:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --ink: #111827;
  --muted: #5b6472;
  --line: #d8dee8;
  --brand: #0f766e;
  --brand-dark: #134e4a;
  --accent: #f59e0b;
  --deep: #101828;
  --soft: #e8f3f1;
  --shadow: 0 24px 70px rgba(16, 24, 40, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 6vw;
  background: rgba(245, 247, 251, 0.92);
  border-bottom: 1px solid rgba(216, 222, 232, 0.8);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  color: var(--deep);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  color: #fff;
  background: var(--brand-dark);
  font-size: 13px;
}

.nav-links {
  gap: 28px;
  color: var(--muted);
  font-weight: 600;
}

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

.nav-cta,
.button {
  border-radius: 8px;
  font-weight: 700;
}

.nav-cta {
  padding: 10px 16px;
  color: #fff;
  background: var(--deep);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1fr);
  gap: 60px;
  align-items: center;
  min-height: calc(100vh - 73px);
  padding: 88px 6vw 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  color: var(--deep);
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  color: var(--deep);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.04;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  color: var(--deep);
  font-size: 22px;
  line-height: 1.2;
}

p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.hero-copy {
  max-width: 670px;
  font-size: 21px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 20px;
}

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

.button.secondary {
  color: var(--brand-dark);
  background: var(--soft);
  border: 1px solid #b9d7d2;
}

.hero-visual {
  padding: 26px;
  border-radius: 24px;
  background:
    radial-gradient(circle at 25% 15%, rgba(245, 158, 11, 0.2), transparent 30%),
    linear-gradient(135deg, #173d3a 0%, #111827 74%);
  box-shadow: var(--shadow);
}

.assistant-window {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  background: #f8fafc;
}

.window-top {
  display: flex;
  gap: 7px;
  padding: 14px;
  background: #111827;
}

.window-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d1d5db;
}

.assistant-body {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  min-height: 430px;
}

.source-panel,
.chat-panel {
  padding: 22px;
}

.source-panel {
  border-right: 1px solid var(--line);
  background: #eef2f7;
}

.panel-title,
.demo-label {
  margin-bottom: 18px;
  color: #334155;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.doc-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  padding: 13px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: #475569;
  background: #fff;
  font-size: 14px;
  font-weight: 700;
}

.doc-row span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #94a3b8;
}

.doc-row.active {
  color: var(--brand-dark);
  border-color: #99d3cb;
  background: #e3f5f2;
}

.doc-row.active span {
  background: var(--brand);
}

.message {
  max-width: 92%;
  margin-bottom: 16px;
  padding: 15px 16px;
  border-radius: 8px;
  font-size: 15px;
  line-height: 1.55;
}

.message.user {
  margin-left: auto;
  color: #fff;
  background: var(--brand-dark);
}

.message.bot {
  color: #263242;
  background: #eef2f7;
}

.references {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.references span {
  padding: 8px 10px;
  border-radius: 999px;
  color: var(--brand-dark);
  background: var(--soft);
  font-size: 13px;
  font-weight: 800;
}

.trust-strip,
.section {
  margin: 0 6vw;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--line);
}

.trust-strip div {
  padding: 26px;
  background: var(--surface);
}

.trust-strip strong,
.trust-strip span {
  display: block;
}

.trust-strip strong {
  margin-bottom: 8px;
  color: var(--deep);
}

.trust-strip span {
  color: var(--muted);
}

.section {
  padding: 96px 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 38px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.service-card,
.demo-card,
.founder-section,
.contact-section {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.service-card {
  padding: 26px;
}

.card-icon {
  display: inline-flex;
  margin-bottom: 26px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.service-card p,
.demo-card p {
  font-size: 15px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.65fr);
  gap: 42px;
  align-items: start;
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  color: #344054;
  line-height: 1.55;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  color: #fff;
  background: var(--brand);
  content: "✓";
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
}

.demo-card {
  padding: 34px;
  box-shadow: 0 16px 38px rgba(16, 24, 40, 0.08);
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.use-case-grid div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #344054;
  background: var(--surface);
  font-weight: 700;
}

.founder-section,
.contact-section {
  padding: 48px;
}

.founder-section {
  background:
    linear-gradient(90deg, rgba(232, 243, 241, 0.92), rgba(255, 255, 255, 0.95)),
    var(--surface);
}

.founder-section p {
  max-width: 900px;
}

.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 70px;
  color: #fff;
  background: var(--deep);
}

.contact-section h2,
.contact-section p {
  color: #fff;
}

.contact-section p {
  max-width: 720px;
  opacity: 0.78;
}

.site-footer {
  justify-content: space-between;
  gap: 18px;
  padding: 26px 6vw;
  color: #667085;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

@media (max-width: 1080px) {
  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    padding-top: 54px;
  }

  h1 {
    font-size: 46px;
  }

  .hero-copy {
    font-size: 18px;
  }

  .hero-visual {
    padding: 14px;
  }

  .assistant-body,
  .trust-strip,
  .cards-grid,
  .use-case-grid {
    grid-template-columns: 1fr;
  }

  .source-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .contact-section {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}