/* The app's own palette, from DESIGN.md: rail #1C1A18, canvas #23211E, surface #2D2B28,
   hairline #3C3935, accent #77CD97 with dark ink on top. Warm workshop, never cool grey. */
:root {
  --rail: #1c1a18;
  --canvas: #23211e;
  --surface: #2d2b28;
  --raised: #35322e;
  --hairline: #3c3935;
  --accent: #77cd97;
  --on-accent: #14231a;
  --ink: #ece8e1;
  --ink-dim: #a9a29a;
  --ink-faint: #776f66;
  --serif: "New York", ui-serif, Iowan Old Style, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}

main { max-width: 780px; margin: 0 auto; padding: 0 28px 96px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── hero ───────────────────────────────────────────────────────────── */

header {
  background: var(--rail);
  border-bottom: 1px solid var(--hairline);
  padding: 96px 28px 84px;
  text-align: center;
}

header img.icon {
  width: 116px; height: 116px;
  border-radius: 26px;
  margin-bottom: 26px;
}

h1 {
  font: 500 62px/1 var(--serif);
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.tagline {
  font: 400 21px/1.5 var(--serif);
  color: var(--ink-dim);
  max-width: 30ch;
  margin: 0 auto 34px;
}

.download {
  display: inline-block;
  background: var(--accent);
  color: var(--on-accent);
  font: 600 16px/1 var(--sans);
  padding: 15px 30px;
  border-radius: 999px;
}
.download:hover { text-decoration: none; filter: brightness(1.08); }

.requires {
  margin: 18px auto 0;
  font-size: 13px;
  color: var(--ink-faint);
  font-family: var(--mono);
}

/* ── sections ───────────────────────────────────────────────────────── */

section { padding-top: 76px; }

h2 {
  font: 500 32px/1.25 var(--serif);
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

p { max-width: 62ch; }
p.lead { color: var(--ink-dim); }

code { font: 400 0.88em var(--mono); color: var(--accent); }

pre {
  background: var(--rail);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px 22px;
  overflow-x: auto;
  font: 400 13.5px/1.75 var(--mono);
  color: var(--ink-dim);
}
pre code { color: inherit; font-size: inherit; }
pre b { color: var(--ink); font-weight: 500; }
pre i { color: var(--ink-faint); font-style: normal; }

/* ── the window mock ────────────────────────────────────────────────── */

.window {
  margin-top: 34px;
  border: 1px solid var(--hairline);
  border-radius: 16px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 168px 1fr;
  background: var(--canvas);
  user-select: none;
}

.window .rail {
  background: var(--rail);
  border-right: 1px solid var(--hairline);
  padding: 14px 10px;
}

.dots { display: flex; gap: 7px; padding: 2px 6px 16px; }
.dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--hairline); }

.agent {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 8px; border-radius: 8px;
  font-size: 13px; color: var(--ink-dim);
}
.agent.on { background: var(--surface); color: var(--ink); }
.agent .mono {
  width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center;
  font: 600 11px var(--sans);
  background: var(--surface); color: var(--ink-faint);
}
.agent.on .mono { background: var(--accent); color: var(--on-accent); }

.pane { padding: 40px 30px 22px; text-align: center; }
.pane .greet { font: 500 25px/1.3 var(--serif); margin-bottom: 4px; }
.pane .sub { font-size: 13px; color: var(--ink-faint); margin-bottom: 26px; }

.composer {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 13px 13px 10px;
  text-align: left;
}
.composer .ph { font-size: 13.5px; color: var(--ink-faint); padding: 2px 3px 16px; }
.composer .row { display: flex; align-items: center; gap: 8px; }
.composer .chip {
  font: 400 11px var(--sans); color: var(--ink-faint);
  border: 1px solid var(--hairline); border-radius: 999px; padding: 3px 9px;
}
.composer .send {
  margin-left: auto;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: var(--on-accent);
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
}

.cards { display: flex; gap: 8px; margin-top: 16px; }
.cards div {
  flex: 1; text-align: left;
  border: 1px solid var(--hairline); border-radius: 10px;
  padding: 9px 11px; font-size: 11.5px; color: var(--ink-dim);
}

.caption { font-size: 12.5px; color: var(--ink-faint); margin-top: 12px; }

/* ── feature list ───────────────────────────────────────────────────── */

.features { list-style: none; padding: 0; margin: 30px 0 0; }
.features li {
  padding: 22px 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 26px;
}
.features li:last-child { border-bottom: 1px solid var(--hairline); }
.features h3 { margin: 0; font: 500 17px/1.5 var(--sans); }
.features p { margin: 0; color: var(--ink-dim); font-size: 15.5px; }

/* ── footer ─────────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--hairline);
  margin-top: 90px;
  padding: 30px 28px 60px;
  text-align: center;
  font-size: 13px;
  color: var(--ink-faint);
}
footer p { max-width: none; margin: 6px 0; }

@media (max-width: 640px) {
  h1 { font-size: 46px; }
  .window { grid-template-columns: 1fr; }
  .window .rail { display: none; }
  .features li { grid-template-columns: 1fr; gap: 6px; }
  .cards { display: none; }
}