
  font-family: var(--font-mono); font-size: var(--fs-300);
  border-bottom: 1px solid var(--color-accent-ink);
}
.announce-banner[hidden] { display: none; }
.announce-banner__inner { display: flex; align-items: center; gap: var(--space-3); padding-block: var(--space-2); }
.announce-banner__tag { font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.announce-banner__msg { flex: 1; }
.announce-banner__close { width: 28px; height: 28px; display: grid; place-items: center; font-size: 1.2rem; }

.cookie-banner {
  position: fixed; z-index: 120; left: var(--space-4); right: var(--space-4); bottom: var(--space-4);
  max-width: 520px; margin-inline: auto;
  background: var(--color-dark); color: var(--color-text-inv);
  border: var(--border-1-inv); border-radius: var(--radius-lg);
  padding: var(--space-5); box-shadow: var(--shadow-md);
  display: none;
}
.cookie-banner[data-show="true"] { display: block; }
.cookie-banner p { color: var(--color-muted-inv); font-size: var(--fs-300); margin-bottom: var(--space-4); }
.cookie-banner__actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   16. CONTENT / PROSE
   -------------------------------------------------------------------------- */
.prose { max-width: var(--container-narrow); }
.prose > * + * { margin-top: var(--space-4); }
.prose h2 { font-size: var(--fs-700); margin-top: var(--space-7); text-transform: uppercase; }
.prose h3 { font-size: var(--fs-600); margin-top: var(--space-6); }
.prose p, .prose li { color: var(--color-text); line-height: var(--lh-body); }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: var(--space-2); }
.prose a { color: var(--color-text); text-decoration: underline; text-decoration-color: var(--color-accent); text-underline-offset: 3px; }
.prose blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-4); color: var(--color-muted); font-style: italic;
}
.prose img { border-radius: var(--radius-md); border: var(--border-1); }
.prose pre {
  background: var(--color-dark-2); color: var(--color-text-inv);
  padding: var(--space-5); border-radius: var(--radius-md);
  overflow-x: auto; position: relative;
}
.prose pre code { background: none; padding: 0; }
.copy-btn {
  position: absolute; top: var(--space-3); right: var(--space-3);
  font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em;
  border: var(--border-1-inv); border-radius: var(--radius-sm);
  padding: 0.3em 0.6em; color: var(--color-muted-inv);
  transition: color var(--transition), border-color var(--transition);
}
.copy-btn:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* --------------------------------------------------------------------------
   17. DOCS LAYOUT
   -------------------------------------------------------------------------- */
.docs-layout { display: grid; grid-template-columns: 260px 1fr; gap: var(--space-7); align-items: start; }
.docs-sidebar { position: sticky; top: calc(var(--header-h) + var(--space-4)); }
.docs-sidebar h3 { font-family: var(--font-mono); font-size: var(--fs-300); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-muted); margin: var(--space-5) 0 var(--space-2); }
.docs-sidebar a { display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); color: var(--color-muted); font-size: 0.92rem; }
.docs-sidebar a:hover { background: var(--color-surface); color: var(--color-text); }
.docs-sidebar a[aria-current="page"] { background: var(--color-surface); color: var(--color-text); border-left: 2px solid var(--color-accent); }
.docs-toc { position: sticky; top: calc(var(--header-h) + var(--space-4)); font-size: var(--fs-300); }
.docs-toc a { display: block; padding: var(--space-1) 0; color: var(--color-muted); }
.docs-toc a:hover { color: var(--color-text); }
.doc-nav { display: flex; justify-content: space-between; gap: var(--space-4); margin-top: var(--space-8); border-top: var(--border-1); padding-top: var(--space-5); }
.doc-nav a { flex: 1; padding: var(--space-4); border: var(--border-1); border-radius: var(--radius-md); }
.doc-nav a:hover { border-color: var(--color-text); }
.doc-nav .mono { color: var(--color-muted); display: block; }

/* --------------------------------------------------------------------------
   18. MISC PAGE ELEMENTS
   -------------------------------------------------------------------------- */
.page-hero { border-bottom: var(--border-1); padding-block: var(--space-8) var(--space-7); }
.page-hero h1 { font-size: var(--fs-800); text-transform: uppercase; }
.page-hero p { color: var(--color-muted); font-size: var(--fs-500); margin-top: var(--space-4); }

.breadcrumbs { font-family: var(--font-mono); font-size: var(--fs-300); color: var(--color-muted); margin-bottom: var(--space-5); display: flex; flex-wrap: wrap; gap: 0.5em; }
.breadcrumbs a:hover { color: var(--color-text); }
.breadcrumbs .sep { opacity: 0.5; }

.pagination { display: flex; justify-content: center; align-items: center; gap: var(--space-3); margin-top: var(--space-8); font-family: var(--font-mono); font-size: var(--fs-300); }
.pagination a, .pagination span { padding: var(--space-2) var(--space-4); border: var(--border-1); border-radius: var(--radius-md); }
.pagination a:hover { border-color: var(--color-text); }
.pagination .current { background: var(--color-dark); color: var(--color-text-inv); border-color: var(--color-dark); }

.post-meta { font-family: var(--font-mono); font-size: var(--fs-300); color: var(--color-muted); display: flex; flex-wrap: wrap; gap: var(--space-4); }
.post-meta .sep { opacity: 0.4; }

.share { display: flex; gap: var(--space-3); align-items: center; margin-top: var(--space-6); }
.share a { width: 40px; height: 40px; display: grid; place-items: center; border: var(--border-1); border-radius: var(--radius-md); }
.share a:hover { border-color: var(--color-text); }

/* Search */
.search-box { position: relative; }
.search-box input { width: 100%; padding: 1em 1.2em; border: var(--border-1); border-radius: var(--radius-pill); font-family: var(--font-mono); }
.search-results { margin-top: var(--space-6); display: grid; gap: var(--space-3); }
.search-result { border: var(--border-1); border-radius: var(--radius-md); padding: var(--space-4); transition: border-color var(--transition); }
.search-result:hover { border-color: var(--color-text); }
.search-result__kind { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-accent); }
.search-empty { color: var(--color-muted); font-family: var(--font-mono); font-size: var(--fs-300); }

/* 404 */
.error-page {
  display: grid; place-items: center; text-align: center;
  /* Generous top/bottom breathing room so CTAs never touch the footer.
     Body flex (below) pushes the footer to the viewport bottom on tall screens. */
  padding-block: clamp(4rem, 9vw, 8rem);
  min-height: max(48vh, 420px);
}
.error-actions { margin-top: clamp(2rem, 4vw, 3rem); }
.error-code { font-family: var(--font-display); font-size: clamp(6rem, 20vw, 14rem); line-height: 1; color: var(--color-accent); -webkit-text-stroke: 2px var(--color-text); }

/* Feature list */
.feature-list { display: grid; gap: var(--space-3); }
.feature-list li { display: flex; gap: var(--space-3); align-items: baseline; }
.feature-list li::before { content: "▸"; color: var(--color-accent); font-family: var(--font-mono); }

.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--space-5); }
.metric strong { font-family: var(--font-display); font-size: var(--fs-800); display: block; line-height: 1; }
.metric .mono { color: var(--color-muted); }
.section--dark .metric .mono { color: var(--color-muted-inv); }

/* Timeline */
.timeline { border-left: 2px solid var(--color-border); padding-left: var(--space-6); display: grid; gap: var(--space-6); }
.timeline__item { position: relative; }
.timeline__item::before { content: ""; position: absolute; left: calc(-1 * var(--space-6) - 5px); top: 6px; width: 10px; height: 10px; border-radius: 50%; background: var(--color-accent); border: 2px solid var(--color-bg); }
.timeline__year { font-family: var(--font-mono); font-size: var(--fs-300); color: var(--color-muted); }

/* --------------------------------------------------------------------------
   19. UTILITIES
   -------------------------------------------------------------------------- */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.muted { color: var(--color-muted); }
.section--dark .muted { color: var(--color-muted-inv); }
.mt-0 { margin-top: 0; }
.flow > * + * { margin-top: var(--space-5); }
.divider { border-top: var(--border-1); }
.full-bleed { grid-column: 1 / -1; }
.cta-band { text-align: center; }
.cta-band h2 { font-size: var(--fs-800); text-transform: uppercase; max-width: 20ch; margin-inline: auto; }
.cta-band p { margin-inline: auto; margin-top: var(--space-4); }
.cta-band .hero__actions { justify-content: center; }

/* --------------------------------------------------------------------------
   20. MOTION
   -------------------------------------------------------------------------- */
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(31,170,89,0.5); } 70% { box-shadow: 0 0 0 8px rgba(31,170,89,0); } 100% { box-shadow: 0 0 0 0 rgba(31,170,89,0); } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 600ms ease, transform 600ms ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .status__dot { animation: none; }
}

/* --------------------------------------------------------------------------
   21. RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .footer__top { grid-template-columns: 1fr 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .docs-layout { grid-template-columns: 220px 1fr; }
}

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__viz { max-width: 420px; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; border-bottom: var(--border-1); padding-bottom: var(--space-4); }
  .docs-toc { display: none; }
}

@media (max-width: 768px) {
  .nav__links, .nav__actions .btn { display: none; }
  .nav__toggle { display: grid; }
  .nav__actions .nav__toggle { display: grid; }
  .footer__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  :root { --header-h: 60px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; }
  .section { padding-block: var(--space-7); }
  .container { padding-inline: var(--space-4); }
}

/* Container queries for cards where supported */
@supports (container-type: inline-size) {
  .card-grid { container-type: inline-size; }
}

/* ==========================================================================
   22. UPGRADE LAYER — Font Awesome, dropdowns, tabs, filters, hero SVG
   (loaded after base; later rules intentionally refine earlier ones)
   ========================================================================== */

/* ---- Font Awesome sizing within components ---- */
.card__icon i { font-size: 1.15rem; line-height: 1; }
.btn i { font-size: 0.95em; }
.section-eyebrow i { color: var(--color-accent); }
.feature-list li i { color: var(--color-accent); margin-right: 0.2em; }
.feature-list li::before {
  content: "\f00c"; font-family: "Font Awesome 6 Free"; font-weight: 900;
  color: var(--color-accent); font-size: 0.8em;
}

/* ---- Header nav: dropdowns ---- */
.nav__links { gap: var(--space-4); }
.nav__item { position: relative; }
.nav__dropdown-toggle {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-size: 0.92rem; color: var(--color-muted); cursor: pointer;
  font-family: inherit; padding: 0;
}
.nav__dropdown-toggle:hover,
.nav__dropdown-toggle[data-active="true"] { color: var(--color-text); }
.nav__caret { font-size: 0.7em; transition: transform var(--transition); }
.nav__item--has-menu.is-open .nav__caret { transform: rotate(180deg); }

.nav__menu {
  position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%) translateY(6px);
  min-width: 240px;
  background: var(--color-surface);
  border: var(--border-1); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 120;
}
.nav__item--has-menu:hover .nav__menu,
.nav__item--has-menu.is-open .nav__menu {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0);
}
.nav__menu::before { /* hover bridge */
  content: ""; position: absolute; top: -12px; left: 0; right: 0; height: 12px;
}
.nav__menu-link {
  display: flex; align-items: center; gap: 0.7em;
  padding: 0.7em 0.9em; border-radius: var(--radius-md);
  color: var(--color-muted); font-size: 0.92rem;
  transition: background var(--transition), color var(--transition);
}
.nav__menu-link:hover, .nav__menu-link[aria-current="page"] { background: var(--color-bg); color: var(--color-text); }
.nav__menu-icon { width: 1.1em; color: var(--color-accent); text-align: center; }

/* ---- Header toggle (FA icon) ---- */
.nav__toggle { border: var(--border-1); border-radius: var(--radius-md); }
.nav__toggle i { font-size: 1.15rem; color: var(--color-text); }
.nav__toggle span { display: none; } /* legacy hamburger spans no longer used */

/* ---- Mobile menu (refined) ---- */
.mobile-menu {
  padding: var(--space-5) var(--space-5) var(--space-8);
  gap: 0;
}
.mobile-menu__list { display: flex; flex-direction: column; width: 100%; }
.mobile-menu__link, .mobile-menu__toggle, .mobile-menu__submenu a {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
.mobile-menu__link, .mobile-menu__toggle {
  display: flex; align-items: center; justify-content: space-between; gap: 0.6em;
  width: 100%; text-align: left;
  font-size: var(--fs-500);
  padding: var(--space-4) 0;
  border-bottom: var(--border-1-inv);
  color: var(--color-text-inv);
}
.mobile-menu__toggle { font-family: var(--font-display); cursor: pointer; }
.mobile-menu__link span, .mobile-menu__toggle > span { display: inline-flex; align-items: center; gap: 0.6em; }
.mobile-menu__icon { color: var(--color-accent); width: 1.2em; text-align: center; font-size: 0.9em; }
.mobile-menu__caret { font-size: 0.7em; transition: transform var(--transition); }
.mobile-menu__group.is-open .mobile-menu__caret { transform: rotate(180deg); }
.mobile-menu__submenu { padding: var(--space-2) 0 var(--space-3) var(--space-5); }
.mobile-menu__submenu a {
  display: flex; align-items: center; gap: 0.6em;
  font-size: 1rem; padding: var(--space-3) 0; color: var(--color-muted-inv);
  text-transform: none; font-family: var(--font-body);
}
.mobile-menu__submenu a:hover { color: var(--color-accent); }
.mobile-menu__overlay {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 80;
  background: rgba(10,10,11,0.5); backdrop-filter: blur(2px);
}
.mobile-menu__actions { display: grid; gap: var(--space-3); margin-top: var(--space-6); }
.mobile-menu__actions .btn {
  border: 1px solid var(--color-border-inv);
  font-family: var(--font-mono); font-size: var(--fs-300);
  padding: 0.9em 1.4em; justify-content: center; color: var(--color-text-inv);
}
.mobile-menu__actions .btn--primary {
  border-color: var(--color-accent); background: var(--color-accent); color: var(--color-accent-ink);
}
body.is-menu-open { overflow: hidden; }

/* ---- Hero meta chips + SVG viz ---- */
.hero__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-6);
}
.hero__meta li {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.4em 0.8em; border: var(--border-1); border-radius: var(--radius-pill);
  color: var(--color-muted);
}
.hero__meta li i { color: var(--color-accent); }

.hero__viz {
  aspect-ratio: auto;
  display: flex; flex-direction: column;
  padding: var(--space-4);
  gap: var(--space-3);
}
.hero__viz-head, .hero__viz-foot {
  display: flex; align-items: center; justify-content: space-between;
  color: var(--color-muted-inv); font-size: var(--fs-300);
}
.hero__viz-foot { border-top: var(--border-1-inv); padding-top: var(--space-3); }
.hero__viz-foot i { color: var(--color-accent); margin-right: 0.3em; }
.infra { width: 100%; height: auto; flex: 1; }
.infra__node rect {
  fill: var(--color-dark); stroke: var(--color-border-inv); stroke-width: 1.5;
  transition: stroke var(--transition);
}
.infra__node text { fill: var(--color-muted-inv); text-anchor: middle; letter-spacing: 0.08em; }
.infra__node--hub rect { stroke: var(--color-accent); }
.infra__node--hub text { fill: var(--color-text-inv); }
.infra__node--ai rect { stroke: var(--color-accent); }
.infra__node--ai text { fill: var(--color-accent); }
.infra__link {
  stroke-dasharray: 6 6;
  animation: dashflow 2.2s linear infinite;
}
.infra__node--hub rect { animation: nodepulse 3s ease-in-out infinite; }
@keyframes dashflow { to { stroke-dashoffset: -24; } }
@keyframes nodepulse {
  0%,100% { filter: drop-shadow(0 0 0 rgba(182,255,46,0)); }
  50% { filter: drop-shadow(0 0 6px rgba(182,255,46,0.5)); }
}

/* ---- Tabs (Solutions) ---- */
.tabs__list {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  border-bottom: var(--border-1); padding-bottom: var(--space-4); margin-bottom: var(--space-6);
}
.section--dark .tabs__list { border-color: var(--color-border-inv); }
.tabs__tab {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.7em 1.1em; border: var(--border-1); border-radius: var(--radius-pill);
  color: var(--color-muted); cursor: pointer; min-height: 44px;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.section--dark .tabs__tab { border-color: var(--color-border-inv); }
.tabs__tab:hover { color: var(--color-text); border-color: var(--color-text); }
.section--dark .tabs__tab:hover { color: var(--color-text-inv); border-color: var(--color-text-inv); }
.tabs__tab i { color: var(--color-accent); }
.tabs__tab[aria-selected="true"] {
  background: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink);
}
.tabs__tab[aria-selected="true"] i { color: var(--color-accent-ink); }
.tabs__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.tabs__block {
  border: var(--border-1); border-radius: var(--radius-lg); padding: var(--space-5);
  background: var(--color-surface);
}
.section--dark .tabs__block { background: var(--color-dark-2); border-color: var(--color-border-inv); }
.tabs__label {
  display: inline-flex; align-items: center; gap: 0.5em;
  color: var(--color-muted); margin-bottom: var(--space-3);
}
.section--dark .tabs__label { color: var(--color-muted-inv); }
.tabs__label i { color: var(--color-accent); }
.tabs__panel { animation: fadein 260ms ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---- Accordion ---- */
.accordion__item { border: var(--border-1); border-radius: var(--radius-md); margin-bottom: var(--space-3); overflow: hidden; }
.accordion__trigger {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  width: 100%; text-align: left; padding: var(--space-4) var(--space-5);
  font-family: var(--font-display); font-size: var(--fs-500); cursor: pointer; min-height: 44px;
}
.accordion__trigger i { transition: transform var(--transition); color: var(--color-accent); }
.accordion__item.is-open .accordion__trigger i { transform: rotate(180deg); }
.accordion__panel { padding: 0 var(--space-5) var(--space-5); color: var(--color-muted); }

/* ---- Filter bar ---- */
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.filter-btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 0.65em 1.1em; border: var(--border-1); border-radius: var(--radius-pill);
  color: var(--color-muted); cursor: pointer; min-height: 44px;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.filter-btn i { color: var(--color-accent); }
.filter-btn:hover { color: var(--color-text); border-color: var(--color-text); }
.filter-btn[aria-pressed="true"] { background: var(--color-dark); color: var(--color-text-inv); border-color: var(--color-dark); }
.filter-btn[aria-pressed="true"] i { color: var(--color-accent); }
.filter-item { display: block; }

/* ---- Role cards (careers) ---- */
.role-card { flex-direction: row; align-items: center; justify-content: space-between; gap: var(--space-5); }
.role-card__main { display: flex; gap: var(--space-4); align-items: flex-start; }
.role-card .card__icon { margin-bottom: 0; flex-shrink: 0; }

/* ---- Prose anchor links ---- */
.prose h2, .prose h3 { position: relative; }
.anchor {
  opacity: 0; margin-left: 0.4em; color: var(--color-muted);
  text-decoration: none; transition: opacity var(--transition);
}
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }

/* ---- Footer: multi-column ---- */
.footer__top { grid-template-columns: 1.3fr 2.7fr; align-items: start; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.footer__contact { display: grid; gap: var(--space-2); margin: var(--space-4) 0 var(--space-5); font-size: 0.9rem; }
.footer__contact li { display: flex; align-items: center; gap: 0.6em; color: var(--color-muted-inv); }
.footer__contact li i { color: var(--color-accent); width: 1.1em; text-align: center; }
.footer__contact a { color: var(--color-muted-inv); }
.footer__contact a:hover { color: var(--color-text-inv); }
.footer__version { font-family: var(--font-mono); color: var(--color-accent); }

/* ---- TOC active ---- */
.docs-toc a[aria-current="true"] { color: var(--color-text); border-left: 2px solid var(--color-accent); padding-left: var(--space-2); }

/* ==========================================================================
   23. UPGRADE LAYER — responsive refinements
   ========================================================================== */
@media (max-width: 1024px) {
  .nav__links { display: none; }
  .nav__actions .btn { display: none; }
  .nav__toggle { display: grid; }
  .footer__top { grid-template-columns: 1fr; gap: var(--space-7); }
}
@media (max-width: 900px) {
  .tabs__grid { grid-template-columns: 1fr; }
  .role-card { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 768px) {
  .footer__cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer__cols { grid-template-columns: 1fr 1fr; }
  .filter-bar { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; padding-bottom: var(--space-2); }
  .filter-btn { flex: 0 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  .infra__link, .infra__node--hub rect { animation: none !important; }
  .tabs__panel { animation: none; }
}

/* ==========================================================================
   24. REFINEMENT LAYER — branding, grid, spacing, About, sharp UI
   ========================================================================== */

/* ---- Brand wordmark ---- */
.brand { font-size: clamp(0.9rem, 0.8rem + 0.4vw, 1.05rem); gap: 0.55em; }
.brand__mark {
  width: auto; height: auto; padding: 0.34em 0.46em; line-height: 1;
  font-family: var(--font-mono); font-weight: 700; font-size: 0.72rem;
  letter-spacing: 0.06em; border-radius: 0; color: var(--color-accent-ink);
  background: var(--color-accent);
}
.brand__name { white-space: nowrap; }
.footer__brand .brand__name { white-space: normal; }
/* Official logo image */
.brand__logo {
  height: clamp(30px, 3.4vw, 42px);
  width: auto; max-width: 100%;
  object-fit: contain; display: block;
}
.footer__brand .brand__logo { height: 52px; }
@media (max-width: 360px) { .brand__logo { height: 28px; } }
@media (max-width: 360px) {
  .brand__name { font-size: 0.8rem; letter-spacing: -0.01em; }
}

/* ---- Header: solid, no glass ---- */
.site-header {
  background: var(--color-bg);
  backdrop-filter: none;
}
.site-header[data-scrolled="true"] {
  background: var(--color-bg);
  border-bottom-color: var(--color-text);
}

/* ---- Tags: sharp technical labels ---- */
.tag { border-radius: 0; }

/* ---- 12-column responsive grid utility ---- */
.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 2rem);
}
@media (max-width: 1024px) { .grid12 { grid-template-columns: repeat(8, minmax(0, 1fr)); } }
@media (max-width: 768px)  { .grid12 { grid-template-columns: repeat(6, minmax(0, 1fr)); } }
@media (max-width: 480px)  { .grid12 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; } }

/* ---- Section header rhythm ---- */
.section-header { margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section-lead { max-width: 62ch; }
.prose p, .prose li { max-width: 65ch; }

/* ---- Sharp images ---- */
.prose img, .card img, .media img { border-radius: 0; }
.media img { width: 100%; height: auto; object-fit: cover; display: block; }

/* ---- Two-column page hero (About etc.) ---- */
.hero-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
@media (max-width: 900px) { .hero-split { grid-template-columns: 1fr; } }

/* ---- Pillar list (Mission / Vision / Values) — borders, not big cards ---- */
.pillar-list { border-top: var(--border-1); }
.pillar {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: var(--space-4);
  padding: clamp(1.25rem, 2.5vw, 2rem) 0;
  border-bottom: var(--border-1);
}
.pillar__num {
  font-family: var(--font-mono); font-size: var(--fs-500);
  color: var(--color-accent); font-weight: 700;
}
.pillar__eyebrow {
  font-family: var(--font-mono); font-size: var(--fs-300);
  text-transform: uppercase; letter-spacing: 0.14em; color: var(--color-muted);
  display: block; margin-bottom: var(--space-2);
}
.pillar__title { font-size: var(--fs-600); text-transform: uppercase; margin-bottom: var(--space-2); }
.pillar__desc { color: var(--color-muted); }
.section--dark .pillar-list { border-color: var(--color-border-inv); }
.section--dark .pillar { border-color: var(--color-border-inv); }
.section--dark .pillar__desc, .section--dark .pillar__eyebrow { color: var(--color-muted-inv); }
@media (max-width: 480px) { .pillar { grid-template-columns: 1fr; gap: var(--space-2); } }

/* ---- Value cards use icon + sharp border ---- */
.value-card .card__icon { color: var(--color-text); }

/* ---- Page hero spacing polish ---- */
.page-hero { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(2rem, 4vw, 3rem); }
.page-hero h1 { max-width: 20ch; }
.page-hero p { max-width: 60ch; }

/* ==========================================================================
   25. CONTENT LAYOUT — main content + optional sidebar (products/services/
   case studies). Main is ALWAYS the dominant column and comes first in the
   DOM; the sidebar is a narrow track that only exists when content is present.
   Mobile-first: single column by default, two columns from 992px.
   ========================================================================== */
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
}
.content-grid > .prose { max-width: 100%; width: 100%; }
.content-grid:not(.has-aside) > .prose { max-width: 900px; }
.content-aside { width: 100%; }

@media (min-width: 992px) {
  .content-grid.has-aside {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  }
  .content-grid.has-aside .content-aside {
    position: sticky;
    top: calc(var(--header-h) + var(--space-4));
  }
}

/* ==========================================================================
   26. MOBILE NAVIGATION OVERHAUL — compact, professional, touch-friendly
   (Appended last: authoritative over earlier .mobile-menu rules.)
   ========================================================================== */
.mobile-menu {
  padding: var(--space-4) var(--space-5) var(--space-7);
  gap: 0;
}
.mobile-menu__nav { width: 100%; }
.mobile-menu__list { display: flex; flex-direction: column; width: 100%; gap: 0; }

/* Rows: icon + label + chevron. Body font, ~52px, not heading typography. */
.mobile-menu .mobile-menu__link,
.mobile-menu .mobile-menu__toggle {
  display: flex; align-items: center; gap: 0.85rem;
  width: 100%; text-align: left;
  min-height: 52px; padding: 0.6rem 0.15rem;
  font-family: var(--font-body); font-weight: 500;
  font-size: 1rem; line-height: 1.3; letter-spacing: 0; text-transform: none;
  color: var(--color-text-inv);
  border-bottom: 1px solid var(--color-border-inv);
  background: none; cursor: pointer;
}
.mobile-menu .mm-icon {
  flex: 0 0 auto; width: 1.5rem; text-align: center;
  color: var(--color-accent); font-size: 1.05rem;
}
.mobile-menu .mm-icon--sm { font-size: 0.9rem; }
.mobile-menu .mm-label { flex: 1 1 auto; min-width: 0; }
.mobile-menu .mm-go,
.mobile-menu .mm-caret {
  flex: 0 0 auto; color: var(--color-muted-inv); font-size: 0.8rem;
  transition: transform var(--transition);
}
.mobile-menu .mobile-menu__link[aria-current="page"] .mm-label,
.mobile-menu .mobile-menu__toggle[data-active="true"] .mm-label { color: var(--color-accent); }
.mobile-menu__group.is-open .mm-caret { transform: rotate(180deg); }

/* Accordion submenu */
.mobile-menu .mobile-menu__submenu { padding: 0.15rem 0 0.5rem 2.35rem; list-style: none; margin: 0; }
.mobile-menu .mobile-menu__sublink {
  display: flex; align-items: center; gap: 0.7rem;
  min-height: 44px; padding: 0.45rem 0;
  font-family: var(--font-body); font-weight: 400; font-size: 0.95rem;
  text-transform: none; letter-spacing: 0; border-bottom: 0;
  color: var(--color-muted-inv);
}
.mobile-menu .mobile-menu__sublink:hover,
.mobile-menu .mobile-menu__sublink[aria-current="page"] { color: var(--color-accent); }
.mobile-menu .mobile-menu__sublink .mm-icon { color: var(--color-muted-inv); width: 1.2rem; }

/* CTAs */
.mobile-menu__actions { display: grid; gap: 0.6rem; margin-top: var(--space-5); }
.mobile-menu__actions .btn {
  min-height: 48px; font-size: var(--fs-300); justify-content: center;
  border: 1px solid var(--color-border-inv); color: var(--color-text-inv);
  text-transform: uppercase; font-family: var(--font-mono);
}
.mobile-menu__actions .btn--primary {
  background: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent);
}

/* Compact social row */
.mobile-menu__social { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-top: var(--space-5); }
.mobile-menu__social a {
  width: 44px; height: 44px; display: grid; place-items: center;
  border: 1px solid var(--color-border-inv); color: var(--color-text-inv);
  font-size: 1rem;
}
.mobile-menu__social a:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---- Announcement bar: responsive wrap, keep close accessible ---- */
@media (max-width: 600px) {
  .announce-banner__inner { flex-wrap: wrap; padding-block: var(--space-2); gap: var(--space-2); }
  .announce-banner__tag { flex: 0 0 auto; }
  .announce-banner__msg { flex: 1 1 auto; min-width: 0; }
  .announce-banner__close { flex: 0 0 auto; margin-left: auto; }
}