:root {
  color-scheme: light dark;
  --page: #f6f8fc;
  --surface: #ffffff;
  --ink: #15213a;
  --muted: #5e6879;
  --line: #dce2ec;
  --purple: #6554d9;
  --purple-dark: #4d3fba;
  --purple-soft: #ece9ff;
  --mint: #dff8ec;
  --mint-ink: #176044;
  --night: #172038;
  --code: #0e1528;
  --code-ink: #eef2ff;
  --max: 70rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --display: "Avenir Next Condensed", "Arial Narrow", ui-sans-serif, system-ui, sans-serif;
  --body: "Avenir Next", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0f1628;
    --surface: #172038;
    --ink: #f4f6fc;
    --muted: #aab4c8;
    --line: #303b55;
    --purple: #a99dff;
    --purple-dark: #c1b8ff;
    --purple-soft: #292650;
    --mint: #173f36;
    --mint-ink: #a7efd4;
    --night: #090e1b;
    --code: #070b15;
    --code-ink: #f4f6fc;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--purple-dark);
}

:focus-visible {
  outline: 3px solid var(--purple);
  outline-offset: 3px;
  border-radius: 0.2rem;
}

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

h1,
h2,
h3 {
  font-family: var(--display);
  line-height: 1.03;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 9ch;
  margin-bottom: 0.25rem;
  font-size: clamp(3.8rem, 9vw, 7rem);
  font-weight: 750;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2.25rem, 5vw, 3.7rem);
  font-weight: 720;
}

h3 {
  margin-bottom: 0.55rem;
  font-size: 1.55rem;
}

code,
pre {
  font-family: var(--mono);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: -9999px;
  padding: 0.6rem 0.9rem;
  background: var(--surface);
  border: 2px solid var(--purple);
}

.skip-link:focus {
  left: 0.75rem;
}

.site-header,
main > section,
footer {
  width: min(calc(100% - (2 * var(--gutter))), var(--max));
  margin-inline: auto;
}

.site-header {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  text-decoration: none;
}

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

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 0.5rem;
  background: var(--purple);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: -0.05em;
}

.site-header nav,
footer nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.92rem;
  font-weight: 650;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(19rem, 0.98fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: center;
  padding-block: clamp(4.5rem, 10vw, 8rem);
}

.kicker {
  margin-bottom: 0.85rem;
  color: var(--purple-dark);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-title-2 {
  margin-bottom: 1.5rem;
  color: var(--purple-dark);
  font-family: var(--display);
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  font-weight: 650;
}

.hero-summary {
  max-width: 35rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.27rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.1rem;
}

.button {
  display: inline-block;
  padding: 0.78rem 1.1rem;
  border-radius: 0.65rem;
  background: var(--purple);
  color: #fff;
  font-weight: 750;
  text-decoration: none;
}

.button:hover {
  background: var(--purple-dark);
  color: #fff;
}

.text-link {
  color: var(--purple-dark);
  font-weight: 700;
}

.memory-demo {
  position: relative;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--surface);
  box-shadow: 0.75rem 0.75rem 0 var(--purple-soft);
}

.memory-demo::before {
  content: "memory, returned";
  position: absolute;
  top: -0.78rem;
  right: 1rem;
  padding: 0.26rem 0.58rem;
  border-radius: 99rem;
  background: var(--mint);
  color: var(--mint-ink);
  font-family: var(--mono);
  font-size: 0.69rem;
  font-weight: 750;
}

.you-said {
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.you-said span {
  margin-right: 0.4rem;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 750;
  text-transform: uppercase;
}

.agent-reply {
  padding: 1rem 1.05rem;
  border-radius: 0.65rem;
  background: var(--page);
  font-family: var(--mono);
  font-size: 0.84rem;
}

.reply-item {
  margin: 0;
  padding: 0.38rem 0 0;
}

.reply-item span {
  display: inline-block;
  width: 3.3rem;
  color: var(--purple-dark);
  font-weight: 750;
}

.reply-provenance {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.12rem 0.38rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.reply-reason {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.reply-link {
  margin: 0.7rem 0 0;
  color: var(--purple-dark);
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.demo-rule {
  margin: 0.9rem 0 0;
  color: var(--mint-ink);
  font-size: 0.86rem;
  font-weight: 750;
  text-align: right;
}

.core,
.install {
  padding-block: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 45rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-block: 1px solid var(--line);
}

.feature-grid article {
  padding: 2rem clamp(1rem, 2.5vw, 1.75rem) 2.2rem;
  border-right: 1px solid var(--line);
}

.feature-grid article:first-child {
  padding-left: 0;
}

.feature-grid article:last-child {
  padding-right: 0;
  border-right: 0;
}

.feature-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.feature-symbol {
  display: grid;
  width: 2rem;
  height: 2rem;
  margin-bottom: 1.4rem;
  place-items: center;
  border-radius: 50%;
  background: var(--purple-soft);
  color: var(--purple-dark);
  font-family: var(--mono);
  font-weight: 800;
}

.install {
  display: grid;
  grid-template-columns: minmax(15rem, 0.7fr) minmax(25rem, 1.3fr);
  column-gap: clamp(2rem, 7vw, 6rem);
  row-gap: 1.25rem;
  align-items: center;
}

.install-copy p:not(.kicker) {
  max-width: 31rem;
  color: var(--muted);
}

.small {
  font-size: 0.88rem;
}

.small code {
  color: var(--ink);
}

.code-block {
  position: relative;
  overflow: hidden;
  border-radius: 0.85rem;
  background: var(--code);
  color: var(--code-ink);
}

.code-block pre {
  overflow-x: auto;
  margin: 0;
  padding: 1.5rem 1.35rem;
  font-size: 0.84rem;
  line-height: 1.8;
}

.copy-button {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  padding: 0.42rem 0.68rem;
  border: 1px solid #3b4761;
  border-radius: 0.45rem;
  background: #17213a;
  color: #f4f6fc;
  font: 700 0.72rem var(--body);
  cursor: pointer;
}

.copy-button:hover {
  border-color: #a99dff;
}

.install-links {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.install-links a {
  color: var(--purple-dark);
  font-size: 0.9rem;
  font-weight: 700;
}

footer {
  min-height: 6.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

footer p {
  margin: 0;
}

.copy-status {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 50;
  min-width: 10rem;
  padding: 0.65rem 0.85rem;
  border-radius: 0.6rem;
  background: var(--night);
  color: #fff;
  font-size: 0.82rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition: opacity 150ms ease, transform 150ms ease;
}

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

@media (max-width: 850px) {
  .hero,
  .install {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 3.5rem;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-grid article {
    border-bottom: 1px solid var(--line);
  }

  .feature-grid article:nth-child(2) {
    border-right: 0;
  }

  .feature-grid article:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .feature-grid article:first-child,
  .feature-grid article:nth-child(3) {
    padding-left: 0;
  }

  .feature-grid article:nth-child(2),
  .feature-grid article:last-child {
    padding-right: 0;
  }

  .install-links {
    grid-column: auto;
  }

}

@media (max-width: 570px) {
  .site-header {
    min-height: 4rem;
  }

  .site-header nav a:first-child {
    display: none;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    padding-block: 3.8rem 5rem;
  }

  h1 {
    font-size: clamp(3.4rem, 19vw, 5rem);
  }

  .memory-demo {
    box-shadow: 0.45rem 0.45rem 0 var(--purple-soft);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid article,
  .feature-grid article:first-child,
  .feature-grid article:nth-child(2),
  .feature-grid article:nth-child(3),
  .feature-grid article:last-child {
    padding: 1.65rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .feature-grid article:last-child {
    border-bottom: 0;
  }

  .code-block pre {
    padding-top: 3.4rem;
    font-size: 0.76rem;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
  }
}