@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700&display=swap');

:root {
  --color-porcelain: #f7f8f6;
  --color-surface: #ffffff;
  --color-mist: #e6ebf0;
  --color-ink: #10263f;
  --color-ink-muted: #5b6b7c;
  --color-ink-subtle: #8a97a5;
  --color-coral: #ff654a;
  --color-coral-hover: #e85a41;
  --color-coral-soft: #ffe8e3;
  --color-sage-strong: #3d7a5f;
  --color-sage-soft: #e8f2ec;
  --color-intelligence: #eef3f8;
  --color-bg: var(--color-porcelain);
  --color-fg: var(--color-ink);
  --color-fg-muted: var(--color-ink-muted);
  --color-border: var(--color-mist);
  --color-action: var(--color-coral);
  --font-sans: 'Instrument Sans', system-ui, sans-serif;
  --radius-md: 14px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 2px rgb(16 38 63 / 4%), 0 8px 24px rgb(16 38 63 / 5%);
  --shadow-md: 0 4px 16px rgb(16 38 63 / 6%);
  --motion-base: 200ms;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --container: 1120px;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --motion-base: 0ms;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1100px 520px at 8% -10%, color-mix(in srgb, var(--color-coral) 14%, transparent), transparent),
    radial-gradient(900px 480px at 96% 0%, color-mix(in srgb, var(--color-ink) 7%, transparent), transparent),
    radial-gradient(700px 360px at 50% 40%, color-mix(in srgb, var(--color-intelligence) 80%, transparent), transparent),
    var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-action);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgb(255 101 74 / 35%);
  border-radius: 8px;
}

.shell {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

/* ——— Header ——— */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 0 12px;
}

.site-header-sticky {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 14px 0;
  margin: 0 -8px;
  padding-inline: 8px;
  background: color-mix(in srgb, var(--color-porcelain) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-fg);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-ai {
  color: var(--color-action);
}

.brand-mark {
  display: grid;
  grid-template-columns: repeat(2, 8px);
  gap: 3px;
  width: 22px;
  height: 22px;
}

.brand-mark span {
  display: block;
  border-radius: 3px;
  background: var(--color-action);
}

.brand-mark span:nth-child(2) {
  opacity: 0.72;
}

.brand-mark span:nth-child(3) {
  opacity: 0.48;
}

.brand-mark span:nth-child(4) {
  opacity: 0.28;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--color-fg-muted);
  font-size: 14px;
  font-weight: 600;
}

.nav a {
  color: inherit;
}

/* ——— Buttons ——— */

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
  transition: background var(--motion-base) var(--ease-out), border-color var(--motion-base) var(--ease-out);
}

.button:hover {
  text-decoration: none;
}

.button-primary {
  background: var(--color-action);
  color: #fff;
}

.button-primary:hover {
  background: var(--color-coral-hover);
}

.button-secondary {
  background: var(--color-surface);
  color: var(--color-fg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

/* ——— Hero ——— */

.hero {
  display: grid;
  gap: 18px;
  padding: 72px 0 56px;
  min-height: min(72vh, 640px);
  align-content: center;
}

.hero-split {
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 72px;
  min-height: min(78vh, 720px);
}

.hero-copy {
  display: grid;
  gap: 16px;
  align-content: start;
}

.eyebrow {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-fg-muted);
}

.hero h1 {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.hero .lead,
.hero p {
  margin: 0;
  max-width: 42ch;
  color: var(--color-fg-muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.55;
}

/* ——— Product visual ——— */

.product-visual {
  display: grid;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(160deg, var(--color-intelligence), var(--color-surface) 58%);
  box-shadow: var(--shadow-md);
  animation: visual-in 480ms var(--ease-out) both;
}

@keyframes visual-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.product-visual-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-fg-muted);
}

.ai-state {
  display: grid;
  grid-template-columns: repeat(2, 7px);
  gap: 2px;
  width: 18px;
  height: 18px;
}

.ai-state i {
  display: block;
  border-radius: 2px;
  background: var(--color-mist);
}

.ai-state i.on {
  background: var(--color-action);
  animation: brick-pulse 2.4s var(--ease-out) infinite;
}

.ai-state i.on:nth-child(2) {
  animation-delay: 120ms;
}

@keyframes brick-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}

.decision-mock {
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.decision-kicker {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-fg-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.decision-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.decision-body {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-fg-muted);
}

.guardrail-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 28px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-porcelain);
  color: var(--color-fg-muted);
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
}

.pill-ok {
  border-color: color-mix(in srgb, var(--color-sage-strong) 28%, var(--color-border));
  background: var(--color-sage-soft);
  color: var(--color-sage-strong);
}

.gate-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 4px;
}

.gate-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-fg-muted);
}

.gate-value {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.gate-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 12px;
  background: var(--color-action);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.loop-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink-subtle);
}

.loop-strip .on {
  color: var(--color-action);
}

/* ——— Sections ——— */

.section {
  padding: 72px 0;
  border-top: 1px solid color-mix(in srgb, var(--color-border) 80%, transparent);
}

.section-header {
  display: grid;
  gap: 10px;
  margin-bottom: 32px;
  max-width: 48ch;
}

.section-header h2,
.section-close h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.section-header p,
.section-close p {
  margin: 0;
  color: var(--color-fg-muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-grid li {
  display: grid;
  gap: 8px;
  align-content: start;
  min-height: 160px;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
}

.step-num {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-action);
}

.step-grid h3,
.feature-copy h3,
.platform-lane h3 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.step-grid p,
.feature-copy p,
.platform-lane p,
.trust-grid p,
.trust-grid li {
  margin: 0;
  color: var(--color-fg-muted);
  font-size: 14px;
  line-height: 1.55;
}

/* ——— Feature rows ——— */

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
  margin-bottom: 28px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-row-reverse .feature-copy {
  order: 2;
}

.feature-row-reverse .fragment {
  order: 1;
}

.feature-copy {
  display: grid;
  gap: 10px;
  max-width: 40ch;
}

.fragment {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  min-height: 168px;
}

.fragment-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-porcelain);
  font-size: 13px;
  font-weight: 650;
}

.fragment-meta {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-fg-muted);
}

.fragment-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: auto;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-fg);
}

.chip-primary {
  border-color: transparent;
  background: var(--color-action);
  color: #fff;
}

.fragment-lab {
  background: linear-gradient(180deg, var(--color-intelligence), var(--color-surface));
}

.lab-line {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lab-line.muted {
  color: var(--color-ink-subtle);
}

.lab-bubble {
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 13px;
  line-height: 1.45;
  color: var(--color-fg);
}

.lab-bubble-ai {
  background: color-mix(in srgb, var(--color-coral-soft) 55%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-coral) 22%, var(--color-border));
}

/* ——— Platforms ——— */

.platform-lanes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.platform-lane {
  display: grid;
  gap: 10px;
  align-content: start;
  min-height: 200px;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
}

.platform-lane .pill {
  justify-self: start;
  margin-top: auto;
}

/* ——— Trust / close ——— */

.section-trust .trust-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: start;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
}

.trust-grid ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.section-close {
  display: grid;
  gap: 16px;
  justify-items: start;
  padding-bottom: 88px;
  max-width: 52ch;
}

/* ——— Footer ——— */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--color-border);
  color: var(--color-ink-subtle);
  font-size: 13px;
}

.site-footer nav {
  display: flex;
  gap: 14px;
}

.site-footer-rich {
  align-items: flex-start;
  gap: 24px;
  padding-top: 36px;
}

.footer-brand {
  margin-bottom: 8px;
  color: var(--color-fg);
  font-weight: 700;
  font-size: 15px;
}

.site-footer-rich p {
  margin: 0 0 8px;
  max-width: 52ch;
  line-height: 1.5;
}

.site-footer-rich a {
  color: var(--color-fg-muted);
}

/* ——— Legacy panel (unused on home, kept for safety) ——— */

.panel {
  display: grid;
  gap: 18px;
  padding: 28px;
  margin: 0 0 56px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  box-shadow: var(--shadow-sm);
}

.panel h2 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.panel p,
.panel li {
  color: var(--color-fg-muted);
  line-height: 1.55;
}

.panel ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

/* ——— Legal pages ——— */

.legal {
  padding: 40px 0 64px;
}

.legal h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
}

.legal .meta {
  margin: 0 0 28px;
  color: var(--color-fg-muted);
  font-size: 14px;
}

.legal-card {
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.legal-card h2 {
  margin: 28px 0 10px;
  font-size: 1.1rem;
}

.legal-card h2:first-child {
  margin-top: 0;
}

.legal-card h3 {
  margin: 18px 0 8px;
  font-size: 0.98rem;
}

.legal-card p,
.legal-card li {
  color: var(--color-fg-muted);
  line-height: 1.6;
}

.legal-card code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  word-break: break-all;
  color: var(--color-fg);
  background: color-mix(in srgb, var(--color-fg) 6%, transparent);
  padding: 0.1em 0.35em;
  border-radius: 0.35rem;
}

.legal-card ul {
  margin: 0 0 12px;
  padding-left: 18px;
}

/* ——— Responsive ——— */

@media (max-width: 960px) {
  .hero-split,
  .feature-row,
  .feature-row-reverse,
  .trust-grid,
  .step-grid,
  .platform-lanes {
    grid-template-columns: 1fr 1fr;
  }

  .feature-row-reverse .feature-copy,
  .feature-row-reverse .fragment {
    order: initial;
  }

  .step-grid,
  .platform-lanes {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(var(--container), calc(100% - 28px));
  }

  .site-header-sticky {
    align-items: flex-start;
  }

  .nav {
    gap: 12px;
    font-size: 13px;
  }

  .hero-split,
  .feature-row,
  .trust-grid,
  .step-grid,
  .platform-lanes {
    grid-template-columns: 1fr;
  }

  .hero-split {
    gap: 28px;
    padding: 36px 0 56px;
    min-height: 0;
  }

  .section {
    padding: 56px 0;
  }

  .step-grid li,
  .platform-lane,
  .fragment {
    min-height: 0;
  }

  .legal-card,
  .panel {
    padding: 22px;
  }
}