/* SecVF site — palette derived from the README banner.
   #0f0c29 → #302b63 → #24243e gradient, #a78bfa accent. */

:root {
  --bg-0: #0a0816;
  --bg-1: #0f0c29;
  --bg-2: #1a1640;
  --bg-3: #302b63;
  --bg-4: #24243e;
  --ink: #e9e6ff;
  --ink-mute: #b6b1d8;
  --ink-dim: #8a85b3;
  --line: rgba(167,139,250,0.16);
  --line-strong: rgba(167,139,250,0.34);
  --accent: #a78bfa;
  --accent-2: #6366f1;
  --accent-3: #c4b5fd;
  --good: #22c55e;
  --warn: #eab308;
  --danger: #ef4444;
  --shadow: 0 30px 60px -20px rgba(0,0,0,.55), 0 12px 30px -8px rgba(99,102,241,.18);
  --radius: 14px;
  --radius-lg: 22px;
  --max: 1180px;
  --pad: clamp(20px, 4vw, 40px);
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: radial-gradient(ellipse 80% 50% at 50% -10%, #1c1845 0%, transparent 60%),
              linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 60%, #07061a 100%);
  background-attachment: fixed;
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection { background: rgba(167,139,250,.35); color: #fff; }

a { color: var(--accent-3); text-decoration: none; transition: color .15s; }
a:hover { color: #fff; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #0a0816;
  padding: 10px 16px; border-radius: 0 0 8px 0;
  font-weight: 600;
}
.skip:focus { left: 0; z-index: 1000; }

.wrap { max-width: var(--max); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

/* ─── nav ─────────────────────────────────────────────────────── */

.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(10, 8, 22, 0.72);
  border-bottom: 1px solid var(--line);
}
.nav-row {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; letter-spacing: .01em; }
.brand:hover { color: #fff; }
.brand-glyph { display: inline-flex; align-items: center; justify-content: center; }
.brand-name { font-size: 17px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 12px; border-radius: 8px; font-size: 14px; color: var(--ink-mute);
}
.nav-links a:hover { color: #fff; background: rgba(167,139,250,.08); }
.nav-links .ext { color: var(--accent-3); }

@media (max-width: 720px) {
  .nav-links a:not(.ext) { display: none; }
}

/* ─── hero ────────────────────────────────────────────────────── */

.hero { position: relative; padding: clamp(80px, 14vh, 160px) 0 clamp(60px, 10vh, 120px); overflow: hidden; isolation: isolate; }
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hero-gradient {
  position: absolute; inset: -10% -5%;
  background:
    radial-gradient(ellipse 60% 40% at 20% 30%, rgba(167,139,250,.28), transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 20%, rgba(99,102,241,.30), transparent 60%),
    radial-gradient(ellipse 60% 50% at 50% 80%, rgba(48,43,99,.55), transparent 70%),
    linear-gradient(135deg, var(--bg-1), var(--bg-3) 50%, var(--bg-4));
  filter: blur(40px);
  animation: drift 24s ease-in-out infinite alternate;
}
@keyframes drift {
  0%   { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(-2%,1%,0) scale(1.05); }
}
.hero-stars {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,.7) 50%, transparent 51%),
    radial-gradient(1px 1px at 78% 22%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 30% 60%, rgba(255,255,255,.6) 50%, transparent 51%),
    radial-gradient(1px 1px at 65% 75%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 50%, rgba(255,255,255,.45) 50%, transparent 51%),
    radial-gradient(1px 1px at 18% 80%, rgba(255,255,255,.5) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 50% 35%, rgba(255,255,255,.55) 50%, transparent 51%);
  opacity: .65;
  animation: twinkle 6s ease-in-out infinite alternate;
}
@keyframes twinkle { 0% { opacity: .35; } 100% { opacity: .8; } }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(167,139,250,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(167,139,250,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 80%);
  opacity: .9;
}

.hero-content { position: relative; }
.eyebrow {
  display: inline-block;
  font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent-3);
  padding: 6px 12px; border: 1px solid var(--line-strong); border-radius: 999px;
  background: rgba(167,139,250,.06);
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(40px, 6.6vw, 80px);
  line-height: 1.04; letter-spacing: -.025em; font-weight: 800;
  margin: 0 0 22px;
  text-wrap: balance;
}
.grad {
  background: linear-gradient(90deg, var(--accent-3), var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede {
  font-size: clamp(17px, 1.4vw, 20px); color: var(--ink-mute);
  max-width: 64ch; margin: 0 0 36px;
  text-wrap: pretty;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }
.btn {
  display: inline-flex; flex-direction: column; align-items: flex-start;
  gap: 2px; padding: 14px 22px; border-radius: 12px;
  font-weight: 600; font-size: 15px; line-height: 1.2;
  border: 1px solid transparent; cursor: pointer; user-select: none;
  transition: transform .12s, box-shadow .15s, background .15s, border-color .15s;
}
.btn-sub { font-size: 12px; font-weight: 500; opacity: .8; letter-spacing: .02em; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0a0816;
  box-shadow: 0 12px 28px -10px rgba(167,139,250,.6), inset 0 1px 0 rgba(255,255,255,.25);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 16px 36px -10px rgba(167,139,250,.7); }
.btn-ghost {
  background: rgba(255,255,255,.04);
  color: var(--ink); border-color: var(--line-strong);
}
.btn-ghost:hover { background: rgba(167,139,250,.10); border-color: var(--accent); transform: translateY(-1px); }
.btn-lg { padding: 16px 26px; font-size: 16px; }
.btn-disabled {
  background: rgba(255,255,255,.025);
  color: var(--ink-dim);
  border: 1px dashed var(--line-strong);
  cursor: not-allowed;
  user-select: none;
}
.btn-disabled:hover { transform: none; box-shadow: none; background: rgba(255,255,255,.025); }
.dl-card.dl-disabled { opacity: .88; }
.dl-card.dl-disabled .dl-badge { color: var(--warn); border-color: rgba(234,179,8,.45); background: rgba(234,179,8,.06); }

.hero-meta {
  display: grid; grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px 24px; margin: 30px 0 0; padding: 0; list-style: none;
  font-size: 14px; color: var(--ink-mute);
}
@media (min-width: 720px) { .hero-meta { grid-template-columns: repeat(4, minmax(0,1fr)); } }
.hero-meta li { display: flex; align-items: center; gap: 8px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }

/* ─── shared section bits ────────────────────────────────────── */

section { padding: clamp(70px, 10vh, 120px) 0; position: relative; }
.section-title {
  font-size: clamp(30px, 4vw, 46px);
  letter-spacing: -.02em; font-weight: 800; margin: 0 0 12px;
  text-wrap: balance;
}
.section-lede { color: var(--ink-mute); font-size: 17px; max-width: 60ch; margin: 0 0 48px; }

/* ─── features ─────────────────────────────────────────────── */

.features { border-top: 1px solid var(--line); }
.feature-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.feature {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(167,139,250,.04), rgba(167,139,250,.01));
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color .2s, transform .2s, background .2s;
}
.feature::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit;
  padding: 1px; background: linear-gradient(135deg, transparent, var(--accent) 60%, transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .25s;
  pointer-events: none;
}
.feature:hover { border-color: transparent; transform: translateY(-2px); }
.feature:hover::before { opacity: 1; }
.feature-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(167,139,250,.18), rgba(99,102,241,.12));
  color: var(--accent-3);
  margin-bottom: 18px;
  border: 1px solid var(--line-strong);
}
.feature h3 { margin: 0 0 10px; font-size: 19px; letter-spacing: -.01em; }
.feature p { margin: 0 0 14px; color: var(--ink-mute); }
.bullets { list-style: none; padding: 0; margin: 0; font-size: 14px; color: var(--ink-mute); }
.bullets li { padding-left: 18px; position: relative; margin-bottom: 6px; }
.bullets li::before {
  content: ""; position: absolute; left: 2px; top: 9px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); opacity: .9;
}

code, kbd {
  font-family: var(--mono); font-size: .9em;
  background: rgba(167,139,250,.10);
  border: 1px solid var(--line);
  padding: 1px 6px; border-radius: 5px;
  color: var(--accent-3);
}

/* ─── how it works diagram ────────────────────────────────── */

.how { border-top: 1px solid var(--line); }
.diagram {
  display: grid; gap: 14px;
  grid-template-columns: 1fr;
  padding: 28px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse at top right, rgba(99,102,241,.10), transparent 60%),
    rgba(255,255,255,.02);
  border: 1px solid var(--line);
  margin-bottom: 36px;
  font-family: var(--mono); font-size: 14px;
}
@media (min-width: 900px) {
  .diagram {
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    align-items: center;
  }
}
.d-col { display: grid; gap: 10px; }
.d-node {
  padding: 14px 16px; border-radius: 12px;
  background: rgba(167,139,250,.05);
  border: 1px solid var(--line-strong);
  text-align: center; line-height: 1.3;
}
.d-node small { display: block; color: var(--ink-dim); font-size: 11px; margin-top: 4px; letter-spacing: .04em; }
.d-node.hub {
  background: linear-gradient(135deg, rgba(167,139,250,.16), rgba(99,102,241,.08));
  border-color: var(--accent);
  color: #fff;
}
.d-node.tap { border-color: var(--warn); background: rgba(234,179,8,.06); }
.d-node.net { background: rgba(34,197,94,.06); border-color: rgba(34,197,94,.3); }
.d-arrows { display: none; }
.d-arrow-single {
  height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent);
  position: relative; min-width: 40px;
}
.d-arrow-single::after {
  content: "→"; position: absolute; right: -6px; top: 50%; transform: translateY(-50%);
  color: var(--accent); font-size: 18px; line-height: 1;
}
@media (max-width: 899px) {
  .d-arrow-single { width: 60%; margin: 0 auto; }
}
.d-tap { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.tap-line {
  display: block; width: 24px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.how-cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.how-card {
  padding: 24px; border-radius: var(--radius);
  background: rgba(255,255,255,.025); border: 1px solid var(--line);
}
.how-card h3 {
  margin: 0 0 8px; font-size: 17px; color: var(--accent-3);
  font-family: var(--mono); letter-spacing: .01em;
}
.how-card p { margin: 0; color: var(--ink-mute); font-size: 15px; }

/* ─── specs ───────────────────────────────────────────────── */

.specs { border-top: 1px solid var(--line); }
.specs-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.spec {
  padding: 28px 22px; border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(167,139,250,.04), transparent);
  border: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 6px;
}
.spec-num {
  font-size: 44px; font-weight: 800; letter-spacing: -.03em;
  background: linear-gradient(135deg, var(--accent-3), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1;
}
.spec-label { font-weight: 600; font-size: 15px; }
.spec-sub { font-size: 13px; color: var(--ink-dim); font-family: var(--mono); }

/* ─── downloads ────────────────────────────────────────────── */

.downloads { border-top: 1px solid var(--line); }
.dl-grid { display: grid; gap: 18px; grid-template-columns: 1fr; margin-bottom: 36px; }
@media (min-width: 800px) { .dl-grid { grid-template-columns: 1.15fr 1fr; align-items: stretch; } }
@media (min-width: 1080px) { .dl-grid.dl-grid-3 { grid-template-columns: 1.1fr 1fr 1fr; } }

.dl-card {
  position: relative; padding: 32px; border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.025);
  display: flex; flex-direction: column;
}
.dl-card.dl-primary {
  border-color: var(--line-strong);
  background:
    radial-gradient(ellipse at top right, rgba(167,139,250,.16), transparent 60%),
    linear-gradient(180deg, rgba(167,139,250,.08), rgba(99,102,241,.04));
  box-shadow: var(--shadow);
}
.dl-card header { margin-bottom: 22px; }
.dl-badge {
  display: inline-block; font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--accent); border-radius: 999px;
  padding: 4px 10px; margin-bottom: 14px; font-weight: 600;
  background: rgba(167,139,250,.10);
}
.dl-badge.subtle { color: var(--ink-mute); border-color: var(--line-strong); background: transparent; }
.dl-card h3 { margin: 0 0 4px; font-size: 26px; letter-spacing: -.02em; }
.dl-price { margin: 0; color: var(--ink-mute); font-family: var(--mono); font-size: 14px; }
.dl-card .bullets { margin-bottom: 24px; flex-grow: 1; }
.dl-card .btn { align-self: flex-start; }
.dl-foot { font-size: 12px; color: var(--ink-dim); margin: 16px 0 0; line-height: 1.5; }

.reqs {
  padding: 24px 28px; border-radius: var(--radius);
  background: rgba(255,255,255,.02); border: 1px solid var(--line);
}
.reqs h3 { margin: 0 0 16px; font-size: 16px; color: var(--accent-3); font-family: var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.reqs dl { display: grid; gap: 12px; margin: 0; grid-template-columns: 1fr; }
@media (min-width: 700px) { .reqs dl { grid-template-columns: repeat(2, 1fr); } }
.reqs dl > div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; align-items: baseline; }
.reqs dt { font-weight: 600; color: var(--ink-mute); font-size: 14px; }
.reqs dd { margin: 0; color: var(--ink); font-size: 14px; }

/* ─── trust band ───────────────────────────────────────────── */

.trust { border-top: 1px solid var(--line); background: linear-gradient(180deg, transparent, rgba(99,102,241,.04)); }
.trust-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.trust-card { padding: 26px; border-radius: var(--radius); background: rgba(255,255,255,.02); border: 1px solid var(--line); }
.trust-card h3 { margin: 0 0 8px; font-size: 17px; color: var(--accent-3); }
.trust-card p { margin: 0; color: var(--ink-mute); font-size: 15px; }

/* ─── final CTA band ───────────────────────────────────────── */

.cta-band {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(ellipse at center, rgba(167,139,250,.12), transparent 70%),
    linear-gradient(180deg, transparent, rgba(48,43,99,.25));
  text-align: center;
}
.cta-band h2 { font-size: clamp(28px, 4vw, 42px); margin: 0 0 12px; letter-spacing: -.02em; }
.cta-band p { color: var(--ink-mute); margin: 0 0 26px; }
.cta-band .cta-row { justify-content: center; }

/* ─── footer ─────────────────────────────────────────────── */

.footer {
  border-top: 1px solid var(--line);
  background: rgba(0,0,0,.25);
  padding: 60px 0 30px;
  font-size: 14px; color: var(--ink-mute);
}
.footer-grid {
  display: grid; gap: 32px; grid-template-columns: 1fr;
  margin-bottom: 36px;
}
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.footer h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .14em; color: var(--ink); margin: 0 0 14px; font-weight: 600; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; }
.footer-tag { margin: 12px 0 0; color: var(--ink-dim); font-size: 13px; max-width: 28ch; }
.footer-base {
  border-top: 1px solid var(--line); padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 12px; color: var(--ink-dim);
}

/* ─── 404 / wiki page support ─────────────────────────────── */

.page { padding: clamp(60px, 8vh, 100px) 0; }
.page h1 { font-size: clamp(34px, 5vw, 56px); letter-spacing: -.02em; margin: 0 0 14px; }
.page p { color: var(--ink-mute); }
.prose { max-width: 76ch; }
.prose h2 { margin-top: 2em; font-size: 24px; }
.prose h3 { margin-top: 1.6em; font-size: 19px; color: var(--accent-3); }
.prose p { margin: .8em 0; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose pre {
  background: rgba(0,0,0,.4);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono); font-size: 13px;
  line-height: 1.6;
}
.prose pre code { background: transparent; border: none; padding: 0; color: var(--ink); }
.prose blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(167,139,250,.05);
  padding: 12px 18px;
  margin: 1.4em 0;
  border-radius: 0 8px 8px 0;
  color: var(--ink-mute);
}
.prose table {
  width: 100%; border-collapse: collapse; margin: 1.2em 0;
  font-size: 14px;
}
.prose th, .prose td {
  text-align: left; padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}
.prose th { color: var(--accent-3); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }

/* ─── reveal-on-scroll ────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ─── wiki nav (sidebar) ──────────────────────────────────── */
.wiki-shell { display: grid; grid-template-columns: 1fr; gap: 32px; padding: clamp(40px, 6vh, 70px) 0 80px; }
@media (min-width: 980px) { .wiki-shell { grid-template-columns: 240px 1fr; gap: 48px; } }
.wiki-side { position: relative; }
@media (min-width: 980px) { .wiki-side { position: sticky; top: 88px; align-self: start; max-height: calc(100vh - 100px); overflow-y: auto; padding-right: 8px; } }
.wiki-side h4 { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); margin: 18px 0 8px; font-weight: 600; }
.wiki-side ul { list-style: none; padding: 0; margin: 0 0 14px; }
.wiki-side li { margin: 0; }
.wiki-side a { display: block; padding: 6px 10px; border-radius: 6px; color: var(--ink-mute); font-size: 14px; }
.wiki-side a:hover { background: rgba(167,139,250,.08); color: #fff; }
.wiki-side a.current { color: var(--accent-3); background: rgba(167,139,250,.10); border-left: 2px solid var(--accent); padding-left: 8px; }
.wiki-content article { max-width: 76ch; }
.wiki-content header.page-head { margin-bottom: 28px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.wiki-content header.page-head .crumb { font-family: var(--mono); font-size: 12px; color: var(--ink-dim); letter-spacing: .04em; margin-bottom: 8px; }
.wiki-content header.page-head h1 { margin: 0 0 8px; }
.wiki-content header.page-head .lede { color: var(--ink-mute); font-size: 17px; margin: 0; }

.callout { border-radius: var(--radius); padding: 14px 18px; margin: 1.4em 0; border: 1px solid var(--line-strong); background: rgba(167,139,250,.06); }
.callout.warn { border-color: rgba(234,179,8,.5); background: rgba(234,179,8,.07); }
.callout.danger { border-color: rgba(239,68,68,.5); background: rgba(239,68,68,.07); }
.callout.tip { border-color: rgba(34,197,94,.4); background: rgba(34,197,94,.06); }
.callout strong { color: var(--ink); }

.toc { font-size: 13px; color: var(--ink-mute); border-left: 2px solid var(--line); padding: 4px 0 4px 14px; margin: 0 0 28px; }
.toc h4 { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-dim); margin: 0 0 8px; }
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 4px 0; }

.kbds { display: inline-flex; gap: 4px; align-items: center; }
.kbds kbd { background: rgba(0,0,0,.4); border-color: var(--line-strong); padding: 2px 8px; font-size: 12px; }

.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; letter-spacing: .04em; font-weight: 600; border: 1px solid var(--line-strong); }
.badge.tip { color: var(--good); border-color: rgba(34,197,94,.4); background: rgba(34,197,94,.08); }
.badge.warn { color: #fde68a; border-color: rgba(234,179,8,.5); background: rgba(234,179,8,.08); }
.badge.danger { color: #fca5a5; border-color: rgba(239,68,68,.5); background: rgba(239,68,68,.08); }

/* ─── stack section (under the hood) ──────────────────────── */
.stack { border-top: 1px solid var(--line); }
.stack-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.stack-card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(167,139,250,.04), rgba(167,139,250,.01));
  border: 1px solid var(--line);
}
.stack-card pre { margin-top: 14px; }
.stack-tag {
  display: inline-block;
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); padding: 4px 10px; border-radius: 999px;
  background: rgba(167,139,250,.10); border: 1px solid var(--line-strong);
  margin-bottom: 14px;
}
.stack-card h3 { margin: 0 0 12px; font-size: 19px; letter-spacing: -.01em; }
.stack-card p { margin: 0 0 14px; color: var(--ink-mute); font-size: 15px; }
.stack-card pre {
  background: rgba(0,0,0,.4);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px; font-family: var(--mono); font-size: 12.5px; line-height: 1.55;
  overflow-x: auto; margin: 12px 0 14px; color: var(--ink);
}
.stack-card pre code { background: transparent; border: 0; padding: 0; color: inherit; }

/* ─── different section (vs others) ───────────────────────── */
.different { border-top: 1px solid var(--line); background: linear-gradient(180deg, transparent, rgba(99,102,241,.03)); }

/* ─── network section ─────────────────────────────────────── */
.network { border-top: 1px solid var(--line); }

/* ─── numbers section ─────────────────────────────────────── */
.numbers { border-top: 1px solid var(--line); }

/* ─── threat model section ────────────────────────────────── */
.threat { border-top: 1px solid var(--line); }
.threat-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.threat-card {
  padding: 28px; border-radius: var(--radius-lg);
  background: rgba(255,255,255,.02);
  border: 1px solid var(--line);
}
.threat-card.good { border-left: 3px solid rgba(34,197,94,.6); }
.threat-card.warn { border-left: 3px solid rgba(234,179,8,.6); }
.threat-card h3 { margin: 0 0 14px; font-size: 18px; }
.threat-card.good h3 { color: #86efac; }
.threat-card.warn h3 { color: #fde68a; }

.next-prev { display: grid; gap: 14px; grid-template-columns: 1fr; margin-top: 60px; padding-top: 28px; border-top: 1px solid var(--line); }
@media (min-width: 700px) { .next-prev { grid-template-columns: 1fr 1fr; } }
.np-card { padding: 18px 20px; border-radius: var(--radius); border: 1px solid var(--line); background: rgba(255,255,255,.02); display: block; }
.np-card:hover { background: rgba(167,139,250,.06); border-color: var(--line-strong); color: #fff; }
.np-card .np-label { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); display: block; margin-bottom: 4px; }
.np-card.next { text-align: right; }