:root {
  color-scheme: dark;
  --ink: #f6fbff;
  --muted: #aebdcc;
  --line: rgba(255, 255, 255, 0.16);
  --surface: #111820;
  --surface-strong: #17232d;
  --cyan: #32d5c8;
  --cyan-dark: #0e8c84;
  --amber: #f1aa3f;
  --green: #8de58c;
  --charcoal: #081014;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.42);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--charcoal);
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 56px);
  background: rgba(8, 16, 20, 0.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand,
.nav-links,
.button,
.command-title,
.footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  width: 18px;
  aspect-ratio: 1;
  border: 2px solid var(--cyan);
  border-radius: 5px;
  box-shadow: inset 0 0 0 4px rgba(50, 213, 200, 0.18);
}

.nav-links {
  gap: clamp(14px, 3vw, 34px);
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
}

.hero {
  min-height: 86vh;
  display: grid;
  align-items: center;
  padding: 120px clamp(20px, 6vw, 76px) 72px;
  background:
    linear-gradient(90deg, rgba(8, 16, 20, 0.96) 0%, rgba(8, 16, 20, 0.75) 42%, rgba(8, 16, 20, 0.34) 100%),
    linear-gradient(0deg, rgba(8, 16, 20, 0.96), rgba(8, 16, 20, 0.1) 38%),
    url("assets/hero-agent-memory.png") center right / cover no-repeat;
}

.hero-content {
  width: min(700px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 20px;
  font-size: 6.25rem;
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  max-width: 800px;
  margin-bottom: 0;
  font-size: 3.65rem;
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
}

.hero-copy {
  max-width: 660px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 1.25rem;
  line-height: 1.58;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 46px;
  justify-content: center;
  gap: 10px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.button svg,
.copy-button svg,
.feature-card svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.primary {
  color: #061112;
  background: var(--cyan);
  border-color: transparent;
}

.secondary {
  background: rgba(255, 255, 255, 0.08);
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
  background: #0c151a;
}

.signal-strip div {
  min-height: 118px;
  padding: 28px clamp(20px, 4vw, 52px);
  border-right: 1px solid var(--line);
}

.signal-strip div:last-child {
  border-right: 0;
}

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

.signal-strip strong {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 1.08rem;
}

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

.section {
  padding: clamp(64px, 10vw, 116px) clamp(20px, 6vw, 76px);
}

.section-heading {
  margin-bottom: 34px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.command-block,
.memory-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  box-shadow: var(--shadow);
}

.feature-card {
  min-height: 230px;
  padding: 26px;
}

.feature-card svg {
  width: 26px;
  height: 26px;
  margin-bottom: 28px;
  color: var(--cyan);
}

.feature-card p,
.repo-copy p {
  color: var(--muted);
  line-height: 1.65;
}

.setup-band {
  background: #0f171b;
  border-block: 1px solid var(--line);
}

.command-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.command-block {
  overflow: hidden;
  background: var(--surface);
}

.command-title {
  justify-content: space-between;
  min-height: 56px;
  gap: 16px;
  padding: 0 16px 0 18px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-weight: 800;
}

.copy-button {
  width: 36px;
  aspect-ratio: 1;
  display: inline-grid;
  place-items: center;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.copy-button:hover,
.copy-button:focus-visible {
  color: var(--ink);
  border-color: var(--cyan);
}

.copy-button.copied {
  color: #061112;
  background: var(--green);
  border-color: transparent;
}

pre {
  min-height: 126px;
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  color: #d9f7f2;
  background: #0b1014;
  font-size: 0.92rem;
  line-height: 1.6;
}

code {
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

.demo-section {
  background:
    linear-gradient(180deg, rgba(50, 213, 200, 0.08), transparent 58%),
    #081014;
}

.memory-demo {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: stretch;
}

.chat-lines {
  display: grid;
  gap: 12px;
}

.chat-lines p {
  margin: 0;
  padding: 18px 20px;
  border-left: 3px solid var(--cyan);
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  line-height: 1.55;
}

.chat-lines span {
  display: inline-block;
  min-width: 72px;
  color: var(--ink);
  font-weight: 800;
}

.memory-panel {
  padding: 28px;
  background: var(--surface-strong);
}

.panel-label {
  margin-bottom: 20px;
  color: var(--amber);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.memory-panel p:last-child {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1.45;
}

.repo-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.repo-copy {
  max-width: 780px;
}

.repo-button {
  flex: none;
}

.footer {
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 76px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #070d10;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero {
    min-height: 82vh;
    background-position: center;
  }

  h1 {
    font-size: 4.75rem;
  }

  h2 {
    font-size: 3rem;
  }

  .signal-strip,
  .feature-grid,
  .command-layout,
  .memory-demo {
    grid-template-columns: 1fr;
  }

  .signal-strip div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .signal-strip div:last-child {
    border-bottom: 0;
  }

  .repo-section,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .repo-button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding-inline: 16px;
  }

  .hero,
  .section {
    padding-inline: 16px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  h1 {
    font-size: 3.2rem;
  }

  h2 {
    font-size: 2.1rem;
  }

  pre {
    font-size: 0.84rem;
  }
}