:root {
  --bg: #f7f4ee; --surface: #ffffff; --ink: #1d1f22; --ink-2: #565b62; --line: #e4dfd3;
  --brand: #1f4d45; --brand-ink: #ffffff; --accent: #e8a33d; --accent-soft: #fbefd9; --band: #eef2ef;
  --bubble-in: #ffffff; --bubble-out: #dff3e4; --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121514; --surface: #1b1f1d; --ink: #edf0ee; --ink-2: #a4aba7; --line: #2c312f;
    --brand: #7fc2b1; --brand-ink: #0e1a17; --accent: #f0b85a; --accent-soft: #3a2f1c; --band: #18201d;
    --bubble-in: #232826; --bubble-out: #1f3a2c;
  }
}
:root[data-theme="dark"] {
  --bg: #121514; --surface: #1b1f1d; --ink: #edf0ee; --ink-2: #a4aba7; --line: #2c312f;
  --brand: #7fc2b1; --brand-ink: #0e1a17; --accent: #f0b85a; --accent-soft: #3a2f1c; --band: #18201d;
  --bubble-in: #232826; --bubble-out: #1f3a2c;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--brand); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.top { position: sticky; top: 0; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); z-index: 2; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 750; font-size: 19px; color: var(--ink); text-decoration: none; }
.owl { width: 30px; height: 30px; }
nav { display: flex; align-items: center; gap: 18px; font-size: 15px; }
nav a { color: var(--ink-2); text-decoration: none; } nav a:hover { color: var(--ink); }
@media (max-width: 640px) { nav a:not(.btn) { display: none; } }
.btn { display: inline-block; background: var(--brand); color: var(--brand-ink) !important; padding: 13px 20px; border-radius: 12px; font-weight: 650; text-decoration: none; }
.btn.small { padding: 8px 14px; font-size: 14px; }
.btn.ghost { background: transparent; color: var(--ink) !important; border: 1px solid var(--line); }
.hero { padding: 56px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; gap: 32px; } }
.eyebrow { color: var(--ink-2); font-weight: 600; font-size: 14px; letter-spacing: .02em; margin: 0 0 10px; }
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.08; margin: 0 0 18px; letter-spacing: -.02em; }
h1 span { color: var(--brand); }
.lede { font-size: 19px; color: var(--ink-2); margin: 0 0 24px; max-width: 34em; }
.cta { display: flex; gap: 10px; flex-wrap: wrap; }
.note { font-size: 14px; color: var(--ink-2); margin-top: 14px; }
.chat { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: 18px; display: flex; flex-direction: column; gap: 8px; box-shadow: 0 10px 40px rgba(0,0,0,.06); }
.bubble { max-width: 88%; padding: 9px 12px; border-radius: 14px; font-size: 15px; line-height: 1.4; }
.bubble.out { background: var(--bubble-out); align-self: flex-start; border-bottom-left-radius: 4px; }
.bubble.in { background: var(--bubble-in); border: 1px solid var(--line); align-self: flex-end; border-bottom-right-radius: 4px; }
.bubble.sys { align-self: center; font-size: 12px; color: var(--ink-2); background: transparent; padding: 2px; }
.bubble.card { align-self: stretch; max-width: 100%; background: var(--accent-soft); font-size: 14px; }
.opts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.opts b { font-weight: 600; font-size: 13px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px; }
.caption { font-size: 12px; color: var(--ink-2); margin: 4px 0 0; text-align: center; }
section h2 { font-size: clamp(26px, 3.4vw, 34px); margin: 0 0 20px; letter-spacing: -.01em; }
#how { padding: 48px 16px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; counter-reset: s; }
.steps li { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px; counter-increment: s; }
.steps li::before { content: counter(s); display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--accent-soft); font-weight: 700; font-size: 14px; margin-bottom: 8px; }
.steps h3 { margin: 0 0 6px; font-size: 17px; }
.steps p { margin: 0; font-size: 15px; color: var(--ink-2); }
.band { background: var(--band); padding: 48px 0; }
.rules { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px 28px; }
.rules li { padding-left: 26px; position: relative; font-size: 16px; color: var(--ink-2); }
.rules li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 800; }
.rules b { color: var(--ink); }
.pilot { padding: 56px 16px; text-align: center; }
.pilot p { color: var(--ink-2); max-width: 36em; margin: 0 auto 18px; }
.foot { border-top: 1px solid var(--line); padding: 28px 0; font-size: 14px; color: var(--ink-2); }
.small { font-size: 12px; color: var(--ink-2); }
.prose { max-width: 760px; padding-top: 32px; padding-bottom: 48px; }
.prose h1 { font-size: 36px; } .prose h2 { font-size: 22px; margin: 30px 0 8px; }
.prose li { margin: 6px 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }