:root {
  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --bg-card: #ffffff;
  --ink: #1a1d24;
  --ink-soft: #565d6d;
  --accent: #3b5bdb;
  --accent-dark: #2f49b0;
  --line: #e3e6ec;
  --code-bg: #0f1320;
  --code-ink: #d6dbe8;
  --ok: #41c98a;
  --radius: 12px;
  --maxw: 1000px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  font-size: 0.92em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.1em 0.4em;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- header --------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.site-header nav {
  display: flex;
  align-items: center;
  gap: 22px;
}
.site-header nav a { color: var(--ink-soft); font-weight: 500; }
.site-header nav a:hover { color: var(--ink); text-decoration: none; }
.nav-cta {
  background: var(--ink);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 8px;
}
.nav-cta:hover { background: #000; }

/* --- hero ----------------------------------------------------------- */

.hero { padding: 84px 0 64px; text-align: center; }
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
}
.lede {
  max-width: 620px;
  margin: 22px auto 0;
  font-size: 1.13rem;
  color: var(--ink-soft);
}
.lede code { font-size: 0.88em; }

.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
}
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink-soft); }

.code-card {
  max-width: 620px;
  margin: 48px auto 0;
  background: var(--code-bg);
  border-radius: var(--radius);
  text-align: left;
  box-shadow: 0 18px 40px -22px rgba(15, 19, 32, 0.55);
  overflow: hidden;
}
.code-bar {
  display: flex;
  gap: 7px;
  padding: 13px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.code-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #3a4056;
}
.code-card pre {
  padding: 18px 20px;
  overflow-x: auto;
}
.code-card code {
  background: none;
  border: none;
  padding: 0;
  color: var(--code-ink);
  font-size: 0.88rem;
  line-height: 1.7;
}
.c-prompt { color: #6f7aa8; }
.c-ok { color: var(--ok); font-weight: 700; }
.c-dim { color: #6b7290; }

/* --- stats ---------------------------------------------------------- */

.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px 56px;
  padding: 34px 24px;
}
.stat { text-align: center; }
.stat strong {
  display: block;
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.stat span { color: var(--ink-soft); font-size: 0.95rem; }

/* --- features ------------------------------------------------------- */

.features { padding: 80px 0; }
.features h2,
.how h2,
.closing h2 {
  text-align: center;
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  letter-spacing: -0.02em;
  font-weight: 800;
}
.grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover {
  border-color: #c4cad6;
  transform: translateY(-2px);
}
.card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 9px;
}
.card p { color: var(--ink-soft); font-size: 0.97rem; }

/* --- how it works --------------------------------------------------- */

.how {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 80px 0;
}
.how-lede {
  max-width: 620px;
  margin: 18px auto 0;
  text-align: center;
  color: var(--ink-soft);
  font-size: 1.05rem;
}
.pipeline {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: 40px 0 28px;
}
.node {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 13px 20px;
  font-weight: 600;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95rem;
}
.node-source { border-color: var(--accent); color: var(--accent); }
.node-engine { background: var(--ink); color: #fff; border-color: var(--ink); }
.arrow { color: var(--ink-soft); font-size: 1.3rem; }
.node-outputs {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.node-outputs span {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 6px 14px;
  font-size: 0.88rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.how-note {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* --- closing -------------------------------------------------------- */

.closing { padding: 80px 0; text-align: center; }
.closing p { margin-top: 12px; color: var(--ink-soft); font-size: 1.05rem; }
.closing .cta-row { margin-top: 28px; }

/* --- footer --------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  align-items: center;
  justify-content: space-between;
  padding: 28px 24px;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--ink-soft); }
.disclaimer { flex-basis: 100%; color: #8a90a0; font-size: 0.83rem; }

/* --- responsive ----------------------------------------------------- */

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 44px; }
  .features, .how, .closing { padding: 56px 0; }
  .arrow { transform: rotate(90deg); }
}