/* The Executive AI Toolkit — "the brief": a premium, minimal executive briefing.
   Palette: pine/ink on warm paper. Type: Newsreader (display) + IBM Plex Sans/Mono. */

:root {
  --paper:    #FAFAF7;
  --ink:      #1a231e;
  --muted:    #5e665f;
  --pine:     #1f3d33;
  --pine-deep:#16291f;
  --rule:     #e4e5df;
  --signal:   #9c3b27;   /* scarcity only */

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "IBM Plex Sans", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 720px;
  --gutter: 28px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- shared atoms ---- */
.kicker, .docmeta, .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.kicker { display: block; margin: 0 0 18px; color: var(--pine); }

h1, h2, h3 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.01em; }

.btn {
  display: inline-block;
  background: var(--pine);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  padding: 14px 28px;
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  transition: background .18s ease, transform .18s ease;
}
.btn:hover { background: var(--pine-deep); transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--pine); outline-offset: 3px; }

/* ---- masthead ---- */
.masthead {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px var(--gutter) 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}
.wordmark { font-family: var(--serif); font-size: 18px; font-weight: 500; }

/* ---- section rhythm ---- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
main > section { padding: 72px 0; border-top: 1px solid var(--rule); }
main > section:first-child { border-top: 0; }

/* ---- hero ---- */
.hero { padding-top: 64px; }
.hero .eyebrow { display: block; margin-bottom: 22px; }
.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  line-height: 1.04;
  margin: 0 0 26px;
}
.lead { font-size: 20px; color: #2c352f; max-width: 38em; margin: 0 0 38px; }
.hero-actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }

/* ---- seat marks (the signature) ---- */
.seats { display: flex; align-items: center; gap: 12px; }
.seat-marks { display: inline-flex; gap: 6px; }
.seat-marks i {
  width: 11px; height: 11px; border-radius: 2px;
  border: 1.5px solid var(--pine);
  background: transparent;
  display: block;
}
.seat-marks i.taken { background: var(--pine); }
.seats-label { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.seats.low .seat-marks i { border-color: var(--signal); }
.seats.low .seat-marks i.taken { background: var(--signal); }
.seats.low .seats-label { color: var(--signal); }

/* ---- film ---- */
.frame { aspect-ratio: 16 / 9; border: 1px solid var(--rule); border-radius: 3px; overflow: hidden; }
.frame iframe { width: 100%; height: 100%; border: 0; display: block; }

/* ---- what you leave with ---- */
.leave-h { font-size: clamp(28px, 4vw, 38px); margin: 0 0 28px; }
.leave { list-style: none; margin: 0; padding: 0; }
.leave li {
  padding: 16px 0 16px 28px;
  border-bottom: 1px solid var(--rule);
  position: relative;
  color: #2c352f;
}
.leave li:first-child { border-top: 1px solid var(--rule); }
.leave li::before {
  content: "—"; position: absolute; left: 0; color: var(--pine);
}

/* ---- how it works ---- */
.diff-line { font-family: var(--serif); font-size: clamp(22px, 3.2vw, 28px); line-height: 1.4; margin: 0; max-width: 24em; }

/* ---- syllabus (a real sequence → numbered) ---- */
.sessions { list-style: none; margin: 0; padding: 0; }
.sessions li { display: flex; gap: 22px; padding: 22px 0; border-top: 1px solid var(--rule); }
.sessions li:last-child { border-bottom: 1px solid var(--rule); }
.s-no { font-family: var(--serif); font-size: 30px; color: var(--pine); line-height: 1; min-width: 34px; }
.sessions h3 { font-size: 21px; margin: 2px 0 6px; }
.sessions h3 em { font-style: italic; color: var(--muted); font-size: 16px; }
.sessions p { margin: 0 0 8px; color: var(--muted); }
.s-date { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--ink); }

/* ---- terms ---- */
.terms { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.term p { margin: 0; color: #2c352f; }

/* ---- register ---- */
.register h2 { font-size: clamp(26px, 4vw, 34px); margin: 0 0 28px; }
.form { display: grid; gap: 20px; max-width: 440px; }
.field { display: grid; gap: 7px; }
.field label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.field .opt { text-transform: none; letter-spacing: 0; }
.field input {
  font-family: var(--sans); font-size: 16px; color: var(--ink);
  background: #fff;
  padding: 13px 14px;
  border: 1px solid var(--rule);
  border-radius: 2px;
}
.field input::placeholder { color: #9aa39b; }
.field input:focus-visible { outline: 2px solid var(--pine); outline-offset: 0; border-color: var(--pine); }
.btn-full { width: 100%; padding: 16px; margin-top: 4px; }
.fineprint { font-family: var(--mono); font-size: 12px; color: var(--muted); margin: 16px 0 0; }
.error {
  background: #fbecea; color: var(--signal);
  border: 1px solid #eccac3; border-radius: 2px;
  padding: 12px 14px; margin: 0 0 22px; font-size: 15px;
}

/* ---- footer ---- */
.foot {
  max-width: var(--maxw); margin: 0 auto;
  padding: 40px var(--gutter) 56px;
  border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  font-family: var(--serif); font-size: 15px;
}

/* ---- thank-you ---- */
.thanks { max-width: var(--maxw); margin: 0 auto; padding: 120px var(--gutter); }
.thanks h1 { font-size: clamp(34px, 6vw, 52px); margin: 0 0 20px; }
.thanks p { font-size: 19px; color: #2c352f; max-width: 32em; margin: 0 0 16px; }
.thanks .btn { margin-top: 20px; }

/* ---- hero reveal ---- */
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.hero .eyebrow, .hero h1, .hero .lead, .hero-actions { animation: rise .6s ease both; }
.hero h1 { animation-delay: .06s; }
.hero .lead { animation-delay: .12s; }
.hero-actions { animation-delay: .18s; }

/* ---- responsive ---- */
@media (max-width: 620px) {
  :root { --gutter: 22px; }
  body { font-size: 16px; }
  main > section { padding: 52px 0; }
  .hero { padding-top: 36px; }
  .hero h1 { font-size: 33px; line-height: 1.12; }
  .lead { font-size: 18px; margin-bottom: 32px; }
  .leave-h { font-size: 26px; }
  .diff-line { font-size: 21px; }
  .terms { grid-template-columns: 1fr; gap: 26px; }
  .hero-actions { gap: 18px; }
  .sessions li { gap: 16px; }
  .s-no { font-size: 26px; min-width: 26px; }
  .masthead .docmeta { display: none; }
  .foot { flex-direction: column; align-items: flex-start; gap: 6px; padding-bottom: 44px; }
}

@media (max-width: 400px) {
  :root { --gutter: 20px; }
  .hero h1 { font-size: 30px; }
  .register h2 { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---- two ways in (self-serve vs cohort) ---- */
.paths { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.path-card { border: 1px solid var(--rule); border-radius: 3px; padding: 28px 26px; background: #fff; display: flex; flex-direction: column; }
.path-card.feature { border-color: var(--pine); }
.path-card .ptag { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--pine); margin-bottom: 14px; }
.path-card h3 { font-size: 23px; margin: 0 0 6px; }
.path-card .price { font-family: var(--serif); font-size: 30px; color: var(--ink); margin: 0 0 14px; }
.path-card p { margin: 0 0 22px; color: var(--muted); flex: 1; }
.path-card .btn { align-self: flex-start; }

/* ---- welcome (post-purchase) ---- */
.welcome { max-width: var(--maxw); margin: 0 auto; padding: 64px var(--gutter) 96px; }
.welcome h1 { font-size: clamp(32px, 5vw, 46px); margin: 0 0 18px; }
.welcome .lead { margin-bottom: 34px; }
.keybar { display: flex; align-items: center; justify-content: space-between; gap: 14px; background: #fff; border: 1px solid var(--pine); border-radius: 3px; padding: 14px 16px; margin: 0 0 40px; }
.keybar .klabel { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 4px; }
.keybar code { font-family: var(--mono); font-size: 18px; color: var(--pine); letter-spacing: 0.04em; }
.steps { list-style: none; margin: 0 0 36px; padding: 0; counter-reset: step; }
.steps > li { padding: 20px 0 20px 46px; border-top: 1px solid var(--rule); position: relative; }
.steps > li:last-child { border-bottom: 1px solid var(--rule); }
.steps > li::before { counter-increment: step; content: counter(step); position: absolute; left: 0; top: 18px; width: 28px; height: 28px; border-radius: 50%; background: var(--pine); color: var(--paper); font-family: var(--mono); font-size: 13px; display: flex; align-items: center; justify-content: center; }
.step-t { display: block; margin-bottom: 12px; color: #2c352f; }
.chip { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: #f2f2ec; border: 1px solid var(--rule); border-radius: 3px; padding: 10px 12px; }
.chip code { font-family: var(--mono); font-size: 14px; color: var(--ink); overflow-x: auto; white-space: nowrap; }
.copy { flex: none; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; background: var(--pine); color: var(--paper); border: 0; border-radius: 2px; padding: 7px 12px; cursor: pointer; }
.copy:hover { background: var(--pine-deep); }
.copy.copied { background: var(--muted); }
.platform { margin: 0 0 32px; }
.platform > summary { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--pine); cursor: pointer; }
.platform[open] > summary { margin-bottom: 16px; }
.platform .note { font-size: 15px; color: var(--muted); margin: 0 0 14px; }
.trust { background: #eef1ee; border-left: 3px solid var(--pine); border-radius: 0 3px 3px 0; padding: 14px 16px; font-size: 15px; color: #2c352f; margin: 0 0 28px; }
.welcome .more { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.welcome .more a { color: var(--pine); }

@media (max-width: 620px) {
  .paths { grid-template-columns: 1fr; }
  .chip code { font-size: 12.5px; }
}