@import url("https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap");
/* Murmur brand system. Palette from f7931a.family: dark, iOS-like, one accent (bitcoin orange #F7931A).
   Dark is the default; light is the secondary option (data-theme="light"). */
:root, :root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000; --bg-2: #1c1c1e; --surface: #1c1c1e; --surface-2: #2c2c2e; --surface-3: #3a3a3c;
  --hover: #252527;
  --fill: rgba(118,118,128,.24); --fill-2: rgba(120,120,128,.36);
  --border: #38383a;          /* 1px hairlines */
  --border-strong: rgba(84,84,88,.6);
  --material: rgba(22,22,24,.72); /* translucent bars (with backdrop blur) */
  --text: #ffffff; --muted: rgba(235,235,245,.62); --muted-2: rgba(235,235,245,.4);
  --accent: #f7931a;          /* fills, buttons, marks */
  --accent-text: #f7931a;     /* orange text and links (fine on black) */
  --accent-hover: #ffa53d;
  --on-accent: #000000;
  --accent-soft: rgba(247,147,26,.16);
  --green: #30d158; --green-soft: rgba(48,209,88,.16);
  --red: #ff453a; --red-soft: rgba(255,69,58,.16);
  --warn: #ffa53d;
  --code-bg: #1c1c1e; --chat-bg: #1c1c1e; --bubble: #2c2c2e; --bubble-me: rgba(247,147,26,.16);
  --shadow: none;
  --radius: 10px; --radius-lg: 16px; --radius-sm: 7px; --maxw: 1120px;
  --font: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff; --bg-2: #f6f6f4; --surface: #ffffff; --surface-2: #f6f6f4; --surface-3: #ecebe8;
  --hover: #f6f6f4;
  --fill: rgba(118,118,128,.12); --fill-2: rgba(120,120,128,.2);
  --border: #e7e5e1; --border-strong: #d6d3cd;
  --material: rgba(255,255,255,.72);
  --text: #111111; --muted: #5f5f5a; --muted-2: #8a8a83;
  --accent: #f7931a;          /* fills, buttons, marks */
  --accent-text: #b45309;     /* orange text and links on white */
  --accent-hover: #e8850f;
  --on-accent: #000000;
  --accent-soft: rgba(247,147,26,.12);
  --green: #15803d; --green-soft: rgba(21,128,61,.1);
  --red: #dc2626; --red-soft: rgba(220,38,38,.1);
  --warn: #b45309;
  --code-bg: #f6f6f4; --chat-bg: #f6f6f4; --bubble: #ffffff; --bubble-me: #fef3e2;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; display: block; }
code, pre, .mono { font-family: var(--mono); font-size: 0.88em; }
code { background: var(--code-bg); border: 1px solid var(--border); border-radius: 6px; padding: 0.1em 0.4em; }
pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; overflow-x: auto; line-height: 1.5;
}
pre code { background: none; border: 0; padding: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 750; }
h3 { font-size: 1.12rem; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(160%) blur(12px);
  background: var(--material);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 750; color: var(--text); letter-spacing: -0.02em; font-size: 1.08rem; }
.brand:hover { text-decoration: none; }
.brand svg { width: 28px; height: 28px; }
.nav-links { display: none; gap: 22px; margin-left: 12px; }
.nav-links a { color: var(--muted); font-size: 0.94rem; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); text-decoration: none; }
.nav-cta { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.theme-toggle {
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  width: 36px; height: 36px; border-radius: 10px; cursor: pointer; display: grid; place-items: center;
}
.theme-toggle:hover { color: var(--text); background: var(--hover); }
@media (min-width: 1040px) { .nav-links { display: flex; } }
@media (max-width: 520px) { .nav-cta .btn-ghost { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  height: 44px; padding: 0 18px; border-radius: 11px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--hover); }
.btn-ghost:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }
.btn-sm { height: 36px; padding: 0 14px; font-size: 0.9rem; border-radius: 10px; }
.btn svg { width: 18px; height: 18px; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 64px 0 72px; overflow: hidden; }
.hero-grid { display: grid; gap: 48px; align-items: center; }
@media (min-width: 980px) { .hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: 56px; } .hero { padding: 88px 0 96px; } }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 0.82rem; font-weight: 600;
  color: var(--accent-text); background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 20px;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.lede { font-size: clamp(1.06rem, 1.6vw, 1.22rem); color: var(--muted); max-width: 560px; margin-bottom: 28px; }
.hero h1 .grad { color: var(--accent-text); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--muted); font-size: 0.9rem; }
.trust-row span { display: inline-flex; align-items: center; gap: 6px; }
.trust-row svg { width: 16px; height: 16px; color: var(--accent); }

/* ---------- chat mock ---------- */
.chat {
  background: var(--chat-bg); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow); overflow: hidden; max-width: 520px; width: 100%; justify-self: center;
}
.chat-head {
  display: flex; align-items: center; gap: 10px; padding: 12px 16px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.chat-avatar { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 0.85rem; }
.chat-title { font-weight: 650; font-size: 0.95rem; line-height: 1.2; }
.chat-sub { color: var(--muted); font-size: 0.78rem; }
.chat-body { padding: 16px 14px 18px; display: flex; flex-direction: column; gap: 10px; min-height: 430px; }
.msg {
  max-width: 88%; padding: 9px 12px 8px; border-radius: 14px; font-size: 0.88rem; line-height: 1.45;
  background: var(--bubble); border: 1px solid var(--border);
  opacity: 0; transform: translateY(6px); animation: pop 0.45s ease forwards;
}
.msg.me { align-self: flex-end; background: var(--bubble-me); border-color: transparent; border-bottom-right-radius: 4px; }
.msg.bot { border-bottom-left-radius: 4px; }
.msg .who { font-size: 0.74rem; font-weight: 600; color: var(--accent-text); margin-bottom: 2px; }
.msg.me .who { color: var(--text); }
.msg code { font-size: 0.82em; }
.msg .btns { display: flex; gap: 6px; margin-top: 8px; }
.msg .btns span {
  flex: 1; text-align: center; font-size: 0.78rem; font-weight: 600; padding: 6px 4px; border-radius: 8px;
  background: var(--accent-soft); color: var(--accent-text);
}
.msg .btns span.on { background: var(--accent); color: var(--on-accent); }
.msg .files { color: var(--muted); font-size: 0.78rem; margin-top: 4px; }
@keyframes pop { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .msg { animation: none; opacity: 1; transform: none; } }

/* ---------- sections ---------- */
section { padding: 84px 0; }
section.alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--accent-text); margin-bottom: 12px; }
.section-head p { color: var(--muted); font-size: 1.08rem; }

.grid { display: grid; gap: 18px; }
@media (min-width: 720px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 980px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 720px) and (max-width: 979px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
}
.card p { color: var(--muted); margin: 0; font-size: 0.95rem; }
.card .ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; margin-bottom: 14px;
  background: var(--accent-soft); color: var(--accent-text);
}
.card .ico svg { width: 21px; height: 21px; }
.card.quote { font-size: 1.02rem; }
.card.quote p { color: var(--text); }

/* steps */
.steps { counter-reset: s; display: grid; gap: 14px; }
@media (min-width: 900px) { .steps { grid-template-columns: repeat(5, 1fr); } }
.step { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 18px; }
.step::before {
  counter-increment: s; content: counter(s);
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; margin-bottom: 12px;
  background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 0.9rem;
}
.step p { color: var(--muted); font-size: 0.92rem; margin: 0; }
.step h3 { font-size: 1rem; }

/* architecture */
.arch { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px; overflow-x: auto; }
.arch svg { min-width: 760px; width: 100%; height: auto; }
.arch text { font-family: var(--font); }

/* security layers */
.layers { display: grid; gap: 12px; }
.layer { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.layer .n { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-weight: 750; background: var(--accent-soft); color: var(--accent-text); }
.layer p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.layer h3 { margin-bottom: 4px; }

/* table */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 0.94rem; min-width: 560px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 650; background: var(--bg-2); }
tr:last-child td { border-bottom: 0; }
.yes { color: var(--warn); font-weight: 600; }
.no { color: var(--green); font-weight: 600; }

/* agents */
.agents { display: flex; flex-wrap: wrap; gap: 12px; }
.agent-pill {
  display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border); font-weight: 600;
}
.agent-pill .sw { width: 10px; height: 10px; border-radius: 3px; }

/* bounty flow */
.flow { display: grid; gap: 10px; }
@media (min-width: 900px) { .flow { grid-template-columns: repeat(4, 1fr); } }
.flow .card { position: relative; }
.flow .tag { display: inline-block; font-size: 0.74rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; margin-bottom: 10px; background: var(--accent-soft); color: var(--accent-text); }

.callout {
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border)); background: var(--accent-soft);
  border-radius: var(--radius); padding: 16px 18px; color: var(--text); font-size: 0.95rem;
}
.callout.muted { background: var(--surface); border-color: var(--border); color: var(--muted); }

/* faq */
details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0 18px; }
details + details { margin-top: 10px; }
summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--muted); font-weight: 500; font-size: 1.2rem; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { color: var(--muted); margin: 0 0 16px; }

/* final cta */
.final { text-align: center; padding: 96px 0; }
.final .cta-row { justify-content: center; }
.final p { color: var(--muted); font-size: 1.1rem; max-width: 560px; margin: 0 auto 28px; }

/* footer */
footer { border-top: 1px solid var(--border); padding: 36px 0 44px; color: var(--muted); font-size: 0.9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
footer a { color: var(--muted); }

/* docs pages */
.page { padding: 56px 0 80px; }
.page-head { max-width: 760px; margin-bottom: 36px; }
.page-head p { color: var(--muted); font-size: 1.1rem; }
.doc { display: grid; gap: 40px; }
@media (min-width: 980px) { .doc { grid-template-columns: 220px 1fr; } }
.toc { position: sticky; top: 86px; align-self: start; display: none; }
@media (min-width: 980px) { .toc { display: block; } }
.toc a { display: block; color: var(--muted); padding: 5px 0; font-size: 0.92rem; }
.toc a:hover { color: var(--text); text-decoration: none; }
.prose { max-width: 760px; min-width: 0; }
.prose h2 { font-size: 1.6rem; margin-top: 8px; padding-top: 12px; scroll-margin-top: 80px; }
.prose h3 { margin-top: 26px; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--text); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: 6px 0; }
.prose section { padding: 0 0 36px; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

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

/* ---------- a11y ---------- */
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 50; padding: 10px 14px; border-radius: 10px;
  background: var(--accent); color: var(--on-accent); font-weight: 600; transition: top 0.15s ease;
}
.skip:focus { top: 12px; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
main:focus { outline: none; }

/* ---------- status badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.02em;
  padding: 3px 9px; border-radius: 999px; white-space: nowrap; vertical-align: middle;
  background: var(--accent-soft); color: var(--accent-text); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.dev { background: var(--bg-2); color: var(--muted); border-color: var(--border); }
.badge.new { background: var(--accent-soft); color: var(--accent-text); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.badge.soon { background: color-mix(in srgb, var(--warn) 12%, transparent); color: color-mix(in srgb, var(--warn) 60%, var(--text)); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.card h3 .badge { margin-left: 6px; }

/* ---------- x402 flow ---------- */
.payflow { display: grid; gap: 10px; counter-reset: pf; }
@media (min-width: 900px) { .payflow { grid-template-columns: repeat(4, 1fr); gap: 14px; } }
.payflow .pf {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 16px 16px 58px; min-height: 84px;
}
.payflow .pf::before {
  counter-increment: pf; content: counter(pf); position: absolute; left: 16px; top: 16px;
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 0.88rem;
}
.payflow .pf.ok::before { background: var(--green); color: #000; }
.payflow .pf b { display: block; color: var(--text); font-size: 0.98rem; margin-bottom: 2px; }
.payflow .pf span { color: var(--muted); font-size: 0.9rem; }
@media (min-width: 900px) {
  .payflow .pf:not(:last-child)::after {
    content: "→"; position: absolute; right: -13px; top: 50%; transform: translateY(-50%); z-index: 1;
    width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 0.8rem;
    background: var(--bg-2); border: 1px solid var(--border); color: var(--muted);
  }
}

/* ---------- get started page ---------- */
.need { display: grid; gap: 12px; }
@media (min-width: 720px) { .need { grid-template-columns: repeat(3, 1fr); } }
.need .card { display: grid; grid-template-columns: 40px 1fr; gap: 12px; align-items: start; padding: 18px; }
.need .card .ico { margin: 0; }
.need h3 { margin-bottom: 2px; font-size: 1rem; }
.onboard { display: grid; gap: 18px; counter-reset: ob; }
.ob {
  display: grid; gap: 18px; align-items: center; background: var(--surface); border: 1px solid var(--border);
  border-radius: 18px; padding: 22px 18px;
}
@media (min-width: 820px) { .ob { grid-template-columns: 1fr 340px; padding: 28px; gap: 32px; } }
.ob-num {
  counter-increment: ob; display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: var(--accent); color: var(--on-accent); font-weight: 750; margin-bottom: 12px;
}
.ob-num::before { content: counter(ob); }
.ob h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); margin-bottom: 0.4em; }
.ob p { color: var(--muted); margin-bottom: 0.6em; }
.ob p:last-child { margin-bottom: 0; }
.tg { background: var(--chat-bg); border: 1px solid var(--border); border-radius: 16px; padding: 12px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.tg .msg { animation: none; opacity: 1; transform: none; max-width: 100%; }
.tg .msg.me { max-width: 80%; }
.tg .btns { flex-wrap: wrap; }
.tg .btns span { flex: 1 1 auto; }
.tg .btns.col { flex-direction: column; }
.tg .note { font-size: 0.74rem; color: var(--muted); text-align: center; }
.big-cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn-lg { height: 52px; padding: 0 24px; font-size: 1.02rem; border-radius: 13px; }
.prose .sub { scroll-margin-top: 80px; padding-top: 4px; }
.prose .sub h3 { font-size: 1.2rem; }
.prose h2 .badge { font-size: 0.7rem; letter-spacing: 0; }
.prose h2 code { font-size: 0.8em; }
.ob code, .tg code, details code { overflow-wrap: anywhere; }
.need .card .ico svg { width: 20px; height: 20px; }

/* Consistent brand details and comfortable mobile controls. */
.chat-avatar { color: var(--on-accent); }
.nav-links a[aria-current="page"] { color: var(--accent-text); }
.card { transition: border-color .18s ease, transform .18s ease; }
.card:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.hero h1 { letter-spacing: -.045em; }
.hero { isolation: isolate; }
@media (max-width: 520px) { .nav .wrap { gap: 10px; } .nav-cta { gap: 6px; } .brand { gap: 6px; font-size: 1rem; } }

.brand .brand-mark { width: 28px; height: 28px; object-fit: contain; flex-shrink: 0; }
.brand-word { font-weight: 600; letter-spacing: -0.03em; font-size: 1.2rem; color: var(--text); }

.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; margin-top: 20px; }
.guide-grid figure { margin: 0; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; background: var(--surface); }
.guide-grid img { width: 100%; height: auto; }
.guide-grid figcaption { padding: 12px 14px; font-size: .95rem; line-height: 1.45; }

/* ---------- homepage refresh + agent economy page ---------- */
.diff-n {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; margin-bottom: 12px;
  background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 0.9rem;
}
.econ-hero { padding: 64px 0 40px; }
.econ-hero .lede { max-width: 680px; }
.econ-list { margin: 0; padding-left: 1.2em; color: var(--muted); font-size: 0.95rem; }
.econ-list li { margin: 6px 0; }
.econ-list li strong { color: var(--text); }
@media (max-width: 520px) { .econ-hero { padding: 44px 0 24px; } }


/* ======================================================================
   Restrained look: flat surfaces, one typeface family, rules not boxes.
   (Overrides the earlier glossy styles; keep this block last.)
   ====================================================================== */
body { font-size: 16px; line-height: 1.6; }
.hero, .hero::before { background: none !important; }
.hero { border-bottom: 1px solid var(--border); }

/* Type: confident, not shouty. */
h1, h2, h3 { font-weight: 600; letter-spacing: -0.015em; }
.hero h1 { letter-spacing: -0.025em; font-weight: 600; }
.grad { background: none !important; -webkit-background-clip: border-box; background-clip: border-box; color: var(--text) !important; -webkit-text-fill-color: currentColor; }
.lede { color: var(--muted); }

/* Labels read like a spec sheet, not a sticker. */
.eyebrow {
  background: none; border: 0; padding: 0; border-radius: 0; gap: 0;
  font: 500 0.78rem/1.4 var(--mono); letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted);
}
.eyebrow .dot { display: none; }
.kicker {
  font: 500 0.78rem/1.4 var(--mono) !important; letter-spacing: 0.04em !important; text-transform: uppercase;
  color: var(--muted) !important; margin-bottom: 10px;
}
.kicker::before { content: "— "; color: var(--accent-text); }

/* Cards become ruled columns. */
.card {
  background: none; border: 0; border-top: 1px solid var(--border); border-radius: 0;
  padding: 18px 0 0; box-shadow: none;
}
.card:hover { border-color: var(--accent); transform: none; }
.card .ico { display: none; }
.card h3 { font-size: 1.02rem; margin-top: 0; }
.layer, .step, .payflow .pf, details { border-radius: var(--radius-lg); box-shadow: none; }
.layer .n, .step .n, .diff-n, .payflow .pf::before {
  background: none !important; color: var(--accent-text) !important; border: 1px solid var(--border);
  font: 500 0.82rem var(--mono) !important; border-radius: 6px;
}
.step { background: none; }

/* Controls and chrome. */
.btn, .btn-lg, .btn-sm { border-radius: var(--radius); box-shadow: none; }
.btn-sm { border-radius: var(--radius-sm); }
.btn:hover { transform: none; }
.chat { border-radius: var(--radius-lg); box-shadow: none; }
.chat-avatar { background: var(--accent); }
.nav { -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px); background: var(--material); }
.badge::before { display: none; }
.badge { border-radius: 4px; font-family: var(--mono); font-weight: 500; }
.guide-grid figure { border-color: var(--border); background: none; border-radius: var(--radius-lg); }
.step::before, .ob-num, .payflow .pf::before {
  background: none !important; color: var(--accent-text) !important; border: 1px solid var(--border);
  font: 500 0.82rem var(--mono) !important; border-radius: 4px; content: counter(s, decimal-leading-zero);
}
.ob-num { content: none; }
.ob-num::before { content: counter(ob, decimal-leading-zero); }
.payflow .pf::before { content: counter(pf, decimal-leading-zero); }
.step { border: 0; border-top: 1px solid var(--border); border-radius: 0; padding: 18px 0 0; }
/* The hero conversation is shown whole: no staged pop-in. */
.msg { opacity: 1 !important; transform: none !important; animation: none !important; }
.need .card, .card { display: block; }
.need .card { padding: 14px 0 0; }

/* The one-sentence line above the hero headline. */
.problem-line { margin: 0 0 18px; font-size: 1.15rem; line-height: 1.45; color: var(--muted); max-width: 34ch; }
.problem-line strong { color: var(--text); font-weight: 600; border-bottom: 2px solid var(--accent); }


/* Architecture diagram in motion: an orange dot walks each step of a task; boxes light up as it arrives. */
.arch .flow .dot { fill: var(--accent); }
.arch .ln { stroke-dasharray: 6 6; animation: arch-dash 1.6s linear infinite; }
@keyframes arch-dash { to { stroke-dashoffset: -12; } }
@keyframes pulse-b-tg { 0.0% { stroke-width: 3; } 8.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-tg { animation: pulse-b-tg 9s linear infinite; }
@keyframes pulse-b-coord { 0.0% { stroke-width: 1.5; filter: none; } 8.5% { stroke-width: 1.5; filter: none; } 9.0% { stroke-width: 3; } 17.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-coord { animation: pulse-b-coord 9s linear infinite; }
@keyframes pulse-b-repo { 0.0% { stroke-width: 1.5; filter: none; } 23.5% { stroke-width: 1.5; filter: none; } 24.0% { stroke-width: 3; } 32.0% { stroke-width: 1.5; filter: none; } 65.5% { stroke-width: 1.5; filter: none; } 66.0% { stroke-width: 3; } 74.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-repo { animation: pulse-b-repo 9s linear infinite; }
@keyframes pulse-b-agent { 0.0% { stroke-width: 1.5; filter: none; } 34.5% { stroke-width: 1.5; filter: none; } 35.0% { stroke-width: 3; } 43.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-agent { animation: pulse-b-agent 9s linear infinite; }
@keyframes pulse-b-proxy { 0.0% { stroke-width: 1.5; filter: none; } 43.5% { stroke-width: 1.5; filter: none; } 44.0% { stroke-width: 3; } 52.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-proxy { animation: pulse-b-proxy 9s linear infinite; }
@keyframes pulse-b-publish { 0.0% { stroke-width: 1.5; filter: none; } 54.5% { stroke-width: 1.5; filter: none; } 55.0% { stroke-width: 3; } 63.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-publish { animation: pulse-b-publish 9s linear infinite; }
@keyframes pulse-b-escrow { 0.0% { stroke-width: 1.5; filter: none; } 82.5% { stroke-width: 1.5; filter: none; } 83.0% { stroke-width: 3; } 91.0% { stroke-width: 1.5; filter: none; } 100.0% { stroke-width: 1.5; filter: none; } }
.arch #b-escrow { animation: pulse-b-escrow 9s linear infinite; }
@media (prefers-reduced-motion: reduce) {
  .arch .flow { display: none; }
  .arch .ln, .arch rect { animation: none !important; }
}

/* Agents talk to each other (homepage). */
.talk-grid { align-items: center; gap: 40px; }
.talk-lede { color: var(--muted); font-size: 1.08rem; }
.talk-list { margin: 18px 0 0; padding-left: 1.2em; color: var(--muted); }
.talk-list li { margin: 8px 0; }
.talk-list strong { color: var(--text); font-weight: 600; }
#talk { border-bottom: 1px solid var(--border); }
#talk .tg .note { text-align: left; font-size: 0.8rem; padding: 4px 2px 0; }

/* Status colours (f7931a.family palette): green for done/safe, red for errors. */
.payflow .pf.ok::before { color: var(--green) !important; border-color: color-mix(in srgb, var(--green) 45%, var(--border)) !important; }
.badge.ok { background: var(--green-soft); color: var(--green); border-color: color-mix(in srgb, var(--green) 35%, transparent); }
.badge.err { background: var(--red-soft); color: var(--red); border-color: color-mix(in srgb, var(--red) 35%, transparent); }
::selection { background: var(--accent); color: var(--on-accent); }
/* Dark: alternate bands are #1C1C1E, so lift what sits on them (cards #2C2C2E, chat wells back to black). */
:root:not([data-theme="light"]) section.alt { --surface: var(--surface-2); --chat-bg: var(--bg); --bubble: var(--bg-2); --code-bg: var(--bg); --hover: var(--surface-3); }

/* ---------- landing nav: menu button under 760px (index.html, guide.html: header.nav.has-menu) ---------- */
.nav-menu {
  display: none; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  width: 36px; height: 36px; border-radius: 10px; cursor: pointer; place-items: center; padding: 0;
}
.nav-menu:hover { background: var(--hover); }
.nav-menu .i-close { display: none; }
.nav.open .nav-menu .i-open { display: none; }
.nav.open .nav-menu .i-close { display: inline; }
@media (min-width: 760px) { .nav.has-menu .nav-links { display: flex; gap: 18px; } }
@media (min-width: 1040px) { .nav.has-menu .nav-links { gap: 22px; } }
@media (max-width: 759.98px) {
  .nav.has-menu .nav-menu:not([hidden]) { display: grid; }
  .nav.has-menu.open .nav-links {
    display: flex; flex-direction: column; gap: 0; margin: 0;
    position: absolute; top: 100%; left: 0; right: 0;
    padding: 6px 16px 12px; background: var(--bg); border-bottom: 1px solid var(--border);
  }
  .nav.has-menu.open .nav-links a { padding: 12px 0; font-size: 1rem; color: var(--text); border-bottom: 1px solid var(--border); }
  .nav.has-menu.open .nav-links a:last-child { border-bottom: 0; }
}

/* ---------- classic pages: slim banner pointing to the new product ---------- */
.classic-bar { background: var(--bg-2); border-bottom: 1px solid var(--border); font-size: 0.88rem; color: var(--muted); }
.classic-bar .wrap { padding-top: 9px; padding-bottom: 9px; }
.classic-bar a { font-weight: 600; white-space: nowrap; }