/* ───────────── Tokens ───────────── */
:root {
  --bg: #000000;
  --bg-elev: #0a0a0a;
  --bg-card: #060606;
  --fg: #fafaf7;
  --fg-dim: rgba(250, 250, 247, 0.62);
  --muted: rgba(250, 250, 247, 0.38);
  --line: rgba(250, 250, 247, 0.08);
  --line-strong: rgba(250, 250, 247, 0.18);
  --paper: #f4f1ea;
  --ink: #0a0a0a;

  --acc-1: #6366f1;
  --acc-2: #ec4899;
  --acc-3: #f59e0b;
  --gradient: linear-gradient(135deg, var(--acc-1) 0%, var(--acc-2) 50%, var(--acc-3) 100%);

  /* Type system — heavy mono + tight display */
  --font-display: 'Inter Tight', 'Inter', 'Helvetica Neue', system-ui, sans-serif;
  --font-head: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif; /* reserved – not used by default */

  --pad-x: clamp(20px, 4vw, 88px);
  --maxw: 1440px;

  --density: 1;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11", "ss03";
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }

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

/* shared mono-heading "tech" type — used on every section h2 */
.h-mono {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 0.96;
  text-transform: none;
}
.h-display {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.88;
}
.h-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  font-weight: 500;
}

/* ───────────── Header ───────────── */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 90;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--pad-x);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: background 240ms ease, backdrop-filter 240ms ease, border-color 240ms ease;
  border-bottom: 1px solid transparent;
}
.header.scrolled {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom-color: var(--line);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 500; letter-spacing: 0.06em;
}
.brand .mono-mark {
  width: 26px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--fg);
  font-size: 10px; letter-spacing: 0;
  font-weight: 500;
}
.nav {
  display: flex; gap: 28px;
}
.nav a {
  opacity: 0.65; transition: opacity 160ms;
}
.nav a:hover { opacity: 1; }
.header-right {
  display: flex; align-items: center; gap: 16px;
}
.lang-toggle {
  display: inline-flex; gap: 2px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 2px;
}
.lang-toggle button {
  padding: 4px 10px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.08em;
  opacity: 0.6;
}
.lang-toggle button.active {
  background: var(--fg); color: var(--bg); opacity: 1;
}
.btn-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--fg); color: var(--bg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  font-weight: 500;
  transition: transform 160ms ease, box-shadow 220ms ease;
}
.btn-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 32px rgba(250,250,247,0.18); }
.btn-cta.gradient {
  background: var(--gradient);
  color: white;
}
.btn-cta .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* ───────────── Hero ───────────── */
.hero {
  position: relative;
  height: 100vh; min-height: 760px;
  width: 100%;
  overflow: hidden;
  display: flex; flex-direction: column;
  isolation: isolate;
  background: #000;
}
.hero-canvas {
  position: absolute; inset: 0; z-index: 0;
}
.hero-canvas canvas {
  display: block; width: 100%; height: 100%;
}
.hero-vignette {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(80% 50% at 50% 45%, transparent 0%, rgba(0,0,0,0.55) 80%, var(--bg) 100%),
    linear-gradient(180deg, rgba(0,0,0,0.45) 0%, transparent 18%, transparent 70%, var(--bg) 100%);
}
.hero-overlay {
  position: relative; z-index: 2;
  flex: 1;
  display: grid;
  grid-template-rows: 1fr auto auto;
  pointer-events: none;
}
.hero-overlay > * { pointer-events: auto; }
.hero-center {
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.hero-bottom {
  padding: 0 var(--pad-x) calc(60px * var(--density));
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 60px;
  flex-wrap: wrap;
}
.hero-tagline {
  max-width: 460px;
  display: flex; flex-direction: column; gap: 18px;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  display: flex; align-items: center; gap: 12px;
}
.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--fg); display: inline-block;
}
.hero-slogan {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(20px, 2.0vw, 28px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--fg);
}
.hero-slogan b {
  font-weight: 600;
  color: transparent;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-actions {
  display: inline-flex; flex-direction: column; align-items: flex-end;
  gap: 14px;
  pointer-events: auto;
}
.btn-big {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 24px;
  border-radius: 999px;
  background: var(--fg); color: var(--bg);
  font-family: var(--font-mono);
  font-size: 13px; font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: transform 200ms cubic-bezier(.2,.7,.3,1), box-shadow 320ms;
}
.btn-big:hover { transform: translateY(-2px); box-shadow: 0 18px 56px rgba(250,250,247,0.22); }
.btn-big.gradient { background: var(--gradient); color: white; }
.btn-big.gradient:hover { box-shadow: 0 18px 56px rgba(236, 72, 153, 0.4); }
.btn-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  display: inline-flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 4px;
  transition: color 160ms;
  letter-spacing: 0.04em;
}
.btn-link:hover { color: var(--fg); }

/* ───────────── Hero inline input (chat starter) ───────────── */
.hero-chat-input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(8, 8, 8, 0.78);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  width: 100%;
  max-width: 560px;
  transition: border-color 220ms, box-shadow 220ms, transform 220ms;
}
.hero-chat-input:focus-within {
  border-color: var(--fg);
  box-shadow: 0 16px 40px rgba(0,0,0,0.5), 0 0 0 4px rgba(250,250,247,0.06);
  transform: translateY(-1px);
}
.hero-chat-input input {
  flex: 1; min-width: 0;
  background: transparent;
  border: 0; outline: 0;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 8px 0;
}
.hero-chat-input input::placeholder { color: var(--muted); }
.hero-chat-input button {
  flex-shrink: 0;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--fg); color: var(--bg);
  display: inline-flex; align-items: center; justify-content: center;
  transition: transform 200ms, background 200ms;
}
.hero-chat-input button:hover { transform: translateY(-1px) scale(1.04); }
.hero-chat-input button.gradient { background: var(--gradient); color: white; }
.hero-chat-input .quickreplies {
  /* sits BELOW the input — handled by separate row */
  display: none;
}
.hero-chat-row {
  display: flex; flex-direction: column; gap: 14px;
  width: 100%; max-width: 580px;
}
.hero-chat-quick {
  display: flex; gap: 6px; flex-wrap: wrap;
}
.hero-chat-quick button {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg-dim);
  background: rgba(8,8,8,0.6);
  backdrop-filter: blur(8px);
  transition: color 200ms, border-color 200ms, transform 200ms;
}
.hero-chat-quick button:hover { color: var(--fg); border-color: var(--fg-dim); transform: translateY(-1px); }
.stack-strip {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.stack-strip-track {
  display: inline-flex;
  white-space: nowrap;
  animation: scroll-x 60s linear infinite;
  padding: 16px 0;
}
.stack-strip-track span {
  display: inline-flex; align-items: center;
  padding: 0 28px;
  position: relative;
}
.stack-strip-track span::after {
  content: '·';
  position: absolute; right: -2px;
  opacity: 0.4;
}
@keyframes scroll-x {
  to { transform: translateX(-50%); }
}

/* ───────────── Section base ───────────── */
.section {
  position: relative;
  padding: clamp(120px, 16vh, 240px) var(--pad-x);
}
.section-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  display: inline-flex; align-items: center; gap: 12px;
}
.section-num::before {
  content: ''; width: 28px; height: 1px; background: currentColor;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 12px;
}
.eyebrow::before {
  content: ''; width: 18px; height: 1px; background: currentColor;
}

/* ───────────── Chapters ───────────── */
.chapter {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(40px, 6vw, 120px);
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: clamp(80px, 12vh, 160px);
  margin-top: clamp(80px, 12vh, 160px);
}
.chapter:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.chapter-left {
  display: flex; flex-direction: column;
}
.chapter-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 12px;
}
.chapter-num::before {
  content: ''; width: 28px; height: 1px; background: currentColor;
}
.chapter h2 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(32px, 4.2vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin: 0 0 28px;
  text-wrap: balance;
}
.chapter-text p {
  max-width: 540px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  letter-spacing: -0.005em;
  color: var(--fg-dim);
  margin: 0 0 16px;
}
.chapter-bullets {
  margin: 28px 0;
  padding: 0;
  list-style: none;
  display: flex; flex-direction: column;
  gap: 12px;
}
.chapter-bullets li {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg);
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: baseline;
}
.chapter-bullets li::before {
  content: '+';
  color: var(--muted);
  font-weight: 400;
}
.chapter-meta {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; gap: 28px; align-items: center;
  flex-wrap: wrap;
  font-family: var(--font-mono);
}
.chapter-meta .price {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg);
}
.chapter-meta .price span {
  color: var(--muted);
}
.chapter-right {
  position: sticky;
  top: 96px;
  min-height: clamp(440px, 60vh, 720px);
  overflow: visible;
  background: transparent;
  border: 0;
  border-radius: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 20px 0;
}

/* ───────────── Cases ───────────── */
.cases {
  padding: clamp(120px, 16vh, 240px) 0;
}
.cases-head {
  padding: 0 var(--pad-x);
  display: flex; justify-content: space-between; align-items: end;
  margin-bottom: 64px;
  gap: 40px;
  flex-wrap: wrap;
}
.cases-head h2 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(32px, 4.4vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 720px;
}
.cases-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(420px, 28vw);
  gap: 24px;
  overflow-x: auto;
  padding: 4px var(--pad-x) 40px;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}
.cases-rail::-webkit-scrollbar { display: none; }
.case-card {
  scroll-snap-align: start;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 32px;
  display: flex; flex-direction: column;
  justify-content: space-between;
  min-height: 540px;
  background: var(--bg-card);
  transition: border-color 220ms ease, transform 220ms ease, background 220ms ease;
  position: relative; overflow: hidden;
}
.case-card:hover {
  border-color: var(--line-strong);
  background: #0d0d0d;
}
.case-card .case-id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
  display: flex; gap: 12px; align-items: center;
}
.case-card .case-id::after {
  content: ''; flex: 1; height: 1px; background: var(--line);
}
.case-card .case-metric {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(56px, 4.6vw, 88px);
  line-height: 0.96;
  letter-spacing: -0.04em;
  margin: 32px 0 16px;
  text-wrap: balance;
}
.case-card .case-metric-label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: -0.005em;
  color: var(--fg-dim);
  line-height: 1.55;
  max-width: 320px;
  margin-bottom: 32px;
}
.case-card .case-desc {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--fg);
  margin: 0 0 20px;
  max-width: 380px;
}
.case-card .case-tags {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.case-card .tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-dim);
}
.case-card .case-timeline {
  margin-top: 24px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  max-height: 0; opacity: 0;
  transition: max-height 320ms ease, opacity 220ms ease, margin-top 220ms ease, padding-top 220ms ease;
  overflow: hidden;
}
.case-card:hover .case-timeline {
  max-height: 180px; opacity: 1;
}
.case-card .step { color: var(--fg-dim); }
.case-card .step span { display: block; color: var(--muted); margin-bottom: 6px; }
.case-card .step.now span { color: var(--acc-3); }

/* ───────────── Process ───────────── */
.process {
  position: relative;
}
.process-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}
.process-head {
  position: sticky; top: 96px;
}
.process-head h2 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(32px, 4.4vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin: 16px 0 24px;
}
.process-head p {
  font-family: var(--font-mono);
  font-size: 13px; line-height: 1.65; letter-spacing: -0.005em;
  color: var(--fg-dim); max-width: 380px;
}
.process-steps {
  display: flex; flex-direction: column;
  gap: clamp(60px, 10vh, 140px);
}
.process-step {
  padding: 48px 0;
  border-top: 1px solid var(--line);
  display: grid; grid-template-columns: auto 1fr;
  gap: 32px; align-items: start;
  position: relative;
}
.process-step:first-child { border-top: 0; padding-top: 0; }
.step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
  position: relative;
  padding-top: 6px;
}
.step-num.active {
  color: transparent;
  background: var(--gradient);
  background-clip: text;
  -webkit-background-clip: text;
}
.step-body h3 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(24px, 2.8vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}
.step-body p {
  font-family: var(--font-mono);
  font-size: 13px; line-height: 1.65; letter-spacing: -0.005em;
  color: var(--fg-dim);
  margin: 0 0 16px;
  max-width: 540px;
}
.step-tags {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-top: 20px;
}
.step-tags .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-dim);
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

/* ───────────── Pain ───────────── */
.pain h2 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(34px, 5.2vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  text-wrap: balance;
  max-width: 1100px;
}
.pain-sub {
  font-family: var(--font-mono);
  font-size: 13.5px; color: var(--fg-dim); max-width: 600px; line-height: 1.65; margin: 0 0 56px;
  letter-spacing: -0.005em;
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.pain-grid button {
  text-align: left;
  padding: 32px 28px;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  transition: background 220ms, color 220ms;
  min-height: 180px;
  display: flex; flex-direction: column; justify-content: space-between;
  gap: 24px;
  position: relative;
  overflow: hidden;
}
.pain-grid button:hover {
  background: var(--bg-elev);
}
.pain-grid button .arrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
  display: flex; align-items: center; gap: 10px;
  transition: color 220ms, transform 220ms;
  font-weight: 400;
  white-space: nowrap;
}
.pain-grid button:hover .arrow { color: var(--fg); transform: translateX(4px); }

/* ───────────── FAQ ───────────── */
.faq h2 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(32px, 4.4vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin: 0 0 56px;
  max-width: 720px;
}
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  text-align: left;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(17px, 1.6vw, 22px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.faq-q .marker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: transform 240ms, color 240ms;
  white-space: nowrap;
}
.faq-item.open .marker { color: var(--fg); transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 360ms ease;
}
.faq-item.open .faq-a { max-height: 320px; }
.faq-a-inner {
  padding: 0 0 28px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: -0.005em;
  color: var(--fg-dim);
  max-width: 760px;
}

/* ───────────── Final CTA ───────────── */
.cta-final {
  background: var(--bg);
  border-top: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.cta-final::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(40% 50% at 30% 100%, rgba(99,102,241,0.14), transparent 70%),
    radial-gradient(40% 50% at 80% 0%, rgba(236,72,153,0.08), transparent 70%);
  pointer-events: none;
}
.cta-final-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: center;
}
.cta-final h2 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(36px, 5.2vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 0 0 32px;
  text-wrap: balance;
}
.cta-final h2 b {
  font-weight: 600;
  color: transparent;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
}
.cta-final p {
  font-family: var(--font-mono);
  font-size: 13.5px; line-height: 1.65;
  letter-spacing: -0.005em;
  color: var(--fg-dim);
  max-width: 480px;
  margin: 0 0 32px;
}
.cta-final-meta {
  display: flex; gap: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.cta-final-meta div { display: flex; align-items: center; gap: 8px; }
.cta-final-meta .dot { width: 6px; height: 6px; background: var(--acc-3); border-radius: 50%; }

/* Embedded chat */
.chat-embed {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-elev);
  padding: 0;
  overflow: hidden;
  display: flex; flex-direction: column;
  min-height: 540px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.4), 0 0 0 1px var(--line-strong);
}
.chat-head {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}
.chat-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--gradient);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: white;
}
.chat-head-meta { flex: 1; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.chat-head-meta .name {
  font-family: var(--font-mono);
  font-size: 13px; font-weight: 500;
}
.chat-head-meta .status {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex; align-items: center; gap: 6px;
}
.chat-head-meta .status .dot {
  width: 6px; height: 6px; border-radius: 50%; background: #10b981;
  box-shadow: 0 0 0 0 rgba(16,185,129,0.7);
  animation: pulse 2.4s infinite;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex; flex-direction: column;
  gap: 14px;
  scrollbar-width: thin;
}
.msg {
  max-width: 82%;
  padding: 14px 16px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
}
.msg.bot {
  align-self: flex-start;
  background: rgba(250,250,247,0.06);
  border-bottom-left-radius: 4px;
  color: var(--fg);
}
.msg.user {
  align-self: flex-end;
  background: var(--fg);
  color: var(--bg);
  border-bottom-right-radius: 4px;
}
.msg .code-block {
  display: block; margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(0,0,0,0.3);
  padding: 10px 12px; border-radius: 6px;
  color: var(--acc-3);
}
.typing {
  align-self: flex-start;
  display: inline-flex; gap: 4px;
  padding: 14px 16px;
  background: rgba(250,250,247,0.06);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
}
.typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--fg);
  opacity: 0.4;
  animation: typing 1.2s infinite;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}
.chat-quickreplies {
  padding: 0 20px 16px;
  display: flex; gap: 8px; flex-wrap: wrap;
}
.qr {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg);
  transition: background 200ms, transform 200ms;
}
.qr:hover { background: rgba(250,250,247,0.08); transform: translateY(-1px); }
.chat-input {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
}
.chat-input input {
  flex: 1; background: transparent;
  border: 0; outline: 0;
  font: inherit; color: var(--fg);
  font-size: 15px;
}
.chat-input input::placeholder { color: var(--muted); }
.chat-input button {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--fg); color: var(--bg);
  display: inline-flex; align-items: center; justify-content: center;
}

/* ───────────── Floating chat ───────────── */
.fab {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 80;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 20px 14px 16px;
  border-radius: 999px;
  background: var(--fg); color: var(--bg);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  font-weight: 500;
  box-shadow: 0 20px 50px rgba(0,0,0,0.45), 0 0 0 1px rgba(255,255,255,0.05);
  transition: transform 220ms cubic-bezier(.2,.7,.3,1);
  text-transform: uppercase;
}
.fab:hover { transform: translateY(-2px); }
.fab .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16,185,129,0.7);
  animation: pulse 2.4s infinite;
}
.fab.gradient { background: var(--gradient); color: white; }
.chat-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: min(460px, 100vw);
  background: var(--bg-elev);
  border-left: 1px solid var(--line-strong);
  z-index: 95;
  transform: translateX(100%);
  transition: transform 360ms cubic-bezier(.2,.7,.3,1);
  display: flex; flex-direction: column;
  box-shadow: -30px 0 80px rgba(0,0,0,0.5);
}
.chat-drawer.open { transform: translateX(0); }
.chat-drawer .chat-close {
  position: absolute; top: 12px; left: -42px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  color: var(--fg);
  display: inline-flex; align-items: center; justify-content: center;
}
.chat-drawer .chat-embed {
  border: 0; border-radius: 0; box-shadow: none;
  height: 100%; min-height: 0;
}

/* ───────────── Footer ───────────── */
.footer {
  border-top: 1px solid var(--line);
  padding: 80px var(--pad-x) 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
  margin: 0 0 18px;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer ul a {
  font-family: var(--font-mono);
  font-size: 12px; color: var(--fg-dim);
  letter-spacing: 0.02em;
  transition: color 160ms;
}
.footer ul a:hover { color: var(--fg); }
.footer .brand-block .brand { font-size: 13px; margin-bottom: 24px; font-family: var(--font-mono); }
.footer .brand-block p {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim); line-height: 1.5; max-width: 280px;
  letter-spacing: 0.02em;
}
.footer-bottom {
  grid-column: 1 / -1;
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ───────────── Anim primitives ───────────── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 800ms cubic-bezier(.2,.7,.3,1), transform 800ms cubic-bezier(.2,.7,.3,1);
}
.fade-up.in {
  opacity: 1;
  transform: translateY(0);
}

/* Hero brand letter reveal */
.brand-letter {
  display: inline-block;
  opacity: 0;
  transform: translateY(28px);
  animation: letter-in 700ms cubic-bezier(.2,.7,.3,1) forwards;
}
@keyframes letter-in {
  to { opacity: 1; transform: translateY(0); }
}

/* ───────────── Mobile ───────────── */
@media (max-width: 880px) {
  .nav { display: none; }
  .header-right .btn-cta span.long { display: none; }
  .chapter { grid-template-columns: 1fr; gap: 32px; }
  .chapter-right { position: static; height: 340px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-head { position: static; }
  .cta-final-inner { grid-template-columns: 1fr; }
  .footer { grid-template-columns: 1fr 1fr; }
  .footer .brand-block { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .cases-rail { grid-auto-columns: 84vw; }
  .case-card { min-height: 480px; }
  .case-card:hover .case-timeline { max-height: 0; opacity: 0; margin-top: 0; padding-top: 0; }
  .pain-grid { grid-template-columns: 1fr; }
  .pain-grid button { min-height: 140px; font-size: 17px; }
  .header { padding: 14px var(--pad-x); }
  .lang-toggle { display: none; }
  .stack-strip-track { animation-duration: 40s; }
  .hero-bottom { flex-direction: column; align-items: flex-start; }
  .hero-actions { align-items: flex-start; }

  /* Bottom-sheet chat on mobile */
  .chat-drawer {
    width: 100vw;
    height: 80vh;
    top: auto;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
    border-radius: 18px 18px 0 0;
    transform: translateY(100%);
  }
  .chat-drawer.open { transform: translateY(0); }
  .chat-drawer .chat-close {
    top: -42px; left: 50%; transform: translateX(-50%);
  }
}

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