:root {
  --ink: #101820;
  --ink-soft: #3d4a57;
  --muted: #6b7a89;
  --paper: #e7eef2;
  --paper-deep: #d5e0e8;
  --panel: rgba(255, 255, 255, 0.55);
  --line: rgba(16, 24, 32, 0.12);
  --accent: #0f7a6a;
  --accent-hot: #e85d2a;
  --accent-soft: #b8e4d8;
  --shadow: 0 18px 40px rgba(16, 24, 32, 0.08);
  --font-display: "Bricolage Grotesque", sans-serif;
  --font-body: "Figtree", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(184, 228, 216, 0.55), transparent 55%),
    radial-gradient(900px 500px at 0% 20%, rgba(232, 93, 42, 0.08), transparent 50%),
    linear-gradient(180deg, #f3f7f9 0%, var(--paper) 40%, #edf3f6 100%);
  min-height: 100vh;
}

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

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.25rem;
  border-radius: 0.55rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s ease, color 0.25s ease,
    border-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: #f4f8fa;
}

.btn-primary:hover {
  background: #1c2a36;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink);
}

.link-quiet {
  font-weight: 500;
  color: var(--ink-soft);
}

.link-quiet:hover {
  color: var(--ink);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem clamp(1.25rem, 4vw, 2.5rem);
  backdrop-filter: blur(14px);
  background: rgba(243, 247, 249, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.04em;
}

.brand-mark {
  width: 1.55rem;
  height: 1.55rem;
  flex-shrink: 0;
  border-radius: 0;
}

.hero-mark {
  width: clamp(2.75rem, 8vw, 4.5rem);
  height: clamp(2.75rem, 8vw, 4.5rem);
  border-radius: 0;
  flex-shrink: 0;
}

.brand-word {
  line-height: 1;
}

.nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.nav a:hover {
  color: var(--ink);
}

.header-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 1rem;
}

/* Hero — one composition */
.hero {
  position: relative;
  min-height: min(100vh, 880px);
  display: grid;
  grid-template-columns: 1fr;
  align-items: end;
  padding: clamp(2rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2.5rem) 3rem;
  overflow: hidden;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 34rem;
  padding-bottom: 1rem;
  animation: rise 0.9s var(--ease) both;
}

.hero-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(4.5rem, 14vw, 8.5rem);
  line-height: 0.85;
  letter-spacing: -0.06em;
  margin: 0 0 1.1rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.hero-mark {
  width: clamp(2.75rem, 8vw, 4.5rem);
  height: clamp(2.75rem, 8vw, 4.5rem);
  border-radius: 0;
  flex-shrink: 0;
}

.footer-brand-row {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  font-weight: 700;
  max-width: 16ch;
  margin-bottom: 0.75rem;
}

.hero-lede {
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 34ch;
  margin-bottom: 1.5rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

#mesh {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.9;
}

.hero-glow {
  position: absolute;
  inset: auto -10% -20% 30%;
  height: 55%;
  background: radial-gradient(ellipse at center, rgba(15, 122, 106, 0.22), transparent 65%);
  animation: pulse 6s ease-in-out infinite;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.7;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
}

/* Trust */
.trust {
  padding: 1.75rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.35);
}

.trust-label {
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.trust-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem 2.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink-soft);
  opacity: 0.85;
}

/* Shared section rhythm */
.split,
.unify,
.assistant,
.triad,
.docs-agents,
.familiar,
.toolkit,
.closing {
  padding: clamp(3.5rem, 8vw, 6rem) clamp(1.25rem, 4vw, 2.5rem);
  max-width: calc(var(--max) + 5rem);
  margin: 0 auto;
}

.section-intro,
.section-lede {
  max-width: 38rem;
}

.section-lede {
  color: var(--ink-soft);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.split h2,
.unify h2,
.assistant h2,
.docs-agents h2,
.familiar h2,
.toolkit h2,
.closing h2 {
  font-size: clamp(2rem, 4vw, 2.85rem);
  max-width: 16ch;
}

/* Split */
.split-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.split-panel {
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.split-panel h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.split-panel p {
  color: var(--ink-soft);
}

/* Unify */
.unify {
  text-align: left;
}

.surface-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.surface-list li {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  padding: 1.1rem 0;
  border-top: 2px solid var(--accent);
  color: var(--ink);
}

/* Assistant */
.assistant {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.assistant-copy p {
  color: var(--ink-soft);
  max-width: 34ch;
}

.assistant-demo {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  animation: rise 1s var(--ease) 0.15s both;
}

.demo-line {
  padding: 0.85rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
}

.demo-line--in {
  background: rgba(16, 24, 32, 0.06);
  align-self: flex-end;
  max-width: 90%;
}

.demo-line--out {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.02em;
  padding-left: 0.25rem;
}

.demo-line--hit {
  background: #fff;
  border: 1px solid var(--line);
  max-width: 95%;
}

/* Triad */
.triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  max-width: none;
  width: 100%;
  padding-left: clamp(1.25rem, 4vw, 2.5rem);
  padding-right: clamp(1.25rem, 4vw, 2.5rem);
}

.triad article {
  max-width: 22rem;
}

.triad h3 {
  font-size: 1.25rem;
}

.triad p {
  color: var(--ink-soft);
}

/* Docs / steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.steps li {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.steps li span {
  color: var(--accent-hot);
  font-variant-numeric: tabular-nums;
}

.steps li:last-child {
  border-bottom: 1px solid var(--line);
}

/* Familiar UI */
.familiar-visual {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 1rem;
  margin-top: 0.5rem;
}

.pane {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  overflow: hidden;
  min-height: 220px;
}

.pane header {
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  background: rgba(213, 224, 232, 0.35);
}

.pane ul {
  list-style: none;
  margin: 0;
  padding: 0.5rem;
}

.pane li {
  padding: 0.7rem 0.85rem;
  border-radius: 0.4rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.pane li.active {
  background: rgba(15, 122, 106, 0.12);
  color: var(--ink);
}

.pane-wide .bars {
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.pane-wide .bars span {
  display: block;
  height: 2.25rem;
  width: var(--w);
  border-radius: 0.35rem;
  background: linear-gradient(90deg, var(--accent-soft), rgba(15, 122, 106, 0.35));
  transform-origin: left center;
  animation: growBar 1.1s var(--ease) both;
}

.pane-wide .bars span:nth-child(2) {
  animation-delay: 0.12s;
}

.pane-wide .bars span:nth-child(3) {
  animation-delay: 0.24s;
}

@keyframes growBar {
  from {
    transform: scaleX(0.15);
    opacity: 0.4;
  }
  to {
    transform: scaleX(1);
    opacity: 1;
  }
}

/* Toolkit — not card-heavy; hairline rows */
.toolkit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.toolkit-list li {
  padding: 1.5rem 1.25rem 1.5rem 0;
  border-top: 1px solid var(--line);
}

.toolkit-list h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.toolkit-list p {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* Closing */
.closing {
  text-align: center;
  padding-bottom: clamp(4rem, 10vw, 7rem);
}

.closing h2 {
  max-width: none;
  margin-left: auto;
  margin-right: auto;
}

.closing p {
  color: var(--ink-soft);
  max-width: 32ch;
  margin: 0 auto 1.75rem;
}

.closing-cta {
  justify-content: center;
}

/* Footer */
.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 2rem;
  align-items: end;
  padding: 2.5rem clamp(1.25rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  background: rgba(16, 24, 32, 0.03);
}

.footer-brand strong {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.footer-brand-row {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand p {
  color: var(--muted);
  margin-top: 0.35rem;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--ink);
}

.footer-copy {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}

/* Docs page */
.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.docs-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 2.5rem;
  max-width: calc(var(--max) + 5rem);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 4vw, 2.5rem) 4rem;
}

.docs-nav {
  position: sticky;
  top: 5rem;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.docs-nav-label {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

.docs-nav a:hover,
.docs-nav a[aria-current="page"] {
  color: var(--ink);
}

.docs-content {
  max-width: 42rem;
}

.docs-hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  max-width: 18ch;
}

.docs-hero p {
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.docs-content section {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
}

.docs-content h2 {
  font-size: 1.55rem;
}

.docs-content ul,
.docs-content ol {
  color: var(--ink-soft);
  padding-left: 1.2rem;
}

.docs-content li {
  margin-bottom: 0.45rem;
}

.docs-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.docs-dl {
  margin: 0;
}

.docs-dl dt {
  font-family: var(--font-display);
  font-weight: 700;
  margin-top: 1rem;
}

.docs-dl dd {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
}

.docs-steps {
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
}

.docs-code {
  margin: 0 0 1rem;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  background: rgba(16, 24, 32, 0.92);
  color: #e8f2ef;
  border-radius: 0.65rem;
  font-size: 0.86rem;
  line-height: 1.5;
}

.docs-code code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.docs-content :not(pre) > code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: 0.3rem;
  background: rgba(16, 24, 32, 0.06);
}

.docs-table-wrap {
  overflow-x: auto;
}

.docs-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.docs-content th,
.docs-content td {
  text-align: left;
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--line);
}

.docs-content th {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 600;
}

.docs-cta {
  margin-top: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

/* Form pages */
.form-page {
  min-height: calc(100vh - 4.5rem);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem clamp(1.25rem, 4vw, 2.5rem) 4rem;
}

.form-panel {
  width: 100%;
  max-width: 28rem;
}

.form-panel h1 {
  font-size: clamp(1.85rem, 4vw, 2.35rem);
  max-width: 14ch;
}

.form-lede {
  color: var(--ink-soft);
  margin-bottom: 1.75rem;
}

.gate-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field label {
  font-weight: 600;
  font-size: 0.92rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  font: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field textarea {
  min-height: 6.5rem;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 122, 106, 0.18);
}

.field input.is-invalid,
.field input[aria-invalid="true"] {
  border-color: #c0392b;
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
}

.field-hint {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
}

.field-error {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 600;
  color: #a5281b;
}

.btn-block {
  width: 100%;
  margin-top: 0.35rem;
}

.form-alt {
  margin-top: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.form-alt a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-success {
  padding: 1.5rem 0;
}

.form-success h2 {
  font-size: 1.75rem;
}

.form-success p {
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .split-grid,
  .assistant,
  .familiar-visual,
  .triad,
  .toolkit-list,
  .surface-list {
    grid-template-columns: 1fr;
  }

  .surface-list {
    gap: 0;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .hero {
    min-height: 85vh;
    align-items: center;
  }

  .hero-copy {
    max-width: 100%;
  }

  .docs-layout {
    grid-template-columns: 1fr;
  }

  .docs-nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.75rem 1.1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
  }

  .docs-nav-label {
    width: 100%;
  }
}

@media (max-width: 560px) {
  .header-actions .link-quiet {
    display: none;
  }

  .hero-brand {
    font-size: clamp(3.5rem, 18vw, 5rem);
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-row .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}