:root {
  --bg: #f5f7fb;
  --ink: #101623;
  --muted: #5d687b;
  --panel: #ffffff;
  --line: #dce4ef;
  --deep: #111827;
  --cyan: #1b8ca1;
  --cyan-dark: #0f6675;
  --green: #56b68b;
  --violet: #6750a4;
  --shadow: 0 24px 70px rgba(16, 22, 35, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 80% 10%, rgba(27, 140, 161, 0.12), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 42%, #eef4f7 100%);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
}

a {
  color: inherit;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(220, 228, 239, 0.82);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  left: 0;
  padding: 16px max(24px, calc((100vw - 1180px) / 2));
  position: sticky;
  right: 0;
  top: 0;
  z-index: 20;
}

.brand,
.nav,
.header-cta,
.button {
  align-items: center;
  display: inline-flex;
}

.brand {
  font-weight: 800;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  background: var(--deep);
  border-radius: 8px;
  color: white;
  display: grid;
  font-family: "JetBrains Mono", monospace;
  height: 36px;
  place-items: center;
  width: 36px;
}

.nav {
  color: var(--muted);
  gap: 24px;
  font-size: 14px;
}

.nav a,
.header-cta {
  text-decoration: none;
}

.header-cta {
  background: var(--deep);
  border-radius: 8px;
  color: white;
  font-weight: 700;
  justify-self: end;
  min-height: 38px;
  padding: 0 16px;
}

main {
  margin: 0 auto;
  max-width: 1180px;
  padding: 34px 24px 80px;
}

.hero {
  align-items: center;
  display: grid;
  gap: 42px;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, 0.98fr);
  min-height: calc(100vh - 94px);
  padding: 28px 0 48px;
}

.eyebrow {
  color: var(--cyan-dark);
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 14px;
}

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

h1 {
  font-size: 72px;
  letter-spacing: 0;
  line-height: 0.96;
  margin-bottom: 22px;
}

h2 {
  font-size: 42px;
  letter-spacing: 0;
  line-height: 1.08;
  margin-bottom: 14px;
}

h3 {
  font-size: 20px;
  line-height: 1.25;
  margin-bottom: 8px;
}

.hero-lede {
  color: #253149;
  font-size: 24px;
  font-weight: 650;
  line-height: 1.34;
}

.hero-body,
.section-heading p,
.summary-grid p,
.capability-grid p,
.timeline p,
.roadmap-grid p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
}

.button {
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  text-decoration: none;
}

.button.primary {
  background: var(--cyan);
  color: white;
  box-shadow: 0 12px 26px rgba(27, 140, 161, 0.28);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  color: var(--deep);
}

.signal-strip {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, 1fr);
  margin: 34px 0 0;
}

.signal-strip div {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.signal-strip dt {
  font-weight: 800;
}

.signal-strip dd {
  color: var(--muted);
  font-size: 13px;
  margin: 4px 0 0;
}

.hero-visual {
  background:
    linear-gradient(145deg, rgba(17, 24, 39, 0.96), rgba(15, 102, 117, 0.92)),
    #111827;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-height: 560px;
  overflow: hidden;
  position: relative;
}

#systemsCanvas {
  display: block;
  height: 100%;
  min-height: 560px;
  width: 100%;
}

.visual-glass {
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  bottom: 22px;
  color: white;
  left: 22px;
  padding: 16px;
  position: absolute;
}

.visual-glass span {
  color: rgba(255, 255, 255, 0.68);
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  margin-bottom: 6px;
}

section {
  padding: 84px 0;
}

.section-heading {
  max-width: 760px;
}

.chat-panel,
.contact {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 34px;
}

.chat-shell {
  display: grid;
  gap: 16px;
}

.suggestions,
.capability-grid,
.roadmap-grid {
  display: grid;
  gap: 14px;
}

.suggestions {
  grid-template-columns: repeat(4, 1fr);
}

.suggestions button {
  background: #f1f6f8;
  border: 1px solid #d4e2e7;
  border-radius: 8px;
  color: #244254;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  min-height: 46px;
}

.messages {
  background: #f8fbfc;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 12px;
  max-height: 420px;
  min-height: 240px;
  overflow: auto;
  padding: 16px;
}

.message {
  border-radius: 8px;
  max-width: 86%;
  padding: 13px 15px;
}

.message p {
  line-height: 1.6;
  margin: 0;
}

.message.assistant {
  background: white;
  border: 1px solid var(--line);
}

.message.user {
  background: var(--deep);
  color: white;
  justify-self: end;
}

.chat-form {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr auto;
}

.chat-form input {
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  min-height: 48px;
  padding: 0 14px;
}

.chat-note {
  color: var(--muted);
  font-size: 13px;
  margin: 0;
}

.summary-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(2, 1fr);
}

.capability-grid {
  grid-template-columns: repeat(3, 1fr);
}

.capability-grid article,
.roadmap-grid article {
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.capability-grid span,
.roadmap-grid strong {
  color: var(--deep);
  display: block;
  font-size: 18px;
  font-weight: 850;
  margin-bottom: 8px;
}

.timeline {
  border-left: 1px solid var(--line);
  display: grid;
  gap: 24px;
  margin-left: 8px;
}

.timeline article {
  display: grid;
  gap: 22px;
  grid-template-columns: 128px 1fr;
  padding-left: 24px;
  position: relative;
}

.timeline article::before {
  background: var(--cyan);
  border: 4px solid #dff4f7;
  border-radius: 99px;
  content: "";
  height: 14px;
  left: -8px;
  position: absolute;
  top: 4px;
  width: 14px;
}

.timeline time {
  color: var(--cyan-dark);
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  font-weight: 800;
}

.roadmap-grid {
  grid-template-columns: repeat(3, 1fr);
}

.contact {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

.contact .cta-row {
  margin: 0;
}

.sr-only {
  clip: rect(0, 0, 0, 0);
  border: 0;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  h1 {
    font-size: 54px;
  }

  .hero-visual,
  #systemsCanvas {
    min-height: 420px;
  }

  .suggestions,
  .capability-grid,
  .roadmap-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .contact {
    align-items: flex-start;
    display: grid;
    gap: 18px;
  }
}

@media (max-width: 560px) {
  main {
    padding: 24px 16px 64px;
  }

  .site-header {
    padding: 12px 16px;
  }

  .header-cta {
    display: none;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 32px;
  }

  .signal-strip,
  .chat-form,
  .timeline article {
    grid-template-columns: 1fr;
  }

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