/* ==========================================================================
   VoiceSynth Studio — docs site
   Dark slate / warm amber / mono details
   ========================================================================== */

:root {
  --bg: #080b0f;
  --bg-elevated: #0c1117;
  --surface: #0f161e;
  --surface-2: #121b24;
  --surface-3: #17222d;
  --line: #22303c;
  --line-soft: #1a2631;
  --ink: #edf2f5;
  --ink-soft: #cfdae1;
  --muted: #8b9ba8;
  --muted-dim: #64737f;
  --accent: #ffb454;
  --accent-strong: #ff9a3c;
  --accent-soft: rgba(255, 180, 84, 0.12);
  --accent-line: rgba(255, 180, 84, 0.38);
  --ok: #7bdca4;
  --ok-soft: rgba(123, 220, 164, 0.12);
  --warn: #ffc46b;
  --warn-soft: rgba(255, 196, 107, 0.12);
  --danger: #ff8a7a;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.38);
  --font-sans: "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Code", "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --max: 1180px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(1100px 520px at 78% -12%, rgba(255, 154, 60, 0.10), transparent 62%),
    radial-gradient(800px 420px at 6% 4%, rgba(120, 160, 190, 0.06), transparent 64%),
    linear-gradient(180deg, #090d12 0%, var(--bg) 38%, #070a0e 100%);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

/* Subtle measurement grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.75), transparent 70%);
  z-index: 0;
}

main, .site-header, .site-footer, .signal-bar { position: relative; z-index: 1; }

img, svg { max-width: 100%; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-strong); }

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

h1, h2, h3, h4 {
  margin: 0 0 0.6rem;
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 650;
  color: var(--ink);
}

h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.65rem, 3.2vw, 2.45rem); }
h3 { font-size: 1.16rem; letter-spacing: -0.01em; }

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

code {
  font-size: 0.88em;
  color: var(--accent);
  background: rgba(255, 180, 84, 0.07);
  border: 1px solid rgba(255, 180, 84, 0.13);
  border-radius: 4px;
  padding: 0.08em 0.36em;
  overflow-wrap: anywhere;
}

pre {
  margin: 0;
  padding: 1.15rem 1.25rem;
  overflow-x: auto;
  color: #d7e2ea;
  font-size: 0.86rem;
  line-height: 1.7;
  tab-size: 2;
}

pre code {
  border: 0;
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

::selection { background: var(--accent); color: #171006; }

/* --------------------------------------------------------------------------
   Utility
   -------------------------------------------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.mono { font-family: var(--font-mono); }
.micro { font-size: 0.7rem; letter-spacing: 0.13em; text-transform: uppercase; }
.muted { color: var(--muted-dim); }
.fineprint { color: var(--muted); font-size: 0.84rem; line-height: 1.6; }
.accent { color: var(--accent); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 180, 84, 0.12);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(255, 180, 84, 0.10); opacity: 1; }
  50% { box-shadow: 0 0 0 7px rgba(255, 180, 84, 0.03); opacity: 0.75; }
}

.skip-link {
  position: absolute;
  left: 1rem; top: -60px;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: #171006;
  font-weight: 700;
  border-radius: 6px;
  z-index: 100;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; color: #171006; }

/* --------------------------------------------------------------------------
   Signal bar + header
   -------------------------------------------------------------------------- */

.signal-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.4rem clamp(1rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line-soft);
  color: var(--muted-dim);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: rgba(6, 9, 12, 0.7);
}

.signal-dots { display: inline-flex; gap: 4px; }
.signal-dots i {
  width: 14px; height: 5px;
  background: var(--line);
  border-radius: 1px;
  animation: meter 3.2s ease-in-out infinite;
}
.signal-dots i:nth-child(1) { animation-delay: 0s; background: var(--accent-line); }
.signal-dots i:nth-child(2) { animation-delay: 0.18s; }
.signal-dots i:nth-child(3) { animation-delay: 0.36s; background: var(--accent-line); }
.signal-dots i:nth-child(4) { animation-delay: 0.54s; }
.signal-dots i:nth-child(5) { animation-delay: 0.72s; }

@keyframes meter {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

.site-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(8, 11, 15, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 40;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  flex-shrink: 0;
}
.brand:hover { color: var(--ink); }

.brand-mark {
  display: inline-flex;
  width: 27px; height: 27px;
  color: var(--accent);
}
.brand-mark svg { fill: currentColor; width: 100%; height: 100%; }

.brand-text {
  font-weight: 680;
  letter-spacing: -0.02em;
  font-size: 1.02rem;
}
.brand-accent { color: var(--muted); font-weight: 500; }

.brand-version {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--muted-dim);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 0.1rem 0.45rem;
  margin-left: 0.15rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  margin-left: auto;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  padding: 0.3rem 0;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink-soft);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  background: var(--surface);
}
.header-cta svg { width: 14px; height: 14px; fill: currentColor; }
.header-cta:hover { border-color: var(--accent-line); color: var(--accent); }

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

.hero {
  position: relative;
  padding: clamp(3rem, 7vw, 6.5rem) clamp(1rem, 4vw, 2.5rem) clamp(2.5rem, 5vw, 4.5rem);
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 4%; right: -12%;
  width: 620px; height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 154, 60, 0.12), transparent 66%);
  filter: blur(20px);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.hero-copy h1 { margin-bottom: 1.35rem; }
.hero-copy h1 .accent { position: relative; white-space: nowrap; }

.lede {
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 1.5vw, 1.16rem);
  line-height: 1.7;
}

.hero-actions, .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.65rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.72rem 1.1rem;
  border-radius: 7px;
  border: 1px solid transparent;
  font-weight: 620;
  font-size: 0.92rem;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: #171006;
  box-shadow: 0 10px 30px rgba(255, 154, 60, 0.18);
}
.btn-primary:hover { background: #ffc06b; color: #171006; }

.btn-ghost {
  border-color: var(--line);
  color: var(--ink-soft);
  background: rgba(15, 22, 30, 0.5);
}
.btn-ghost:hover { border-color: var(--accent-line); color: var(--ink); }

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
}
.hero-facts strong { color: var(--ink); font-size: 1rem; margin-right: 0.2rem; }

/* Console */
.hero-console {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(23, 34, 45, 0.9), rgba(11, 16, 22, 0.96));
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-console::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
}

.console-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(8, 11, 15, 0.5);
}
.console-title { font-size: 0.68rem; color: var(--muted); letter-spacing: 0.06em; }
.console-leds { display: inline-flex; gap: 5px; }
.console-leds i { width: 7px; height: 7px; border-radius: 50%; background: var(--line); }
.console-leds i:nth-child(1) { background: #ff8a7a; }
.console-leds i:nth-child(2) { background: var(--warn); }
.console-leds i:nth-child(3) { background: var(--ok); }

.console-body { padding: 1.15rem 1.2rem 1rem; }

.terminal-line {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.9;
  color: #d3dfe7;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.terminal-line.indent { padding-left: 1.1rem; }
.terminal-line.muted { color: var(--muted-dim); }
.terminal-line.ok { color: var(--ok); }
.prompt { color: var(--accent); margin-right: 0.35rem; }

.console-wave {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 92px;
  margin: 1.2rem 0 0.9rem;
  padding: 0.5rem 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.console-wave i {
  flex: 1 1 0;
  min-width: 2px;
  height: var(--h);
  background: linear-gradient(180deg, var(--accent), rgba(255, 154, 60, 0.18));
  border-radius: 1px;
  opacity: 0.85;
  animation: wave 4.8s ease-in-out infinite alternate;
}
.console-wave i:nth-child(3n) { animation-delay: -1.1s; opacity: 0.55; }
.console-wave i:nth-child(4n) { animation-delay: -2.3s; opacity: 0.7; }

@keyframes wave {
  from { transform: scaleY(0.72); }
  to { transform: scaleY(1.06); }
}

.console-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.62rem;
  color: var(--muted-dim);
  letter-spacing: 0.1em;
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section {
  width: min(var(--max), calc(100% - clamp(2rem, 8vw, 5rem)));
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) 0;
}

.section-panel {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(17, 25, 34, 0.4), rgba(9, 13, 18, 0.3));
}

.section-head { max-width: 760px; margin-bottom: 2.2rem; }
.section-head h2 { margin-bottom: 0.7rem; }
.section-lede { color: var(--muted); font-size: 1rem; max-width: 65ch; }

.split-head {
  max-width: none;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
}
.split-head > div { max-width: 720px; }

.text-link {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid var(--accent-line);
  padding-bottom: 2px;
}

/* Chain */
.chain {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: 0.6rem;
}
.chain-node {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, var(--surface), rgba(12, 17, 23, 0.7));
  padding: 1.2rem 1.15rem;
}
.chain-node h3 { margin: 0.35rem 0 0.5rem; }
.chain-node p { color: var(--muted); font-size: 0.9rem; margin: 0; }
.step { color: var(--accent); font-size: 0.65rem; letter-spacing: 0.12em; }
.chain-arrow {
  display: flex; align-items: center; justify-content: center;
  color: var(--muted-dim); font-family: var(--font-mono); font-size: 1.1rem;
}

/* Cards */
.card-grid { display: grid; gap: 1rem; }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.backend-card, .feature-card, .backend-detail, .note-card, .fact-panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface-2), rgba(11, 16, 22, 0.8));
  padding: 1.35rem;
}
.backend-card::after, .feature-card::after, .backend-detail::after {
  content: "";
  position: absolute;
  top: 10px; right: 10px;
  width: 8px; height: 8px;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}
.tag {
  font-size: 0.66rem;
  color: var(--muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.backend-card h3 { margin-bottom: 0.6rem; }
.backend-card p { color: var(--muted); font-size: 0.9rem; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.16rem 0.5rem;
  border-radius: 20px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.status::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
}
.status-ok { color: var(--ok); background: var(--ok-soft); border-color: rgba(123, 220, 164, 0.2); }
.status-warn { color: var(--warn); background: var(--warn-soft); border-color: rgba(255, 196, 107, 0.2); }
.status-muted { color: var(--muted); background: rgba(139, 155, 168, 0.08); border-color: rgba(139, 155, 168, 0.16); }

.spec-list {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.42rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.78rem;
}
.spec-list span { color: var(--muted-dim); }
.spec-list b { color: var(--ink-soft); font-family: var(--font-mono); font-weight: 500; text-align: right; }

/* Matrix tables */
.matrix-wrap, .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); }

.matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background: rgba(10, 15, 20, 0.45);
}
.matrix th, .matrix td {
  padding: 0.72rem 0.9rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}
.matrix thead th {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-dim);
  background: rgba(8, 11, 15, 0.6);
  white-space: nowrap;
}
.matrix tbody tr:last-child th, .matrix tbody tr:last-child td { border-bottom: 0; }
.matrix tbody tr:hover { background: rgba(255, 180, 84, 0.03); }
.matrix tbody th { font-weight: 600; color: var(--ink-soft); }
.matrix td { color: var(--muted); }
.matrix td code { font-size: 0.78rem; }
.matrix.wide { min-width: 860px; }
.cli-table th:first-child { width: 20%; }
.cli-table td:nth-child(2) { width: 20%; }
.cli-table td:nth-child(3) { width: 13%; }
.row-sub {
  display: block;
  font-weight: 400;
  font-size: 0.72rem;
  color: var(--muted-dim);
  margin-top: 0.2rem;
  letter-spacing: 0.01em;
}

.matrix + .fineprint, .matrix-wrap + .fineprint { margin-top: 0.85rem; }

/* Feature cards */
.feature-icon {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--accent-line);
  border-radius: 9px;
  color: var(--accent);
  background: var(--accent-soft);
  margin-bottom: 1rem;
}
.feature-icon svg {
  width: 20px; height: 20px;
  fill: none; stroke: currentColor; stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round;
}
.feature-card p { color: var(--muted); font-size: 0.92rem; margin: 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 2.5rem;
  border-top: 1px solid var(--line-soft);
}
.feature-row {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.feature-row h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.feature-row p { color: var(--muted); font-size: 0.88rem; margin: 0; }
.idx { color: var(--accent); font-size: 0.72rem; padding-top: 0.18rem; }

/* CTA */
.cta-section { padding-top: 2rem; }
.cta-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: clamp(1.6rem, 4vw, 2.8rem);
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background:
    radial-gradient(600px 220px at 8% 0%, rgba(255, 180, 84, 0.12), transparent 65%),
    linear-gradient(160deg, var(--surface-2), #0a0e13);
  box-shadow: var(--shadow);
}
.cta-card h2 { margin-bottom: 0.5rem; }
.cta-card p { color: var(--muted); max-width: 54ch; }
.cta-actions { margin-top: 0; flex-shrink: 0; }

/* --------------------------------------------------------------------------
   Docs pages
   -------------------------------------------------------------------------- */

.page-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.8rem, 6vw, 5rem) clamp(1rem, 4vw, 2.5rem) clamp(1.4rem, 3vw, 2.2rem);
}
.page-hero h1 { max-width: 18ch; margin-bottom: 1rem; }
.page-hero .lede { max-width: 72ch; }

.doc-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  padding-top: 1.5rem;
}

.toc {
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
  padding-right: 1rem;
  border-right: 1px solid var(--line-soft);
}
.toc .micro { color: var(--muted-dim); margin-bottom: 0.45rem; }
.toc a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  padding: 0.18rem 0;
}
.toc a:hover { color: var(--accent); }

.doc-body { min-width: 0; }
.doc-section { margin-bottom: 3rem; scroll-margin-top: 100px; }
.doc-section h2 { margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--line-soft); }
.doc-section h3 { margin-top: 1.6rem; }
.doc-section p, .doc-section li { color: var(--ink-soft); }
.group-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 1.7rem 0 0.6rem;
}
.group-title:first-of-type { margin-top: 1rem; }

.code-block {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #0a0f14;
  margin: 1rem 0 1.3rem;
  overflow: hidden;
}
.code-head {
  display: flex;
  justify-content: space-between;
  padding: 0.45rem 0.9rem;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(23, 34, 45, 0.55);
  color: var(--muted-dim);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.callout {
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(255, 180, 84, 0.045);
  padding: 0.95rem 1.1rem;
  margin: 1.2rem 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.callout-warn {
  border-left-color: var(--warn);
  background: rgba(255, 196, 107, 0.05);
}
.callout strong { display: block; color: var(--ink); margin-bottom: 0.2rem; }
.wide-callout { max-width: 900px; margin-top: 0; }

.check-list { margin: 0; padding: 0; list-style: none; }
.check-list li {
  position: relative;
  padding: 0.55rem 0 0.55rem 1.4rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.92rem;
}
.check-list li::before {
  content: "▸";
  position: absolute; left: 0; top: 0.55rem;
  color: var(--accent);
  font-size: 0.8rem;
}
.check-list.compact li { font-size: 0.85rem; padding-top: 0.4rem; padding-bottom: 0.4rem; }

.steps-list { margin: 1rem 0 0; padding: 0; list-style: none; counter-reset: step; }
.steps-list li {
  display: flex; gap: 0.9rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 0.92rem;
}
.steps-list .mono { color: var(--accent); font-size: 0.7rem; padding-top: 0.25rem; }
.steps-list strong { color: var(--ink); }

.next-links {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-soft);
}
.next-links a {
  display: inline-flex;
  flex-direction: column;
  gap: 0.2rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
}
.next-links a:hover { color: var(--accent); }
.next-links .micro { color: var(--muted-dim); }

/* Backends page */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(15, 22, 30, 0.55);
  color: var(--muted);
  font-size: 0.8rem;
}
.legend > span { display: inline-flex; align-items: center; gap: 0.5rem; }

.backend-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.backend-detail { display: flex; flex-direction: column; }
.backend-detail h3 { margin-bottom: 0.2rem; }
.classname { color: var(--muted-dim); font-size: 0.66rem; margin-bottom: 1rem !important; }
.backend-detail p { color: var(--muted); font-size: 0.9rem; }
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin: 0.4rem 0 1rem;
  padding: 0.8rem;
  border: 1px solid var(--line-soft);
  border-radius: 7px;
  background: rgba(8, 11, 15, 0.35);
}
.spec-grid > div { display: flex; flex-direction: column; gap: 0.15rem; }
.spec-grid .micro { color: var(--muted-dim); font-size: 0.58rem; }
.spec-grid b { font-size: 0.8rem; font-family: var(--font-mono); font-weight: 500; color: var(--ink-soft); }
.backend-detail .check-list { margin-top: 0.6rem; }

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.two-col h2 { margin-bottom: 1rem; }

.note-card { padding: 1.2rem; }
.note-card .micro { color: var(--muted-dim); }
.code-inline {
  margin: 0.8rem 0;
  padding: 0.85rem;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: #0a0f14;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 2;
  color: var(--muted);
  overflow-x: auto;
}
.code-inline code { background: none; border: 0; padding: 0; color: var(--accent); }

/* Performance */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem;
  background: linear-gradient(165deg, var(--surface-2), rgba(11, 16, 22, 0.6));
}
.stat .micro { display: block; color: var(--muted-dim); font-size: 0.58rem; margin-bottom: 0.35rem; }
.stat b { display: block; font-size: 1.6rem; color: var(--accent); letter-spacing: -0.02em; }
.stat span { display: block; font-size: 0.72rem; color: var(--muted); margin-top: 0.15rem; }

.limits-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.limits-grid article {
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.1rem;
  background: rgba(15, 22, 30, 0.55);
}
.limits-grid h3 { font-size: 0.98rem; }
.limits-grid p { color: var(--muted); font-size: 0.86rem; margin: 0; }

/* FAQ */
.faq-section { max-width: 920px; }
.faq-list { margin: 0; }
.faq-list dt {
  color: var(--ink);
  font-weight: 620;
  font-size: 1.02rem;
  padding-top: 1.4rem;
}
.faq-list dd {
  margin: 0.5rem 0 0;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 0.93rem;
}
.faq-list.large dt { font-size: 1.08rem; }
.faq-list dd code { font-size: 0.82rem; }

/* About */
.fact-panel { padding: 1.3rem; }
.fact-panel .micro { color: var(--muted-dim); }
.fact-list { margin: 0.8rem 0 0; }
.fact-list > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.86rem;
}
.fact-list > div:last-child { border-bottom: 0; }
.fact-list dt { color: var(--muted-dim); }
.fact-list dd { margin: 0; color: var(--ink-soft); font-family: var(--font-mono); font-size: 0.8rem; }

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.security-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1.1rem;
  background: rgba(15, 22, 30, 0.5);
}
.security-grid h3 { font-size: 0.98rem; }
.security-grid p { color: var(--muted); font-size: 0.88rem; margin: 0; }

.link-list { list-style: none; margin: 0.8rem 0; padding: 0; }
.link-list li { padding: 0.4rem 0; border-bottom: 1px solid var(--line-soft); color: var(--muted); font-size: 0.84rem; }
.link-list li:last-child { border-bottom: 0; }

.ui-list { margin-top: 1.2rem; }
.ui-list article {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.ui-list h3 { font-size: 1rem; margin-bottom: 0.2rem; }
.ui-list p { color: var(--muted); font-size: 0.9rem; margin: 0; }
.ui-list .idx { padding-top: 0.15rem; }

/* 404 */
.notfound {
  min-height: calc(100vh - 260px);
  display: grid;
  place-items: center;
  padding: 4rem 1.25rem;
}
.notfound-inner { max-width: 680px; text-align: center; }
.notfound-inner h1 { font-size: clamp(2.2rem, 6vw, 3.6rem); }
.notfound-inner .lede { margin: 0 auto; }
.flatline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 90px;
  margin: 2rem 0 1rem;
  padding: 0 1rem;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.flatline i {
  flex: 0 1 8px;
  height: var(--h);
  min-height: 3px;
  background: var(--accent-line);
  border-radius: 1px;
}
.notfound-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; justify-content: center; margin: 1.6rem 0; }

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

.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 14, 19, 0.5), #06080b);
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1rem, 4vw, 2.5rem) 0;
  margin-top: 2rem;
}
.footer-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
}
.footer-brand p { color: var(--muted); font-size: 0.88rem; max-width: 34ch; margin-top: 0.8rem; }
.footer-logo { margin-bottom: 0.25rem; }
.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted-dim);
  font-weight: 500;
  margin-bottom: 0.8rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.42rem; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 0.84rem; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.9rem 0 1.4rem;
  border-top: 1px solid var(--line-soft);
  color: var(--muted-dim);
}
.footer-bottom .micro { color: var(--muted-dim); }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .site-nav { gap: 0.8rem; }
  .site-nav a { font-size: 0.78rem; }
  .backend-detail-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .backend-detail-grid .backend-detail:last-child { grid-column: 1 / -1; }
}

@media (max-width: 920px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-copy { order: 1; }
  .hero-console { order: 2; }
  .chain { grid-template-columns: 1fr 1fr; }
  .chain-arrow { display: none; }
  .card-grid.three, .limits-grid { grid-template-columns: 1fr 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .doc-layout { grid-template-columns: 1fr; }
  .toc {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    padding: 0 0 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .toc .micro { width: 100%; margin-bottom: 0; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 90px; }
  .signal-bar { font-size: 0.55rem; letter-spacing: 0.12em; }
  .signal-bar span:nth-child(2) { display: none; }

  .site-header {
    flex-wrap: wrap;
    gap: 0.5rem 0.9rem;
    padding: 0.7rem 1rem;
  }
  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    flex-wrap: wrap;
    row-gap: 0.15rem;
    column-gap: 0.85rem;
    padding-bottom: 0.2rem;
  }
  .site-nav a { font-size: 0.74rem; }
  .header-cta { margin-left: auto; }

  .hero { padding-top: 2.4rem; }
  .hero-copy h1 { font-size: clamp(2.2rem, 10vw, 3.2rem); }
  .hero-facts { gap: 1rem; }
  .console-wave { height: 70px; gap: 2px; }
  .terminal-line { font-size: 0.68rem; }

  .section { width: calc(100% - 2rem); padding: 2.6rem 0; }
  .page-hero { padding: 2.4rem 1rem 1rem; }
  .split-head { flex-direction: column; align-items: flex-start; gap: 0.8rem; }

  .chain { grid-template-columns: 1fr; }
  .card-grid.three, .limits-grid, .backend-detail-grid { grid-template-columns: 1fr; }
  .backend-detail-grid .backend-detail:last-child { grid-column: auto; }
  .two-col, .security-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; gap: 0.7rem; }
  .cta-card { flex-direction: column; align-items: flex-start; }
  .cta-actions { margin-top: 0.4rem; }

  .matrix th, .matrix td { padding: 0.62rem 0.7rem; font-size: 0.8rem; }
  .cli-table { min-width: 640px; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.3rem; }
  .next-links { flex-direction: column; }
}

@media (max-width: 420px) {
  .hero-facts { flex-direction: column; gap: 0.35rem; }
  .stat-row { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions .btn, .cta-actions .btn, .notfound-actions .btn { width: 100%; }
  .btn { padding: 0.7rem 0.9rem; }
  .brand-version { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}