:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-2: #0b1526;
  --surface: rgba(14, 27, 48, 0.82);
  --surface-strong: #111f36;
  --line: rgba(159, 176, 201, 0.22);
  --text: #eef7ff;
  --muted: #9fb0c9;
  --muted-strong: #c5d3e8;
  --cyan: #22d3ee;
  --green: #34d399;
  --purple: #a78bfa;
  --blue: #60a5fa;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --radius-xl: 32px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max: 1180px;
  --pad: clamp(20px, 4vw, 56px);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(34, 211, 238, 0.16), transparent 32rem),
    radial-gradient(circle at 88% 14%, rgba(167, 139, 250, 0.14), transparent 30rem),
    radial-gradient(circle at 50% 84%, rgba(52, 211, 153, 0.10), transparent 34rem),
    linear-gradient(180deg, #07111f 0%, #091426 46%, #07111f 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 70%);
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(34, 211, 238, .86);
  outline-offset: 4px;
}

img { max-width: 100%; display: block; }

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: 999px;
  color: #04111d;
  background: var(--cyan);
  z-index: 10;
}

.skip-link:focus { transform: translateY(0); }

.section-shell {
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin: 18px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 12px 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 17, 31, 0.74);
  backdrop-filter: blur(18px);
  box-shadow: 0 14px 45px rgba(0, 0, 0, .22);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
  font-weight: 780;
  letter-spacing: -0.02em;
}

.brand img { border-radius: 12px; }

nav {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted-strong);
  font-size: 14px;
}

nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
}

nav a:hover { background: rgba(255,255,255,.06); color: var(--text); }

.nav-pill {
  color: #061421;
  background: var(--text);
  font-weight: 760;
}

.nav-pill:hover { background: var(--cyan); color: #061421; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(70px, 10vw, 132px) 0 clamp(48px, 8vw, 96px);
}

.hero-copy { max-width: 680px; }

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .15em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  max-width: 760px;
  font-size: clamp(48px, 7.4vw, 92px);
  line-height: .92;
  letter-spacing: -0.075em;
  text-wrap: balance;
}

.lede {
  margin-bottom: 32px;
  color: var(--muted-strong);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.62;
  text-wrap: pretty;
}

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

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 780;
  border: 1px solid transparent;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

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

.primary {
  color: #051320;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  box-shadow: 0 16px 44px rgba(34, 211, 238, .2);
}

.secondary {
  color: var(--text);
  background: rgba(255,255,255,.05);
  border-color: var(--line);
}

.secondary:hover { background: rgba(255,255,255,.09); border-color: rgba(159,176,201,.4); }

.hero-card {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(255,255,255,.12), rgba(255,255,255,.02));
  box-shadow: var(--shadow);
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(34,211,238,.55), transparent 35%, rgba(167,139,250,.42));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.hero-card img { border-radius: calc(var(--radius-xl) - 10px); }

.hero-card figcaption {
  padding: 12px 8px 4px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding-bottom: clamp(64px, 8vw, 104px);
}

.principles article,
.agent-card,
.model-list a,
.disclosure {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 20px 56px rgba(0,0,0,.16);
}

.principles article {
  min-height: 210px;
  padding: 26px;
  border-radius: var(--radius-lg);
}

.principle-number {
  display: inline-flex;
  margin-bottom: 36px;
  color: var(--muted);
  font: 760 13px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.principles h2,
.section-heading h2,
.split h2 {
  margin-bottom: 14px;
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.principles p,
.section-heading p,
.split p,
.agent-card p,
.model-list span,
.disclosure p {
  color: var(--muted-strong);
  line-height: 1.65;
}

.roster { padding: 12px 0 clamp(64px, 8vw, 108px); }

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(280px, .58fr);
  gap: 32px;
  align-items: end;
  margin-bottom: 26px;
}

.section-heading p:last-child { margin-bottom: 8px; font-size: 18px; }

.agent-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.agent-card {
  min-height: 245px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  grid-column: span 2;
  padding: 26px;
  border-radius: var(--radius-lg);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.agent-card:nth-child(4),
.agent-card:nth-child(5) { grid-column: span 3; }

.agent-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34,211,238,.55);
  background: rgba(18, 34, 59, .92);
}

.agent-role {
  align-self: flex-start;
  margin-bottom: auto;
  padding: 7px 10px;
  border: 1px solid rgba(34,211,238,.28);
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(34,211,238,.08);
  font-size: 13px;
  font-weight: 760;
}

.agent-card h3 {
  margin: 42px 0 10px;
  font-size: 28px;
  letter-spacing: -0.04em;
}

.agent-card p { margin-bottom: 0; }

.split {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(360px, .78fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  padding-bottom: clamp(60px, 8vw, 104px);
}

.split > div:first-child { position: sticky; top: 116px; }

.model-list {
  display: grid;
  gap: 12px;
}

.model-list a {
  display: block;
  padding: 24px;
  border-radius: var(--radius-md);
  transition: transform .18s ease, border-color .18s ease;
}

.model-list a:hover { transform: translateX(4px); border-color: rgba(167,139,250,.5); }

.model-list strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 19px;
}

.model-list span { display: block; }

.disclosure {
  margin-bottom: 42px;
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(34,211,238,.14), transparent 42%),
    rgba(14, 27, 48, 0.82);
}

.disclosure p {
  max-width: 920px;
  margin-bottom: 0;
  font-size: 18px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 0 0 42px;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a { color: var(--muted-strong); }
.footer-links a:hover { color: var(--cyan); }

@media (max-width: 940px) {
  .site-header {
    position: static;
    align-items: flex-start;
    border-radius: 26px;
    flex-direction: column;
  }

  nav { width: 100%; overflow-x: auto; padding-bottom: 2px; }
  nav a { min-width: max-content; }

  .hero,
  .section-heading,
  .split {
    grid-template-columns: 1fr;
  }

  .split > div:first-child { position: static; }
  .principles { grid-template-columns: 1fr; }
  .agent-grid { grid-template-columns: 1fr; }
  .agent-card,
  .agent-card:nth-child(4),
  .agent-card:nth-child(5) { grid-column: auto; }
}

@media (max-width: 560px) {
  :root { --pad: 18px; }
  .brand span { font-size: 15px; }
  nav { font-size: 13px; }
  h1 { font-size: clamp(42px, 15vw, 62px); }
  .button { width: 100%; }
  .hero-card { padding: 6px; border-radius: 24px; }
  .hero-card figcaption { font-size: 12px; }
  .site-footer, .footer-links { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}