/* ChatExhibit — M0.1 landing shell
   Palette: paper #FCFCF9 · ink #191A1C · rule #D9D7CE · muted #5A5B57 · stamp oxblood #8C2B2B
   Type: Spectral (display+body) · IBM Plex Mono (metadata/labels) */

:root {
  --paper: #FCFCF9;
  --ink: #191A1C;
  --muted: #5A5B57;
  --rule: #DAD8CF;
  --stamp: #8C2B2B;
  --stamp-soft: #F4E9E7;
  --card: #FFFFFF;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Spectral", Georgia, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
header.site {
  border-bottom: 1px solid var(--rule);
  padding: 18px 0;
}
header.site .wrap {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.wordmark {
  font-weight: 700; font-size: 20px; letter-spacing: 0.01em; color: var(--ink); text-decoration: none;
}
.wordmark sup { font-size: 10px; font-weight: 400; }
.vertical-switch {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
}
.vertical-switch a { color: var(--muted); text-decoration: none; padding: 4px 0; margin-left: 18px; }
.vertical-switch a.active { color: var(--stamp); border-bottom: 2px solid var(--stamp); }
.vertical-switch a:hover { color: var(--ink); }

/* ---------- shared blocks ---------- */
main { padding-bottom: 40px; }
section { padding: 56px 0 8px; }

.eyebrow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--stamp); margin-bottom: 14px;
}

h1 { font-size: clamp(34px, 6vw, 48px); line-height: 1.12; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 27px; line-height: 1.25; font-weight: 700; margin-bottom: 16px; }
h3 { font-size: 19px; font-weight: 700; margin-bottom: 6px; }

.lede { font-size: 20px; color: var(--ink); margin: 18px 0 8px; max-width: 640px; }
.sub { color: var(--muted); }
p + p { margin-top: 12px; }

/* exhibit-tab section labels */
.tab {
  display: inline-block;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--stamp-soft); color: var(--stamp);
  border: 1px solid var(--stamp);
  padding: 3px 10px; margin-bottom: 16px;
}

/* ---------- hero exhibit sample (the signature element) ---------- */
.exhibit {
  margin: 40px 0 8px;
  background: var(--card);
  border: 1px solid var(--rule);
  box-shadow: 0 1px 0 var(--rule), 0 12px 28px rgba(25,26,28,0.07);
  padding: 26px 28px 20px;
  position: relative;
}
.exhibit .stampline {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  border-bottom: 1px solid var(--rule); padding-bottom: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.exhibit .exlabel {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--stamp); border: 1.5px solid var(--stamp); padding: 4px 10px;
  transform: rotate(-1.2deg);
}
.exhibit .exmeta {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px; color: var(--muted); text-align: right; line-height: 1.5;
}
.msg { padding: 10px 0; }
.msg + .msg { border-top: 1px dotted var(--rule); }
.msg .who {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px; color: var(--muted); margin-bottom: 3px;
}
.msg .who b { color: var(--ink); font-weight: 600; }
.msg .text { font-size: 16.5px; }
.gap {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 12px; color: var(--stamp);
  border: 1px dashed var(--stamp); background: var(--stamp-soft);
  padding: 7px 12px; margin: 12px 0; text-align: center;
}
.exhibit .foot {
  border-top: 1px solid var(--rule); margin-top: 16px; padding-top: 10px;
  display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10.5px; color: var(--muted);
}
.sample-note {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 11px; color: var(--muted); margin-top: 10px;
}

/* ---------- forms ---------- */
.capture {
  background: var(--card); border: 1px solid var(--rule);
  padding: 26px 28px; margin-top: 28px;
}
.capture h3 { margin-bottom: 4px; }
.capture p { color: var(--muted); font-size: 16px; margin-bottom: 14px; }
form.signup { display: flex; gap: 10px; flex-wrap: wrap; }
form.signup input[type="email"], form.signup input[type="text"] {
  flex: 1 1 240px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 15px; padding: 12px 14px;
  border: 1px solid var(--ink); background: var(--paper); color: var(--ink);
}
form.signup input:focus { outline: 2px solid var(--stamp); outline-offset: 1px; }
form.signup button {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 14px; letter-spacing: 0.04em;
  padding: 12px 22px; cursor: pointer;
  background: var(--stamp); color: #fff; border: 1px solid var(--stamp);
}
form.signup button:hover { background: #74221F; }
form.signup button:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.fineprint { font-size: 13px; color: var(--muted); margin-top: 10px; font-family: "IBM Plex Mono", ui-monospace, monospace; }

/* honeypot */
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

/* ---------- lists / steps ---------- */
ol.steps { list-style: none; counter-reset: step; margin-top: 8px; }
ol.steps li { counter-increment: step; padding: 16px 0 16px 56px; position: relative; border-top: 1px solid var(--rule); }
ol.steps li:first-child { border-top: 0; }
ol.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 16px;
  width: 34px; height: 34px; line-height: 32px; text-align: center;
  border: 1.5px solid var(--stamp); color: var(--stamp);
  font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 15px;
}
ul.features { list-style: none; margin-top: 8px; }
ul.features li { padding: 12px 0 12px 26px; position: relative; border-top: 1px solid var(--rule); }
ul.features li:first-child { border-top: 0; }
ul.features li::before { content: "§"; position: absolute; left: 0; color: var(--stamp); font-family: "Spectral", serif; }
ul.features b { font-weight: 600; }

/* ---------- honest section ---------- */
.honest {
  border: 1px solid var(--ink); background: var(--card);
  padding: 24px 28px; margin-top: 8px;
}
.honest ul { list-style: none; }
.honest li { padding: 10px 0 10px 24px; position: relative; }
.honest li::before { content: "—"; position: absolute; left: 0; color: var(--stamp); }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--rule); margin-top: 64px; padding: 28px 0 48px;
  color: var(--muted); font-size: 14px;
}
footer.site .wrap p + p { margin-top: 8px; }
footer.site .legal { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 12px; }

a { color: var(--stamp); }
a:focus-visible { outline: 2px solid var(--stamp); outline-offset: 2px; }

@media (max-width: 560px) {
  body { font-size: 17px; }
  .exhibit { padding: 18px 16px 14px; }
  section { padding: 44px 0 8px; }
}

/* ---------- secondary captures: roadmap + beta (M2.4 / M2.2) ----------
   Quieter than the primary launch-list capture: dashed card, outline button.
   .capture.alt (0,2,0) intentionally outranks .capture (0,1,0). */
.capture.alt {
  background: transparent;
  border: 1px dashed var(--rule);
}
.capture.alt form.signup button {
  background: transparent;
  color: var(--stamp);
}
.capture.alt form.signup button:hover {
  background: var(--stamp);
  color: #fff;
}