/* cubby.network — editorial-technical site styles
 * Aesthetic: instrument panel meets editorial magazine.
 * Off-black canvas, cyan signal, generous vertical rhythm, hairline 1px rules.
 */

@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700&family=Geist+Mono:wght@400;500&family=Instrument+Serif:ital@0;1&display=swap');

:root {
  /* canvas */
  --bg:        #08090b;
  --bg-2:      #0c0e11;
  --panel:     #0f1217;
  --panel-2:   #14181f;
  --hairline:  #1a1f27;
  --rule:      #232932;

  /* ink */
  --ink:       #ecedee;
  --ink-2:     #b9bcc1;
  --ink-3:     #777b83;
  --ink-4:     #4a4e57;

  /* signal */
  --cyan:      oklch(84% 0.12 200);
  --cyan-2:    oklch(72% 0.14 200);
  --cyan-d:    oklch(56% 0.14 200);
  --amber:     oklch(82% 0.14 75);
  --rose:      oklch(74% 0.16 22);

  --serif: "Instrument Serif", "Times New Roman", serif;
  --sans:  "Geist", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono:  "Geist Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;

  --max:   1200px;
  --read:  720px;

  --ease:  cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  font-feature-settings: "ss01", "cv11";
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  background-image:
    radial-gradient(1200px 600px at 70% -10%, rgba(64, 220, 220, 0.05), transparent 60%),
    radial-gradient(900px 500px at 0% 30%, rgba(64, 220, 220, 0.025), transparent 70%);
}

/* Subtle grain — barely-there filmic noise */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.6'/></svg>");
}

::selection { background: var(--cyan); color: var(--bg); }

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

/* ---------- Top ticker ---------- */

.ticker {
  border-bottom: 1px solid var(--hairline);
  background: var(--bg-2);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.ticker-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.5rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  overflow: hidden;
  white-space: nowrap;
}
.ticker-cell { display: inline-flex; align-items: center; gap: 0.5rem; }
.ticker-cell .k { color: var(--ink-4); }
.ticker-cell .v { color: var(--ink-2); }
.ticker .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 currentColor;
  animation: pulse 2.4s var(--ease) infinite;
  color: var(--cyan);
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0   rgba(94, 234, 212, 0.5); }
  70%  { box-shadow: 0 0 0 8px rgba(94, 234, 212, 0); }
  100% { box-shadow: 0 0 0 0   rgba(94, 234, 212, 0); }
}

/* ---------- Nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--hairline);
  background: rgba(8, 9, 11, 0.78);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  font-size: 15px;
}
.brand-mark {
  width: 22px; height: 22px;
  color: var(--cyan);
  flex-shrink: 0;
}
.brand-name { color: var(--ink); }
.brand-name .sep {
  color: var(--ink-4);
  margin: 0 0.4rem;
  font-weight: 300;
}
.brand-name .tld {
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  font-size: 14px;
}
.nav-links a {
  color: var(--ink-2);
  transition: color .2s var(--ease);
  position: relative;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.is-active { color: var(--ink); }
.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -22px;
  height: 1px;
  background: var(--cyan);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink-2);
  font-size: 13px;
  transition: all .2s var(--ease);
}
.nav-cta:hover {
  border-color: var(--cyan-d);
  color: var(--ink);
  background: rgba(94,234,212,0.04);
}

/* ---------- Layout primitives ---------- */

main { position: relative; z-index: 2; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 6rem 0; position: relative; }
section + section { border-top: 1px solid var(--hairline); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-2);
  margin: 0 0 1.25rem;
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px;
  background: var(--cyan-d);
}

.section-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
  text-transform: uppercase;
}

h1, h2, h3, h4 {
  font-family: var(--sans);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--ink);
  margin: 0;
}

h2.title {
  font-size: clamp(2rem, 4.2vw, 3rem);
  letter-spacing: -0.025em;
  font-weight: 500;
  margin: 0 0 1.25rem;
  max-width: 900px;
}
h2.title em {
  font-style: normal;
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  color: var(--cyan-2);
  letter-spacing: -0.01em;
}

.lead {
  color: var(--ink-2);
  font-size: 17px;
  line-height: 1.55;
  max-width: var(--read);
  margin: 0 0 3rem;
  letter-spacing: -0.005em;
}

/* ---------- Hero ---------- */

.hero {
  padding: 5rem 0 6rem;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 4rem;
  align-items: end;
}
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin: 0 0 2rem;
}
.hero-meta .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(94,234,212,.5);
}
.hero-meta .sep { color: var(--ink-4); }

h1.hero-title {
  font-size: clamp(2.6rem, 6.4vw, 5.2rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 0 0 2rem;
  max-width: 1000px;
}
h1.hero-title .em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--cyan-2);
}
h1.hero-title .muted { color: var(--ink-3); }

.hero-lead {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 580px;
  margin: 0 0 2.25rem;
  letter-spacing: -0.005em;
}

.cta-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.78rem 1.15rem;
  border-radius: 7px;
  font-weight: 500;
  font-size: 14px;
  border: 1px solid transparent;
  transition: all .2s var(--ease);
  font-family: var(--sans);
  letter-spacing: -0.005em;
  cursor: pointer;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn-primary:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn-ghost:hover {
  border-color: var(--ink-3);
  background: rgba(255,255,255,0.02);
}
.btn .arrow { transition: transform .2s var(--ease); }
.btn:hover .arrow { transform: translateX(2px); }

/* Hero side panel: live status card */
.hero-side {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: linear-gradient(180deg, var(--bg-2), transparent);
  padding: 1.1rem 1.25rem;
}
.hero-side .row {
  display: flex;
  justify-content: space-between;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--hairline);
}
.hero-side .row:last-child { border-bottom: none; }
.hero-side .k { color: var(--ink-4); letter-spacing: 0.05em; text-transform: uppercase; font-size: 10.5px; }
.hero-side .v { color: var(--ink); }
.hero-side .v.ok { color: var(--cyan); }
.hero-side .v.warn { color: var(--amber); }
.hero-side .head {
  display: flex;
  justify-content: space-between;
  margin: 0 0 0.6rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink-2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 10.5px;
}

/* Hero topology — animated SVG */
.hero-topology {
  margin-top: 4rem;
  padding: 2rem 0 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 860px) {
  .hero-topology { grid-template-columns: 1fr; gap: 1.5rem; }
}
.topology-art { width: 100%; max-width: 540px; }
.topology-caption .label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--cyan-2);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.topology-caption .body {
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.6;
  max-width: 460px;
}

/* ---------- Marquee strip (vendors) ---------- */

.marquee {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: var(--bg-2);
  overflow: hidden;
  padding: 1.4rem 0;
}
.marquee-row {
  display: flex;
  gap: 4rem;
  align-items: center;
  white-space: nowrap;
  animation: scroll 50s linear infinite;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.05em;
}
.marquee-row span { display: inline-flex; align-items: center; gap: 0.6rem; }
.marquee-row .tag {
  font-size: 10px;
  color: var(--ink-4);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
@keyframes scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ---------- Section header ---------- */

.section-head {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  margin-bottom: 4rem;
  align-items: start;
}
@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; gap: 0.5rem; }
}
.section-head .num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-4);
  letter-spacing: 0.1em;
  padding-top: 0.7rem;
  border-top: 1px solid var(--rule);
}

/* ---------- Install ---------- */

.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  overflow: hidden;
}
.install-card {
  background: var(--bg-2);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: background .2s var(--ease);
}
.install-card:hover { background: var(--panel); }

.install-card .tier {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-2);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.install-card .tier::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
}
.install-card h3 {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin: 0;
}
.install-card .desc {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.55;
  margin: 0;
  flex: 1;
}
.install-card .foot {
  color: var(--ink-3);
  font-size: 12.5px;
  line-height: 1.5;
  margin: 0;
}
.install-card .foot a { color: var(--ink-2); border-bottom: 1px solid var(--rule); }
.install-card .foot a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- Code block ---------- */

pre.code {
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-2);
  overflow-x: auto;
  margin: 0;
  position: relative;
}
pre.code::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-d) 30%, var(--cyan-d) 70%, transparent);
  opacity: 0.4;
}
pre.code .c { color: var(--ink-4); }      /* comment */
pre.code .p { color: var(--cyan); user-select: none; }  /* prompt */
pre.code .ok { color: var(--cyan-2); }    /* checkmark line */
pre.code .s { color: var(--amber); }      /* string */

code.inline {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-2);
  border: 1px solid var(--hairline);
  padding: 0.06em 0.35em;
  border-radius: 4px;
  color: var(--ink);
}

.hero-code {
  margin-top: 2.5rem;
  max-width: 640px;
}

/* ---------- Why (failure modes) ---------- */

.failures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.failure {
  background: var(--bg);
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.failure .idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-4);
  letter-spacing: 0.05em;
}
.failure .idx .n { color: var(--rose); }
.failure h3 {
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--ink);
}
.failure p {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

.why-after {
  margin-top: 3.5rem;
  max-width: 720px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink);
  letter-spacing: -0.01em;
  border-left: 1px solid var(--cyan-d);
  padding-left: 1.5rem;
}
.why-after .accent { color: var(--cyan-2); }

/* ---------- What it is (features) ---------- */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  overflow: hidden;
}

.feature {
  background: var(--bg);
  padding: 1.75rem 1.5rem 1.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  position: relative;
  min-height: 220px;
  transition: background .2s var(--ease);
}
.feature:hover { background: var(--bg-2); }
.feature .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}
.feature h3 {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}
.feature p {
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0;
}

/* ---------- Flow / how it works ---------- */

.flow {
  position: relative;
  padding: 2.5rem 0;
}
.flow-rail {
  position: relative;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0;
}
.flow-rail::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: var(--rule);
}
.flow-rail::after {
  content: "";
  position: absolute;
  top: 28px;
  left: 6%;
  width: 0;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: flow-fill 6s ease-in-out infinite;
}
@keyframes flow-fill {
  0%, 10%   { width: 0; }
  85%, 100% { width: calc(88% - 0px); }
}
.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 0.4rem;
}
.flow-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--rule);
  margin-top: 22px;
  margin-bottom: 1rem;
  position: relative;
  z-index: 2;
  transition: all .25s var(--ease);
}
.flow-step:hover .flow-dot {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(94,234,212,0.12);
}
.flow-step .n {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}
.flow-step .name {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.2rem;
}
.flow-step .detail {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  line-height: 1.4;
}
@media (max-width: 860px) {
  .flow-rail { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .flow-rail::before, .flow-rail::after { display: none; }
  .flow-step { align-items: flex-start; text-align: left; }
  .flow-dot { margin-top: 4px; }
}

.flow-foot {
  margin-top: 3rem;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
  padding: 1rem 1.25rem;
  border: 1px dashed var(--rule);
  border-radius: 6px;
}
.flow-foot .k { color: var(--cyan-2); }

/* ---------- Invariants ---------- */

.invariants {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  overflow: hidden;
}
@media (max-width: 760px) { .invariants { grid-template-columns: 1fr; } }
.inv {
  padding: 1.6rem 1.75rem;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: var(--bg);
  position: relative;
}
.invariants .inv:nth-child(2n) { border-right: none; }
.invariants .inv:nth-last-child(-n+2) { border-bottom: none; }
@media (max-width: 760px) {
  .inv { border-right: none; }
  .invariants .inv:last-child { border-bottom: none; }
}
.inv .marker {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--cyan-2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.inv .marker::before {
  content: "✓";
  color: var(--cyan);
  font-size: 13px;
}
.inv h4 {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}
.inv p {
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0;
}

/* ---------- Stats ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, 1fr); } }

.stat {
  padding: 2.5rem 1.5rem;
  text-align: left;
  border-right: 1px solid var(--hairline);
  position: relative;
}
.stat:last-child { border-right: none; }
@media (max-width: 760px) {
  .stat:nth-child(2n) { border-right: none; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--hairline); }
}
.stat .v {
  font-family: var(--sans);
  font-size: 56px;
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}
.stat .v .plus {
  font-size: 28px;
  color: var(--cyan-2);
  font-weight: 400;
}
.stat .label {
  margin-top: 0.9rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- Doc cards ---------- */

.doc-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  overflow: hidden;
}

.doc-card {
  background: var(--bg-2);
  padding: 1.6rem 1.5rem 1.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: background .25s var(--ease);
  position: relative;
  min-height: 180px;
}
.doc-card:hover { background: var(--panel); }
.doc-card .meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 0.3rem;
}
.doc-card h3 {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}
.doc-card h3 .arr {
  color: var(--ink-3);
  transition: transform .2s var(--ease), color .2s var(--ease);
}
.doc-card:hover h3 .arr { transform: translateX(3px); color: var(--cyan); }
.doc-card p {
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.55;
  margin: 0;
  flex: 1;
}

/* ---------- CTA strip ---------- */

.cta-strip {
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  padding: 5rem 0;
  text-align: center;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
}
.cta-strip::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 200px at 50% 100%, rgba(94,234,212,0.08), transparent 70%);
  pointer-events: none;
}
.cta-strip h2 {
  font-size: clamp(2rem, 4.4vw, 3rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 1rem;
  position: relative;
}
.cta-strip h2 em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--cyan-2);
}
.cta-strip p {
  color: var(--ink-2);
  font-size: 16px;
  margin: 0 auto 2rem;
  max-width: 560px;
  position: relative;
}
.cta-strip .cta-row { justify-content: center; position: relative; }

/* ---------- Footer ---------- */

footer.site-footer {
  border-top: 1px solid var(--hairline);
  background: var(--bg);
  padding: 4rem 0 2rem;
  position: relative;
  z-index: 2;
}
.footer-grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.footer-brand .brand { font-size: 16px; }
.footer-brand p {
  color: var(--ink-3);
  font-size: 13.5px;
  line-height: 1.55;
  max-width: 320px;
  margin: 0;
}
.footer-col h5 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 1rem;
  font-weight: 500;
}
.footer-col a {
  display: block;
  color: var(--ink-3);
  font-size: 13.5px;
  padding: 0.3rem 0;
  transition: color .15s var(--ease);
}
.footer-col a:hover { color: var(--cyan); }

.footer-bottom {
  max-width: var(--max);
  margin: 3rem auto 0;
  padding: 1.4rem 1.5rem 0;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
}
.footer-bottom .pulse {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--cyan-2);
}
.footer-bottom .pulse::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  animation: pulse 2.4s var(--ease) infinite;
}

/* ---------- Prose (docs pages) ---------- */

.doc-shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  gap: 4rem;
}
@media (max-width: 920px) {
  .doc-shell { grid-template-columns: 1fr; gap: 1.5rem; }
}
.doc-aside {
  position: sticky;
  top: 90px;
  align-self: start;
  font-family: var(--mono);
  font-size: 12px;
  border-left: 1px solid var(--hairline);
  padding-left: 1rem;
  height: fit-content;
}
.doc-aside .label {
  color: var(--ink-4);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 10.5px;
  margin: 0 0 0.8rem;
}
.doc-aside a {
  display: block;
  color: var(--ink-3);
  padding: 0.3rem 0;
  transition: color .15s var(--ease);
}
.doc-aside a:hover, .doc-aside a.is-active { color: var(--cyan); }

.prose {
  max-width: var(--read);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-2);
}
.prose h1 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0 0 0.6rem;
}
.prose h2 {
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 3rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
}
.prose h2:first-of-type { border-top: none; padding-top: 0; margin-top: 1.5rem; }
.prose h3 {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 2rem 0 0.6rem;
}
.prose p { color: var(--ink-2); margin: 0 0 1.1rem; }
.prose a {
  color: var(--cyan-2);
  border-bottom: 1px solid var(--rule);
  transition: border-color .15s var(--ease);
}
.prose a:hover { border-color: var(--cyan); }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin-bottom: 0.45rem; }
.prose code:not(.inline) {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-2);
  border: 1px solid var(--hairline);
  padding: 0.06em 0.35em;
  border-radius: 4px;
}
.prose pre {
  background: var(--bg-2);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1rem 1.15rem;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 0 0 1.4rem;
}
.prose pre code { background: none; border: none; padding: 0; }
.prose blockquote {
  border-left: 1px solid var(--cyan-d);
  padding: 0.4rem 1.2rem;
  margin: 1.5rem 0;
  color: var(--ink-2);
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 14px;
}
.prose th, .prose td {
  border: 1px solid var(--hairline);
  padding: 0.55rem 0.85rem;
  text-align: left;
}
.prose th {
  background: var(--bg-2);
  font-weight: 500;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.prose hr { border: none; border-top: 1px solid var(--hairline); margin: 2.5rem 0; }
.prose-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
  padding-bottom: 1.2rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--hairline);
}

/* ---------- Page header for docs/changelog ---------- */

.page-head {
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--hairline);
}
.page-head .wrap { display: grid; grid-template-columns: 1fr 320px; gap: 3rem; align-items: end; }
@media (max-width: 860px) { .page-head .wrap { grid-template-columns: 1fr; gap: 1rem; } }
.page-head h1 {
  font-size: clamp(2.4rem, 5.4vw, 4rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1;
  margin: 0;
}
.page-head h1 em {
  font-family: var(--serif);
  font-style: italic;
  color: var(--cyan-2);
  font-weight: 400;
}
.page-head .lede {
  color: var(--ink-2);
  font-size: 16.5px;
  line-height: 1.55;
  max-width: 540px;
  margin: 1.25rem 0 0;
}
.page-head .meta-card {
  font-family: var(--mono);
  font-size: 12px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1rem 1.15rem;
  background: var(--bg-2);
}
.page-head .meta-card .row {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--hairline);
}
.page-head .meta-card .row:last-child { border-bottom: none; }
.page-head .meta-card .k { color: var(--ink-4); letter-spacing: 0.06em; text-transform: uppercase; font-size: 10.5px; }
.page-head .meta-card .v { color: var(--ink); }
.page-head .meta-card .v.ok { color: var(--cyan); }

/* ---------- Docs hub ---------- */

.docs-section { padding: 4rem 0; }
.docs-section + .docs-section { border-top: 1px solid var(--hairline); }
.docs-section .head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.docs-section h2 {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.docs-section .head-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-4);
}

/* ---------- Reveal-on-load ---------- */

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal 0.9s var(--ease) forwards;
}
.reveal-1 { animation-delay: 0.05s; }
.reveal-2 { animation-delay: 0.15s; }
.reveal-3 { animation-delay: 0.25s; }
.reveal-4 { animation-delay: 0.35s; }
.reveal-5 { animation-delay: 0.45s; }

@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Topology animation ---------- */

.topo-edge {
  stroke: var(--rule);
  stroke-width: 1;
  fill: none;
}
.topo-node {
  fill: var(--bg);
  stroke: var(--ink-3);
  stroke-width: 1;
}
.topo-node.signed {
  stroke: var(--cyan);
  fill: var(--bg);
}
.topo-label {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--ink-3);
  letter-spacing: 0.1em;
}
.topo-pulse {
  fill: var(--cyan);
  filter: drop-shadow(0 0 4px var(--cyan));
}
.topo-trail {
  stroke: var(--cyan);
  stroke-width: 1.5;
  fill: none;
  stroke-dasharray: 4 6;
  opacity: 0.6;
}

/* ---------- Mobile refinements ---------- */

@media (max-width: 640px) {
  .nav-links { gap: 1rem; font-size: 13px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-links a[href*="docs"], .nav-links a[href*="changelog"] { display: inline; }
  section { padding: 4rem 0; }
  .hero { padding: 3rem 0 4rem; }
  .ticker-cell:nth-child(n+3) { display: none; }
}