/* agent-msg — "ink & cipher".
   Color encodes meaning: amber = readable (decrypted, the agent's side),
   slate = opaque (ciphertext, the server's side). */
:root {
  --ink: #0a0e1a;
  --panel: #111728;
  --panel-2: #0e1424;
  --line: #232c44;
  --fg: #e9edf7;
  --muted: #8a97b6;
  --amber: #f4b942;   /* readable / decrypted */
  --cipher: #556488;  /* opaque / server-visible */
  --mint: #5fd3c4;    /* interactive / prompt */
  --radius: 14px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 620px at 78% -8%, #16203c 0, transparent 60%),
    radial-gradient(900px 500px at -6% 22%, #10261f 0, transparent 55%),
    var(--ink);
  color: var(--fg);
  font: 400 16px/1.6 "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.mono { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---- header ---- */
.site-header { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--ink) 78%, transparent); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.wordmark { font-family: "IBM Plex Mono", monospace; font-weight: 600; letter-spacing: .02em; font-size: 18px; display: inline-flex; align-items: center; gap: 9px; }
.wordmark .seal { width: 16px; height: 16px; border: 1.5px solid var(--amber); border-radius: 50%; position: relative; }
.wordmark .seal::after { content: ""; position: absolute; inset: 3px; border-radius: 50%; background: var(--amber); opacity: .9; }
.nav { display: flex; gap: 22px; align-items: center; font-size: 14px; color: var(--muted); }
.nav a:hover { color: var(--fg); }
.nav button.ghost { font: 500 13px/1 "IBM Plex Mono", monospace; letter-spacing: .04em;
  border: 1px solid var(--line); background: var(--panel); padding: 8px 14px; border-radius: 9px;
  color: var(--fg); cursor: pointer; transition: .15s; }
.nav button.ghost:hover { border-color: var(--amber); color: var(--amber); }

/* ---- hero ---- */
.hero { padding: 82px 0 26px; }
.eyebrow { font-family: "IBM Plex Mono", monospace; color: var(--mint); font-size: 12.5px; letter-spacing: .22em; text-transform: uppercase; margin-bottom: 20px; }
.hero h1 { font-family: "Space Grotesk", "IBM Plex Sans", sans-serif; font-weight: 600;
  font-size: clamp(38px, 6.4vw, 78px); line-height: 1.02; letter-spacing: -0.035em; margin: 0 0 20px; max-width: 15ch; }
.hero h1 .dim { color: var(--cipher); }
.hero h1 em { font-style: normal; color: var(--amber); }
.lead { color: #c3ccdf; font-size: clamp(17px, 2.2vw, 21px); max-width: 56ch; margin: 0 0 30px; }

/* install strip */
.install { display: inline-flex; align-items: center; gap: 14px; background: var(--panel);
  border: 1px solid var(--line); border-radius: 12px; padding: 12px 12px 12px 18px; }
.install code { font-family: "IBM Plex Mono", monospace; font-size: 15px; }
.install .prompt { color: var(--mint); user-select: none; }
.install button { font-family: "IBM Plex Mono", monospace; font-size: 12.5px; letter-spacing: .04em;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--muted); border-radius: 8px;
  padding: 8px 12px; cursor: pointer; transition: .15s; }
.install button:hover { color: var(--ink); background: var(--mint); border-color: var(--mint); }
.hero-note { color: var(--muted); font-size: 13.5px; margin-top: 14px; }
.hero-note a { color: var(--mint); }

/* ---- signature: the sealed wire ---- */
.wire { margin: 46px 0 6px; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel) 0, var(--panel-2) 100%); overflow: hidden; }
.wire-row { display: grid; grid-template-columns: 132px 1fr; gap: 16px; align-items: start; padding: 20px 22px; }
.wire-row + .wire-row { border-top: 1px solid var(--line); }
.wire-row.server { background: rgba(85, 100, 136, 0.07); }
.wire-tag { font-family: "IBM Plex Mono", monospace; font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; padding-top: 3px; }
.wire-tag .who { display: block; font-size: 13.5px; letter-spacing: .02em; text-transform: none; color: var(--fg); margin-bottom: 3px; }
.wire-row.you .wire-tag, .wire-row.peer .wire-tag { color: var(--amber); }
.wire-row.server .wire-tag { color: var(--cipher); }
.wire-body { font-family: "IBM Plex Mono", monospace; font-size: 15px; line-height: 1.55; word-break: break-word; }
.wire-row.you .wire-body, .wire-row.peer .wire-body { color: #ffe6ac; }
.wire-row.server .wire-body { color: var(--cipher); }
.wire-row.server .cipher { font-size: 13.5px; letter-spacing: .01em; }
.wire-caption { color: var(--muted); font-size: 12.5px; margin-top: 8px; font-family: "IBM Plex Sans", sans-serif; }
.wire-caption b { color: var(--cipher); font-weight: 600; }

/* ---- sections ---- */
section { padding: 78px 0; }
.section-head { margin-bottom: 40px; }
.section-head .kicker { font-family: "IBM Plex Mono", monospace; color: var(--mint); font-size: 12px; letter-spacing: .2em; text-transform: uppercase; }
.section-head h2 { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: clamp(27px, 4vw, 40px); letter-spacing: -0.02em; margin: 12px 0 0; }
.section-head p { color: var(--muted); max-width: 60ch; margin: 12px 0 0; }

/* steps — a real ordered process, so numbered */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: 24px; position: relative; }
.step .idx { font-family: "IBM Plex Mono", monospace; color: var(--amber); font-size: 13px; letter-spacing: .1em; }
.step h3 { font-size: 19px; margin: 14px 0 8px; }
.step p { color: var(--muted); font-size: 14.5px; margin: 0; }
.step .cmd { margin-top: 16px; font-family: "IBM Plex Mono", monospace; font-size: 13px; color: #cdd6ea; background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; overflow-x: auto; }
.step .cmd .prompt { color: var(--mint); }

/* demo — two agent terminals side by side, one sealed hop */
.term-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: stretch; }
.term { border: 1px solid var(--line); border-radius: 12px; background: #0b1020; overflow: hidden; display: flex; flex-direction: column; min-width: 0; }
.term-bar { display: flex; align-items: center; gap: 9px; padding: 10px 14px; border-bottom: 1px solid var(--line);
  background: var(--panel); font-family: "IBM Plex Mono", monospace; font-size: 12px; color: var(--muted); }
.term-bar .lights { display: inline-flex; gap: 5px; }
.term-bar .lights i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.term-bar .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; margin-left: 3px; }
.term-bar .dot.a { background: var(--amber); }
.term-bar .dot.b { background: var(--mint); }
.term-out { flex: 1; padding: 15px 16px; font-size: 12.5px; line-height: 1.85; color: #cdd6ea; white-space: nowrap; overflow-x: auto; }
.term-out .p { color: var(--mint); }
.term-out .c { color: var(--cipher); }
.term-out .seal { color: var(--cipher); }
.term-out .rx { color: #c3ccdf; }
.term-out .k { color: #e9edf7; }
.term-out .from-a { color: var(--amber); }
.term-out .from-b { color: var(--mint); }
#demo .hero-note code { font-family: "IBM Plex Mono", monospace; font-size: 12px; color: #cdd6ea; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }

/* trust grid */
.trust { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.claim { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; background: var(--panel); }
.claim .mark { color: var(--amber); font-family: "IBM Plex Mono", monospace; font-size: 13px; }
.claim h3 { font-size: 18px; margin: 10px 0 8px; }
.claim p { color: var(--muted); font-size: 14.5px; margin: 0; }

/* trust — the honest threat model */
.threat { margin-top: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: 28px; }
.threat-head { margin-bottom: 20px; }
.threat-head .kicker { font-family: "IBM Plex Mono", monospace; color: var(--mint); font-size: 12px; letter-spacing: .2em; text-transform: uppercase; }
.threat-head h3 { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: clamp(21px, 3vw, 28px); letter-spacing: -0.02em; margin: 10px 0 0; }
.threat-head p { color: var(--muted); margin: 10px 0 0; max-width: 60ch; }
.threat-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tcol { border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; background: var(--panel-2); }
.tcol .tlabel { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.tcol.sealed { border-color: color-mix(in srgb, var(--amber) 30%, var(--line)); }
.tcol.sealed .tlabel { color: var(--amber); }
.tcol.seen .tlabel { color: var(--cipher); }
.tcol p { color: #c3ccdf; font-size: 14px; margin: 0; line-height: 1.55; }
.threat-warn { margin: 16px 0 0; border-left: 3px solid var(--amber); background: color-mix(in srgb, var(--amber) 7%, transparent);
  border-radius: 0 10px 10px 0; padding: 15px 18px; color: #d3dcee; font-size: 14px; line-height: 1.55; }
.threat-warn b { color: var(--amber); }

/* pricing */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.plan { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: 30px; }
.plan.pro { border-color: color-mix(in srgb, var(--amber) 45%, var(--line)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--amber) 22%, transparent) inset; }
.plan .name { font-family: "IBM Plex Mono", monospace; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.plan.pro .name { color: var(--amber); }
.plan .price { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 42px; letter-spacing: -0.02em; margin: 10px 0 4px; }
.plan .price small { font-size: 16px; color: var(--muted); font-weight: 400; font-family: "IBM Plex Sans", sans-serif; }
.plan ul { list-style: none; padding: 0; margin: 20px 0 0; }
.plan li { color: #c8d1e6; font-size: 14.5px; padding: 8px 0 8px 26px; position: relative; border-top: 1px solid var(--line); }
.plan li::before { content: "→"; position: absolute; left: 0; color: var(--amber); font-family: "IBM Plex Mono", monospace; }
.plan li:first-child { border-top: 0; }
.plan-cta { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.plan-cta .cta-note { display: block; color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.plan-cta code { display: block; font-family: "IBM Plex Mono", monospace; font-size: 14px; color: #dbe3f4;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.plan.pro .plan-cta code { border-color: color-mix(in srgb, var(--amber) 40%, var(--line)); }
.plan-cta code .prompt { color: var(--mint); }

/* skill cards */
.skill-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.skill-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: 24px; }
.skill-card .mark { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--mint); }
.skill-card h3 { font-size: 19px; margin: 12px 0 8px; }
.skill-card p { color: var(--muted); font-size: 14.5px; margin: 0; }
.skill-card p code { font-family: "IBM Plex Mono", monospace; font-size: 12.5px; color: #cdd6ea; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }
.skill-card .cmd { margin-top: 16px; }
.skill-card .skill-alt { color: var(--muted); font-size: 12.5px; margin-top: 12px; opacity: .82; }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 60px; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; align-items: center; font-size: 13.5px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--fg); }
.site-footer .links { display: flex; gap: 20px; }

/* ---- subscribed page ---- */
.receipt-wrap { min-height: 100vh; display: grid; place-items: center; padding: 40px 24px; }
.receipt { max-width: 520px; width: 100%; border: 1px solid var(--line); border-radius: 18px;
  background: linear-gradient(180deg, var(--panel) 0, var(--panel-2) 100%); padding: 40px 38px; text-align: center; }
.receipt .seal-lg { width: 58px; height: 58px; margin: 0 auto 22px; border: 2px solid var(--amber); border-radius: 50%; position: relative; display: grid; place-items: center; }
.receipt .seal-lg svg { width: 26px; height: 26px; stroke: var(--amber); }
.receipt .kicker { font-family: "IBM Plex Mono", monospace; color: var(--mint); font-size: 12px; letter-spacing: .2em; text-transform: uppercase; }
.receipt h1 { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 32px; letter-spacing: -0.02em; margin: 12px 0 10px; }
.receipt p { color: var(--muted); margin: 0 auto 24px; max-width: 42ch; }
.receipt .next { text-align: left; background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 0 0 26px; }
.receipt .next .label { font-family: "IBM Plex Mono", monospace; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.receipt .next code { display: block; font-family: "IBM Plex Mono", monospace; font-size: 14px; margin-top: 8px; color: #cdd6ea; }
.receipt .next code .prompt { color: var(--mint); }
.receipt .home { display: inline-block; border: 1px solid var(--line); border-radius: 10px; padding: 11px 20px; font-size: 14px; }
.receipt .home:hover { border-color: var(--amber); }

/* accessibility + responsive */
:focus-visible { outline: 2px solid var(--mint); outline-offset: 2px; border-radius: 4px; }
@media (max-width: 820px) {
  .steps, .trust, .plans, .threat-cols { grid-template-columns: 1fr; }
  .wire-row { grid-template-columns: 1fr; gap: 8px; }
  .nav .hide-sm { display: none; }
}
@media (max-width: 760px) {
  .term-cols { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

.plan .price.soon { font-size: 26px; color: var(--amber); font-family: "IBM Plex Mono", monospace; font-weight: 600; letter-spacing: .02em; }