/* ============================================================
   Lumengrid — design system
   Dark, premium, technical. Original palette (violet/indigo),
   system font stack, pure-CSS motion. No copied assets.
   ============================================================ */

@font-face {
  font-family: "InterVariable";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/inter-latin-wght.woff2") format("woff2-variations");
}

:root {
  --bg: #07070d;
  --bg-2: #0c0c16;
  --surface: #12121f;
  --surface-2: #181828;
  --border: #24243a;
  --border-soft: #1c1c2e;
  --text: #ecebf4;
  --text-muted: #a3a2bd;
  --text-dim: #8a89a8;
  --accent: #8b5cf6;
  --accent-2: #c084fc;
  --accent-3: #22d3ee;
  --grad: linear-gradient(135deg, #8b5cf6 0%, #c084fc 55%, #22d3ee 130%);
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 20px 60px -20px rgba(139, 92, 246, 0.28);
  --font: "InterVariable", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --max: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* grain overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ambient glow blobs */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(600px 400px at 15% -5%, rgba(139, 92, 246, 0.16), transparent 65%),
    radial-gradient(700px 500px at 90% 10%, rgba(34, 211, 238, 0.08), transparent 60%),
    radial-gradient(800px 600px at 50% 110%, rgba(192, 132, 252, 0.1), transparent 65%);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
ul { list-style: none; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
h1 { font-size: clamp(2.4rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.2rem; }
p { color: var(--text-muted); }
.lead { font-size: 1.15rem; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(7, 7, 13, 0.82);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.01em; }
.brand .mark { width: 30px; height: 30px; }
.nav-links { display: flex; align-items: center; gap: 6px; flex: 1; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 13px;
  border-radius: 9px;
  font-weight: 550;
  font-size: 0.95rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.nav-link:hover, .nav-item:hover > .nav-link, .nav-link.active { color: var(--text); background: var(--surface); }
.nav-link .chev { width: 12px; height: 12px; opacity: 0.6; transition: transform 0.2s; }
.nav-item:hover .chev { transform: rotate(180deg); }
.nav-drop {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 240px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.16s, transform 0.16s, visibility 0.16s;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.7);
}
.nav-item:hover .nav-drop { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-drop a {
  display: block;
  padding: 8px 12px;
  border-radius: 7px;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.nav-drop a:hover { color: var(--text); background: var(--surface-2); }
.nav-drop .drop-label {
  padding: 6px 12px 2px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-dim);
}
.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.nav-burger { display: none; background: none; border: 1px solid var(--border); border-radius: 9px; padding: 8px 10px; cursor: pointer; color: var(--text); }

/* mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(7, 7, 13, 0.98);
  padding: 90px 24px 40px;
  overflow-y: auto;
}
.mobile-nav.open { display: block; }
.mobile-nav a.m-link {
  display: block;
  padding: 14px 4px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
}
.mobile-nav .m-group { margin-top: 10px; }
.mobile-nav .m-group > .m-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  padding: 14px 4px 4px;
}
.mobile-nav a.m-sub { display: block; padding: 8px 4px 8px 16px; color: var(--text-muted); font-size: 0.98rem; }

/* ---------- buttons & badges ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s, border-color 0.15s;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 26px 70px -18px rgba(139, 92, 246, 0.5); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-2); transform: translateY(-2px); }
.btn .arr { transition: transform 0.15s; }
.btn:hover .arr { transform: translateX(3px); }

.badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid rgba(139, 92, 246, 0.4);
  background: rgba(139, 92, 246, 0.12);
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.badge--cyan { border-color: rgba(34, 211, 238, 0.4); background: rgba(34, 211, 238, 0.1); color: var(--accent-3); }

.kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 14px;
}

/* ---------- hero ---------- */
.hero { position: relative; padding: 110px 0 90px; overflow: hidden; }
.hero--compact { padding: 80px 0 60px; }
.hero h1 { margin-bottom: 20px; max-width: 17em; }
.hero .lead { max-width: 40em; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { margin-top: 56px; }

.hero-chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero-chip b { color: var(--accent-2); font-weight: 600; }

/* hero visual (pure SVG-ish CSS chip) */
.hero-visual { position: relative; }
.chip-svg { width: 100%; max-width: 560px; margin: 0 auto; filter: drop-shadow(0 30px 60px rgba(139, 92, 246, 0.25)); }
.chip-glow {
  position: absolute; inset: 12%; border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.35), transparent 70%);
  filter: blur(30px); z-index: -1;
}

/* ---------- sections ---------- */
.section { padding: 84px 0; }
.section--tight { padding: 48px 0; }
.section--muted { background: var(--bg-2); border-block: 1px solid var(--border-soft); }
.section-head { max-width: 42em; margin-bottom: 48px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 { margin-bottom: 12px; }
.section-head p { font-size: 1.05rem; }
.center { text-align: center; }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-hero { grid-template-columns: 1.15fr 0.85fr; align-items: center; gap: 60px; }

/* ---------- cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.18s, transform 0.18s;
}
a.card:hover, .card--link:hover { border-color: rgba(139, 92, 246, 0.55); transform: translateY(-4px); }
.card .icon {
  width: 44px; height: 44px; border-radius: 11px;
  display: grid; place-items: center;
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid rgba(139, 92, 246, 0.3);
  margin-bottom: 18px;
}
.card .icon svg { width: 22px; height: 22px; stroke: var(--accent-2); }
.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.94rem; }
.card .more { margin-top: 16px; font-size: 0.9rem; font-weight: 600; color: var(--accent-2); display: inline-flex; align-items: center; gap: 6px; }
.card .tag { font-family: var(--mono); font-size: 0.74rem; color: var(--text-dim); margin-bottom: 10px; display: block; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { padding: 26px; border: 1px solid var(--border-soft); border-radius: var(--radius); background: var(--bg-2); }
.stat b { display: block; font-size: 1.9rem; letter-spacing: -0.03em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 6px; }
.stat span { font-size: 0.88rem; color: var(--text-muted); }

/* ---------- logo wall ---------- */
.logo-wall { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.logo-track { display: flex; gap: 56px; width: max-content; animation: marquee 30s linear infinite; }
.logo-track .logo-item { color: var(--text-dim); font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em; white-space: nowrap; display: flex; align-items: center; gap: 8px; }
.logo-item::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); opacity: 0.5; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- spec table ---------- */
.spec-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.spec-table th, .spec-table td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--border-soft); }
.spec-table th { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); background: var(--bg-2); }
.spec-table td:first-child { font-weight: 600; color: var(--text); }
.spec-table tr:hover td { background: rgba(139, 92, 246, 0.05); }
.spec-table .hl td { background: rgba(139, 92, 246, 0.1); }

/* ---------- pricing-ish chips / compare ---------- */
.compare { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.compare .item { border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 22px; background: var(--surface); }
.compare .item.hot { border-color: rgba(139, 92, 246, 0.6); box-shadow: var(--shadow); }
.compare .item .name { font-weight: 700; font-size: 1.1rem; }
.compare .item .sub { font-family: var(--mono); font-size: 0.78rem; color: var(--text-dim); margin: 4px 0 14px; }
.compare .item dl { margin: 0; }
.compare .item dt { font-size: 0.76rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 10px; }
.compare .item dd { font-size: 0.95rem; font-weight: 600; }

/* ---------- CTA banner ---------- */
.cta { padding: 70px 0; }
.cta-box {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  padding: 60px 56px;
  background: linear-gradient(135deg, #14102a 0%, #0c0c16 60%);
  border: 1px solid rgba(139, 92, 246, 0.35);
  text-align: center;
}
.cta-box::before {
  content: "";
  position: absolute; inset: -40%;
  background: radial-gradient(circle at 30% 20%, rgba(139, 92, 246, 0.4), transparent 45%),
              radial-gradient(circle at 75% 80%, rgba(34, 211, 238, 0.25), transparent 45%);
  z-index: 0;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 { margin-bottom: 14px; }
.cta-box p { max-width: 34em; margin: 0 auto 30px; }

/* ---------- breadcrumbs ---------- */
.crumbs { font-family: var(--mono); font-size: 0.78rem; color: var(--text-dim); margin-bottom: 22px; }
.crumbs a { color: var(--text-dim); }
.crumbs a:hover { color: var(--accent-2); }
.crumbs span.sep { margin: 0 8px; opacity: 0.5; }

/* ---------- blog / events / glossary ---------- */
.blog-card .meta, .event-card .meta { font-family: var(--mono); font-size: 0.76rem; color: var(--text-dim); margin-bottom: 10px; }
.blog-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.blog-card h3 a:hover { color: var(--accent-2); }
.event-card .when { font-family: var(--mono); font-size: 0.85rem; color: var(--accent-2); margin-bottom: 8px; }

.search-box { display: flex; gap: 12px; margin-bottom: 36px; max-width: 480px; }
.search-box input {
  flex: 1; padding: 13px 18px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-size: 0.95rem; outline: none;
}
.search-box input:focus { border-color: var(--accent); }

.glossary-term { border-bottom: 1px solid var(--border-soft); padding: 18px 4px; display: grid; grid-template-columns: 240px 1fr; gap: 24px; }
.glossary-term h3 { font-family: var(--mono); font-size: 0.98rem; }
.glossary-term h2 { font-family: var(--mono); font-size: 0.98rem; }
.glossary-term p { font-size: 0.95rem; }
.glossary-term.hidden { display: none; }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 40px; }
.toc a { font-family: var(--mono); font-size: 0.8rem; padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--text-muted); }
.toc a:hover { border-color: var(--accent); color: var(--accent-2); }

/* ---------- forms ---------- */
form.f { display: grid; gap: 18px; max-width: 620px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.f label { font-size: 0.86rem; font-weight: 600; display: block; margin-bottom: 7px; }
.f input, .f select, .f textarea {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-size: 0.95rem; font-family: var(--font); outline: none;
}
.f input:focus, .f select:focus, .f textarea:focus { border-color: var(--accent); }
.f textarea { min-height: 140px; resize: vertical; }

/* ---------- misc ---------- */
.checklist li { padding-left: 28px; position: relative; margin-bottom: 10px; color: var(--text-muted); }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 7px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--grad); opacity: 0.9;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3.2 3.2L13 4.5' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 8.5l3.2 3.2L13 4.5' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat;
}
.prose { max-width: 46em; }
.prose h3 { margin: 30px 0 10px; }
.prose h2 { margin: 34px 0 10px; font-size: 1.5rem; }
.prose p, .prose li { margin-bottom: 14px; }
.prose li { padding-left: 20px; position: relative; color: var(--text-muted); }
.prose li::before { content: "—"; position: absolute; left: 0; color: var(--accent-2); }
.legal p { margin-bottom: 14px; max-width: 52em; }
.legal h2 { font-size: 1.3rem; margin: 34px 0 12px; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--border-soft); background: var(--bg-2); padding: 70px 0 40px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 36px; }
.footer h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-dim); margin-bottom: 16px; }
.footer a { display: block; padding: 5px 0; color: var(--text-muted); font-size: 0.92rem; }
.footer a:hover { color: var(--accent-2); }
.footer .about-col p { font-size: 0.9rem; margin: 14px 0 20px; max-width: 30em; }
.footer .social { display: flex; gap: 10px; }
.footer .social a {
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--border); display: grid; place-items: center;
}
.footer .social a:hover { border-color: var(--accent); }
.footer .social svg { width: 17px; height: 17px; stroke: var(--text-muted); }
.footer .social a:hover svg { stroke: var(--accent-2); }
.footer-bottom { border-top: 1px solid var(--border-soft); margin-top: 44px; padding-top: 26px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; color: var(--text-dim); font-size: 0.84rem; }

/* ---------- three.js hero visuals ---------- */
.hero3d {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  /* CSS poster — visible until/unless WebGL takes over, and on failure */
  background:
    radial-gradient(55% 55% at 72% 26%, rgba(139, 92, 246, 0.16), transparent 72%),
    radial-gradient(40% 40% at 25% 80%, rgba(34, 211, 238, 0.08), transparent 70%);
}
.hero3d canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  animation: heroCanvasIn 1.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes heroCanvasIn {
  from { opacity: 0; transform: scale(1.05); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .hero3d canvas { animation: none; }
}
.hero3d::before {
  /* readability scrim: keeps left-aligned hero copy crisp over additive particles */
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(7, 7, 13, 0.28), rgba(7, 7, 13, 0) 34%);
}
.hero > * { position: relative; z-index: 1; }
/* Absolute full-hero layer behind content. `.hero > *` above also matches
   .hero3d at equal specificity but later in source, forcing position:relative
   and collapsing it to 0 height — this higher-specificity rule restores it. */
.hero > .hero3d { position: absolute; inset: 0; z-index: 0; }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }
main:focus { outline: none; }

/* ---------- FAQ accordion ---------- */
.faq { max-width: 46em; }
.faq details {
  border-bottom: 1px solid var(--border-soft);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 24px 18px 0;
  font-weight: 650;
  font-size: 1.05rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  width: 10px; height: 10px;
  border-right: 2px solid var(--accent-2);
  border-bottom: 2px solid var(--accent-2);
  transform: rotate(45deg);
  transition: transform 0.2s;
  flex: none;
}
.faq details[open] summary::after { transform: rotate(-135deg); }
.faq details p { padding: 0 0 22px; max-width: 42em; }

/* ---------- newsletter ---------- */
.newsletter {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 30px 0 40px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 44px;
  flex-wrap: wrap;
}
.newsletter h3 { margin-bottom: 6px; }
.newsletter p { max-width: 34em; }
.newsletter .f--news { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.newsletter .f--news input {
  width: 280px; padding: 13px 16px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: 0.95rem; outline: none;
}
.newsletter .f--news input:focus { border-color: var(--accent); }

/* ---------- related links ---------- */
.related { display: flex; gap: 10px; flex-wrap: wrap; margin: 6px 0 0; }
.related a {
  font-family: var(--mono); font-size: 0.8rem;
  padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-muted);
}
.related a:hover { border-color: var(--accent); color: var(--accent-2); }

/* ---------- table scroll (mobile) ---------- */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
@media (max-width: 760px) {
  .table-scroll table { min-width: 520px; }
}

/* ---------- how-it-works steps ---------- */
.card.step { position: relative; padding-top: 66px; }
.step-num {
  position: absolute;
  top: 26px; left: 28px;
  width: 30px; height: 30px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 0.8rem; font-weight: 700;
  color: #fff;
  background: var(--grad);
}

/* ---------- accelerator compare chips ---------- */
.compare-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 4px 0 22px; }
.compare-nav-label { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-dim); margin-right: 4px; }
.compare-nav a {
  font-family: var(--mono); font-size: 0.8rem;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-muted);
  transition: border-color 0.15s, color 0.15s;
}
.compare-nav a:hover { border-color: var(--accent); color: var(--accent-2); }
.compare-nav a.on { border-color: var(--accent); background: rgba(139,92,246,0.14); color: var(--accent-2); }

/* ---------- key-spec highlight cards ---------- */
.spec-hl {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 24px;
}
.spec-hl span { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.09em; color: var(--text-dim); display: block; margin-bottom: 8px; }
.spec-hl b { font-size: clamp(1.3rem, 2.2vw, 1.6rem); letter-spacing: -0.02em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .nav-links, .nav-cta .btn { display: none; }
  .nav-burger { display: block; margin-left: auto; }
  .nav-cta { margin-left: 0; }
  .grid-hero, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .compare { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 70px 0 60px; }
  .cta-box { padding: 44px 26px; }
  .glossary-term { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 560px) {
  .compare, .stats, .f-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}