/* =========================================================================
   OmniGoAI — premium editorial design system
   Self-hosted fonts · warm ivory palette · pine-green jewel accent
   ========================================================================= */

@font-face {
  font-family: 'Fraunces';
  src: url('/assets/fonts/fraunces-wght-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Fraunces';
  src: url('/assets/fonts/fraunces-wght-italic.woff2') format('woff2');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Hanken Grotesk';
  src: url('/assets/fonts/hankengrotesk-wght-normal.woff2') format('woff2');
  font-weight: 300 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #f7f4ec;
  --paper-2: #f1ece1;
  --surface: #fffdf8;
  --ink: #1a1813;
  --ink-2: #322e26;
  --muted: #6f685a;
  --faint: #918a7c;
  --line: rgba(26, 24, 19, 0.12);
  --line-2: rgba(26, 24, 19, 0.2);
  --accent: #1f6f5b;
  --accent-ink: #17564a;
  --accent-soft: #e6efe9;
  --shadow-sm: 0 1px 2px rgba(26, 24, 19, 0.05), 0 6px 18px rgba(26, 24, 19, 0.05);
  --shadow-lg: 0 30px 70px -30px rgba(26, 24, 19, 0.28), 0 8px 26px -16px rgba(26, 24, 19, 0.2);
  --font-display: 'Fraunces', 'Songti SC', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
  --font-sans: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Consolas, 'Liberation Mono', monospace;
  --maxw: 1180px;
  --radius: 14px;
  --radius-lg: 22px;
}

.accent-amber,
[data-accent='amber'] {
  --accent: #9a6b2f;
  --accent-ink: #7f561f;
  --accent-soft: #f1e8d8;
}

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

html {
  background: var(--paper);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-2);
  font-weight: 400;
  letter-spacing: -0.003em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 560;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
  font-optical-sizing: auto;
}

p { margin: 0; }

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

img { max-width: 100%; height: auto; display: block; }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  z-index: 1100;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
}
.skip-link:focus { left: 16px; }

/* ---- Layout primitives ---- */
.shell { width: min(var(--maxw), calc(100% - 48px)); margin-inline: auto; }
.narrow { width: min(720px, calc(100% - 48px)); margin-inline: auto; }
.narrow-wide { width: min(860px, calc(100% - 48px)); margin-inline: auto; }

.section { padding: clamp(64px, 9vw, 128px) 0; }
.section.pt-0 { padding-top: clamp(28px, 4vw, 48px); }
.band { background: var(--paper-2); border-block: 1px solid var(--line); }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 70px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.logo-mark { color: var(--ink); flex: none; }
.brand-name { line-height: 1; }

.nav-panel { display: flex; align-items: center; gap: 30px; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
  position: relative;
  padding: 4px 0;
  transition: color 0.18s ease;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 18px; }
.lang-switch {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 6px 13px;
  transition: border-color 0.18s ease, color 0.18s ease;
}
.lang-switch:hover { color: var(--ink); border-color: var(--ink); }

.nav-toggle { position: absolute; left: -9999px; opacity: 0; }
.nav-burger { display: none; }

/* ---- Nav dropdowns (product / download, split by product) ---- */
.nav-group { position: relative; display: inline-flex; align-items: center; }
.nav-group-top { display: inline-flex; align-items: center; gap: 5px; }
.nav-caret { opacity: 0.5; transition: transform 0.22s ease, opacity 0.2s ease; }
.nav-group:hover .nav-caret, .nav-group:focus-within .nav-caret { transform: rotate(180deg); opacity: 0.85; }
/* transparent bridge so the pointer can travel from the label into the panel */
.nav-group::after { content: ''; position: absolute; top: 100%; left: -20px; right: -20px; height: 16px; }
.nav-sub {
  position: absolute;
  top: 100%; left: 50%;
  margin-top: 14px;
  width: 300px;
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 24px 48px -16px rgba(23, 21, 15, 0.28), 0 6px 16px -10px rgba(23, 21, 15, 0.16);
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.2s ease, transform 0.24s cubic-bezier(0.2, 0.7, 0.2, 1), visibility 0.2s;
}
.nav-group:hover .nav-sub, .nav-group:focus-within .nav-sub {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translate(-50%, 0);
}
.nav-sub .nav-sub-item {
  display: flex; flex-direction: column; gap: 2px;
  padding: 11px 14px; border-radius: 12px;
}
.nav-sub .nav-sub-item::after { display: none; }
.nav-sub-name { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
.nav-sub-desc { font-size: 0.8rem; line-height: 1.4; color: var(--muted); }
.nav-sub .nav-sub-item:hover { background: var(--accent-soft); }
.nav-sub .nav-sub-item:hover .nav-sub-name { color: var(--accent-ink); }
.nav-sub .nav-sub-all {
  margin: 6px 6px 2px; padding: 12px 8px 4px;
  border-top: 1px solid var(--line);
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.85rem; font-weight: 600; color: var(--muted);
}
.nav-sub .nav-sub-all::after { display: none; }
.nav-sub-all span { transition: transform 0.2s ease; }
.nav-sub .nav-sub-all:hover { color: var(--accent-ink); }
.nav-sub .nav-sub-all:hover span { transform: translateX(3px); }

/* ---- Buttons ---- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 13px 24px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: transform 0.16s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); background: var(--accent-ink); border-color: var(--accent-ink); }
.button:active { transform: translateY(0); }
.button.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-2);
}
.button.ghost:hover { background: var(--surface); border-color: var(--ink); box-shadow: var(--shadow-sm); }
.button.button-sm { min-height: 40px; padding: 8px 17px; font-size: 0.92rem; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--ink);
  font-size: 0.98rem;
}
.text-link::after { content: '→'; color: var(--accent); transition: transform 0.18s ease; }
.text-link:hover::after { transform: translateX(4px); }
.text-link.muted { color: var(--muted); }
.text-link.muted::after { content: '↗'; }

/* ---- Eyebrow / shared type ---- */
.eyebrow {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin-bottom: 18px;
}
.lead {
  font-size: clamp(1.08rem, 1.6vw, 1.28rem);
  line-height: 1.55;
  color: var(--muted);
  max-width: 60ch;
}
.lead strong { color: var(--ink-2); font-weight: 600; }

/* ---- Hero ---- */
.hero { padding: clamp(48px, 7vw, 104px) 0 clamp(40px, 5vw, 72px); position: relative; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}
.hero-copy h1 {
  font-size: clamp(2.6rem, 6vw, 4.7rem);
  margin: 6px 0 24px;
  max-width: 16ch;
}
.hero-copy h1 em { font-style: italic; color: var(--accent-ink); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.announce {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 500;
}
.pulse {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 60%, transparent);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 55%, transparent); }
  70% { box-shadow: 0 0 0 12px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ---- Stat row ---- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat { padding: 28px 28px 28px 0; border-right: 1px solid var(--line); }
.stat:last-child { border-right: none; }
.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 540;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
}
.stat-label { display: block; margin-top: 10px; font-size: 0.92rem; color: var(--muted); }

/* ---- Product visuals (CSS mock) ---- */
.viz { margin: 0; perspective: 1400px; }
.viz-window {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: rotateY(-4deg) rotateX(1.5deg);
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.hero-visual:hover .viz-window { transform: rotateY(0deg) rotateX(0deg); }
.viz-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 18px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}
.viz-bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--line-2); }
.viz-bar i:first-child { background: #d98b6a; }
.viz-bar i:nth-child(2) { background: #d9be6a; }
.viz-bar i:nth-child(3) { background: #8bbd92; }
.viz-bar em {
  margin-left: 10px;
  font-style: normal;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  font-family: var(--font-mono);
}
.viz-body { display: grid; grid-template-columns: 1.15fr 1fr; gap: 18px; padding: 22px; }
.viz-compose {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.viz-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent-soft);
  padding: 4px 9px;
  border-radius: 6px;
  margin-bottom: 16px;
}
.viz-line { height: 9px; border-radius: 6px; background: var(--line-2); margin: 10px 0; opacity: 0.75; }
.viz-line.w90 { width: 90%; } .viz-line.w80 { width: 80%; }
.viz-line.w70 { width: 70%; } .viz-line.w50 { width: 50%; }
.viz-ifaces { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.viz-ifaces span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
}
.viz-targets { display: grid; gap: 9px; align-content: start; }
.viz-target {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 8px 11px;
}
.viz-target i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-2); flex: none; }
.viz-target.ok { color: var(--ink-2); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.viz-target.ok i { background: var(--accent); }

.viz-terminal .viz-term { padding: 22px; font-family: var(--font-mono); font-size: 0.84rem; }
.viz-term p { margin: 0 0 10px; color: var(--ink-2); }
.viz-prompt { color: var(--accent); font-weight: 700; margin-right: 8px; }
.viz-dim { color: var(--faint); }
.viz-routes { display: grid; gap: 9px; margin-top: 16px; }
.viz-route {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 13px;
  font-size: 0.8rem;
  color: var(--ink-2);
}
.viz-route b { color: var(--accent); }
.viz-route span:last-child { margin-left: auto; color: var(--muted); }

/* ---- Section heads ---- */
.section-head { max-width: 760px; margin-bottom: clamp(34px, 4vw, 56px); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .lead { margin-inline: auto; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); }
.section-head h2 em { font-style: italic; color: var(--accent-ink); }
.section-head .lead { margin-top: 18px; }
.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.section-head-row .section-head { margin-bottom: clamp(28px, 3vw, 40px); }

/* ---- Product cards ---- */
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}
.product-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.32s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--line-2); }
.product-card:hover::before { transform: scaleX(1); }
.product-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.product-card-cat { font-size: 0.82rem; color: var(--muted); font-weight: 500; }
.product-card-name { font-size: 2rem; margin-bottom: 6px; }
.product-card-tagline { font-size: 1.05rem; color: var(--accent-ink); font-weight: 500; margin-bottom: 14px; }
.product-card-summary { color: var(--muted); font-size: 0.98rem; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 26px; }
.meta-row span {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-2);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
}
.card-actions { display: flex; gap: 22px; margin-top: auto; padding-top: 8px; }

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 5px 12px;
}
.badge.subtle { color: var(--muted); background: var(--paper); border: 1px solid var(--line); }

/* ---- Workflow steps ---- */
.workflow-grid { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr); gap: clamp(36px, 5vw, 72px); align-items: start; }
.workflow-intro .section-head { margin-bottom: 0; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
}
.step h3 { font-size: 1.35rem; margin-bottom: 8px; }
.step p { color: var(--muted); }

/* ---- Why grid ---- */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.why-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.why-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.why-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.why-card h3 { font-size: 1.5rem; margin: 16px 0 12px; }
.why-card p { color: var(--muted); }

/* ---- Platform groups ---- */
.platform-groups { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.platform-group {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.platform-group h3 { font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 14px; border-bottom: 1px solid var(--line); letter-spacing: -0.01em; }
.platform-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.platform-tags span {
  font-size: 0.82rem;
  color: var(--ink-2);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 5px 10px;
}

/* ---- Posts ---- */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--line-2); }
.post-card-meta, .article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}
.post-card h3 { font-size: 1.42rem; line-height: 1.2; margin-bottom: 12px; }
.post-card h3 a { transition: color 0.18s ease; }
.post-card:hover h3 a { color: var(--accent-ink); }
.post-card p { color: var(--muted); font-size: 0.96rem; margin-bottom: 20px; }
.post-card .text-link { margin-top: auto; }
.dot { width: 3px; height: 3px; border-radius: 50%; background: var(--faint); }

.post-card.feature {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  align-items: center;
  gap: 40px;
  margin-bottom: 22px;
  padding: 44px;
  background: var(--ink);
  border-color: var(--ink);
}
.post-card.feature h3 { font-size: clamp(1.8rem, 3vw, 2.6rem); color: var(--paper); }
.post-card.feature p { color: color-mix(in srgb, var(--paper) 72%, transparent); font-size: 1.05rem; }
.post-card.feature .post-card-meta { color: color-mix(in srgb, var(--paper) 60%, transparent); }
.post-card.feature .text-link { color: var(--paper); }
.post-card.feature:hover { transform: none; }

/* ---- Doc cards / layout ---- */
.doc-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.doc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.doc-card h3 { font-size: 1.4rem; margin: 16px 0 12px; }
.doc-card p { color: var(--muted); font-size: 0.96rem; }

.doc-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr) 200px;
  gap: 48px;
  padding: clamp(48px, 6vw, 88px) 0;
  align-items: start;
}
.doc-sidebar, .doc-toc { position: sticky; top: 96px; align-self: start; }
.back-link { display: inline-block; font-size: 0.9rem; font-weight: 600; color: var(--muted); margin-bottom: 20px; transition: color 0.18s ease; }
.back-link:hover { color: var(--ink); }
.doc-nav { display: grid; gap: 4px; }
.doc-nav a {
  font-size: 0.94rem;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 9px;
  border-left: 2px solid transparent;
  transition: all 0.18s ease;
}
.doc-nav a:hover { color: var(--ink); background: var(--surface); }
.doc-nav a.current { color: var(--accent-ink); font-weight: 600; border-left-color: var(--accent); background: var(--accent-soft); }
.doc-toc .toc-title { display: block; font-size: 0.74rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin-bottom: 14px; }
.doc-toc nav { display: grid; gap: 8px; }
.doc-toc a { font-size: 0.88rem; color: var(--muted); transition: color 0.18s ease; }
.doc-toc a:hover { color: var(--accent-ink); }

/* ---- Prose ---- */
.prose { max-width: 100%; }
.prose > * + * { margin-top: 1.25em; }
.prose h1 { font-size: clamp(2rem, 4vw, 3rem); margin-top: 0; }
.prose h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); margin-top: 1.8em; }
.prose h3 { font-size: 1.32rem; margin-top: 1.5em; }
.prose p, .prose li { color: var(--ink-2); font-size: 1.06rem; line-height: 1.78; }
.prose a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.prose a:hover { text-decoration-color: var(--accent); }
.prose ul, .prose ol { padding-left: 1.3em; display: grid; gap: 0.5em; }
.prose li { padding-left: 0.2em; }
.prose li::marker { color: var(--accent); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.12em 0.4em;
}
.prose pre {
  background: #14130f;
  color: #e9e3d4;
  border-radius: var(--radius);
  padding: 20px 22px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
  border: 1px solid rgba(0,0,0,0.4);
}
.prose pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit; }
.prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 22px;
  margin-left: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink);
}
.prose blockquote p { color: var(--ink); }
.prose img { border-radius: var(--radius); border: 1px solid var(--line); margin-block: 1.6em; }
.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.4em 0; }

/* ---- Article ---- */
.article-head { padding: clamp(40px, 6vw, 80px) 0 28px; }
.article-head h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); margin: 18px 0; max-width: 18ch; }
.article-head .lead { font-size: 1.25rem; }
.article-meta a { color: var(--accent-ink); }
.prose.narrow, .article-head .narrow { width: min(720px, calc(100% - 48px)); }
.tag-row { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); background: var(--paper-2); border: 1px solid var(--line); border-radius: 7px; padding: 4px 10px; }

/* ---- Page hero / split / panels ---- */
.page-hero { padding: clamp(56px, 8vw, 110px) 0 clamp(20px, 3vw, 40px); }
.page-hero h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); margin: 8px 0 22px; max-width: 16ch; }
.page-hero .lead { font-size: clamp(1.1rem, 1.8vw, 1.35rem); }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr); gap: clamp(36px, 5vw, 72px); align-items: start; }
.split-lead .big-statement, .split-lead h2 { font-family: var(--font-display); font-size: clamp(1.7rem, 3vw, 2.6rem); line-height: 1.12; letter-spacing: -0.02em; color: var(--ink); }
.split-lead .eyebrow { margin-bottom: 14px; }
.info-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}
.info-panel dl { margin: 0; display: grid; gap: 20px; }
.info-panel dt { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-bottom: 5px; }
.info-panel dd { margin: 0; color: var(--ink-2); }
.info-panel dd a { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 2px; word-break: break-word; }
.info-panel p { color: var(--ink-2); }

.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.capability {
  display: grid;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.capability span { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; color: var(--accent); }
.capability p { color: var(--ink-2); font-size: 0.98rem; }

.pill-list { display: flex; flex-wrap: wrap; gap: 10px; align-content: start; }
.pill-list span {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
}

/* ---- Pricing ---- */
.tier-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.tier-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 38px;
  display: flex;
  flex-direction: column;
}
.tier-card.featured { border-color: var(--accent); box-shadow: var(--shadow-lg); }
.tier-flag {
  position: absolute;
  top: 22px; right: 22px;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent-ink); background: var(--accent-soft); border-radius: 999px; padding: 5px 12px;
}
.tier-card h2 { font-size: 1.7rem; margin-bottom: 12px; }
.tier-price { font-family: var(--font-display); font-size: 2.2rem; color: var(--ink); margin-bottom: 14px; letter-spacing: -0.02em; }
.tier-summary { color: var(--muted); margin-bottom: 24px; }
.tier-features { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 12px; }
.tier-features li { position: relative; padding-left: 28px; color: var(--ink-2); font-size: 0.98rem; }
.tier-features li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.tier-card .button { margin-top: auto; }
.fine-note { margin-top: 30px; color: var(--muted); font-size: 0.92rem; text-align: center; max-width: 70ch; margin-inline: auto; }

/* ---- Contact ---- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
.contact-cards { display: grid; gap: 16px; }
.contact-card {
  display: grid;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: var(--line-2); }
.contact-label { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }
.contact-value { font-family: var(--font-display); font-size: 1.4rem; color: var(--ink); word-break: break-word; }

/* ---- FAQ ---- */
.faq-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 24px 4px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-family: var(--font-sans); font-size: 1.5rem; color: var(--accent); transition: transform 0.2s ease; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-answer { padding: 0 4px 26px; max-width: 70ch; }
.faq-answer p { color: var(--muted); }

/* ---- Final CTA ---- */
.final-cta { padding: clamp(56px, 7vw, 100px) 0; }
.final-box {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: clamp(40px, 6vw, 76px);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.final-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 120% at 50% -20%, color-mix(in srgb, var(--accent) 40%, transparent), transparent 60%);
}
.final-box > * { position: relative; }
.final-box h2 { font-size: clamp(1.9rem, 4vw, 3.2rem); color: var(--paper); max-width: 18ch; margin-inline: auto; }
.final-box h2 em { font-style: italic; color: color-mix(in srgb, var(--accent) 60%, var(--paper)); }
.final-box p { color: color-mix(in srgb, var(--paper) 74%, transparent); max-width: 56ch; margin: 20px auto 0; font-size: 1.1rem; }
.final-box .actions { justify-content: center; }
.final-box .button { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.final-box .button:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.final-box .button.ghost { background: transparent; color: var(--paper); border-color: color-mix(in srgb, var(--paper) 40%, transparent); }
.final-box .button.ghost:hover { background: color-mix(in srgb, var(--paper) 12%, transparent); border-color: var(--paper); }

/* ---- Error page ---- */
.error-page { padding: clamp(80px, 14vw, 200px) 0; text-align: center; }
.error-code { font-family: var(--font-display); font-size: clamp(5rem, 18vw, 12rem); font-weight: 540; color: var(--accent); line-height: 1; letter-spacing: -0.04em; }
.error-page h1 { font-size: clamp(1.8rem, 4vw, 3rem); margin: 10px 0 18px; }
.error-page .lead { margin: 0 auto 32px; }
.error-page .button { margin-inline: auto; }

/* ---- Footer ---- */
.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding: clamp(56px, 7vw, 88px) 0 36px; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { color: var(--muted); font-size: 0.96rem; max-width: 38ch; }
.footer-note { margin-top: 14px; font-size: 0.84rem; color: var(--faint); }
.footer-col span { display: block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--muted); font-size: 0.96rem; padding: 5px 0; transition: color 0.18s ease; }
.footer-col a:hover { color: var(--accent-ink); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(40px, 5vw, 64px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--muted);
  flex-wrap: wrap;
}
.footer-legal { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; }
.footer-icp { color: var(--muted); transition: color 0.18s ease; }
.footer-icp:hover { color: var(--ink); }

/* ---- Language gate (root) ---- */
.lang-gate { min-height: 100vh; display: grid; place-items: center; }
.lang-gate main { text-align: center; display: grid; justify-items: center; gap: 28px; }
.lang-gate .brand { font-size: 1.6rem; }
.lang-gate-lead { color: var(--muted); font-size: 1.05rem; }
.lang-gate-links { display: flex; gap: 16px; }
.lang-gate-links a {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--ink);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 12px 32px;
  transition: all 0.2s ease;
}
.lang-gate-links a:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---- Download ---- */
.dl-head { max-width: 760px; margin-bottom: 36px; }
.dl-version { font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); margin: 12px 0 16px; }
.dl-latest { display: inline-block; font-size: 0.82rem; font-weight: 600; color: var(--accent-ink); background: var(--accent-soft); border-radius: 999px; padding: 5px 13px; margin: 14px 0 16px; }
.dl-checksums { margin-top: 16px; }
.dl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.dl-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.dl-card:not(.soon):hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.dl-card.soon { background: var(--paper); }
.dl-os { font-family: var(--font-display); font-size: 1.5rem; color: var(--ink); }
.dl-sub { font-size: 0.86rem; color: var(--muted); margin-bottom: 18px; }
.dl-card .button { margin-top: auto; }
.button.disabled { background: transparent; color: var(--faint); border-color: var(--line); cursor: not-allowed; pointer-events: none; }
.dl-mirror { margin-top: 10px; font-size: 0.85rem; }
.dl-sha { margin-top: 14px; width: 100%; }
.dl-sha summary { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.06em; color: var(--muted); cursor: pointer; }
.dl-sha code { display: block; margin-top: 8px; font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-2); word-break: break-all; background: var(--paper-2); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; }
.dl-soon-note {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  margin-top: 24px; padding: 24px 28px; background: var(--accent-soft); border-radius: var(--radius-lg);
}
.dl-soon-note p { color: var(--accent-ink); font-weight: 500; max-width: 58ch; }
.dl-soon-note .button { white-space: nowrap; }
.dl-reqs { margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--line); }
.dl-reqs-title { display: block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-bottom: 14px; }
.dl-reqs ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; }
.dl-reqs li { color: var(--muted); }
.dl-reqs li::marker { color: var(--accent); }
.dl-cli { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 5vw, 64px); align-items: center; }
.dl-cli-copy h2 { margin: 16px 0 14px; font-size: clamp(1.7rem, 3vw, 2.4rem); }
.dl-install { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; box-shadow: var(--shadow-sm); }
.dl-install-label { display: block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-bottom: 14px; }
.dl-install pre { margin: 0; background: #14130f; color: #e9e3d4; border-radius: var(--radius); padding: 18px 20px; overflow-x: auto; font-size: 0.92rem; }
.dl-verify-text { color: var(--ink-2); font-size: 1.05rem; line-height: 1.7; }
.dl-verify-text code { font-family: var(--font-mono); font-size: 0.86em; background: var(--paper-2); border: 1px solid var(--line); border-radius: 6px; padding: 0.1em 0.4em; }
.dl-unsigned { margin-top: 18px; color: var(--muted); font-size: 0.95rem; }

/* ---- Reveal animation ---- */
.reveal { opacity: 0; transform: translateY(16px); animation: reveal 0.85s cubic-bezier(0.2, 0.7, 0.2, 1) forwards; }
.reveal.d1 { animation-delay: 0.08s; }
.reveal.d2 { animation-delay: 0.16s; }
.reveal.d3 { animation-delay: 0.24s; }
.reveal.d4 { animation-delay: 0.34s; }
@keyframes reveal { to { opacity: 1; transform: none; } }

/* ---- Responsive ---- */
@media (max-width: 1000px) {
  .doc-layout { grid-template-columns: 200px minmax(0, 1fr); }
  .doc-toc { display: none; }
  .platform-groups { grid-template-columns: repeat(2, 1fr); }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav-burger {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px; height: 44px;
    border: 1px solid var(--line-2);
    border-radius: 11px;
    cursor: pointer;
    padding: 0 11px;
  }
  .nav-burger span { display: block; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.24s ease, opacity 0.2s ease; }
  .nav-panel {
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 22px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg);
    padding: 26px 24px 30px;
    display: none;
  }
  .nav-toggle:checked ~ .nav-panel { display: flex; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-links { flex-direction: column; align-items: flex-start; gap: 6px; }
  .nav-links a { font-size: 1.1rem; padding: 8px 0; }
  .nav-actions { width: 100%; justify-content: space-between; }
  .nav-actions .button { flex: 1; }

  /* Dropdowns become inline, indented sub-lists on mobile. */
  .nav-group { flex-direction: column; align-items: flex-start; width: 100%; }
  .nav-group::after { display: none; }
  .nav-caret { display: none; }
  .nav-sub {
    position: static; opacity: 1; visibility: visible; pointer-events: auto;
    transform: none; margin: 4px 0 10px; padding: 0 0 0 14px; width: auto;
    background: transparent; border: none; box-shadow: none;
    border-left: 2px solid var(--line); border-radius: 0;
  }
  .nav-sub .nav-sub-item { padding: 8px 10px; }
  .nav-sub-desc { display: none; }
  .nav-sub .nav-sub-all { border-top: none; margin: 2px 0 0; padding: 8px 10px; }

  .hero-grid, .workflow-grid, .split, .contact-grid, .dl-cli { grid-template-columns: 1fr; }
  .product-grid, .why-grid, .tier-grid, .post-grid { grid-template-columns: 1fr; }
  .post-card.feature { grid-template-columns: 1fr; padding: 34px; }
  .stat-row { grid-template-columns: 1fr; }
  .stat { border-right: none; border-bottom: 1px solid var(--line); padding: 22px 0; }
  .stat:last-child { border-bottom: none; }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-sidebar { position: static; margin-bottom: 16px; }
  .hero-visual { order: 2; }
  .section-head-row { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .platform-groups, .capability-grid { grid-template-columns: 1fr; }
  .product-card, .why-card, .tier-card, .post-card { padding: 26px; }
  .viz-body { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .viz-window { transform: none; }
}

@media print {
  .site-header, .site-footer, .grain, .hero-visual { display: none; }
}