/* Instances — public site. Hand-written, no framework, no build step. */

:root {
  --bg: #0b0d11;
  --panel: #12151c;
  --border: #222836;
  --text: #e8eaf0;
  --muted: #939cb0;
  --accent: #7dd3fc;
  --good: #4ade80;
  --warn: #fbbf24;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, sans-serif;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --panel: #f7f8fa;
    --border: #e2e6ee;
    --text: #12141a;
    --muted: #5c6478;
    --accent: #0369a1;
    --good: #15803d;
    --warn: #a16207;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
code { font-family: var(--mono); font-size: 0.9em; }

/* ---------- nav ---------- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.wordmark {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.wordmark span { color: var(--muted); }

.nav nav { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav nav a:hover { color: var(--text); }
.nav nav a.here { color: var(--text); }
.nav nav a.cta {
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
}
.nav nav a.cta:hover { border-color: var(--accent); }

/* ---------- layout ---------- */

main { max-width: 980px; margin: 0 auto; padding: 0 32px 80px; }
main.doc { max-width: 800px; }

section { padding: 64px 0; border-bottom: 1px solid var(--border); }
section:last-child { border-bottom: 0; }

h1 {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  font-weight: 640;
}
h2 {
  font-size: clamp(21px, 3vw, 27px);
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  font-weight: 620;
}
h3 { font-size: 15px; margin: 0 0 8px; font-weight: 620; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--warn);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin: 0 0 18px;
}

.lede { font-size: clamp(16px, 2.2vw, 19px); color: var(--muted); max-width: 68ch; margin: 0 0 28px; }
.lede b { color: var(--text); font-weight: 600; }
.section-lede { color: var(--muted); max-width: 70ch; }

.hero { padding-top: 88px; }
.hero.compact { padding-top: 56px; }

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

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 7px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn.ghost:hover { border-color: var(--accent); }

/* ---------- three columns ---------- */

.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; margin-top: 36px; }
.col p { color: var(--muted); margin: 0; font-size: 15px; }

/* ---------- code ---------- */

.code {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  margin: 0 0 28px;
}
.code .k { color: #c4b5fd; }
.code .s { color: var(--good); }
.code .n { color: var(--warn); }
.code .fn { color: var(--accent); }
@media (prefers-color-scheme: light) {
  .code .k { color: #6d28d9; }
}

/* ---------- metrics ---------- */

.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin: 36px 0 20px; }
.metric { border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px; background: var(--panel); }
.metric .v { font-size: 30px; font-weight: 650; letter-spacing: -0.03em; font-family: var(--mono); }
.metric .v span { font-size: 15px; color: var(--muted); margin-left: 2px; }
.metric .l { font-size: 12px; color: var(--muted); margin-top: 4px; line-height: 1.4; }

.footnote { font-size: 13px; color: var(--muted); max-width: 74ch; margin: 14px 0 0; }
.footnote b { color: var(--text); }

/* ---------- capability claim ---------- */

.claim {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  background: var(--panel);
  padding: 24px 26px;
  margin: 28px 0;
}
.claim-main { font-size: 19px; margin: 0 0 16px; letter-spacing: -0.01em; }
.claim-list { margin: 0; padding-left: 20px; color: var(--muted); }
.claim-list li { margin-bottom: 8px; }
.claim-list b { color: var(--text); }

.caps p { max-width: 72ch; color: var(--muted); }
.caps p b, .caps p em { color: var(--text); }

.caveat {
  border-left: 2px solid var(--warn);
  padding-left: 16px;
  margin-top: 24px;
}

.good { border-left: 2px solid var(--good); padding-left: 16px; }

/* ---------- limitations ---------- */

.limits { list-style: none; counter-reset: lim; padding: 0; margin: 0; }
.limits > li {
  counter-increment: lim;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}
.limits > li::before {
  content: counter(lim);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--warn);
  display: block;
  margin-bottom: 10px;
}
.limits h2 { font-size: 20px; margin-bottom: 12px; }
.limits p { color: var(--muted); max-width: 72ch; }
.limits p b { color: var(--text); }
.limits code { background: var(--panel); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; }

.gates { color: var(--muted); padding-left: 20px; }
.gates li { margin-bottom: 14px; }
.gates b { color: var(--text); }

.closing { padding-top: 44px; }
.closing p { color: var(--muted); max-width: 72ch; }

/* ---------- waitlist ---------- */

.waitlist form { display: flex; gap: 10px; flex-wrap: wrap; margin: 24px 0 10px; max-width: 520px; }
.waitlist input {
  flex: 1 1 260px;
  padding: 11px 14px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 15px;
}
.waitlist input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.waitlist button {
  padding: 11px 24px;
  border-radius: 7px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--bg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.waitlist button:disabled { opacity: 0.55; cursor: default; }

#waitlist-status { font-size: 14px; margin: 4px 0 0; min-height: 1.2em; }
#waitlist-status.ok { color: var(--good); }
#waitlist-status.err { color: var(--warn); }

.fineprint { font-size: 13px; color: var(--muted); max-width: 62ch; }

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

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

footer {
  border-top: 1px solid var(--border);
  padding: 36px 32px 56px;
  max-width: 980px;
  margin: 0 auto;
}
.foot-cols { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; margin-bottom: 20px; }
.foot-nav { display: flex; flex-direction: column; gap: 7px; }
.foot-nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.foot-nav a:hover { color: var(--text); }

@media (max-width: 640px) {
  .nav { padding: 16px 20px; }
  main, footer { padding-left: 20px; padding-right: 20px; }
  section { padding: 44px 0; }
  .hero { padding-top: 52px; }
}